ML022890420

Response to Request for Additional Information Related to Creats Actuation Instrumentation License Amendment Request, Table of Contents - Test Procedure for 956A-201 and 897A-23X Series Detectors

ML022890420
Person / Time
Site:	Ginna
Issue date:	10/07/2002
From:	Rochester Gas & Electric Corp
To:	Clark R Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML022890420 (180)

Text

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Installation, Operation,and Maintenance Instruction Manual Area MonitoringSystem Model 955A Part No. 955A-1 Published 5/96 by VICTOREEN, INC.

Printed in U.S.A.

PROCEDURES, WARNINGS, AND CAUTIONS The equipment described in this manual is intended to be used -for the detection and measurement of ionizing radiation. It should be used only- by persons who have been trained -in the proper interpretation of its readings and the appropriate safety procedures to be followed in the presence of radiation.

"Althou'gh the equipment described in this manual is designed and manufactured in compliance with all applicable safety standards, certain hazards are inherent in the use of electronic and radiometric equipment.

WARNINGS and CAUTIONS are presented throughout this document to alert the ,user to potentially hazardous situations. A WARNING is a precautionary message preceding.-an operation which has the potential to cause personal injury or death.I A CAUTION is a precautionary message preceding an operation which has the potential to cause permanent damage to the equipment and/or loss of data. Failure to comply with WARNINGS and CAUTIONS is at the user's own risk and is sufficient cause to terminate the warranty agreement between Victoreen and the customer. ,

Adequate warnings are included in this manual and on the product itself to'cover hazards that may be encountered in normal use and servicing of this equipment. No other procedures are warranted

'by VICTOREEN.' It shall-be the owner's or user's responsibliity to see to it-that the procedures

-'described here are meticulously followed, and especially that WARNINGS arn-d'CAUTIONS are heeded. Failure on the part of the owner or user in any way to follow the prescribed procedures shall absolve VICTOREEN and its agents from any resulting liability.

Indicated battery and other, operational tests must be performed prior to each use to assure that the instrument is functioning properly. If applicable, failure to conduct periodic performance tests in

ýaccordance with ANSI N323-1978 (R1983) Radiation Protection Instrumentation Test and Calibration, paragraphs 4.6 and 5.4, and to keep records thereof in accordance with paragraph 4.5 of the same standard, could result in erroneous readings or potential danger. ANSI N323-1978 becomes, by this reference, a part of this operating procedure. ,

READ YOUR INSTRUCTION MANUAL iii

WARRANTY This instrument withý its accessories, excluding those acceisso'ries listed below, is warranted by VICTOREEN, INC., against defects in materials and workmanship date of original shipment. During the warranty period VICTOREEN for a period of one year from the at no charge an instrument containing such defect, provided will repair or, at its option, replace prepaid, to an authorized VICTOREEN service facility. Instrumentsthat it is returned, transportation repaired under warranty will be returned transportation prepaid.

In addition, the nuclear radiation calibration (when applicable) within its specified accuracy at the time of shipment. If an for each instrument is warranted to be the instrument will be-recalibrated at no charge, provided error in this initial calibration is discovered, it is returned as described above. This does not apply to any calibration 'deviation that may result from normal use.

There are no warranties, expressed or Implied, including warranty of merchantability or fitness, which extend beyond vithout limitation any Implied warranty excludes coverage of, and does not provide relief that stated here. This expressed of any kind or nature, including, but not limited to loss of for, incidental or consequential damages use; loss of sales or inconvenience. This exclusive remedy of the purchaser is limited to repair, recalibration, or replacement of the instrument at VICTOREEN's option.

This warranty does not apply if the product, as determined accident or misuse, or as a result of service or modification by VICTOREEN, has been damaged by by other than an authorized VICTOREEN service facility. This warranty is void if the unit is subjected to temperatures above 55 0 C unless otherwise indicated.

This warranty specifically excludes the following items manufacturers' warranties: Photomultiplier tubes, Geiger which are covered by their original solid-state detectors, batteries, and major ancillary items and proportional tubes, crystal and other of instrument systems, such as, but not limited to, recorders and pumps.

INSPECTION AND MATERIAL RETURN INSTRUCTIONS Instruments should be examiiiec and tested as soon damage, if any, should be filed at once with the carrier. as received by the purchaser. Claims for accompanied by a valid customer purchase order, identifying Any material returned for repair must be Return Form is provided at the back of this Instruction Manual. the work to be done. A Material returned for repair to enable our Sales Personnel to process Send the completed form with items the order as quickly as possible.

Material valued at $200.00 or more and/or weighing more than twenty pounds should be shipped the best way prepaid and fully insured.

Victoreen suggests that any instrument weighing over twenty paper and packed in a double corrugated carton or wooden pounds be wrapped in heavy Kraft box. Protect the instrument on all sides with at least three inches of excelsior or similar padding. Mark the case plainly with suitable caution warnings to ensure careful handling.

iv

Table of Contents_,,g Page Section 1 - Introduction ................................................................................................................... 1-I "GENERALDESCRIPTION...............-..... ...

-GEIGER-MUELLER DETECTOR, MODEL 897A-SERIES ......................................................... ............ -1 Application .... ................................ ..... .....-.-.-.- ..-..-... ....... .......-.. .......... ........-.... .......-..-

. -....._. ... I Specifications, GM Detector, Model 897A Series . .........................

........ 1-2 Specifications, GM Detector Check Source, Model 897A Series ............................................. 1-2 Specifications, Detector Preamplifier (Integral). ................................................................................ 1-3 "SYSTEMPART NUMBER DESCRI TION........... ................................................................................... 1-3 DETECTOR PART NUMBER DESCRIPTION .......................... ... ........................... -3 READOUT PART NUMBER DESCRI.TION .................. 1-4 UNIVERSAL DIGITAL RA7EMETER, MODEL 956A-201 ...... : ..................... ... .................

...................................... _........................................... ............ ...-. ........... ....... 1-5 Specifications Model 956A-201 ...................... .- ................ _.A..6 AUXILIARY EQUIPMENT ............. ............ . 1-7 956A-201 MODIFICATIONS .......... ......... .. ........ ....................... 1-7 RECOMMENDED SPARES ........................................... ........................................ .... ..... .... 1-8 Section 2 - Receiving Inspection And Storage ............................... ... : .......... 2-1 RECEIVING INSPECTION .................................. .......................................... ................................... 2-1

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. ...... o...°... ......... o..o.. .................. ............. ........ .. *...........o..... ....... Z- _

Section 3 - Installation ................................................................................................................... 3-1 INSTALLATION ................. .. ....... .......... ........................................................

. ............. 3-1 GM Detector Mounting ..................................................................... I *..'

Detector Setup ........ .... .GM .......... . 1 UDR Mounting .................................................................................................... ........................ ... . ... .. 3-1 ELECTRICAL INTERFACE ........................................................................ ........................ ... ......................... .. ................. 3-2 SEr-UP .... .............................................................................. . .. .. ......... ... ..........................

Section 4 - Operation/Functional Description .................................................................................... 4-1 OPERAI ION .. ......................... ......... ......... ...... ...... ................ ...... ........................ .......................... ...................... ....... .......... :................. 4-1 DETECI D ROPERAn NoRepon. ON. MODEL 897A-2XX .... .

.................... ............... 1

.............. . .. .............. 4-3 4...................

-1 GM Ik ScourcR spne Time............................ ..................... ....... ...... ............................................ ................ ............. :........._...

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N ....... ......................... .............................. ........................... ...... ....................... :.......... ..... I,- _ .... 4-3 Normalg Ope ation ..................................................... ............................. .......... ................ ........................ ............:..... ........ :....... :......... 4-3 Warm gh Alarms ...................................... ..... ................................................ ........................... ..... ....................................... 4-3 Range Alarm ................................ ..................... ........ ............. ........... ..................... ........ . ... ..............

. ...:....:....... .... ................ ..... '...44-3 Alar mn...... ............. . .... .... .... .. . . . . .. ..

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S:_ Check Source ........................................... ................ . . . .

FIRMW) A EVERSION ............. .................................... ....

VE................ .............. ............... ......

................................. :2ý....2.... ....... ..... ....... '._4-4 OPERATIONAL MODES ......................................... ................................. ................................................. °.................................... 4-5 Normal Operation, Mode ...................................

S........... ............................ ..... ............ .......

Data Entry Mode ................................................. . ...................................................................... 4-Alarm Inhibit Mode ................................................ ....... ... ................... ................................................. ..........

Check Source Mode ................ ..................... ................................................................................................ ......................L....4-5

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. 1Table of Contents (Cont.)

Page Address 4-28 ...

Data.Tramnsceivers........ -------- -*

.. ..-.. .. .; _ . . .... 4-29 Control Signal Buffer .............. ---

Decoding ... .. . ..... .2 .. . . .. . . . -- --- ....- 4-29 --

Address Prom I,-.,

... 4-30 E2-4-30 .....

Read -Write Cycles .......

4-30 Write Register Decoding__ -- ------- - 4-31 "CounterControl (Write Only) ... 4-31 .

Relay Control Register (Write Only).----- "4-32 .

Bargraph (Write Only)_----_---- -------- - 4-32 Status Indicators (Write Only) 33 "-

Display Control (Write Only).............. 4-34 Digital To Analog Converter And Output Circuitry (Write Only)

Read Register Decoding ......-..........---

................. 4-36 4-35 Data Entry (Read Only)-. __-_

Gross Counter (Read Only).-----

Sensitivity Select (Read Only). ................................

Switch Inputs ----.--------.. -- 4-37 "Option Board Bus. .....................................- - 4-38 Signal Input Circuitry --....".............................................

. -....-............................................. 4-38

. 4-38 Buffer Amplifier........................ ... 4-38 "Discriminators .............................................---. .

Signal Detection..............

Signal Multiplexer........................

Anti-Jam Circuitry. .....................................

4-38 High Voltage Supply.................... S...

.... / .....

.- Relay Circuit Board-

.. * .. ... ... :. ...... ....... 4-43 Front Panel Circuit Board ....- ....

Circuit Deicription (Front Panel Circuit Board)

. .......-* .._.2 ... ... .. *.. ..* ... ... .. 4-45 Power Supply-. . . . . . . 2"~~~~

......... ~~. ........ ........

._ .. ..... ....... - . 434 Optional Circuit Boards .......... _ ....... -

Section 5 - M aintenance ..................................................................................... 5-1 MANrN C;E ................. . ..................... . ..... ....--..... 5-1 Section 6 - Calibration ............................................... ............................  :.................. :..,......6.-.........6-1 CALIBRATION................................ ......................................... ..... 6-1 CALIBRATION / ELECTRONIC ADJUSTMENT _.:. . . ... ........... ..... .............. ..............

.............. .... ........... 6 1......

956 UDR S3,'steiinField Calibration .......................... .. ....................................................................................................... 6-2 DETECTOR CALIB RATION ............................................................. ........................................................................................ 6-4 Plateau Verification ............................ ............................... ............................................................................................. 6-4

/

Table of Contents (Cont.)

Page Section 7 - Periodic Field Tests & Troubleshooting .......................................................................

7-1 TROUBLESHOOTING .......-. ..... *.....

PERIODIC FIELD T EST............

EQUIPMENT REQUIRED .............

MT PROCEDURE, 955A-XXYZ SYSTEM Check Source Response..................... .................................................... 7-2 DC Voltage Checks, 956A-201 UDR.........................................................................

Discriminator Check, 956A-201 EDR.......................".

High Voltage Check, 956A-201 UDR.............................."..- ......

Analog Output Check, 956A-201 UDR..........................."............ - -: -..... 7 Counter Test ................ 7 897A-2XX GM Detector Test......................................

DETECTOR TROUBLESHOOTING Detector Disassembly................. .

Detector Assembly_.... ___........................................................................................................

Discriminator Setpoint Adjustment (Factory Adjustment Only) 7-6

.)................... ..... .. 7-6 HV Power Supply Adjustment ..............................................................................

Anti-jam Setpoint Adjustment (Factory Adjustment Only).._._.-...........

.... .......... 7-7 DC Power Supply, Detector (Factory Test Only) ....................................

Signal Transmission, Detector (Factory Test Only) ....................

.................... 7-8 Check Source, Detector (Factory Test Only) ..........................................

DIGITAL RATEMET ER TROUBLES HOOTING ..................................... 7-8 UDR ELECtROniC ADJUSTMENTS............................

........ ................................................................................................. 7-9

.....- .......... 7-9 Signal Input DC Offset and Gain Adjustment (Factory Adjustment Only)...............................*..7-9 High and Low Discriminator Adjustments .................... ................. ......... .......................................................... 7-10 Anti-Jam Threshold Adjustment (Factory Adjustment Only)

....................................................................................... 7-10 Write Cycle Clock Adjustment (Factory Adjustment Only)

.......................................... 7-10 Appendix A. - Connector Designations ........................................................................................

8-1 Appendix B. - Applicable Drawings ........................................................................................

9-1 Appendix C. - Bill Of Materials .................................................................................................

10-1 Appendix D. - Coaxial Cable Termination Instructions ...........................................................

11-1 Appendix E. - Supplemental Data (Customer Specific)...............................................................

12-1 List of Figures Figure 1-1. Detector Plateau (typical) .........................................

..... ........ 1-4 Figure 1-2. Front Panel, Model 956A-201 Universal Digital Ratemeter (not to scale)

Figure 4-1. 897A Series Detector Block Diagram ................ 17.......

Figure 4-2. System Block D gram ..... ..................................

..... ..... 4-21 Figure 4-3. Page 1 of 3. Block Diagram - Main Circuit Board ... 4-23

..................... 4-24 Figure 4-4. Read / Write Timing Diagram.................................

Figure 4-5. .................... 4-27 Wnte Cycle Clock Tirmng Diagram ......... ....................................

Figure 4-6. Discriminator Operation. .............. 4-28 Figure 4-7. High Voltage Output (800VDC)........... 4-39

......... ..... ............. 4-42 Figure 4-8. Front Panel, Model 956A-201 . ...........................................

Figure 6-1. Detector Plateau (Typical) .......... ............ 4-44

..... ..................... ................................................................................... 6-5 viii

List of Tables Table 1-2. Recommended Spare Parts List -- - -.-.-.-----

Table 3-1. Input Voltage Jumper Position-. ----------------- 3-I1 Table 3-2. Divide Options Jumper Position ............................ ........ 3-1 Table 3-3. Rear Panel Connections . . .

-..................... . ..................... 3-2 Table 3-4. Connector P1 - Input/OutpuL.. ..... -- -... .- ..................

Table 3-5.

......... 3-3 Connector P2 - Detector Connector -......................------ .......- . 3-3 Table 3-6. Connector P3 - Power Input..................... .............- .........-- -.....................- .... 3-4' Table 3-7. Connector P4 - Detector High Voltage Table 3-8. 3-4 3...............

Connector P5 - Detector Signal Input ...........-

Table 3-9. -................

3-4 Connector P6 - Auxiliary /10- ................ -.... -................ 3-4 Table 3-10 Connector P7 - RS232C .....................

Table 3-11. 3-4 897A Detector Connection -.........--. .---.

Table 3-12.

....-..-... 3-4 Model 956A-201 Option Jumpers .. . .... --.-.-.-.------.-.----

Table 4-1. 3-5 Response Time Table 4-2. 4-2 Model 956A-201 Option Jumpers....................................-.

Table 4-3. 4-13 UDR Function Switch Positions/Function ....- - ------------------- ---.... 4-14 Table 4-4. Function Switch Entry Parameters.....- - - -.............--...-.....- ......----- *- -. . _ _.._ 4-15 Table 4-5. Model 956A-201 Error Codes - -. ---.----------------

Table 4-6. 4-17 Output Signals Table 4-7. 429 4-14)

UI Outputs......... 30 Table 4-8. Write Register Functions ..... . . ......

Table 4-9. Counter Control Register Write Functions 4-31

.................. 4-31 Table 4-10 Relay Control Register Write Functions.- ......... - - --..............- . .- ........................ 4-32 Table 4-11. Bargraph Write Address .......... -....... -... 4-32 Table 4-12. Status Indicator Write Functions ........-----...............................- ................ 4-33 Table 4-13. Hex Data (Written to Address 4008) ..........--- .................... . ............ 4-34 Table 4-14. Control Signal Address Decoding (U34).-.......

4-35 Table 4-15. Data Entry Read Functions ................. . ................... ----....... 4-36 Table 4-16 Function Switch Logic........------.. . ................... 4-36 Table 4-17. Sensitivity Select Read Functions. ...........- - ...............................- -....---.---......

Table 4-18 .... 4-37 Switch Input Bit Assignments .........- . . 4374-62)

Table 6-1. Electronic Adjustments, UDR.................................---............ .......... 6-I Table 6-2. Electronic Adjustments, Detector........................................................

Table 7-1. 6-1 DC Voltage Test Points .- ...........-......-............----...........................

Table 7-2. Discriminator Test Points

-..... 7-3

- - --.....- -.. 7-3 Table 7-3. High Voltage Test Points............... ...............--

Table 7-4.

-....................---.............. 7-3 Analog Output Test Points .-.................................................

7-4 Table 7-5. Analog Output Test Terminals ............................................................... 7-4 Table 7-6. Anti-Jam Threshold Adjustment .-...-....-.-..-..-...........-....-...... ...............................---- 7-10 ix

(BLANK PAGE)

X

Section 1 - Introduction General Description The Victoreen Model 955A is a single-channel area radiation monitoring system capable of operating over the ranges of 0.01 to 103 mR/h,,0.1 to' 104 mR/h, or 1 to 105 mR/h, dep'ending' on the detector selected.- The system monitors gamma radiation over a 5-decade when the radiation level decreases below a fail threshold, exceeds range and 'provides indication set point, or exceeds an over range, set point. The over range a warn set point, .exceeds a high benefits. .First, it prevents the system from displaying an ori-scale, feature provides two significant detector become saturated. Second, it lessens the risk of damaging but inaccurate, reading should the during an overrange condition. Relay outputs are available to activate the 'detector. by.disabling it outputs are available for trend display on 'a strip-chart recorder alarm annunciators. Analog monitoring system-has an integral check source to verify operational or computer. In addition, the of a Model 897A series Geiger-Mueller (G-M) Tube Detectorwith integrity. The system consists integral preamplifier and the Model 956A-201 Universal Digital Ratemeter '(UDR). -A more detailed description of each piece of equipment can be found in the following paragraphs.

Geiger-Muelier Detector, Model 897A-Series -.

Victoreen -897A-series GM detectors use-:a thin -walled Geiger-Mueller radiation. Each 897A-series detector has a GM tube, a check source, tlube to detect ionizing source is a low-level radioactive source actbated by a +15VDC and a preamplifier. The check meter movement. -The preamplifier provides the pulse conditioning'and cable driving capability necessary to drive a Victoreen 956A-201 series digital ratemeter. -

All 897A--series'-detectors are functionally identical. They differ and range. The 897A series detectors operate in the voltage range only in ho-using-maiterial, tube type, of the detector -plateau, -based on diffeFent high voltages, is located of 500 - 650 Vdc. An example in figure-'1-1. Refer to the specifications for all 897A-series GM detectors for further information.

-..-NOTE The 897A series GM detectors'contain an eight microcuri 3 6 CI check source. Nuclear Regulatory, Commission. regulations

. define this source as a exempt quantity.

Application The Model 897A GM Detector is designed to.operate with the Victoreen Digital Ratemeter (UDR) or with other VNctore'en readouts. Each Model 956A-201 Universal range. :Three measuremernt ranges are available: low, -medium, detector mfieas-ures a five decade and highs- The low range - covers 3

0.01 to 1 mR/lh, the medium covers 0.1 to 104 mR/h, and the 5 Model 897A detector may also be used with the Victoreen Model high cover '1 to'10 mR/h. The 960 Digital Radiation-Monitoring System equipment or the Victoreen Model 856 Analog Readout.

1-1

Specifications. GM Detector, Model 897A Series Dimensions (Approximate) 7 1/8 x 3 inches (18.1 x 7.6 cm)

Weight (Approximate) 1 lb. (0.45 kg Housing Matenal 897A-210, 897A-220, 897A-230 Aluminum, weatherproof 897A-211. 897A-221. 897A-231 Stainless Steel, weatherproof Fill Gas:

897A-210, 897A-211 Neon / Argon / Halogen 897A-220, 897A-221 Helium / Neon / Halogen 897A-230, 897A-231 Helium / Neon / Halogen GM Tube Wall Thickness:

897A-210, 897A-211 40 mg/cm 2 897A-220, 897A-221 80 mg/cm 2 897A-230, 897A-231 80 mg/cM 2 Mounting Wall mount Mating Connectors 897A-2xo:

92-7005-17A, 12 Pin Female 92-7005-12A, Bushing 92-7005-9A. Clamp 897A-2xl (stainless steel):

92-7005-15A. 12 Pin Female (Stainless Steel) 92-7005-12A, 00-.7n r1"1 Bushing 2.4QA 0, &*.!-

,. u .r I us.+/, n.gIII Required Cable V6ctoreen conductors,PVN two50p10d twistedorpairs, substitute wmth two and overall coaxial shield External Pressure Limit 130 osq Storage Temperature -100 to 1ill: -2° o50C O perating Tem perature -0 o1 2 F( 2 °t 0 C Relative Humidity 0 to 95% non-condensing!

operating Voltage 500 - 650 Vdc (supplied by digital ratemeter)

Plateau Lencith 100 - 150 Vdc Plateau Slope:

897A-210, 897A-211 0.1%/V 897A-220, 897A-221 0.2%N 897A-230, 897A-231 0.3%N Dead Time (Approximate) I 897A-210. 897A-211 45 microseconds 897A-220, 897A-221 28 microseconds 897A-230. 897A-231 20 microseconds Measurable Radiation 897A-210, 897A-211 0.01 to 103 mR/h 897A-220. 897A-221 0.1 to 104 mR/h 897A-230, 897A-231 1to 105 mR/h Detector Element Life Exceeds 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> at full-scale Energ De ence of Reading +/-15% from 100 keV to 1.5 MeV Detector Accuracy +/- 20% of actual dose for Cs-137 Radiation Detected Gamma rays. X-rays Soecifications, GM Detector Check Source. Model 897A Series 1-2

Specifications. Detector Preamplifier (Integral)

Input Impedance I_>100 k-ohms _,_ _

Output Impedance 50 ohms Output Pulse Polarity Positive Output Signal (50 ohm terminated) +5 Vdc square-wave Low Voltage* +15 Vdc (Optional +10 Vdc is Jumper Selectable)

Power Requirements +15 Vdc @ 20 mA Maximum Cable Length 2000 feet Electronic Exposure Life Approximately 0 rads Discriminator Level Adjustable from 0 to +2 Vdc (nominal value = 0.5 Vdc) -. ..

Anti-Jam Level Adjustable from 0 to +3 Vdc Anti-Jam Oscillator Frequency Approximately 50 kHz .

Pre-divide' Jumper Selectable Analog & Digital Monitor Divide by 2, Square wave output Configuration I Optional Monitor Configuration Raw pulse outout.

• Preamplifier low voltage and pro-divide are selected with jumpers. - Refer to the preamplifier circuit description for more Information. Standard Configuration for a 955A system is +15 Vdc, Divide by 2.

System Part Number De, scriDtion -- -

-955A-XX' (YZ Range I Material I Power I Detector "

10 0.01 to 1E3 mR/h:Aluminum, 120 Vac, 897A-210 20 0.1 to 1E4 mRFh, Aluminum, 120 Vac, 897A-220 .

• :_ -30 - 1.0 to 1E5 mR/h; Aluminum, 120 Vac, 897A-230 11 0.01 to 1E3 mR/h, Stainless Steel, 120 Vac, 897A-211 21 0.1 to 1E4 mR/h, Stainless Steel, 120 Vac, 897A-221 31 1.0 to 1E5 mR/h, Stainless Steel, 120 Vac, 897A-231.

YY= Local Alarm Option, P/N I Description I Voltage / Range i Material 00 No local alarm 10 Model 958A-40, Local Alarm / No Indicator, Painted-Steel 20 Model 958A-X0, Local Alarm / Meter, Painted Steel 30 Model 958A-41, Local Alarm / No Indicator, Painted Steel 40 Model 958A-X1, Local Alarm , Meter, Painted Steel Z =

Special Options I Modifications Blank 110 Vac 1 220 Vac (future)

MX Special Modifications (X = the modification number)

Detector Part Number Description Y=O, Altumnum Ibusng Y = 1, Sta dessStecl--+busing X =I1 001 rnR/h*-IEB mR/h "

X=Z X 0.10 nR/h-IE4mR/h X=3, 1.D mPRh-IFE5 mRPh

-2 "High ieliabil ity components for Cl ss 1E r- rvi or

-PRODUCT SERIES",

897 = Sr-90 check source (NRC license required) with a-120 VAC solenoid actuator. No longer Manufactured.

897A = CI-36 check source (exempt quantity) with + 15 VDC meter movement actuator.

1-3

Readout Part Number Description 956A-20X-Z BlaIk =Standard thit Z = Spcci a Options/Modi ficat ions ZX= Specia] todi fMcatbn (X= Modifican on Number) 00 = 120 Vac Check Sourc -echanical ( El scont hued 9'95) 01 = 12 Vdc Check Source Mechanical (curn :nt product confgurat on)

OX= Fintur Variations 2 =High reliability components for Class IE mrvice PRODUCT SERIES 956 = 16k PROM, 8k RAM; V-Channel front panel - No longer manufactured 956A = 32k PROM, 8 k RAM, 64 bytes EEPROM; flat front panel revised rear panel pinouts.

1000.

0e 100 I.

(n, 0

Co 10 0

1

.)

CD U) In U) In L0) Ln LO in U) lU) 0 N IT 0 a) 0 N co IL I, In In U) 0 0 '0 '0 HIGH VOLTAGE (VOLTS)

Figure 1-1. Detector Plateau (typical) 1-4

Specifications Model 956A-201 General specifications for the 956A-201 UDR are listed below.- The 956A-201 is designed for applications, and anAy repairs to it by Dersonnel-not 'qualified-may void the nuclear 'rating.nuclear If a problem develops, -the UDR can either be returned to the factory for service, or. repaired by a aualified technician.

Main Display Five segment - three digits with backlighted radiation units display, f,_ _ " - I_____

__I-___ and floating decimal point ....

Bargraph Display -2 6 (Dynamic Range) - Three segments'per decade, 10- to10 mR/h (24 segments)

(green for norm, amber for warn, and red for hichl' Alarm Indicators HIGH Alarm (Red LED) - Flashing until acknowledged WARN Alarm (Amber LED) - Flashing until-acknowledged FAIL Alarm (Red LED) - Does not flash, automatically resets

- -, -" RANGE Alarm '(Red LED),'overrange/underrange - Does not flash,

- automatically resets Display Selection HIGH, High Alarm Setpoint (Momentary Pushbuttons) WARN, Warn Alarm Setpoint Check Source Activates radioactive Check source and associated green LED

--- indicator.' Momrientary, non-latching pushbutton operation Alarm Ack. , Alarm acknowledgment causes alarm indicators to go to a steady on state after acknowledgment. Relays will reset when radiation level drops below setpoint. Internal jumper causes alarms to be reset automatically when radiation level drops below setp6int (no operator input required) .II-, ,

Power ON/OFF Alternate action pushbutton for AC power. .

Relay Outputs - . HIGH Alarm - 1 set DPDT rated 5 A @ 120 Vac (one set 120 Vac (Fail-safe operation) powered for use with optional local alarm) - * "

WARN Alarm - 2 sets DPDT rated 5 A @ 120 Vac

- - FAIL Alarm - 2 sets DPDT rated 5 A'@ 120 Vac DC ratinq for all relays is 5A @ 29 Vdc High Voltage Output 300 Vdc - 1800 Vdc @ 0.4 mA Detector Check Source +15 Vdc @ 20 mA Power Analog Outputs 4 to 20 mA (2) (500 fl load each, max.) and 0 to 10 Vdc (1 KS1 load min.), logarithmic., May be scaled for any one decade (minimum) or to the full range of the detector (maximum).

Remote Alarm Ack Input Optically isolated DC input Detector Input - Digital Pulse, Up to 2000 feet from UDR, 50 ohm input impedance UDR Electronic Accuracy +/-1 digit (+/- 1% of the displayed value, exclusive of the detector energy response Dimensions 3.5 in. x 5.6 in. x 13.5 in.

(HxWxD) (8.9 cmx 14.2 cmx34.3 cm)

Weilht Approximately 3 7 lb. (1.67 kg)

Power 120Vac +/-10%, 50/60Hz, 28 watts (240 Vac optional)

Operating Temperature 32 F to 122 F(0 C to + 50 C)

Relative Humidity 0 to 99% non-condensing Compatblepi't itr I O 7A o... ,e .... ..

,,%t'SedeII , GmMiLeler MLIeIIer tlthel -

Heat Load S....

inn i*

I A n 13I U- r I- , '

llrlOPP.r on-,* w ^ iv. Z0 DI 1I1I 1-6

Universal Digital Ratemeter, Model 956A-201 The Victoreen Model- 956A-201 Universal Digital Ratemeter (UDR), when connected to a Victoreen Model 897A-2XY Geiger-Mueller (GM) tube detector, comprises a

over a five decade range. The UDR provides display, control, monitoring system which operates and annunciation functions for the monitoring system, and will display readings in the range of 0.01 to 101 mR/h. Refer to Figure 1-2 for view of the 956A-201 front panel.

Standard features for the instrument consist of a three digit display of the radiation value and a multi colored bargraph indicator which covers the entire range of the UDR. The bargraph will change color in the event of an alarm condition (green for normal, amber for warning, and red for high). Front panel alarm indicators and rear panel relay outputs for alarm annunciation are also included. Front panel pushbuttons are provided to apply power, display alarm limit set points, acknowledge alarms, and to activate the check source.

Analog outputs of 0 - 10 Vdc (1) and 4 - 20 mA (2) are provided for recording and computer monitoring. The outputs may also be used to drive a remote meter or a local (i.e. near the detector) indicator.

All electronics required to interface with the VICTOREEN 897A series GM detector are included within the 956A-201 UDR. The electronics consist of a high voltage power supply, low voltage DC power supply and the hardware/software required for UDR operation.

overrange indicator to preclude the possibility of on-scale readings The system also includes an when the radiation field is beyond the range of the' detector.

The following paragraphs describe the available options.

A separate manual for each option board is available with more detailed information. Listed below are the option boards currently available.

1. 942-200-75: ANALOG INPUT OPTION BOARD - (Generally not 201 UDR, however, it is used if the UDR is part of a simulator) used for normal operation with the 956A analog inputs. A 0 to 10 Vdc input or 4 to 20 mA input can be Contains four separate channels for selected independently for each channel using the jumpers and switches provided on the board.

Possible inputs to the board include:

temperature, pressure, flow, or simulated radiation.

2. 942-200-80: COMMUNICATIONS LOOP OPTION BOARD - Designed communications link between VICTOREEN's ratemeter and a user to enable a EIA RS232C standard computer baud rates ranging from 50 to 19200 baud. An asynchronous communicationsystem or CRT terminal, with interface adapter is utilized to format the data and control the interface.

The VICTOREEN Communication Loop Option Board also provides an isolated multidrop, senal communications port for interface with a supervisory computer system.

RS-232 format, and utilizes Victoreen's proprietary VICO loop The serial data is in a modified protocol. For maximum external noise protection, a six conductor communications cable is used.

3. 942-200-95: ANALOG OUTPUT BOARD - Designed to provide a user selectable single output voltage of:

0 - 10 Vdc, 0 - 5 Vdc, 0 - 1 Vdc, 0 - 500 mVdc, 0 - 100 mVdc, 0 -

50 mVdc, or 0 - 10 mVdc.

4. 942-200-95M1. DUAL ANALOG OUTPUT BOARD - Designed voltages Output #1 is either 0 - 5 Vdc, or 0 - 10 Vdc, while output to provide two user selectable output

1. 2 is either 0 - 10 mV dc, 0 - 50 mVdc, 0 - 100 mVdc, 0 - 500 mVdc, or 0 - 1 Vdc.

Application The Model 956A-201 UDR is used with all Victoreen 897A series GM Detectors. The detector specific setpoints for the 956A-201 UDR are configured by the user for the range of the particular detector supplied. The detector/preamp, when connected to a UDR, will function as a single channel digital area monitoring system. For additional information on various applications, please contact Victoreen, Inc.; Applications Engineering Group.

1-5

Auxiliary Eguipment Auxiliary Equipment Model DescriptionT.

Model 848-8 Field Calibrator (100 mCi)

-Model 848-8B Field Calibrator (20 mCi)

Model 848-8-105 897A Adapter (all types)

Model 848-8-400 897A Stainless Steel Detector

__.. .. .. .... ____ Adapter, 897A-2x1, Model 942TS UDR Test Set Model 958A-40 Local Alarm; without meter Model 958A-10, -20,- -30 Local Alarm, with meter

.Model 948-1 Rack Chassis

-Model 948A-2 BlankPanel Model 948-3 2 Table Top Enclosure Model 948-10 Panel Adapter

- Model 50-100 Interconnecting Cable kRA_

mRA,

• Th"-HIGH WARN' 10 -02~- 0-*.~i~i Figure 1-2. Front Panel, Model 956A-201 Universal Digital Ratemeter (not to scale)

For a view of the rear panel, refer to drawing 942A-100-30, located in Appendix B.

956A-201 Modifications A number of application specific modifications to the 956A-201 Universal Digital Ratemeter are available for customer use. For further information contact Victoreen, Inc.

1-7

Recommended Spares Table 1-2 lists the recommended spare parts for the 955A Radiation Monitoring System.

Table 1-2. Recommended Spare Parts List 897A Detector Part Number Description Used On 857-210-20 GM Tube Assembly, Low Range 897A-210 857-220-20 GM Tube Assembly, Medium. Range 857-230-20 897A-220 GM Tube Assembly, High Range 897A-230 857-211-20 GM Tube Assembly, Low Range, Stainless Steel 897A-2-11 857-221-20 GM Tube Assembly, Medium Range, Stainless Steel 897A-221 857-231-20 GM Tube Assembly, High Range, Stainless Steel 897A-231 857-210-30 Check Source Assembly, 3 6 CI, 8i.Ci 897A-2XX 46-77 "O"-Ring, Detector Housing 897A-2X0 857-211-15 Gasket, Detector Housing 897A-2X1 857-211-19 Mounting Strap 897A-2X1 857-211-18 Detector Mounting Bracket 897A-2X1 897A-210-10 Printed Circuit Board Assembly All 956A-201 UDRAl Part Number Description Used On 956A-100-20 Front Panel Assembly Q9-7097.-1A I ,

All Cn '^ .. -.

, , 2 Amp, main AC power All 19-62 Fuse F1, 50 mA, anti-jam circuit All 92-9042-A Jumper Block (10 required) All 67-80-37P Receptacle, P1, I/O, 37 Pin All 67-80-14S Receptacle, P2, Detector, 14 Pin All 67-80-4P Receptacle, P3, Power, 4 Pin All 92-9106-A MHV Bulkhead Receptacle. P4, HV All 92-9074-A BNC Bulkhead Receptacle, P5, Signal All 68-15 Receptacle, P6, Aux., 24 Pin 68-15 All Receptacle, P7, RS 232 Optional 942A-100-4 Mating Connector Kit 942-200-50 All Power Supply All 942-100-70 Relay PC Board Assembly All 82-73-1 Relay 942-200-60 All H.V. PC Board Assembly All 1-8

Section 2 - Receiving Inspection and Storage Receiving Inspection Upon receipt of the unit:

1. Inspect the carton(s) and contents for damage. If damage is evident, file a claim with the carrier and notify the Victoreen Customer Service Department.

VICTOREEN, Inc.

6000 Cochran Rd.

Cleveland. Ohio 44139 Phone: (216) 248-9300 Fax: (216) 248-9301

2. Remove the contents from the packing material.

3. Verify that all items listed on the packing list have been received and are in good condition.

NOTE If any of the listed items are missing or damaged, notify the Victoreen Customer Service Department.

Storage Storage of Victoreen instruments must comply with Level B storage requirements as outlined in ANSI N45.2.2 (1972) Section 6.1.2(.2). The storage area shall comply with ANSI N45.2.2 (1972) Section 6.2 Storage Area, Paragraphs 6.2.1 through 6.2.5. Housekeeping shall conform to ANSI N45.2.3 (1972).

Level B components shall be stored within a fire resistant, tear resistant, weather tight enclosure, in a well ventilated building or equivalent.

Storage of Victoreen instruments must comply with the following:

1. Inspection and examination of items in storage must be in accordance with ANSI N45.2.2 (1972) Section 6.4.1.

2. Requirements for proper storage must be documented and written procedures or instructions must be established.

3. In the event of fire, post-fire evaluation must be in accordance with ANSI N45.2.2 (1972),Section 6.4.3.

4. Removal of items from storage must be in accordance with ANSI N45.2.2 (1972), Sections 6.5 and 6.6.

1

(BLANK PAGE) 2-2

Section 3 - Installation Installation Installation consists of selecting suitable mounting sites for the detector and ratemeter, equipment, making the required electrical connections, and entering the desired mounting the set points.

Installation drawings are provided in Appendix B of this manual.

CAUTION t7 Remove all power prior to installing the UDR or detector..

GM Detector Mounting The 897A series GM detectors can be mounted to any suitable structure e.g. a wall or post, using the mounting bracket (PIN 843-6-26) included with the detector. The maximum distance between the detector and ratemeter is 2000 feet (610 meters). The detector should be mounted-above normal head height with the detector connector facing'away from-the area being monitored. For additional information refer to the applicable 'engineering drawings, provided in Appendix B, for detector mounting dimensions. .

,GM Detector Setup The low voltage power supply input for the preamplifier is jumper selectable. This allows the either a +10 use of Vdc or +15 Vdc supply for detector power. If the detector is used in a 955A system, the standard +15 Vdc position is used. If the detector is used in a analog radiation monitoring system, the +10 Vdc position is used. Jumper configurations are listed in Table 3-1. ,

- Table 3-1. Input Voltage Jumper Position Jumper Position Input Voltage J3 AB +15 Vdc (factory set). digital readout J3 BC +10 Vdc, analog readout I The GM tube output pulse is conditioned with a divide by 2 pulse shaping circuit to transmit a square wave from the detector. The conditioning also permits use of the detector with analog readouts, using a diode pump counting circuit. For use with fast rise time scalers, a jumper is provided to output the detector pulse directly. Jumper configurations are listed in Table 3-2.

Table 3-2. Divide Options Jumper Position' Jumper Position Divide Option J1. J2 AB 2, square wave output (factory set)

J1.-J2 BC 1; direct coupled UDR Mounting

'The UDR is a self contained unit which can be mounted in four different way's.

-... CAUTIONT -.

When installing the UDR in enclosed panels or cabinets, ensure that the maximum operating temperature (1220 F) is not exceeded. The-total heat load should be calculated to determine -whetheir- cooling by natural convection or forced ventilation (iLe. fans) is required.,- The heat load for a single UDR is approximately 96 BTU/hr. - -

3-1

NOTE Where more than four units are to be mounted in a cabinet, it is recommended that the center position in each chassis be left blank to facilitate the flow of cooling air through the cabinet.

NOTE For seismic applications, the rear of the chassis must be supported, or the sides of the chassis must be fastened together. For further Information, contact Victoreen.

1. The first mounting utilizes a 19 inch rack chassis adapter, Victoreen Model configuration requires 3.5 inches of rack height and can be used to mount 948-1. This up to three UDRs side by side. A blank filler panel, Victoreen Model 948A-2, is available to cover unused mounting positions. Refer to drawing GEL-948-1 for mounting-dimensions.

2. The second mounting consists of a single channel table top enclosure, Victoreen Model 948-3.

Dimensions for the enclosure are 4.5 inches high by 6.8 inches wide by 14.9 inches deep.

Refer to drawing 948-3-5 for mounting dimensions.

3. The third mounting consists of a panel mount enclosure, Victoreen Model dimensions for this enclosure are 3.75 inches high by 6.45 inches wide, 948-9. Cutout dimensions for the enclosure are 4.0 inches high by 6.7 inches wide by 13.7 the outside inches deep.

Refer to drawing 948-9-5 for mounting dimensions.

4. The fourth mounting utilizes the Victoreen Model 948-10 Rack Chassis Adapter 956A-201 UDR into an existing Victoreen analog ratemeter rack chassis such to mount a the Victoreen 842 series analog ratemeter. Refer to drawing GEL-948-10 as those used for for mounting dimensions.

The UDR is simply inserted into the selected mounting enclosure and secured using the front panel pawl fastener.

Electrical Interface 11WARNING I Ensure all power is off prior to connecting the field wiring Electrical interconnections at the detector are made via the mating "MS" style connector supplied with the detector and loop drawing 956A-201-106.

Electrical interconnections to the UDR are implemented with the mating connector 4 (supplied with the readout) by using the connector input/output assignments kit, P/N 946A-100 provided through 3-10, and loop drawing 956A-201-106, provided in Appendix B. Termination in Tables 3-3 coaxial connections can be found in Appendix D. A service loop of approximately instructions for should be provided to permit partial withdrawal of the UDR for setpoint 12 to 16 inches adjustment and troubleshooting.

Connector pins should be soldered to the cable, using 60/40 tin/lead resin core solder and a soldering iron of 50 watts or less.

Table 3-3. Rear Panel Connections 3-2

Table 3-4.- Connector P1 - Input/Output Pin Signal Internal Connection 1 Spare Relay Board K1-A 2 Spare Relay Board K1-B 3 Spare Relay Board KI-C 4 Spare Relay Board K1-D

-5 Spare ' Relay Board K1-F 6 Spare . Relay Board K1-E' 7 Fail Relay, common Relay Board K3-A 8 Fail Relay, n.o. Relay Board K3-B -

9 Fail Relay, n.c. Relay Board K3-C

" 10 Fail Relay, common Relay Board K3-D 11 Fail Relay, n.o. Relay Board K3-F 12 Fail Relay, n.c. Relay Board K3-E 13 -Warn Relay, common Relay Board K4-A 14 Warn Relay, n.o. , Relay Board K4-B 15 Warn Relay, n.c. - - Relay Board K4-C 16 Warn Relay, common Relay Board K4-D 17 Warn Relay, n.o. -. - Relay Board K4-F 181- Warn Relay, n.c. Relay Board K4-E 19 Alarm Relay, common - - Relay Board K5-A 20 Alarm Relay, n.o. Relay Board K5-B 21 Alarm Relay, n.c. - Relay Board K5-C 22 Spare - Not Used

23. Spare - .. Not Used -. .

24 Spare ... .. Not Used 25 + Remote Acknowledge, Main Circuit Board J9-1 26 Remote Acknowledge Main Circuit Board J9-2 27 - 37 Spare Not Used n.o normally open, n c = normally closed, Relays shown in shelf, or de-energized state.

Table 3-5. Connector P2 - Detector Connector.

Pin .. Signal - Internal Connection "1 - Detector +15 Vdc Supply Power Supply +15 Vdc 2 -Not Used -- Power Supply -15 Vdc 3 Supply Ground -- Power Supply Ground

- +-15 V C/S On. Relav K2 5 - 15 V C/S Off .- Relay 12

... Not Used 7 - - Not Used

-8. Not Used 9 Not Used 10 0 - 10 Vdc' Main Circuit Board J5-10 *

"-11 Ground Main Circuit Board J5-9 12 Not Used -

-13 . 120 Vac (Neutral) 120 Vac (N) .

-- 14 -. Alarm N.C (Switched Line) Relay Board K5-E (L) 0 - 10 Vdc selected for-customer use on'P2 (10,11) or P6 (5, 6),- not both.-

3-3

Table 3-6. Connector P3 - Power Input Pin Signal Internal Connection 1 120 Vac, Line Une fuse (F2) 2 120 Vac, Neutral Power Supply, 120 Vac (n) 3 Safety Ground Chassis Table 3-7. Connector P4 - Detector High Voltage Pin Signal Internal Connection MHV Detector High Voltage Direct Table 3-8. Connector P5 - Detector Signal Input Pin Signal Internal Connection BNC Detector Signal Direct Table 3-9. Connector P6 - Auxiliary I/O Pin Signal 1 4 - 20 mA Output #1 (+)

2 4 - 20 mA Ground (-)

3 4 - 20 mA Output #2 (+)

4 4 - 20 mA Ground(-'

5 o - 10 ()

6 Ground 7 Analog Output Option (+)

8 Ground (-).

9 through 24 Not Used 10 Vdc selected for customer use on P2 (10,11) or P6 (5, 6), not both.

Table 3-10. Connector P7 - RS232C Option Table 3-11. 897A Detector Connection 3-4

Set-up, Table 3-12 summarizes the jumper selectable configuration options. To place the system in operation, the following steps should be performed:

NOTE Ensure you have read and fully understand section 4 prior to continuing.

1. Verify that jumpers and DIP switches, on the UDR and detector, are set for the operational features desired. Refer to Section 4, Table 4-2. The 897A Detector jumpers are preset at the factory per Tables 3-1 and 3-2, and should not be changed.

2. Apply power to the unit. The bargraph will illuminate, followed with a display of 0.- - 0.-. The unit will then begin to display the ambient radiation at the detector location.

NOTE The default setpoints in the UDR memory are for an 897A-22X detector (0.10 mR/h to IE4 mR/h), verify the appropriate setpoints for the actual detector are entered per section 4 (Parameter Entry).

NOTE Calibration constant and detector deadtime value are obtained from the factory calibration data sheet for each detector.

3. Detector dependent set points such as analog outputs, High/Low scale values, Range, Underrange, Overrange limit, calibration constant, and detector deadtime may now be verified and if required, modified using the procedures outlined in Section 4.

4. Channel dependent setpoints such as alarm limits may be verified, and if required, modified using the procedures outlined in Section 4.

5. Electronic adjustments affecting calibration are factory set and should not be readjusted for initial operation unless the UDR has been in storage for more than one year. If the Unit has been in storage for more than one year, the electronic calibration described in Section 6 should be performed.

Table 3-12. Model 956A-201 Option Jumpers Jumper Function Position Operation JP1 Microprocessor Reset Out Normal Operation (factory) Momentary connect to reset microprocessor without cycling AC power IN Not Apolicable JP2 PROM Type 1-2 PROM 27128 2-3 PROM 27256 (factory)

JP3-1/JP3-2 Statistical Accuracy (Note this Out / Out 2% Accuracy - 9604 Target Counts accuracy refers only to the statistical Out / in 5% Accuracy - 1537 Target Counts interpretatuon of detector counts, and In I Out 10% Accuracy - 384 Target Counts not detector accuracy) In / In Fixed one second disDlav update (factory)

JP3-3 Alarm Acknowledge In Manual Acknowledge (factory)

Out Automatic JP3-4 Fail Alarm In Enable No Counts Fail Alarm (factory)

Out Inhibit No Counts Fail Alarm JP3-5 Check Source Alarm In Alarm Inhibited (factory)

Out Alarm Enabled JP4 Input Pulse Selection 1-2 Negative Input Pulse (Other Detectors) 2-3 Positive Input Pulse (GM Detectors) (factory)

JP5 Shield Polarity Selection 1-2 Shield for Negative Pulse 2-3 Shield for Positive Pulse (GM) (factory)

JP-6 Anti-Jam Fuse Selection 1-2 Enable for Normal Operation (factory) 1 2-3 Anti-Jam Circuit fuse bypassed (testino)

JP7 Detector Type for Anti-Jam 1-2 Scintillation Circuit Timing 2-3 GM Tube (factory)

I Out Anti-Jam Circuit Disabled (for testing only) 3-5

(BLANK PAGE) 3-6

Section 4 - Operation/Functional Description Operation This section describes the operation and set up of the Model 955A-XX Digital Area Monitoring System. The system consists of a Model 956A-201 UDR and a Model 897A series GM Detector.

The detector preamplif ier provides the electronics interface between the detector and the UDR. The preamplifier provides input pulse ,discrimination,' ýpredivide '-capability, anti-jam circuitry, pulse amplification and output drive capabilities.- The output'of the preamplifier is transmitted to the UDR.

The 956A-201 UDR uses this information'to generate the dose-rate display, error codes, alarms, and analog outputs. , * ,

Operation of the 956A-201 UDR consists -of-operator functions and configuration functions. All operator functions are performed using the front panel shown in Figure 4-1. Configuration functions are performed using internal switches and/or-jumpers, which arei accessible with partial removal of the UDR from the mounting enclosure. Calibration involving trimpots is described in Section 6.

Detector Operation, Model 897A-2XX The Model 955A Area'Monitor uses a Model 897A-2XX GM tube as a gamma radiation detector.

The tube is filled with a mixture of gases, one of which acts'as a qtienching agent, while- the others

-tend to support ionization.' Electrically, It consists of a positivd electrode (ainode), which is rmaintained at a steady potential of 500/650 Vdc and a negative electrode (cathode) which is near ground potential.

When a gamma photon penetrates the shield encasing the GM tube, an ionizing event occurs. An ion pair is produced, triggering an avalanche 'of ion pairs. The cuftent pulses 'produced.(one pulse per ionizing event)-are independent of the energy of' the initiating particle. Multiple discharge, caused by the ,release of electrons from the cathode due to excess energy, is eliminated 'after a short time (called dead time, typically 20-45 microseconds) by a quenching gas within the tube. The resulting pulses are conditioned and transmitted to the preamplifier. -'

Thb integral detector preamplifier provides input pulse 'discrimination and amplifies pulses received from the GM tube to a 5 Vdc amplitude. The current drive output of the pre'amplifier willidrive a signal up to 2000 feet through a 50 ohm transmission line, without signal degradation.

Should a very high intensity radioactive source be detected, the GM tube may become saturated (i.e. pulses are separated by a period less than the dead time of the tube). This would have the effect of holding the preamplifier output at a relatively constant output voltage, resulting in count loss at the readout. Anti-Jam circuitry in the preamplifier produces a full scale output square wave signal, providing a full scale indication at the readout.

4-1

GM Detector Response Time The response times for a change in reading within the same decade are listed in Table 4-1.

Table 4-1. Response Time RANGE RESPONSE TIME 0.01 to 0.1 mR/h 60 seconds 0.1 to 1.0 mR/h 60 seconds 1.0 to 10.0 mR/h 60 seconds 10.0 to 100.0 mR/h 60 seconds 100.0 mR/h to 1.0 60 seconds R/h 1.0 to 10.0 R/h 60 seconds 10.0 to 100.0 R/h 60 seconds The response time of the system to a step change in radiation value is 60 seconds, due to the operation of the pulse counting algorithms. The detector radiation value displayed is the result of a rolling average of the latest 60, one second values, and is updated once per second. An alarm will be initiated within one second after the current one minute average exceeds the alarm setpoint.

Check Source A manual check source may be initiated from the UDR by the operator to check detector operation.

The Check Source push-button is a momentary contact switch, and is active as long as the push button is depressed. Upon removal of the check source request, the internal counting registers are cleared and the display value will slowly, within 1 minute, ramp up to the actual average radiation value. This is due to the action of the averaging algorithm in the UDR firmware. During check source activation, analog outputs are muted (forced to zero). The High and Warn alarms are normally inhibited during check source operation, but may be enabled by removing Jumper JP3-5, on the UDR main printed circuit board (see Table 3-12).

4-2

UDR Operation. Model 956A-201 Operation of the 956A-201 UDR'consists of'operator functions :and configuration functions. All operator functions are performed using the front panel. Configuration functions are performed using internal switches and/or jumpers which are accessible via partial removal of the UDR from the mounting enclosure.

General Information-n Normal Operation ....

If the measured radiation field is within the range of the~detector during power-up, the mR/h value will be displayed as a three digit number: N.NN, where N = 0 to 9. A backlit insert will display engineering units in mR/h, R/h, or kR/h. The bargra-ph Will display the value on the fixed'mR/h scale and any indicator lights which are on should be green, providing the operator with a visual indication of normal operation. The -analog outputs will track the displayed value, and the alarm outputs will be, active.

The Warn, High, and Fail relays operate in the Fall Safe Mode.

"WARN/HIGH Alarms Ifthe measured radiation field increases above the WARN alarm limit, the WARN alarm indicator will turn on flashing (amber color), the bargraph will change color to amber, and the warn alarm relay will de-activate. Itthe measured radiation field increases above the HIGH alarm limit, the HIGH alarm indicator will turn on flashing (red color), the bargraph will change color to red, and the high alarm

- relay will de-activate.

"NOTE'

. - Non-failsafe relay operation for the HIGH and WARN alarms Is available as an option at time of purchase.

The UDR can be configured to automatically reset the alarm relays and alarm indicators, or -it can hold the alarm,relays de-energized and flash the alarm indicators- until the alarm acknowledge (ALARM ACK) pushbutton is pressed. If the ALARM ACK pushbutton is pressed while'the alarm condition still exists, the indicators will go to a steady state, and the relays will remain de-energized until the alarm condition returns to normal. Upon resumption of normal operation, the relays will energize and alarm indicators will extinguish. The bargraph color will always indicate' the -current status; green for normal, amber for warn, and red for a high alarm.

Front panel pushbuttons labeled HIGH and-WARN can be used to display the respective alarm set points.

'Ranae Alarm If the measured radiation field is below the underrange setpoint (minimum range of the detector used), the front panel display will indicate 0.00 mR/h, the bargraph will indicate the actual radiation value, and the RANGE alarm indicator will illuminate in red. The minimum range is adjustable by the underrange setpoint, and is defaulted to 1.OOE-1 mR/h. When the measured radiation field increases into the range- of the detector, the RANGE alarm indicator will extinguish and normal operation will begin.

3

There are three ranges for the ratemeter, one for each detector range (low, medium, & high). The specific range for each detector is established by operator entered setpoints (refer to uSetpoint Entry" for actual entry procedures). The detector range for each specific detector is shown below.

Detector Detector Range Underrange Overrange Setpolnt Setpolnt 897A-210 / 211 0.01 to 10E3 mR/h 1.OOE-2 1.00E3 897A-220 / 221 0.1 to 10E4 mR/h 1.00E-1 1.00E4 897A-230 / 231 1 to 10E5 mR/h 1.OOEO 1.00E5 If the measured radiation field goes above the overrange set point, the RANGE alarm indicator will Illuminate and the front panel display will indicate EEEEE mR/h, the bargraph will illuminate in red, and the analog output will be set to full scale. The maximum range of the detector used is determine by the overrange set point. When the measured radiation field returns within the maximum operating range of the detector and the condition is acknowledged, the RANGE alarm indicator will extinguish and normal operation will resume. In the event the detector output exceeds the electronic anti-jam circuit trip level, the anti-jam fuse will open and the fail relay will change state to indicate a monitor not in service condition. Replacement of the anti-jam fuse (Fl) will be required in order to return the ratemeter to normal operation.

Fail Alarm Detector failure, detector overrange, or microprocessor failure are some of the conditions which can produce a FAIL alarm and in some cases an error display. The fail condition is true whenever any equipment failure is detected and false when no equipment failures are detected. When a fail condition occurs, other than power failure, the red FAIL alarm indicator illuminates and the fail relay coil de-energizes.

To return the channel to normal operation after a FAIL alarm, the condition which caused the alarm must be located and corrected. Upon correction of the failure condition, the Fail alarm will automatically close.

Check Source The check source pushbutton and electronics are provided to verify detector operation. To operate the check source, press the CHECK SOURCE pushbutton and hold it down. The Check Source LED will illuminate, and the radiation value will increase. Releasing the check source pushbutton will allow normal UDR operation. An internal configuration jumper (JP3-5) allows alarms to be activated or deactivated in the check source mode. The analog outputs are forced to their low scale value during a check source operation.

Firmware Version This system requires a PROM for UDR operation. For the part number and the latest revision of the PROM, see the Factory Test Data Sheet.

4-4

Operational Modes Normal Ooeration. Mode .

The UDR is in normal operation when the UDR function switch is in any position except 8, and the Check Source button is OFF. During normal operation, the display shows the dose rate data received from the preamplifier in mR/h, R/h, or kR/h. The bargraph will also show the dose rate. The color of the Illuminated segments is green when the dose rate is below the WARN setpoint, amber when the dose rate is above the WARN setpoint and below the HIGH-setpoint, and red, when the dose rate is above the HIGH setpoint. The analog outputs are active and all alarms are enabled.

Data EntryMode.

Data Entry Mode is selected by pressing the ENTER pushbutton while'the rotary FUNCTION switch is in a valid setpoint position (see Setpoint Description). The selected setpoint is displayed in

!exponential format -(e.g. 1.00E2) with-the left most digit flashing., Setpoints are entered in

-exponential format (e.g. X.XXEN), where X is the mantissa and N is the exponent.-The XM value may be any integer value between 0 and 9. A positive exponent is entered by selecting -the- E" symbol, and a negative exponent is entered by selecting the "-"symbol. The N valu e may be 'any -integer value between 0 and 9. If the FUNCTION switch is not in a setpoint position, pressing the ENTER button has no effect. Refer to Table 4-3 for FUNCTION switch positions.

1i6 the Data Entry Mode, the bargraph and analog outputs remain'active.

Alarm Inhibit Mode Alarms are inhibited in situations where an alarm trip would be meaningless- because the 'UDR is not in a normal measurement mode (i.e., when the UDR is in the Check Source Mode). 'New alarm trips cannot occur and old alarms cannot be reset. When the inhibit period is over, alarm'trips and resets are enabled again. Alarm inhibit conditions are discussed in the following paragraphs.,'

Check Source Mode The check source pushbutton and electronics are provided to verify detector operation. To operate the check source, press the CHECK SOURCE pushbutton and hold it down. The check source relay will energize, the check source indicator will illuminate (green), and the check source mechanism will expose the check source (sealed capsule of 36Cl) to the Gm tube by positioning the source over an access on the detector printed circuit board. The radiation value will be displayed on the front panel.

Releasing the check source pushbutton will return the source capsule to it's shielded position and extinguish the check source indicator, allowing normal UDR operation to resume. After approximately 60 seconds, the displayed value will indicate ambient radiation. An internal configuration jumper (JP3-5) allows alarms to be activated or muted if alarm limits are exceeded by the check source radiation value.

The bargraph operates normally during Check Source operation.

The front panel Alarm and Warn status indicators are disabled during Check Source operation.

The analog outputs are set to zero (i.e. 4 mA or OV) during Check Source operation.

- 4-5

Calibration (scaler) Mode Ooeration Calibrate mode for the UDR is entered by turning the rotary set point switch to position 8 and pressing the ENTER button.

The current calibration time set point is displayed in seconds, with the first digit flashing to indicate the edit mode. The bargraph will turn off, high and warn conditions will clear, and the radiation unit light (backlights) will turn off. The calibration set point may be edited, but will reset to 60 seconds whenever the unit is turned off or the functional switch is moved from position 8.

Once the desired calibration time is set, momentarily pressing the ENTER button again will start the calibration. The display will go to zero, the units backlight will begin to flash, and the High, Warn, and Fail relays will change state. The UDR will count for the entered calibration time, displaying the current summation of counts each second. When the calibration is completed, the final summation of counts for the calibration time is displayed and the units backlights will be steady on.

Another calibration can then be executed by pressing the ENTER key, and .the system will again display the calibration time for editing. A calibration in process can be stopped by pressing the ENTER key or by moving the rotary switch to a position other than position 8. Once the calibration mode is exited, the UDR will reset and continue normal operation.

NOTE When the calibrate mode is Initiated, the Alarm, Warn, and Fall relays change state to indicate the monitor is in a non-operational state.

The calibration mode can also be entered with the UDR in the check source mode of operation.

Move the rotary switch to position 8 and press the check source button. While holding down the check source button, press the ENTER button to lock the check source on positive when the Check Source button is released. Pressing the enter button again will start the calibration. The check source light will remain on, indicating that the check source relay is energized. The check source condition will clear when the calibrate mode is exited.

NOTE It is recommended that the check source not be left energized for extended periods of time in this mode.

4-6

Z°. *,

The alarm functions provided by the UDR include HIGH, WARN, FAIL, and RANGE., The HIGH, WARN , and FAIL alarms drive relay contact outputs. Some operating modes of the UDR disable alarms. The user is cautioned to read and fully understand section 4.

Alarm Logic Types' Alarm logic defines whether the alarm is reset manually or automatically and whether alarm relay coils are energized or de-energized in normal operation. "

Standard alarm reset logic for the UDR Is manual reset lor the "HIGH and 'WARN- alarrms, ,aud auto reset for the RANGE and FAIL alarm. Failsafe operation is also standard.

Auto reset for the HIGH and WARN alarms may be selected by jumper JP3-3.' .

Manual Reset When an alarm trips, the relay coil goes to its abnormal position.- The indicator flashes until the alarm is acknowledged by pressing the ALARM ACK button on the UDR. The indicator then. remains steady on until the alarm condition becomes false. At that time, the alarm resets by turning the indicator off and returning the contact to its normal position. .

Auto Reset When an alarm trips, the contact goes to its abnormal position.. The indicator goes steady on.

When the alarm condition becomes false, the alarm automatically resets, returns the relay coil to normal position, and turns the indicator off. ' '

Auto reset may be selected for the HIGH arid'WARN alarms by removing jumper JP3-3 from the UDR main board.

Standard relay operation for the UDR Is fail-safe. When the unit is powered, the relay coil energizes.

If power is lost to the relay coil, or an alarm condition occurs, the relay de-energizes, giving a trip indication. This logic provides fail-safe operation for the alarm function.

Non-Fallsafe relay operation for the HIGH and WARN alarms is available as an option.

4-7

HIGH Alarm The HIGH alarm condition is "true" when the display dose rate is greater than or equal to the HIGH alarm set point and "false' for all other conditions.

The standard logic for the HIGH alarm is fail-safe, manual reset.

When the HIGH alarm is tripped, the red HIGH alarm indicator begins flashing, the bargraph goes to red, the HIGH alarm relay coil de-energizes, and the UDR sets its auxiliary output high. When the alarm is acknowledged, the HIGH alarm indicator goes steady on and the UDR sets its auxiliary output low. The auxiliary output on the UDR can be used to drive a remote alarm/alarm indicator.

The HIGH alarm relay will change state (i.e. energize) when the radiation value drops below the setpoint The HIGH alarm is normally inhibited in Check Source mode. By removing jumper JP3-5, the High and Warn alarms may be enabled in Check Source mode.

WARN Alarm The WARN alarm condition is "true" when the display dose rate is greater than or equal to the WARN alarm set point and "false" for all other conditions.

The standard logic for the WARN alarm is fail-safe, manual reset.

When the WARN alarm is tripped, the amber WARN alarm indicator begins flashing, the bargraph goes to amber, the WARN alarm relay coil de-energizes. When the alarm is acknowledged, the WARN alarm indicator goes steady on. With the alarm acknowledged, the relay will change state when the radiation value drops below the setpoint.

The WARN alarm is normally inhibited in Check Source mode. By removing jumper JP3-5, the High and Warn alarms may be enabled in Check Source mode.

4-8

RANGE Alarms The underrange condition is "true" when the dose rate is below the underrange setpoint and "falsen for all other conditions. The RANGE indicator Illuminates, the analog'output is set to zero, and the display reads 0.00 mR/h when the underrange condition is true. The bargraph will operate normally.

The Alarm, Warn, and Fall relays are not affected by the underrange alarm. The -underrange condition clears automatically when the detector output returns within the normal range. 'There is no relay'associated with the UNDERRANGE alarm.

The OVERRANGE is true when the dose rate is greater than or equal to the overrange set point or the Model 897A preamplifier is sending an output pulse greater than the UDR electronics Anti-Jam circuit setpoint. The condition is false when neither of the conditions are true.

When the OVERRANGE ala'rm is active, WARN and HIGH alarms are true, the ,red -RANGE -indicator illuminates, the bargraph Illuminates red, the analog output reads full scale', and the display reads EEEEE. The OVERRANGE alarm setpoint is operator adjustable.

The OVERRANGE alarm must be reset by pressing the acknowledge pushbutton when the overrange condition is false (i.e. radiation level returns to a value below the overrange setpoint). The OVERRANGE alarm will not reset automatically, at a later time, after the acknowledge pushbutton is pressed as it does for the HIGH and WARN alarms.

If auto reset is selected for HIGH and WARN alarms, these will reset automatically, but the overrange display will remain until the acknowledge pushbutton is pressed. In addition, if the detector output is above the electronic anti-Jam circuit threshold, the anti-jam circuit will be activated, opening the anti jam fuse on the UDR. This causes the fall relay to change state, indicating a non-operational mode.

To return to normal operation, the 956A UDR must be powered off, and the anti-jam fuse replaced.

FAIL Alarms Several equipment failure conditions are monitored which produce a FAIL alarm and in some cases an error message. The fail condition is "true" whenever any equipment failure is detected and "false" when no equipment failures are detected. When a fail condition occurs, other than power failure, the red FAIL alarm indicator illuminates and the fail relay coil de-energizes.

The FAIL alarm logic is always fail-safe, auto reset.

The following are the fail alarms included in the 956A-201 UDR:

1. NO COUNT Failure

2. POWER Failure

3. MPU Failure (hardware)

4. Anti-Jam Trip No Count Failure If no pulses are received by the UDR for five minutes, a no count failure is detected. A no count alarm usually indicates a failure in the detector or UDR detector high voltage supply. The UDR display, however, may read zero for five minutes or more without a low signal fail alarm. This is because the preamplifier is reporting a non-zero dose rate that is below the low range value. The No Count failure alarm can be disabled by removing jumper JP3-4 from the UDR main board.

4-9

Power Failure If power is lost to the UDR, the bargraph, alarm indicators, and the display are blanked (turned off).

The HIGH, WARN, and FAIL relay coils de-energize.

MPU Failure If the fall timer circuit, which checks the MPU (main processor) function, is allowed to time out (because of a hardware failure), a failure condition will be indicated.

AntI-Jam Trip Should the detector output exceed the UDR anti-jam circuit threshold, the anti-jam fuse opens and the fail logic will illuminate the FAIL LED, and de-energize the Fail relay.

4-10

Power Up Procedure To place the system in operation, the following steps should be performed:

1. Verify that the UDR configuration jumpers are properly selected. Refer to "Configuration Functions" for addition information if required. -.

2. Verify that the UDR Function switch, located on the front right 'section of the UDR main ,board, is in a position other than 8.

3. Verify that the detector and UDR are properly connected.

4. Apply power to the system. If all connections are good, the UDR will powerup and will begin to monitor the ambient radiation level.

NOTE The appearance of error codes E0002 or E0008 may indicate that the setpoint memory has not been Initialized. To initialize the set point memory'to the default values, power-up'the UDR with the ENTER button held down; (The UDR must be pulled out from its mounting to access the ENTER button).

5. Detector dependent setpoints (i.e. analog output High/Low scale values, range,- un'derrange,

" overrange, calibration constant, detector deadtime) and channel dependent setpoints, (i.e. as alarm limits), may be entered using the procedure described in this section. The UDR contains

- default values for all setpoints to permit power-up prior to'user defined values being entered.

NOTE Ensure the setpoints entered are within the normal range of expected operation before entry, or spurious alarms may be generated.

6. Electronic adjustments affecting calibration are factory set and should not be readjusted for initial operation unless the UDR has been in storage for more than one year. -if the unit has been in storage for more than one year, the electronic calibration described in Section 5 should be performed.

How to Enter Setpoints Available setpoints are listed in Table 4-4. The setpoints are accessed using the Function switch, the Digit button, the Value button, and the Enter button. These are located on the-main printed circuit board of the UDR. The UDR must be pulled about halfway out of-its rack chassis in order to access them. The buttons are on the right side of the main board about two inches behind the front panel.

The function switch is on the right side directly in front of the power supply.

To display a setpoint, rotate the fun'ction switch to one oi th6epositions shown in Table4-4 and press the ENTER button. The setpoint will be displayed in exponential format with the left-most digit flashing. Pressing the ENTER button again enters whatever is displayed into the non-volatile set point memory.

To change a setpoint, the DIGIT button is pressed and released until the digit to be changed is flashing. .Then the VALUE.button is pressed and released until the -desired value appears. This process is repeated for all digits to be changed. The sign of the exponent can assume the values "E" or s-". The former represents a positive power of 10 and the latter represents a negative power.

When all digits and the exponent have been changed to their desired values, the ENTER button is pushed to enter the new value into memory. Setpoint entries not accepted by the UDR are indicated by the error code E0002 being displayed.

Refer to "Table 4-3" for function switch setpoint descriptions.

4-11

Configuration Functions The UDR contains a series of eleven hardware jumpers and nine user specified set points which affect operation of the unit.

The jumpers are designated as JP1 and JP2, JP3-1 through JP3-5, and JP4 through JP7. Refer to the main circuit board assembly drawing located in Appendix B of this manual for jumper locations.

The functions affected by JP1 through JP7 are described in the following paragraphs and shown in Table 4-2.

NOTE The unit must be turned off when changing jumpers.

Microprocessor Reset Jumper JP1 permits local reset of the microprocessor without cycling AC power.

PROM Type Jumper JP2 must be installed in position 2-3 for use with the 27256 PROM installed.

Count Time Selection (Statistical Accuracy)

The user can specify the statistical accuracy of the displayed radiation value with the use of JP3-1 &

JP3-2. This statistical accuracy selection affects count time and consequently, the update time of the display. Refer to Table 4-2 for additional information. The unit is normally shipped from the factory with both JP3-1 and JP3-2 installed Alarm Reset (Acknowledge)

1. JP3-3 OUT - The unit resets alarm indicators and alarm relays after the radiation value falls below the set point without regard to the alarm acknowledge pushbutton.

2. JP3-3 IN - The unit maintains the alarm indicators and alarm relays in the alarm state until the alarm acknowledge pushbutton has been pressed and the radiation value falls below the set point. If the alarm acknowledge pushbutton is pressed while the radiation value is still above the set point, the flashing indicator will go to a steady state ON condition.

The UDR is normally shipped from the factory with JP3-3 installed.

No Counts Fail Alarm

1. JP3-4 IN - The unit will go into a FAIL mode after five minutes with no counts from the detector.

2. JP3-4 OUT - The unit will not go into a FAIL mode when there are no counts from the detector.

The UDR is normally shipped from the factory with JP3-4 installed.

4-12

Inhibit Alarms (Check Source Ooeration)

1. JP3-5 OUT - The alarms will become active during check source operation If alarm limits are exceeded.

2. JP3-5 IN - Alarms are inhibited during' check source operation,' but if the unit is in an alarm condition when the -check source Is activatedIt will remain in the alarm condition.

The UDR is normally shipped from the factory with JP3-5 in.

InDut Pulse Selection . .. - "

Jumper JP4 is set to position 2-3 for GM detector inputs. Position 1-2 is provided for use with other detectors.

Input Shield Polarity Jumper JP5 is set to position 2-3 for GM detector inputs: Position-i is provided for use with other detectors.

Anti-Jam Selection Jumper JP6 is normally installed in position 1-2. Position 2-3 bypasses the anti-jam fuse for test purposes.

Detector TVpe Jumper JP7 is set to position 2-3 for a GM detector input. Position 1-2 is provided for use with a scintillation detector. Removing the Jumper disables the anti-jam circuit for test purposes.

Jumper Selectable Options NOTE The unit must be turned off when changing jumpers.

Table 4-2. Model 956A-201 Option Jumpers Jumper Function Position Operation JP1 Microprocessor Reset Out Normal Operation (factory) Momentary connect to reset microprocessor without cycling AC power IN Not Aphlicable JP2 PROM Type 1-2 PROM 27128 2-3 PROM 27256 (factory)

JP3-1/JP3-2 Statistical Accuracy (Note tius Out I Out 2% Accuracy - 9604 Target Counts accuracy refers only to the stausucal Out / In 5% Accuracy - 1537 Target Counts nt'erpreranon of detector counts, and in / Out 10% Accuracy - 384 Target Counts not detector accuracy) In / In Fixed one second display uodate (factory)

JP3-3 Alarm Acknowleoge In Manual Acknowledge (factory)

Out Automatic JP3-4 Fail Alarm In Enable No Counts Fail Alarm (factory)

Out Inhibit No Counts Fail Alarm JP3-5 Check Source Alarm In Alarm Inhibited (factory)

Out Alarm Enabled JP4 Input Pulse Selection 1-2 Negative Input Pulse (Other Detectors) 2-3 Positive Input Pulse (GM Detectors) (factory)

JP5 Shield Polarity Selection 1-2 Shield for Negative Pulse 2-3 Shield for Positive Pulse (GM) (factory)

JP-6 Anti-Jam Fuse Selection 1-2 Enable for Normal Operation (factory) 2-3 Anti-Jam Circuit fuse byoassed (testing)

JP7 Detector Type for Anti-Jam 1-2 Scintillation Circuit Timing 2-3 GM Tube (factory)

I Out Anti-Jam Circuit Disabled (for testing only)

,4-13

UDR Function Switch I Function Table 4-3 shows the UDR Function Switch positions and the function.

Table 4-3. UDR Function Switch Positions/Function Switch Position Function 0 Selects HIGH Alarm Setpoint 1 Selects WARN Alarm Setocint 2 Selects Resolving Time Detector Dead Time 3 Selects Analog Full Scale Limit 4 Selects Overranae Limit 5 Selects Conversion Constant 6 (Not Used) 7 Selects Analog Low Scale 8 Selects Calibrate Mode 9 Selects Underrange Value 4-14

Parameter Entry Parameter entry is accomplished using an sixteen position rotary switch labeled FUNCTION and three momentary pushbutton switches labeled ENTER, VALUE, and DIGIT. These switches are located on the right side of the main circuit board and are accessible by partially removing the unit from It's mounting case.

"The FUNCTION switch is used to select the parameter to be entered. 'Table 4-4 defines the switch positions and a description of each parameter can be found In the following paragraphs.

Table 4-4. Function Switch Entry Parameters Switch Set Point Units Detector Detector. Detector Default Position 897A-21X 897A-22X 897A-23X Value 0 High Alarm Limit mR/h ...... 1.00E3 1 Warn Alarm Limit mR/h ...... 1.00E1 2 Resolving Time (Dead minutes O.OOEO Time) 3 Analog Full Scale Value mR/h 1.00E3 1.00E4 1.00E5 1.00E4 4 Overranae Limit mR/h 1.00E3 1.00E4 1.00E5 - 1.00E4 5 Conversion Constant mR/h / CPM - ..... _-_ 1.OOEO 6 Not Used N/A Not Used - Not Used Not Used Not Used 7 Analog Low Scale Value mR/h -* 1.OOE-2 1.OOE-1 1.OOEO 1.OOE-1 8 Calibration Mode/Time seconds ...... _6.OOE1 9 Underrange Limit mR/h 1.00E-2 1.00E-1 1.OOEO 1.OOE-1 A through Not Used

• Detector unique, provided with the detector/detector calibration sheet.

" User Selected (detector range dependent).

To enter a parameter, the FUNCTION switch is set to the desired position and the following steps are performed:

NOTE In the event It is necessary to re-enter all of the default setpoints, the UDR EPROM memory may be reinitialized by turning the UDR

,- power off, then depressing the ENTER pushbutton at the same

,- time the power on switch is depressed. Releasing 'the ENTER pushbutton and momentarily depres'sing the ENTER pushbutton again to -exit the setpoint entry mode and return" to normal operation.

1. Press the ENTER pushbutton. The current value of the parameter, 'selected by the FUNCTION switch will be displayed on the front panel. The leftmost digit of the value will be flashing. The value is displayed in the format shown below.

" -- M.MMEN" This format expresses the form of M.MM x EN, where M is a whole number from 0 to 9, E designates a positive exponent, and N represents the exponent value from 0 to 9. A negative exponent is expressed as a minus ( - ) character in the E position.

2. The value of the flashing digit can be incremented by pressing the VALUE pushbutton.

3. The flashing digit can be moved one place to the right by pressing the DIGIT pushbutton.

4. When the desired value -has been entered into the display, pressing the ENTER pushbutton causes the displayed value to be entered into memory for permanent storage. The new parameter value is now effective..

4-15

Setooint DescriotIons High Alarm Limit, Setpoint 0 This setpoint is entered in units of mR/h in the exponential format X.XXEN. The high alarm limit set point can be set to any value desired. When the display value exceeds this limit, the UDR will go into a HIGH alarm state. The HIGH alarm limit must be greater than or equal to the WARN alarm and the underrange limit. It must be less than or equal to the overrange limit.

Warn Alarm Limit, Setpoint 1 This setpoint is entered in units of mR/h in the exponential format X.XXEN. The warn alarm limit set point can be set to any value desired, but must be lower than the high alarm limit set point. When the displayed value exceeds this limit, the UDR will go into a WARN alarm state. The WARN alarm limit must be greater than or equal to the low scale value and less than or equal to the HIGH alarm limit.

Resolving Time (Dead Time), Setpoint 2 This setpoint is entered in units of minutes per count. The actual value to be entered is a function of the individual detector and is stated on the calibration data sheet supplied with the detector. If a complete system is purchased (i.e. 955A-100), this setpoint is entered at the factory.

Analog Full Scale Value, Setpoint 3 This value is the dose rate at which the analog output is set to full scale (i.e. 10 volts or 20 mA). This value must be an even power of 10 that is at least 1 decade higher than the analog low scale value.

An even power of 10 is a number of the form 1.00EX, where E indicates a positive exponent, a (-)

sign indicates a negative exponent, and X equals 9. This parameter is entered in units of mR/h and sets the upper value of the analog outputs. This value must be set to exact decade values.

Example: 1.00E4 is acceptable, 2.00E4 is not.

Overrange, Setpoint 4 This setpoint is entered in units of mR/h. It is normally set for the upper limit value of the detector used (for the 897A-210 it is 1.00E3, for the 897A-220 it is 1.00E4, and for the 897A-230 it is 1.00E5). When the measured radiation value exceeds this set point, the unit goes into a range alarm state. The overrange limit must be greater than or equal to the HIGH or WARN setpoints.

Conversion Constant, Setpoint 5 This setpoint is a detector dependent value which is used to convert the detector output, counts per minute (CPM) to mR/h. The actual value to be entered is stated on the detector calibration data sheet. The units are mR/h per counts per minute. If a complete system is purchased (i.e. 955A 100), this setpoint is entered at the factory.

4-16

Analog Low Scale Value, Setpoint 6 This value is the dose rate at which the analog output is set to low scale ,(i.e. 0 volt or 4 mA). This value must be an even power of 10 that is at least 1 decade lower than the analog full scale value.

An even power of 10 is a number of the form 1.00EX, where X equals -9 to +9. This parameter is entered in units of mR/h and sets the lower range of the analog outpLits. This-value must be set to "exact decade values. Example: 1.OOE-1 is acceptable, 2.O0E-1 is not.

Calibrate Mode, Setpoint 8 This function permits use of the UDR as a scaler, by entering a fixed counting time, and displaying the integrated counts during this period. The units are entered in seconds.

Underrange Limit, Setpoint 9 This setpoint is normally set to the low range limit of the detector used, and is entered inmR/h. The underrange limit must be less than or equal to the HIGH and WARN limits. Note the radiation display will be 0.00 for dose rates under the underrange limit. When the measured radiation value is less than this value, the unit goes into a RANGE alarm state.

Set Point Error Codes If, after entering a setpoint or upon power-up, an error code is displayed, It may be due to incorrect setpoints. If error code E0002 or E0008 is displayed, all alarms are inhibited. Refer to Table 4-5 for a listing of error codes.

Code E0001 indicates that the display value is negative. Usually this means that the setpoint PROM is bad or needs to be initialized. To initialize the setpoint memory to the default values, power up the UDR with the ENTER button held down. If initializing the setpoint memory does not help,' then the setpoint PROM is defective or there is a hardware malfunction.

Code E0002 indicates that a setpoint entry error has occurred (e.g. High alarm setpoint is set above the overrange value). All setpoints should be checked for agreement with the setpoint'descriptions.

The appearance of either code may also indicate that the setpoint memory has not been initialized.

Refer to code E0001 above...

Code E0007 indicates that the specific function is not implemented, and that no setp6int may be entered.

Code E0008 indicates that the analog output setpoints are invalid.

Code EEEEE indicates that the monitored radiation field is greater than the maximum' range of the detector.

Error codes are cleared automatically when the initiating event is corrected.

Table 4-5. Model 956A-201 'Error Codes Error Codes Function E0001 Negative disolay data E0002 Invalid setooint value (s)

E0007 invalid Function E0008 Invalid analog scale values EEEEE Overrance Condition -

4-17

AnalogQuItu The analog outputs are a logarithmic function of the current UDR reading. The outputs are scaled by the Full Scale Value and Low Scale Value, positions 3 and 7 respectively of the FUNCTION switch.

An 8 bit DAC is used to convert the displayed dose rate to a 4-20 mA or 0-10 Vdc output on connector P6 (on the rear panel). Output current or voltage is calculated using the following equations (shown below):

P = log (R/LSV)/[ log (FSV) - log (LSV)]

and V = P (VMax - VMin) + VMin or I =P (IMax - IMin) + Min where:

P = Percent of scale, expressed in a decimal number R = Current reading LSV = Low Scale Value FSV = Full Scale Value V = Voltage output I = Current output VMax = Maximum voltage available (usually 1OVdc)

IMax = Maximum current available (usually 20 mA)

VMin = Minimum voltage available (usually 0 Vdc)

IMin = Minimum current available (usually 4 mA)

If the current reading (R) is greater than the full scale value (FSV) the output is limited to the MAX.

value (typically 10 Vdc or 20 mA).

As an example:

Assume: LSV = 1E-1, FSV= 1E7, R = 1E3, IMax = 20 mA, and Min = 4 mA.

Then: P = [log (1E3/1E-1) ] / [ log (1E7) - log (1E-1)]

= log (1E4) / log (1E8)

= 4/8 = 0.5 and: I = 0.5 (20 mA-4mA)+4mA

= 0.5 (16 mA)+4mA

= 12mA To aid in calibrating the analog output, the high scale or low scale setpoint may be set to force the output high or low. If the low scale setpoint is set above the displayed value, the analog output goes to low scale. If the high scale value is set below the displayed value, the analog output goes to full scale. Error code E0008 will be displayed if either setpoint is set to zero. The procedure for calibrating the analog outputs is contained in Section 5.

4-18

Software Calculations The 956A-201 UDR requires setpoints to be entered which are inherent to each particular detector.

The following explains the calibration constant and resolving time.

Conversion Constant The first of these set points is the conversion cb6n.tant. The conversion constant converts the detector pulse rate into an mR/h value, using the following equation:

D=(CPMxK)-BKG Where: D = the calculated value in mR/h (used for,-alarm setpoint limitchecks)

CPM = the current, true, count rate in CPM (the sum of the*60 most recent 1I second values, corrected for Tau)

K = the conversion constant in mR/h/CPM BKG = 0 (not used)

The value of K is supplied on the detector calibration data sheet.

Resolving Time (Dead Time)

-- This constant is a co~rection for the resolving time of the detector. 'As the radiation 'field that the detector is viewing"increases, the detector cannot count every pulse,, because some are in coincidence or are so -close together that two -pulses may'look like one. To -correct for this nonlinearity, the resolving time is corrected for by the following equation:

CPM= Ro ."

-1 - (Ro x Dead Time)

Where:' CPM = the true count rate

Ro = the observed count rate (the sum of the 60 most recent 1 second'values)

Dead Time = the resolving time in minutes / count The value of Dead Time is supplied with the detector and is found on the detector calibration data sheet. This value identified as TAU on the data'sheet.'

4-19

FUNCTIONAL DESCRIPTION Functional Description The 955A-XXYYZZ consists of a Model 897A-2XX Detector, a Model 956A-201 Digital Readout, and an interconnecting cable. Optional local analog display and audible/visual alarm units may also be provided. The following describes the Model 897A-2XX and the Model 956A-201. Separate manuals are provided for the Model 958A Local Alarm Units.

897A Series Detector Functionally, the detector is divided into the GM tube and the preamplifier. The high voltage power supply for the detector is located in the 956A-201 Universal Digital Ratemeter. The block diagram for the 897A series Detectors is shown in figure 4-1. For additional information, refer to the applicable drawings located in Appendix B. The following versions of the Model 897A detector are available:

Model Number Range Material ,

897A-210 0.01 to 1.00E3 mR/h Carbon Steel Housing 897A-211 0.01 to 1.00E3 mR/h Stainless Steel Housing 897A-220 0.10 to 1.00E4 mR/h Carbon Steel Housing 897A-221 0.10 to 1.00E4 mR/h Stainless Steel Housing 897A-230 1.00 to 1.00E5 mR/h Carbon Steel Housing 897A-231 1.00 to 1.00E5 mR/h Stainless Steel Housing The 897A series detector is a thin walled, electronic tube composed of a negative electrode (cathode) and a positive electrode (anode). The tube is filled with a mixture of one or more noble gases, plus a small amount of an additional gas which acts as a quenching agent.

Circuit Description Quad comparator Z1 consists of two circuit configurations with four states. Three of the four states are comparators (Z1A is an input comparator, Z1B is an output comparator, and Z1C is an anti-jam comparator). The fourth state, Z1 D, is an oscillator for the anti-jam circuitry. Transistors 03 and Q4, with associated circuitry, provide a divide by 2 function, for use with Victoreen analog and digital area monitor readouts.

When ionizing radiation is not present at the GM detector, the input level of ZIA (pin 9) is higher in potential than the voltage level at pin 8. Using discriminator bias control R44, the amount of potential difference can be adjusted between these inputs, allowing input pulse discrimination.

Under the above condition, the output of ZIA is in a high state. R23, R20, and R30 create a voltage divider which biases pin 7 of Z1B to 7.5 Vdc. R24 and R36 bias pin 6 to 5 Vdc, causing the output of ZI B to go high. This action allows 01 to conduct, causing a low state to exist at the output.

When an ionizing event occurs, the GM tube produces a negative pulse which is coupled through 010 to input comparator ZIA. Pin 9 is now at a lower voltage potential than pin 8, forcing the output of Z1A to a low state. The voltage at pin 7 of Z1B is reduced to 2.5 Vdc, causing a low output state.

This action causes Q2 to conduct, presenting a +10 Vdc signal at the output (unterminated).

If saturation occurs, the detector provides a high dc current. The current flows through R25, inducing a voltage at pin 11 of Z1 C. When the potential at ZI C is higher than the anti-jam set point (R41),

the output is forced from a low state (normal operating condition) to a high state. Two events occur when a saturation condition exists:

1. 05, normally off, enters saturation, clamping the output of ZIA to a low state. The potential at pin 5 of Z1iD is reduced to 2.5 Vdc.

2. CR6 is reverse biased, enabling anti-jam oscillator ZID. A square wave pulse is produced at pin 6 of ZIB which has an amplitude that is approximately 5.0 Vdc. Since pin 7 was previously biased to 2.5 Vdc, an output anti-jam square wave signal is generated and coupled to the readout.

4-20

The low voltage power supply input for' the preamplifierlis jumper selectable. This allows the use of either a +10 Vdc or +15 Vdc supply for detector power. If the detector is used in a 955A system, the

• +15 Vdc position is used. If the detector is used -in a 855 analog area monitoring system, the +10 Vdc position is used. 'Jumper configurations are listed below.

Jumper Position Input Voltage J3 AB +15 Vdc (factory set), digital readout J3 BC +10 Vdc, analog readout The divide by 2 (or binary stage) converts the GM tube pulse output into -a pure square wave, at a frequency exactly one half'of the value of the Input pulse frequency., -This circuit provides more reliable signal transmission to the readout electronics. The output pulse conditioning is required for use with the diode pump circuitry used on older analog readouts. The optional jumper position, to use the detector pulse directly (divide by 1), is provided for use with high speed pulse counting scalers. Jumper configurations are listed in below.

Jumper Position Divide Option SJl,'J2 AB 2, square wave output (factory set) "

J1, J2 BC 1, Direct coupled Anti-Jam Setpoint Adjustment of the anti-jam setpoint (R41) is performed during factory-calibration. If'replacement of the GM tube is required, the detector should be returned to the factory for proper determination of the anti-jai'setpoint voltage, the dead time correction, and the count conversion factor.

Signat ora S- -'heck Source activatio n ignal :. ..

Power from UDR 897A SERIES DETECTOR ASSEMBLY Figure 4-1. 897A Series Detector Block Diagram Low Level Discriminator In order to reduce electronic noise and the counting of spurious signals, an adjustable low level discriminator circuit is provided. The discriminator is factory set at 0.5 Volt: R44 is used to adjust this value.

• Check Source Operation

.The'check source is provided to ensure that the GM tube and-the preamplifier are functional. The check -source consists of a 8 microcurie 3 6 CI source attached :to 'a D'Arsonoval meter movement.

Upon actuation of the Check Source'f unction,-+15 VDC is applied to the 'meter',m ovemer*t' ' This causes the check source pan to move over the access hole in the printed circuit board, exposing the source to the detector. The GM tube then responds to the radioactivity present, resulting in an increase in the UDR display. Releasing the check source pushbutton applies + 15 VDC to the meter movement, moving the check source to its de-activation, or rest position.

21

Universal Digital Ratemeter (UDR), Model 956A-201 The Model 956A-201 UDR is composed of five (5) circuit board assemblies mounted within the unit.

These circuit boards provide input/output, display, power, and control for the UDR. Each circuit board is described in detail in the following sections and accompanied by a block diagram where applicable. Schematic diagrams are located in Appendix B. Figure 4-2 is the system block diagram.

Main Circuit Board The main circuit board contains the microprocessor, memory, analog output, signal input, and control circuitry. Some of the circuitry located on the circuit board may not be installed depending on the model. The following paragraphs explain the operation of the circuits in detail. Figure 4-3 is a block diagram of the main circuit board.

Microorocessor The 6802 /6808 (U15) is a monolithic 8 bit microprocessor with 16 bit memory addressing. The 6802

/ 6808 contains a crystal controlled internal clock oscillator and driver circuitry.

A 4 MHz crystal is utilized with the internal clock circuitry to obtain 1 MHz operation. The (E) enable pin on the MPU supplies the clock for both the MPU and the rest of the system. Figure 4-4 is a typical timing diagram for write and read cycles.

The read/write output signals the memory / peripherals that the MPU is in a read (high) state or a write (low) state. The normal standby state is read (high).

The valid memory address (VMA) output indicates to peripheral and memory devices that there is a valid address on the address bus.

The address bus outputs (AO - A15) provide for addressing of external devices.

The data bus (DO - D7) is bi-directional and is used for transferring data between the MPU and memory/peripheral devices. The data bus will be in the output mode for a write cycle and in the input mode for a read cycle.

The Interrupt Request Input (IRQ), when low, requests that an interrupt sequence be generated within the MPU. The processor will wait until it completes the current instruction that is being executed before it recognizes the request. Various internal registers are stored on the stack before a branch to the interrupt vector is carried out. When the interrupt routine has completed, the registers are restored and the MPU continues to execute the program. The IRQ input is not utilized on the main circuit board, however, it is provided to the external bus connector to be used by IRO generating devices located on the option boards.

The reset input (active low) is used to restart the MPU from a power down condition, (restart from a power failure or an initial start-up). A low to high transition on this input signals the MPU to begin the restart sequence.

The nonmaskable interrupt (NMI) input, upon detection of a low-going edge, requests that a nonmaskable interrupt sequence is generated within the MPU. As with the interrupt request signal, the processor will complete the current instruction being executed before it recognizes the NMI signal. Various internal registers are stored on the stack before a branch to the NMI vector occurs.

Upon completion of the NMI routine, the internal registers are restored and program execution continues.

4-22

I IFigure 4-2. System Block Diagram 4-23

ADDRESS BUS DATA BUS RE DECODED ADDRESS 4040, 60, B0-ED Figure 4-3. Page 1 of 3. Block Diagram - Main Circuit Board 4-24

FRONT PANEL BACKLIGHTS & STATUS INDICATORS Figure 4-3. Page 2 of 3. Block Diagram - Main Circuit Board 4-25

DIGIT VALUE ENTER FUNCTION J E2 PROM SERIAL DATE Xs JP3JUMPER ARRAY

- STATISTICAL ACCURACY

• FAIL ALARM IWBfT/ ENABLE

AUTO I MANUAL ALARM ACK.

FRONT PANEL' - W/S ALARM INIDrrTI ENABLE Figure 4-3. Page 3 of 3. Block Diagram - Main Circuit Board 4-26

MC6802 a MC6808

• MC6802NS Bus Timing Characteristics Ident. - ,Charactenstics Symbol MC6802NS MC68A02 MC68802 UNIT Number MC6802 MC68A08 MC68B0B

- "- *MC6808 Min. Max. Min. Max. Mm. Max.

I

• 1 Cycle Time tcyc .1.0 10 0.667 10 - 0.5 10 ps 72 Pulse Width, E Low PWEL 450, 5000 280 5000 210 5000, ns 3 Pulse Width, E High PWEH 450 9500 280 - 9700 220 9700 ns 4 Clock Rise and Fall Time tr, If --- 25 .-. 25 .-- 20 ns 9 Address Hold Time tAHl 20 --- 20 -.- 20 --- ns 12 Non-Muxed Address Valid Time tAV1 160 --- 100 --- 50 -.-. ns

. _ to E (See Note 5) tA --- 270 *.. .. s 17 Read Data Setup Time .1 tDSR. - 100 -- 70 --- 60 "- s 18 Read Data Hold Time tDHR 10 -.- 10 ... 10 --- ns 19 Write Data Delay Time tDDW --- 225 -- 170 -.-- 160 ns 21 Write Data Hold Time tDHW 30 *-" 20 --- 20 --.- ns 29 Usable Access Time tACC 605 --- ...-- 235 --- ns (See Note 4) _ -- -

NOTES.

1. Voltage levels shown are VL_5 0.4 V, V H > 2.4 V: unless otherwise specified.

2. Measurement points shown are 0.8 V and 2.0 V. unless otherwise noted.

3. All electncals shown for the MC6802 apply to the MC6802NS and MC6808, unless otherwise noted.

4. Usable access time is computed by: 12 + 3 + 4 - 17.

5. If programs are not executed from on-board RAM, TAVI applies. If programs are to be stored and executed from on-board RAM, TAV2 applies. For normal data storage in the on-board RAM, this extended delay does not apply.. - Programs cannot be executed from on-board RAM when using A and B parts ( MC68AO2, MC68AO8, MC68B02, MC68B08) On-board RAM can be used for data storage with all parts Figure 4-4. Read / Write Timing Diagram 4-27

Reset lircu The reset circuit generates a 650 ms wide low pulse to the MPU reset input and various external registers. The R1 / C1 network generates a delayed trigger pulse to the U10 multivibrator. Upon power up, C1 charges through RI. When approximately 1.4 volts is reached, Ul1-8 goes low, triggering U10. U10-4 goes low, U1O-13 goes high; this condition is held for 650 ms. When U10's delay is complete, U10-4 returns high and U10-13 returns low. The low to high transition on U10-4 signals the MPU to begin a reset sequence. JP1 - Reset Pins, on the circuit board, may be shorted to initiate an MPU reset for troubleshooting purposes.

Clocks The system clock is generated by the MPU using a 4 MHz crystal, CR1. The system clock, from which others are derived, is an output on the MPU pin 37 and operates at 1 MHz.

NMI Cloc The NMI clock is generated by U30, U31, and U32, which are dual decade counters. The 1 MHz system clock is applied to the U30-1 input. U30 is a divide by 100 counter, while U31 is a divide by 50 counter, with respect to the input frequency. Therefore, U30-9's output is 10 kHz and U31-9's output is 200 Hz. U32 is connected for operation as a divide by 25 counter, which produces an 8 Hz output on U32-9.

Write Cycle Clock The Write Cycle Clock is generated by U19. The 1 MHz system clock is applied to the U19-2 input, which is adjusted via VR13 for a -225 ns delay from the falling clock edge. The second stage of U19 produces a 225 ns output pulse width. Figure 4-5 is the timing diagram for the write cycle clock.

Signals short 02 and short 02 are buffered by U18 to produce write 02 and write 02 which are used by the system.

CLOCK A i

WRITE 02 B

A. 225 ns minimum B. 235 ns typical Figure 4-5. Wnte Cycle Clock Timing Diagram Address Drivers Line dnvers U12 (low order addresses) and U13 (high order addresses) provide signal buffering and capability to drive 15 TTL's unit loads for the address bus. The output drives are all internal devices utilizing address signals on the main circuit board as well as the J3 option interface bus connector for additional circuit boards.

4-28

Data Transceivers Data transceiver U16 is an octal tn-state bi-directional transceiver which provides drive capability to the data bus. The MPU data I/O signals are connected to-U16 8A6 ports; U16 "B" ports-drive the data bus under control of the read/write signal. -When U16-11 is low, data is-transferred from the "B" ports (internal bus) to the "A"ports (MPU data). When U16-11 is high, data is transferred from the "A'ports (MPU data) to the 'B" ports (internal bus) during a wdte cycle. -

Data transceiver U73 provides buffer and drive capability to the external data bus interface, available for optional circuit boards on J3. Data direction is controlled by the read/write line on U73-11 providing U73-9 (bus enable) is low, which enables port to port data transfer to occur. The bus enable signal is generated by the option board/boards when they~are addressed by the MPU. When U73-11 is low, for a read cycle, data is transferred from the external bus to the internal bus. When

'U73-11 is high, for a write cycle, datal is transferred from the internal bus to the external bus.

--Control Sional Buffer Line driver U18 provides a signal-drive for all system control signals and clocks utilized by circuitry within the main circuit board.

Line driver U74 provides the drive for control lines and clock signals for external circuitry utilizing the J3 option interface connector. .

Address Decodino The master decoder (U14) is an open-collector 32 x 8 bit bipolar PROM. Address lines A15, A14,

- A13, and A12 as well as read/write are used to decodememory and I/O addresses in 4K hex blocks.

-,'Table 4-6 lists the output signals from U14. * -

Table 4-6. Output Signals (U14) - - .

U14 Pin Signal Name Address Read/Write 9 PROM 8000 8000-FFFE Read Only

-7 - - Spare -Spare 6 RAM 2000 (future) "2000-3FFF Read/Nrite 5 RAM 0000 0000-1FFF Read/Write 4 1/0 4000-4FFF Read/Write 3 RAM Write 0000-3FFF '-Write Only 2 RAM Read 0000-3FFF Read Only 1 5000 Block 5000-5FFF Read/Write 29

PROM 8000 directly drives the enable pins of the PROM. RAM 0000, RAM 2000 and RAM Read are logic OR'd with Clock from U17. RAM Read drives the RAM output. Enable pins RAM 0000 and RAM 2000 act as chip enables for the appropriate RAM. RAM Write is logic OR'd with Write 02 by U17, which is connected to the write enable pins on the rams. The 5000 Block output signal is applied to driver U74 and connect to J3, the optional interface connector.

The I/O output signal is applied to major function decoder U1 which is a 1 of 8 decoder. U1 utilizes address lines A5, A6, A7, and AB as well as Clock to generate outputs which are decoded in 32 hex blocks starting at address 4000. Table 4-7 lists U1 outputs, their functions and addresses.

Table 4-7. U1 Outputs Address State Address Function A8 A7 A6 A5 0 0 0 0 4000 Register Select 0 0 0 1 4020 Bargraph 0 0 1 0 4040 ACIA (Communication Interface, optional) 0 0 1 1 4060 SCA (Analyzer, optional) 0 1 0 0 4080 GPIB (General Purpose Interface Bus) 0 1 0 1 40A0 Analog Input Option 0 1 1 0 40C0 (Spare) 0 1 1 1 40E0 (Spare)

Address 4000 is further decoded by the write register decoder (U2) and the read register decoder (U34). The bargraph output, address 4020, is further decoded by US. The remaining output address (4040 through 40E0) are provided to the optional interface connector for use by external J option circuit boards.

PROM The Programmable Read Only Memory is typically a 27256 which is a UV erasable 32K x 8 bit PROM. U23, which responds to address 8000-FFFF, is always present. U23 contains the operating program for the UDR (firmware). Jumper JP2 is normally set from 2 - 3. By setting JP2 from 2 - 3, A14 is applied to pin 27 of U23 which allows the use of a 27256 PROM (32K x 8).

RAM Dynamic Random Access Memory (U21) is utilized for temporary data storage. U21, which responds to address 0000-1 FFF (8K x 8 bit), is always present. Data stored in the RAM is lost on power down.

Sixteen (16) monitor specific, operator entered setpoints are stored in 64 bytes of non-volatile electrically erasable memory (E 2 ). U33 provides storage for the setpoints (256 bytes max.). U35 is an 8-Bit control register.

4-30

Read - Write Cycles A read cycle is performed by sequencing RAM 0000 and RAM Read, while-RAM Write is held high (inactive). The address (AO - A12) are latched by the failing edge of RAM 0000. Data becomes valid approximately 250 ns later. 1I A write cycle is performed by sequencing RAM 000 and RAM Write, while holding RAM Read high (inactive). Identical to the read cycle, the address (AO A12) are latched by the falling edge of RAM 000. Data is strobed Into RAM on the failing edge of RAM Write.

Write Register Decoding Decoding for write registers within the main circuit board is performed,-by U2, which is a 1 of 8 decoder. Control signals for U2 are Reg. Select, R/W (active high), Write 02 as well as addresses Al, A2, and A3. U2 decodes two addresses per output, starting at 4000, and ending with 400E.

These outputs are active low. Table 4-8 lists write registers, their assigned function and address.

Table 4-8. Write Register Functions Address State Hex Address Function A3 'A2 Al

,0 - 0 0 4000 Status Indicators 0 0 1 4002 E 2 PROM 0 1 0 4004 D/A Converter 0 1 1 4006 Display Control 1 0 0 4008 Display Data.

1 0 1 400A Counter Conirol 1 1 0 400C Relay Control

• 1 1 1 400E (Spare)

Counter Control (Write Onlv)

"The counter- control register (U43) is 6n, 8°bit registeF .with clear-arid resp6-ndas.to.'addresss'400A.

Upon initial power-up, the system resets all outputs low. Table 4-9 lists the counter control register write functions. .. .

NOTE Data written'into U43 remains at the outputs until a reset occurs or new data is written.

Table 4-9. Counter Control Register Write Functions

-Data Bit Function DO Counter Clear D1 Counter Enable D2 HV Shutdown D3 HV Select D4 Clear Switch Latch D5 Not Used D6 Not Used D7 Not Used 4-31

Relay Control Register (Write Only)

The Relay Control Register (U44) is an 8 bit register with clear, and responds to address 400C. Upon initial power-up, the system reset signal sets all outputs low. Data written into U44 remains at the outputs until a reset occurs or new data is written. Table 4-10 lists relay control write functions.

Table 4-10. Relay Control Register Write Functions Data Bit Function DO Fall Relay and Indicator D1 Check Source Relay D2 Warn Relay D3 Alarm Relay D4 Rate-of-rise Relay (not used)

D5 Remote Indicator (not used)

With the exception of the fail bit (DO), all outputs are applied to U48, which is an inverting open collector driver. The outputs of U48, including fail, drive (via the J2 connector) mechanical relays located on the relay board. The fail bit is used as an input to U47-3 which, when set high-low-high once per second, causes output U47-6 to remain low. Should this high-low-high sequence fail to occur (under MPU control), U47 will time out and set U47-6 high, causing the fall indicator on the panel and the fail relay to de-activate. U48 also drives the remote indicator (when used) on the front panel.

Bargragh (Write Only)

The bargraph addresses are decoded by U5, which is a 1 of 8 decoder. Control line inputs to U5 are R/W, Write 02, and Bargraph. When the bargraph address is selected (4020-4025), U5 further decodes the addresses listed in Table 4-11.

Table 4-11. Bargraph Write Address Address State Hex Address Function Driver A3 A2 Al 0 0 0 4020 Green 1-10 U55, U56 0 0 1 4021 Green 11-20 U57, U58 0 1 0 4022 Green 21-24 U59 0 1 1 4023 Red 1-10 U50, U51 1 0 0 4024 Red 11-20 U52, U53 1 0 1 4025 Red 21-24 U54 4-32

The outputs of U5 drive the latch enable pins on U50-U59 in pairs as shown in Table 4-11. U50-U59 are BCD-to-7 segment latch/decoder/drivers. Each drives five segments (either red or green) with the exception of U54 and- U59 which drive four segments -each.. BCD to bargraph decoding is

- accomplished by latching data Into the appropriate device to turn on-the required bargraph

. segments.- Segment decoding is shown below:

Typical 7- Segment BCD Character LED IOF5= 1 LED 2 OF 5 = 7 LED 3 OF 5 = -3 LED4OF5= 9 LEDSOF5=

a A=F NONE =

d Assume that all bargraph segments are off. Example: Write hex data 38 to bargraph address 4020.

Data 38 is stored, low byte (8) in U55 and high byte (3) in U56. Data (8) in U55 causes the code for an 8 to be output, which drives all output segments. The result is that the first five green LEDs turn on. Data (3) in U56 causes the code for a 3 to drive segments 1,2, and -3 connected to that device.

The result is that the first 3 of 5 segments associated with U56 will turn on green.

Status Indicators (Write Only)

The status register (U60) is an 8 bit register with clear, and responds to address 4000. Data written into U60 remains at the outputs until a reset occurs or new data is written. -Upon Initial power-up, the system reset signal sets all outputs low. The status indicator write functions are listed in Table 4-12.

STable 4-12. Status Indicator Write Functions Data Bit Function DO Check Source Indicator D1 Rate.(not used)

D2 Overrange Indicator D3 Warn Indicator D4 High Alarm Indicator D5 R/hr Backlight

-D6 kRPh Backlight D7 mR/h Backlight U60 outputs, when high, control U61 inverter/driver to activate the appropriate front panel status indicators. U60 outputs, when low, control U61 "to deactivate the appropriate front panel status indicators.

4-33

Disolay Control (Write Only)

Registers U71 and U72 are used to control and display data on the front panel 7-segment displays.

Five digits are used along with two spare digit drive signals. The display control register (U71) is an 8 bit register, utilizing four data bits (DO-D3). The display data register (U72) is also an 8 bit register utilizing five data bits (DO-D4). Both U71 and U72 outputs are reset (low) upon initial power-up.

U71 is used to select the digit to be written as well as to set the WRITE bit input to U75, the display controller. U72 is used to enter the data to be written and a decimal point for the selected digit.

U75 is a universal eight digit 7-segment LED driver controller used with common anode devices.

Address inputs (AO-A2), supplied by U71, are used to select the digit as shown below:

A2 Al A0 Selects 0 0 0 Digit 1 0 0 1 Digit 2 0 1 0 Digit 3 0 1 1 Digit 4 1 0 0 Digit 5 7 - Segment Front Panel Display I.!!-II ! _IMZ

!__1 I__

LL fl aflf  !._.J!_.L!_.JL l Digit 5 Digit 4 Digit 3 Digit 2 Digit 1 Data inputs D0-D3 and the decimal point, supplied by U72, are used to enter data in the selected digit as shown in Table 4-13.

Table 4-13. Hex Data (Written to Address 4008)

Hex Data 0 1 2 3 4 5 6 7 8 9 A B C D E F Display 0 1 2 3 4 5 6 7 8 9 - E H L P (blank)

Character The display controller contains all necessary circuitry including address decoding, static RAM, and multiplex oscillator for interdigit blanking.

4-34

Diaital to Analoo Converter and Outout Circutry (Write Only)

The D/A converter (U32) is an 8 bit buffered multiplying device which -responds to address 4004.

Data is written and latched by U82 when CS and WR are active (low). The converter is configured for unipolar operation with a voltage reference of + 1OVDC. Below is the digital to analog conversion table with the voltage measured at U82-1 referenced to ground.

..MSB LSB Analoq'Out6ut 1111 1111 -1OVDC 1000 0000 -5Vdc 0000 0001 - 0.039 V 0000 0000 0V UB1 operational amplifier 1 buffers the converter output to drive the three analog output circuits.

This voltage is also provided to J4, analog option connector. J4 is provided with the necessary supply voltages to configure a custom analog output range for special applications (i.e. 10 mV to 50 mV). U81 operational amplifier 3 provides the user with a 0 - 10 volt analog oLutput. VR1 is the zero adjustment and VR2 is the gain adjustment for the 0 - 10 volts output.

The circuitry comprised of U80 operational amplifiers 1 and 2, as well as U81 operational amplifier 2, provide* a4 - 20 fnA bser output. 'VR7 is&djusted to obtain a 4 mA reading on thd output, and VR4 is adjusted to obtain a 20 mA reading on:the output. U81 operational amplifier 2 and 01 are configuredas a constant current source controlled by the outputof'UB0 operational amplifier 1--, The positive feedback circuitry, comprised of R41 and R43, ensures that the output current will remain constant regardless of the output load impedance. The maximum load impedance is 500 ohms.

The circuitry comprised of U80 operational amplifiers 3 and 4 as well as U81 operational amplifier 4 provides a second 4 - 20 mA user output. Operation is identical to the circuitry previously described in this section. VR6 is adjusted to obtain a 4 mA reading at the output-and VR5 is adjusted to obtain a 20 mA reading at the output.

Read Register Decoding Decoding for READ registers within the main circuit board is performed by U34, which is a 1 'of 8 decoder. Control signals for U34 are REG SELECT, and R/W (active high) as well as address Al, A2, and A3. U34 decodes address per-output, starting with 4000 and ending with 400E. These outputs are active low. Table 4-14 lists the READ register, the assigned function and the address.

Table 4-14. Control Signal Address Decoding (U34),

Address State Hex Address Function A3 A2 Al 0 0 0 4000 -.Switch Interface 0 0 -1 4002 Data Entry 0__.1 0 4004 Gross-Counter Low 0 1 1 4006 Gross Counter High 1 0 -0 4s008 -Sensitivity Select 1 0 1 400A (Spare) ....

"1 1 0. 400C - (Spare) - -

1 -1.* 1* 400E --. (Spare) -, -

4-35

Data Entry (Read OnlIy Octal buffer U36 functions as an interface to supply the status of the switches for data entry to the internal data bus address (4002). The data entry read functions are shown in Table 4-15. The function switch logic is shown in Table 4-16 Table 4-15. Data Entry Read Functions Data Bit Function DO Enter Switch (Active Low)

DI Value Select Switch (Active Low)

D2 Digit Select Switch (Active Low)

D3 (Not Used)

D4 (16 position function switch, see Table 4-16)

D5 (16 position function switch, see Table 4-16)

D6 (16 position function switch, see Table 4-16)

D7 (16 position function switch, see Table 4-16)

Table 4-16. Function Switch Logic Hex Data D7 D6 D5 D4 Position Function F 1 1 1 1 0 High E 1 1 1 0 8 Calibrate Mode D 1 1 0 1 1 Warn C 1 1 0 0 9 Underrange B 1 0 1 1 4 Overrange A 1 0 1 0 C Undefined 9 1 0 0 1 5 Conversion Constant 8 1 0 0 0 D Undefined 7 0 1 1 1 2 Tau 6 0 1 1 0 A Undefined 5 0 1 0 1 3 Full Scale Value 4 0 1 0 0 B Undefined 3 0 0 1 1 6 Undefined 2 0 0 1 0 E Undefined 1 0 0 0 1 7 Low Scale Value 0 0 0 0 0 F Undefined Gross Counter (Read )nIvI The gross counter is a 16 bit configuration. Octal buffer/drivers U40 (4004) and U41 (4006) interface the low and high counter bytes to the data bus from U45 and U46 respectively. Dual module 16 counters (U45, U46) accumulate counts from the signal processing circuitry over a program controlled sample period and make this data available to the MPU. A high level on U45 pins 2 and 12, and U46 pins 2 and 12 cause the counters to clear in anticipation of a sample being initiated. A low level activates the counters to accept pulses from the signal processing circuitry. Maximum count for a sample period is 32,768. When this count is achieved, U46 pin 8 goes high which causes the pulse counting to stop. This condition is recognized by the MPU as an indication of counter overflow.

4-36

f- I Sensitivity Select (Read Only)

Octal buffer U42 functions as an interface to provide the status of the sensitivity selection jumpers, mode jumpers, anti-jam bit data, and ,serial data fiom E2 PROM io the internal data bus and MPU.

U42 responds to address 4008. The sensitivity read functions are listed in table 4-17.

Table 4-17. Sensitivity Select Read Functions

-Data Bit Function DO Serial data from E2 PROM D1 Anti-Jam D2 (not used)

L D3 JP3-5 (IN)Inhibit alarms during check source operation (factory setting)

(OUT) Alarms active dunng check source operation :

"D4 JP3-4 (IN)Fails in five minutes with no counts (factory setting).'

(OUT) Does not fall D5 - JP3-3 (OUT) Auto alarm acknowledge, after counts return to normal

-. (IN) Manual Reset (factory setting),,-

JP3 jumper INMPU reads a low (0)

JP3 jumper OUT MPU reads a high (1)

Switch Inputs Octal inverting buffer U62 functions 'as an inte rface to provide',the status of the. front panel control

-switches to the internal data bus and MPU.'- U62 responds to address 4000. The switch input bit

• assignments are'listed in table 4-18.

Table 4-18. Switch Input Bit Assignments (U62)

Data Bit Function "Do: . Alarm Acknowledge Dl,: Check Source

. .. D2 . (Spare)

D3 (Spare)

D4 Rate-of Rise (not used) .

D5 Warn Alarm D6 - High Alarm D7 - - High, Volt age (not used)

When a switch'is'pressed, the appropriate input tod U62 is pulled low. When U62 is read by the MPU, a high'(1) is available on the data bus. When' no switches have been pressed, all outputs (U62) will be low when read. U63 is a latch which latches switch data from thb check source and alarm acknowledge switches. The MPU controls the-clear switch latch signalto reset U63.- The circuit comprised by S1, D1, and R11 is a remote alarm-acknowledge. Rll is selected to allow a 20 mA signal to flow through the S1 infrared diode when a given voltage is present on the J9 remote

- acknowledge input. When this voltage is present, the S1 infrared diode is forward biased, causing the S1 phototransistor to conduct. This effectively forces a low (0) to U63-10, setting the alarm acknowledge bit.

-- 4-37

Ootion Board Bus The option board bus is available on connector J3. All address, data, and control signals are provided to allow various digital/analog circuit boards to directly interface to the main circuit board.

Decoded signals for asynchronous communications interface adapter option, and the general purpose interface bus option are available on the option board interface connector.

Signal Inout Circuitry Detector input pulse circuitry consists of an input buffer, high/low discriminators, signal detection, anti jam and signal multiplexer circuits. The following paragraphs describe circuit operation in detail.

Buffer Amplifier The detector input is connected to J6. The input impedance is 50 ohms to match the signal cable and the detector's output impedance. Jumpers JP4 and JP5 are used to select the proper pulse polarity as shown below.

Jumper Function Remarks JP4 1-2 Pulse Polarity (Input) For negative input JP4 2-3 Pulse Polarity (Input) For positive input (factory set)

JP5 1-2 Pulse Polarity (Shield) For negative input JP5 2-3 Pulse Polarity (Shield) For positive input (factory set)

The detector input signal (with appropriate polarity jumpers installed) is applied to unity gain buffer amplifier U90. VR8 is used to fine adjust for unity gain. Regardless of input signal polarity, U90-6 outputs positive going pulses. VR9 is a zero offset adjust for U90. The buffer amplifier output is provided to the J7 connector (for use by analyzer option circuitry) as well as the high and low discriminators. TP-Pulse is available as a test.

Discriminators The low level discriminator is comprised of comparator U91 device 2 and associated circuitry. VRI 1 is used to set the trip threshold. The adjustment range is 50 mV to 1 volt, which can be measured at the low discriminator test jack. As the positive pulse, applied to the input, passes through the trip threshold, the output (U91-6) is forced low. When the pulse returns through the trip threshold, the output U91-6 returns high and is ready to accept another input pulse. Pulses below the trip threshold do not trigger the output.

The high discriminator is comprised of comparator U91 device 1 and associated circuitry. VR10 is used to set the trip point. The adjustment range is 3.5 to 7.5 volts, which can be measured at the high discriminator test jack. As the positive pulse, applied to the input, passes through the trip threshold, the output (U91 device 1) is forced low. When the pulse returns through the trip threshold, the output (U91 device 1) returns high and is ready to accept another input pulse. Pulses below the trip threshold do not trigger the output.

The normal factory setting are: Low Disc.: 0.500 Vdc High Disc.: 7.000 Vdc Figure 4-6 shows signal "Au below both discriminators, signal "B' between discriminators, and signal "C' above discriminators.

4-38

"' I;1 High Disc. Setting, 7V

-C" "B"

+ 5 Volts High Disc.

Output U91-I Oolt * . -

-+5 Volts Output to pulse counting circuitry 0 Volt

- A: This pulse is below the low discruninator voltage and is not passed B: This pulse'is above the low discnrminator voltage and below the upper discnrminator voltage, and is passed to the counters C: This pulse is ab6ve the 6pper discrimnator and is not passed.

I Figure 4-6. Discriminator Operation.

4-39

Signal Detection The circuitry comprised of flip-flop U93 and inverters Ull and U94 utilize the low discriminator and high discriminator outputs to ensure that only input signals which peak between the discriminators are made available to the gross counters.

When U93-2 counter enable is brought high, under software control to initiate a sample period, and the low discriminator threshold is exceeded, a positive going edge on U93-3 clocks a high into flip flop U93-5. Assuming the high discriminator has not been exceeded, when the input pulse returns through the low discriminator threshold, a positive going edge on U93-11 clocks the high on U93-12 to the output U93-9. A delayed positive pulse produced by the RFC network (R80/C35) on U93-13 allows the flip-flop output U93-9 to remain high until the delayed pulse on U93-13 returns low, which resets the output U93-9 low. U93-9 is connected to the signal multiplexer circuitry as described below.

When an input pulse exceeds both the high and low discriminators, the high (U93-5) clocked by the transition through the low discriminator is reset by the low (U91-1) resulting from the transition through the high discriminator. This action causes no pulse to be generated at U93-9.

Signal Multiolexer The signal mutiplexer comprised of U101, U102, and U94 allows the MPU to select either the radiation pulse or the frequency output representing the high voltage to be input to the gross counters. When counter enable is active (high), the signal detection circuit output (representing radiation ) is routed to the gross counters. When HV select is active (high), the HV frequency is routed to the gross counters. The outputs connected to pull-up resistor R81, are open collectors allowing the most significant bit of the counters to force this node low, effectively terminating the pulse input to the counters and indicating an overflow condition.

Anti-Jam Circuitry The anti-jam circuitry allows for the detection of rapid increase in pulses (due to a rapid increase in radiation at the detector) and provides a bit to the sensitivity select register. A detector will reach a point, in a very high radiation field, when it will no longer provide pulses, but conducts continuously.

The absence of pulses would normally indicate a low radiation field, when in actuality this is not the case. The purpose of the anti-jam circuit is to detect that this situation is about to occur, and to indicate it to the MPU. The MPU will then shut down the high voltage.

The input to the anti-jam circuit is provided by the low discriminator output (U91-6). JP7 selects detector type, *1-2 for scintillation detectors and 2-3 for GM type. 03 turns ON/OFF with input pulses, which allows C39 to charge to an average DC level. VR12 (adjustment range 0 to 1.6 volts) is used to adjust the trip threshold on comparator U92-2. When the repetition rate of the input pulse causes C39 to charge and the DC level to exceed the threshold, comparator output U92-1 (low in normal operation) is forced high. When this occurs, U96-2 goes high (U96-1 is high after power-up) U93-3 goes low and U96-4 goes high. Diode D9 effectively latches this circuit in the jam mode. That is, if C39 discharges (due to absence of input pulses) and U92-1 goes low, D9 becomes forward biased which holds U92-2 high. The high, now on U96-4 causes 04 to turn on driving 05 on, forcing U96 8,& 9 node to ground. In-normal operation, JP6 is in position 1-2 allowing high current flow through F1 (1/20 Amp fuse) causing it to blow. R82 will now hold U96-8,& 9 node at ground, causing U96-10

• (anti-jam bit) to be active (high). At this point, normal operation can only be achieved by replacing fuse Fl. Jumper JP6 - position 2-3 is for test purposes only and allows fuse F1 to be removed from the circuit and R79 provides pull-up to + 5 volts. In this mode, cycling of power resets the anti-jam circuit. R93/C41 on U96-1 provides a delay from power-up to inhibit false tripping of the anti-jam circuit.

4-40

4' ,,

High Voltage Supply The high voltage is utilized by a GM detector.(typical range 500 volts to 650 volts). The -adjustment

-range of theHV supply is 300 Vdc to .1800'Vdc. The HV output is'short circuit proof in that it will current limit the oscillator 'section within ten seconds of the output being shorted. The board plugs Into the main circuit board at the J8 connector.

R5 and associated circuitry provide the DC voltage adjustment to U1 device 3. The output U1-8 will vary under control of R5.'

Operation -amplifier U1 device I drives transistor Q1 which in turn drives the oscillator section transistor 02, the transformer primary and feedback windings, and .associated circuitry. As R5 is adjusted to increase the high voltage, U1-8 voltage increases which causes -U1 device 1 *to increase transistor Q1 base current. -This increases the emittter/collector current, raising the voltage on the emitter. As this control voltage increases, the voltage developed across the transformer primary also increases. The transformer secondary increases in voltage, which causes the high voltage output to increase. The voltage quadrupler operation is illustrated in figure 4-7.

R2 is a 1000:1 voltage divider which provides feedback to control the high voltage. U1-2 is used as a buffer between the 1000:1 divider and the 1000:1 output signal. This output signal is also utilized by U1-1 to regulate the high voltage and is sent to the HV test jack. The shutdown signal (provided by the controller) when low, has no effect on the high voltage. When the shutdown signal goes high, 03 conducts causing Q1 to turn off. This action forces the oscillator to turn off, effectively shutting down the high voltage.

Short circuit protection is provided by the positive temperature coefficient thermistor (PTC). The PTC resistance in normal operation is nominally 5 ohms. When the high voltage output is shorted, the control circuitry U1 device 1 attempts to maintain regulation by increasing the base drive for transistor 01. Excessive current flows through the PTC, causing the internal temperature to increase. As the temperature increases, the PTC resistance also increases dramatically. The effect is that the control.voltage to the oscillator is decreased.to a minimum level. The response of the PTC is approximately ten seconds. Removal of the short circuit condition results in restoration of the high voltage to the preset level.

"4-41

TISECONDARY E HV OUT tII I 200 VOLTS NODE A 0 VOLTS

-200 VOLTS 400 VOLTS NODE B 0OVOLTS 400 VOLTS NODE C 0 VOLTS 800 VOLTS NODE D 400 VOLTS 0 VOLTS 800 VOLTS NODE E 0 VOLTS ................................... ~mi=

Figure 4-7. High Voltage Output (800VDC).

4-42

Relay Circuit Board The relay circuit board contains five independently controlled mechanical relays. Each relay provides two Form C sets of contacts with the exception of the check source and alarm relays which provide a single Form C set of contacts. Interconnection is from J2 on the relay board to J2 on the main circuit board. The control signals (active low) and + 15 volts common are provided. The relays typically perform the following functions:

KI: Spare K2: Check Source K3: Fail K4: Warn K5: Alarm The relay contacts are provided to the-,user via rear panel connector P.- -See specifications for contact ratings. Varistors (V1-V16) provide transient protection across the contacts.

Front Panel Circuit Board The front panel circuit board consists of the 7 segment display, backlights, status indicators, switches, and bargraph assembly. The front panel interfaces to the main circuit board via interconnecting row 100, 200, and 300. The main power switch also mounts to the front panel circuit board. Refer to figure 4-7 for a view of the front panel.

Circuit Description (Front Panel Circuit Board)

The 7 segmernt displays are controlled by the display controller as described in "Display Control".

'The bargraph is controlled by the circuitry described in "Bargraph (Write Only)". The status indicators are described in "Status Indicators (Write Only)". Switches are described in "Switch Inputs".

4-43

Figure 4-8. Front Panel, Model 956A-201.

4-44

I 'ý" - It Power SuDDIy The UDR power supply is rated at +5 volts @ 3 amps, +15 volts @ 2.0 amps, and -15 volts @ .5 amps. The input is user selectable at 115 Vac (92 to 132 Vac) or 230 Vac (180 to 264 Vac). The power supply is designed to meet safety requirements UL/CSAJVDE. EMI emissions comply with FCC/Class B requirements.

The AC input to the power supply may range from 90 to 204 Vac @ 50.60 Hz. The 956A, however, must be configured for use at 125 Vac, 50/60 Hz as a factory option.

The power supply provides all internal UDR voltages as well as detector supply voltages. All outputs are protected with automatic recovery upon removal of overload or short circuit condition.

Optional Circuit Boards Option circuit boards are installed into the 50 pin J3 connector available on the main circuit board.

As many as three option boards may be stacked into the J3 bus. The following paragraphs describe the available options. A separate manual for each option board is available with more detailed information. Listed below are the option boards currently available. Refer to Table 1-1 for currently available modifications and to Appendix C for the Bill of Materials.

1. 942-200-75: ANALOG INPUT OPTION BOARD - (Generally not used for normal operation with the 956A-201 UDR, however, it is used if the UDR is part of a simulator) Contains four separate channels for analog inputs. A 0 to 10 Vdc input or 4 to 20 mA input can be selected independently for each channel using the jumpers and switches provided on the board.

Possible inputs to the board include: temperature, pressure, flow, or simulated radiation.

2. 942-200-80: COMMUNICATIONS LOOP OPTION BOARD - Designed to enable a EIA RS232C serial communications between VICTOREEN's ratemeter and a user computer system or CRT terminal, with baud rates ranging from 50 to 19200 baud. An asynchronous communication interface adapter is utilized to format the data and control the interface.

The VICTOREEN communications interface option board also provides the necessary circuitry to allow interconnecting to a VICTOREEN proprietary serial communication port. This interface allows multiple UDRs to share a common six wire cable to a main central processor unit.

3. 942-200-95: ANALOG OUTPUT BOARD - Designed to provide a user selectable single output voltage of: 0 - 10 Vdc, 0 - 5 Vdc, 0 - 1 Vdc, 0 - 500 mVdc, 0 - 100 mVdc, 0 - 50 mVdc, or 0 10 mVdc.

4. 942-200-95M1: DUAL ANALOG OUTPUT BOARD - Designed to provide two user selectable output voltages. Output #1 is either 0 - 5 Vdc, or 0 - 10 Vdc, while output #2 is either 0 - 10 mV dc, 0 - 50 mVdc, 0 - 100 mVdc, 0 - 500 mVdc, or 0 - 1 Vdc.

4-45

(BLANK PAGE) 4-46

Section 5 - Maintenance Maintenance The 955A Area Monitoring System is designed to operate for extended periods of time with no scheduled maintenance required. However, periodic inspections may be performed to verify system integrity and calibration have not changed. If a problem develops, verify system calibration per section 6, or trouble shoot the system per section 7 and the drawings in Appendix B.

NOTE If a maintenance question arises, please contact the Victoreen Customer Service Department at (216) 248-9300 for assistance.

5-1

(BLANK PAGE) 5-2

I Section 6 - Calibration Calibration The 897A GM Detector is factory calibrated on a 37 ` Cs ' °Co range. A +/- 20%,8 point NIST traceable factory calibration performed to obtain the calibration factor and dead time correction for the detector. The calibration factor and dead time correction (referred to -as TAU) are stated on the factory calibration data sheet, and are adjusted via setpoint numbers 5 and 2 on the 956A UDR. A field test source, P/N 848-8, is available as an option to verify detector operation. The detector, with integral 'preamplifier, should be returned, to Victoreen for recallbration whenever 'performance degradation is noticed (i.e. detector response is not within +/- 30% of the decayed source value in either the closed oropen position.)

Calibration I Electronic Adiustment Table 6-1 lists the electronic adjustments for the 956A, while Table 6-2 lists electronic adjustments for the 897A detector. The procedures for making these adjustments are contained in the factory calibration and test procedures listed below.' Note that test firmware is required to perform most of the critical adjustments. Refer to Section7 for a description of user performed adjustments.

NOTE The adjustments listed in Table 6-1 and Table 6-2 are for standard equipment. If an analog output option board has been furnished with the ratemeter, refer to the analog output option board instruction manual for additional adjustment instructions.

Table 6-1. Electronic Adjustments, UDR Adjustment Purpose Type VR1 Zero Adjust / 0 - 10 Volt Analog Output Field VR2 Gain Adjust / 0 - 10 Volt Analog Output "'Feld VR4 20 mA Adjust /4 - 20 mA Volt Analog Output #1 Field VR5 20 mA Adjust / 4 - 20 mA Volt Analog Output #2 Field VR6 4 mA Adjust / 4 - 20 mA Volt Analog Output #2 Field VR7 4 mA Adjust / 4 - 20 mA VoltAnalog Output #1 Field VR8 Gain Adjust / Signal Input Op Amp , - I I Factory VR9 DC Offset Adjust / Signal Input Op Amp Factory VR10 High Discriminator Adjustment Field VR11 Low Discriminator Adjustment Field VR12 Anti-Jam Threshold Adjust Factory VR13 Write Cycle Clock Adjust Factory HV Supply R5 - High Voltage Adjust 'Field VR51 +5 VDC Power Supply * -Field Table 6-2. Electronic Adjustments, Detector Adjustment Purpose Type R44 Detector Input Discriminator Factory R41 Anti-Jam Threshold (Factory Adjustment Only) Factory The following factory calibration and test procedures are included for reference at the end of this section:

Document Description CAL-GM1 Factory Calibration Procedure, 897A GM Detector TP897A Factory Test Procedure, 897A GM Detector TP956A-201 -3 956A-201 Digital Ratemeter Factory Test Procedure TP956A/897A-21 X Loop Test Procedure - Low Range Detector TP956A/897A-22X Loop Test Procedure - Medium Range Detector TP956A/897A-23X Loop Test Procedure - High Range Detector 6-1

955A System Field Calibration A field test source is available to verify the response of the detector to a known radioactive field in a fixed geometry. The following test sources are available:

Model Activity 848-8 100 mCi Cs-137 848-8A 20 mCi Cs-137 848-8 Test Source provides tree data points when used with the 897A-22X or 897A-23X detector.

Two points are available when used with the 897A-21X, low range detector. Should a third data point be required for the 897A-21X detector, use of the 848-8A Test Source is required.

The following adapters are required to use the above test sources:

Detector Adapter 897A-210 848-8-105 897A-220 848-8-105 897A-230 848-8-105 897A-211 848-8-105 & 848-8-400 897A-221 848-8-105 & 848-8-400 897A-231 848-8-105 & 848-8-400 11WARNING 1 Extreme care must be used when testing a system that has power applied. A 600 Vdc potential exists on terminal P1-10 of the detector and P4 of the 956 UDR. This potential will exist for one minute after power is removed.

I CAUTION For WARNINGS and CAUTIONS pertaining to the use of the Model 848-8 field calibrator, refer to the applicable field calibrator instruction manual.

NOTE Voltages can be measured as soon as power is turned on, but further alignment should not be attempted until the instrument has had at least one hour to stabilize after startup.

NOTE The following procedure applies only to an 897A series detector that has been previously calibrated and is functioning normally.

6-2

NOTE If a question arises on the use of the field calibrator or the adapter, refer to the applicable instruction manual for the calibrator or adapter.

NOTE By using two field calibrators in three positions each .(open, closed, and intermediate) a total of six different exposure levels can be obtained. Select from these exposure levels -the ones that correspond to the levels listed In Table 6-4.

1. To use the test source, determine the current radiation intensity for the closed, intermediate, and open positions from the decay curves on the field calibrators. Determine upper and lower tolerance limits by taking -75% and 125% of each intensity level.

WARNING Do not turn the key of the field calibrator, until instructed to do so.

-Failure to comply may result In radiation exposure to the operator.

2. Insert the applicable adapters into the field test source.

3. Insert the applicable 897A detector, small end down, into the field source adapter.

4. Insert the key, DO NOT turn.

5. Record the displayed value (this is the CLOSED position).

"NOTE To put the field calibrator in the open position, the detector must be installed in the calibrator. Insert the key and turn It. Rotate the hand knob fully. The detector is fully exposed to the radiation source.. This is the OPEN position To put the field calibrator in the intermediate position, start from

,the closed position and hold a counter-clock-wise pressure on the

.key while rotating the knob to the open position. A stop will be felt before the open position 'is,reached. This is the Intermediate Position.

6. Turn the ,key, and rotate the control lever.until the Intermediate position stop is felt.

Record the reading.

NOTE The detector cannot be removed until the field calibrator is put back to the closed position and the key is removed.

7. Turn the control lever to the full counter-clockwise, or OPEN position. Record the reading.

8. Remove the detector from the field calibrator.

9. The values recorded in steps 5, 6, and 7 should be between the values calculated in step 1.

NOTE If the values recorded are not within the calculated range, then the detector is out of calibration. Return the detector to Victoreen for evaluation and determination of proper course of action. Do not attempt to change the conversion constant to "fit" the readings.

6-3

Detector Calibration Plateau Verification NOTE Plateau verification does not need to be performed If the detector Is supplied with a calibration data sheet, identifying the factory high voltage setting.. It may, however, be performed as a preventative maintenance test for monitoring changes In the length of the detector plateau over time. It should be performed If the detector calibration data sheet is not available. If the detector is a replacement part, the high voltage should be set to the value shown on the calibration data sheet supplied with the detector.

To determine the optimum high voltage setting for the GM detector, perform the following:

1. Connect an electrostatic voltmeter to the high voltage section of the readout. Adjust the high voltage to 500 Vdc.

2. Connect a counter to the input pulse circuitry at the readout. Adjust the counter for a 1 minute time base.

3. Place a source near the detector and position It so that a reasonable count rate will be displayed on the readout.

4. Using the counter, take a 1 minute count. Record the high voltage setting and the gross count rate.

CAUTION Do not exceed 650 Vdc under any condition. Damage to the GM tube will occur.

5. Repeat step 4, increasing the voltage in 20 Vdc increments until the maximum operating voltage is reached.

6. Plot the resulting data, gross count rate vs. high voltage. Locate the plateau where the slope is minimized ( between the minimum voltage of 500 Vdc and the maximum voltage 650 Vdc).

The operating point should be the mid point of this plateau. Figure 6-1 is an example of the detector plateau

7. If the plat3au is not within the 500 Vdc to 650 Vdc range, return the unit to Victoreen for GM tube replacement and factory NIST source range calibration.

6-4

I I 1000 ..

HIGH VOLTAGE S10 0 u* -"525 545 r=:

I- 565 585 o 605 U) 625 U' 10 0 645 DISCRIM INATO Operator Point!

1 1 1 1 1 in L) I) Ln in U) LI LI) in U) LA Co 0 N 0 CD 0" 0 IND C LI) in Ll) Ln Ln HIGH VOLTAGE (VOLTS)

Figure 6-1. Detector Plateau (Typical) 5

(BLANK PAGE) 6-6

'VICTOREEN, INC.

iTLE: GM DETECTOR CALIBRATION FOR AREA MONITORING SYSTEMS CUSTOMER: N/A - -PAGE DOCUMENT:. CAL-GM1. REV.. F

• 1 OF, 11 ISSUE DATE: SEPTEMBER 11, 1991 REVISION LIST REV -ECO#-,,.

F 11CR1-94

-.. . APPROVAL MANAGER, RELIABILITY ENGINEERING GENERAL MANAGER, SYSTEMS Q .A.

CALIBRATION SUPERVISOR

'SUED BY: D. WARNER cal/d#2/cal-gml.doc

VICTOREEN, INC.

TITLE: GM Detector Calibration For Area Monitoring Systems CUSTOMER: N/A DOCUMENT: CAL-GM1 REV. F DOCUMENT REV. LEVEL DESCRIPTION/PAGES AFFECTED A ORIGINAL ISSUE B Change position 4,- 0 and 1 filter page 4 General revision to comply with S.O.P.

C 450.001; pages 3 through 8 Add sign-off line for physicist on pages 6-8 D *to background on pages 6-8 General revision to incorporate MICR use and computer data sheets. Added 857 &

E 857A Detectors; pages all.

Correct typographical errors, clarify F 94085701 usage and delete cal. points.

cal/d#2/cal-gm1 .doc 2

YVICTOREEN, INC.

TITLE: GM Detector Calibration For Area Monitoring Systems CUSTOMER: N/A

")OCUMENT: CAL-GM1 REV. F 1.0 SCOPE 1.1 To develop calibration data for the detector so that parameters can be determined for use with the 960' based Digital Area Monitor or 956 Series' Area Monitor Readouts and to set or verify the detector's anti-jam function. In addition, the performance of 857 Series detectors used with Analog Area Monitors or provided as replacements will be verified. Consult Reliability Engineering for detector types not covered by this procedure.

1.2 The pararneters that will be determined by this procedure are:

Conversion Constant Dead Time Correction Background Countrate Linearity 2.0 RESPONSIBILITIES 2.1 Personnel performing this procedure must have a skill level per S.O.P. 902.003 of Level 1.

2.2 QA has the responsibility to insure that this procedure is properly, implemented and that all data is reviewed and approved prior to movement of material to the next work station.

3.0 ENVIRONMENTAL CONDITIONS 3.1 Environmental conditions for temperature and humidity are the prevailing laboratory ambient.

cal/d#2/cal-gml .doc 3

VICTOREEN, INC.

TITLE: GM Detector Calibration For Area Monitoring Systems CUSTOMER: N/A DOCUMENT: CAL-GM 1 REV. F 4.0 EQUIPMENT REQUIRED 4.1 Digital Voltmeter (DVM), must be calibrated.

4.2 Oscilloscope 50MHz min. band width, must be calibrated.

4.3 956 or 956A Digital Readout Module, must be calibrated.

4.4 Calibrated Source Ranges (TRI-SOURCE and MICR or SICR).

4.5 Computer and Disc containing program 94085701 Rev. B for GM Area Monitors.

4.6 Mounting Fixtures for detectors in TRI-SOURCE and SICR as required.

4.7 956 to 857 Adaptor Cable (857-X,857-XX & 857A-XXX only)

)

4.8 857-X or 857A-XXX Adaptor Cable if required.

4.9 Data Sheets. (Sample attached. These sheets delineate the minimum recordin requirements; other data sheets may be used as long as the minimum information is recorded)

5.0 REFERENCES

5.1 Procedure CAL-TRI-SOURCE.

5.2 Procedure CAL-MICR or CAL-SICR as required.

cal/d#2/cal-gm 1.doc 4

VICTOREEN, INC.

TITLE: 'GM Detector Calibration For.Area Monit6rinij Systems CUSTOMER: N/A r)OCUMENT: CAL-GM1 REV. F

.6.0 PROCEDURE. ,

6.1 Configure Readout device as shown in Table 1.

TABLE 1 Detector Type High Voltage Low Disc. High Disc.

_....857-1X,2X ._600_Hg 0.500 7.00

'857-3X - 550 - 0.500 7.00 857-X1XX25:00 -- 050 7.00 857A-X-1 X,X2X --600- 0.500 7.00 1897-X1X,X2X 600 0.500 7.00 897-X3X I 550 0.500 7.00 NOTE .

-Anti-jam-function on Readouts used for calibration should be -disabled by removing Jumper JP7 and placing JP6 in the 2 3-position.

6.2,- Mount detector in TRI-SOURCE using Adaptor Fixture 'andc allow 15 minute warm up period for detector and all electronics prior to.data -collection. Adjust Table height so that the laser spot is located on the detector housing centerline.

NOTE For 857-XX and 857A-XXX detectors, the 857 to956 adaptorcable must be used.

Verify that Check Source switch on the adaptor cable is in the OFF position.

6.3, *For 897-XXX detectors,- verify-the detector's internal discriminator is adjusted to

-,0.500,volts +/- 0.01 volts. Discriminatbfrvolta'ge is measured between pin 9 (+)

and pin 8 (-) of I.C, Zl.-,,Adjust potentiometer R44 if required and record value on Data Sheet. Verify that jumpers J1, J2 and J3 are all in the'A-"B position.

• ,** -'-"  ;-. " *NOTE".

857-XX and 857A-XXX detectors do not have an internal discriminator adjustment.

6.4 Connect Oscilloscope to signal input-,of Readbiut -devi6e using X 0 probe. Set Oscilloscope vertical gain to 1 volt/division, DC coupled and a sweep, rate of 5 microseconds/divisiomn Set, triggering 'to internal- and adjust- triggering- after the detector is exposed to the source.

cal/d#2/cal-gml .doc 5

VICTOREEN, INC.

TITLE: GM Detector Calibration For Area Monitoring Systems CUSTOMER: N/A DOCUMENT: CAL-GM1 REV. F 6.5 Using the TRI-SOURCE in accordance the instructions in Procedure CAL-TRI SOURCE, expose the detector per Table 2 for anti-jam adjustment or verification.

Record anti-jam frequency in CPM and 50% duty cycle/5volt square wave output verification on Data Sheet.

NOTE Anti-jam trip point is adjusted in 897-XXX detectors via potentiometer R41 (CCW decreases trip point). For 857A-XXX detectors, trip point is adjusted via R23. For 857-XX detectors, trip point is set by fixed resistor R4.

TABLE DETECTOR TYPE REQUIRED FIELD INTENSITY 857-1X 857A-X1X 3.09E3 to 3.22E3 mR/h 897-X1 X 857-2X 857A-X2X 3.07E4 to 3.20E4 mR/h 897-X2X 857-3X 857A-X3X 2.45E5 to 2.55E5 mR/h 897-X3X 6.6 Place the 956 Readout function switch in position 8 (Calibrate Mode) to enter the required count time in seconds as noted on the Data Sheet.

6.7 Using the Calibration Sources in accordance with instructions in procedures CAL TRI-SOURCE and CAL-SICR or CAL-MICR, expose the detector in accordance with Tables 3, 4, or 5 depending on detector type. Begin counting only after the source if fully open or raised.

6.8 Using computer and program 94085701 Rev. B, enter NET count rates to determine Dead Time Correction value and Conversion Constant and record on Data Sheet. Attach print-out to Data Sheet. Acceptance Criteria is a value of less than 20% for linearity error. If information is available, enter Customer, S.O. Number, etc., into 94085701 program.

6.9 Place the 956 Readout function switch in position 5 and enter the Conversion Constant (CC1). Move the function switch to position 2 and enter the Deadtime (TAU) value.

cal/d#2/cal-gml .doc 6

VICTOREEN, INC.

TITLE: GM DetectorCahlibration For Area Monitoring Systems CUSTOMER: N/A DOCUMENT: CAL-GM1 REV. F 6.10 Place the Detector in the minimum background position and activate the check I-- . -

source.

- Record the check-'source reading on the Dat;a .Sheet.

NOTE For 897-XXX detectors the 956A check source front panel switch is used. For 857

-ora857Ak series the check source switch °is located on the 956/857 interface

-, adaptorand the 956A check-source switch non functional. ,., -

- 6.1 1-:Forward -Data Sheet and -print-out-to Physiciif for approval and insert' in the Sdetector Traveller (if applicable) when completed.

--7.0 DOCUMENTATION - ,  ::,- - -- "

" 7.1'- Computer generated Data Sheetsmay be used for Source-Range--and Set-up-Data.

- A legible copy, of the Curve Fit..printout shall be -attached-to the -Data Sheet. A copy'of these data sheets will be forwarded to the Staff Physicist.

7.2,. Wheni a detector- is accepted into stock, -the Data Sheets-s Ihall -remain -with the detector. - - ,- - - - - - --.. ... . ... .

7.3 When a detector is assigned to a job,'-the Traveller (if applicable) shall-be completed with the P.O. number and any other appropriate customer identification.

7.4 When a job'is shipped,' reco~ds-shlf-Ibe retain'ed -b' ;QA 'appro'priately filed and microfilImed.

cal/d#2/cal-gml .doc 7

VICTOREEN, INC.

TITLE: GM Detector Calibration For Area Monitoring Systems CUSTOMER: N/A DOCUMENT: CAL-GM1 REV. F TABLE 3: To be used with 857-3X, 857A-X3X and 897-X3X Detectors CALIBRATION POINT MINIMUM FIELD STRENGTH j MAXIMUM FIELD STRENGTH

1. 1 9.50E4 mR/hr 1.00E5 mR/hr

1. 2 3.00E4 mR/hr 4.00E4 mR/hr

1. 3 9.50E3 mR/hr 1.20E4 mR/hr

1. 4 3.00E3 mR/hr 4.00E3 mR/hr

1. 5 9.50E2 mR/hr 1.20E3 mR/hr

1. 6 3.00E2 mR/hr 4.00E2 mR/hr

1. 7 9.50E1 mR/hr 1.20E2 mR/hr

1. 8 3.OOE1 mR/hr 4.OOE1 mR/hr TABLE 4: To be used with 857-2X, 857A-X2X and 897-X2X Detectors CALIBRATION POINT MINIMUM FIELD STRENGTH MAXIMUM FIELD STRENGTH

1. 1 9.50E3 mR/hr 1.00E4 mR/hr

1. 2 3.00E3 mR/hr 4.00E4 mR/hr

1. 3 9.50E2 mR/hr 1.20E3 mR/hr

1. 4 3.00E2 mR/hr 4.00E2 mR/hr

1. 5 9.50E1 mR/hr 1.20E2 mR/hr

1. 6 3.OE1 mR/hr 4.OOE1 mR/hr

1. 7 9.50E0 mR/hr 1.20E1 mR/hr

1. 8 3.OOEO mR/hr 4.OOEO mR/hr

1. 9 9.50E-1 mR/hr 1.20E0 mR/hr TABLE 5: To be used with 857-1X, 857A-X1X and 897-X1X Detectors CALIBRATION POINT MINIMUM FIELD STRENGTH MAXIMUM FIELD STRENGTH

1. 1 9.50E2 mR/hr 1.00E3 mR/hr

1. 2 3.00E2 mR/hr 4.00E2 mR/hr

1. 3 9.50E1 mR/hr 1.20E2 mR/hr

1. 4 3.OOE1 mR/hr 4.OOE1 mR/hr

1. 5 9.50E0 mR/hr 1.20E1 mR/hr

1. 6 3.OOEO mR/hr 4.O0EO mR/hr

1. 7 9.50E-1 mR/hr 1.20E0 mR/hr cal/d#2/cal-gm 1.doc 8

"TITLE: GM'Detector CalibratioiinforArea MonitoringSystems DOCUMENT: CAL-GMI REV. F ATTACHMENT A 897-XlX DETECTOR-DATA SHEET Customer ..- P.O.- #

Pro~ect-*Project .-w.O.

.W.O. --#

--P S.O. #

-Detector Model # 897-210 -Serial # Tag #

Readout Model # 956-100 Serial # - 137 Cai Date 6.3 Detector Discriminator 'NA volts C 897 ONLY 6.5 Anti-Jam Duty Cycle Verification- "  ? " (Pass/Fail)

Intensity- Position &-No. 'Count Time Accumulated Gross --,Net

.(mR/h) Of Attenuaters (sec) Counts Counts' Count Rate

( cpm ) (°cpm S.I.C.R.- CALIBRATION INFORMATION BACK GROUND -41 mR/h & 5 Attn's 300-????'P??????*0.00E+O0" N/ A 5 -41 mR/h & 3 Attn's 240 ???"7????????-0.00E+O0 0

,3.6 7 41 mR/h & 2 Attn's 240 ???????????? 0.OOE+00 0

11.7 41 mR/h & 1 Attn 240 ???????????? 0.OOE+00 0

-- TRI SOURCE'CALIBRATION'INFORMATION

34. 5, 10 R/h & 5 Attn's 120 ???????7????? 0.00E+O0 102. 2 10 R/h & 4 Attn's 120 ??????????0.OOE+00 31:2- 10 R/h & 3-Attn's 120 ???-...?????? 0.OOE+0O 95: 3 10 R/h & 2 Attn's 60' ???????????? 0.OOE+O0 315(0 -10 R/h & 1 Attn 60- Ant'i "Jam - ????'??

N/A 6.10 -Check Source Response???????????? mR/h Conversion Constant  ????,??? Dead Time Correction ....

Conducted By Q.A. Review By Cal Date Date 225:GM1-6

TITLE: GM Detector Calibration for Area Monitoring Systems N C DOCUMENT: CAL-GM! REV. F ATTACHMENT A 897-X2X DETECTOR DATA SHEET Customer P.O. #

Project W.O. #

S.O. #

Detector Model # 897-210 Serial # Tag #

Readout Model # 956-100 Serial ? 137 Cal Date 6.3 Detector Discriminator NA volts ( 897 ONLY )

6.5 Anti-Jam Duty Cycle Verification  ? (Pass/Fail' intensity Position & No. Count Time Accumulated Gross Net (mR/h) Of Attenuaters (sec) Counts Counts Count Rate

( cpm) ( cpm )

S.I.C.R. CALIBRATION INFORMATION BACK GROUND 41 mR/h & 5 Attn's 300 ???????????? 0.00E+00 N / A 1.15 41 mR/h & 3 Attn's 240 ???????????? 0.OOE+00 0 3.67 41 mR/h & 2 Attn's 240 ???????????? 0.OOE+00 0 11.71 41 mR/h & 1 Attn 240 ?????????? 0.00E+00 0 TRI SOURCE CALIBRATION INFORMATION 34.5 10 R/h & 5 Attn's 120 ??????????"? 0.OOE+00 102.2 10 R/h & 4 Attn's 120 ???????????? 0.OOE+00 312 10 R/n & 3 Attn's 120 ??????????'? 0.OOE+00 953 10 R/h & 2 Attn's 60 ???????????? 0.OOE+00 3150 10 R/h & 1 Attn 60 Antl Jam  ???????? N/ A 6.10 Check Source Response????? ?'???? mR/h Conversion Constant  ??7'7"79-Dead Time Correction  ?

Conducted By Q.A. Review By Cal Date Date 225:GM!-6

'*.rL[TLE: GM Detector Calibration for Area Monitoring Systems DOCUMENT: CAL-GMI REV. F ATTACHMENT A 897-X3X DETECTOR DATA SHEET Customer P.O. No.

Project W.O. No.

S.O. No.

Detector Model # 897-3 Serial # Tag #

Readout Model # 956-100 Serial # Cal Date 6.3 Detector Discriminater- volts ( 897 ONLY 6.5 Anti-jam Duty Cycle Verification (Pass/Fail)

Intensity Position & No. Count Time Accumulated Gross Net (mR/h) Of Attenuaters (sec) Counts Counts Count Rate S.I.C.R. Calibration Information ( cpm ) ( cpm )

BACK GROUND 41 mR/h & 5 Attn's 300 0.OOE+O0 N l.A 11.71 41 mR/h & 1 Attn 240 O.OOE+O0 0 TRI SOURCE CALIBRATION INFORMATION 34.5 10 R/h & 5 Attn's 120 0.OOE+O0 0 102.2 20 R/h & 4 Attn's 120 0.OOE+O0 0 383 100 R/h & 5 Attn's 60 0.OOE+O0 0 1120 100 R/h & 4 Attn's 60 0.00E+O0 0 3310 100 R/h & 3 Attn 60 O.OOE+O0 0 9940 100 R/h & 2 Attn 60 0.O0E+00 0 31400 100 R/h & 1 Attn 60 O.OOE+O0 0 98800 100 R/h & 0 Attn 60 0.OOE+O0 0 250000 250 R/h & 0 Attn 60 Anti Jam N / A 6.10 Check Source Response mR/h Conversion Constant "Dead Time Correction Conducted By Q.A. Review By Cal Date Date 225: GM1-6

VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR 897A-2X0 AND 897A-2X1 DETECTORS PAGE CUSTOMER: N/A 1 OF 12 DOCUMENT: TP897A REV. A ISSUE DATE:.-, NOVEMBER 10, 1995 r REVISION LIST REV ECO#

A 9CR28-95 APP*VAL DATE PROJECT ENGINE ER TECHNICAL SUPPORT MANAGER QUALITY-AS SUWRANCE ISSUED BY: DAVID WARNER tp/d#48/TP897A.doc

- .f

I VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR 897A-2X0 AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A REV. A RECORD OF REVISIONS DOCUMENT REV. LEVEL DESCRIPTION/PAGES AFFECTED A ORIGINAL ISSUE I

tp/d#48/TP897A.doc 2

VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR 897A-2X0 AND 897A-2X1 DETECTORs CUSTOMER: N/A DOCUMENT: TP897A REV. A TABLE OF CONTENTS Section Description . Page 1.0 PURPOSE ............................... ..................... 4 2.0 SCO PE ............................................................................ 4 3.0. RESPONSIBILITIES-......................................... 4 4.0 . "ENVIRONMENTAL CONDITIONS ... .................................. 5 5.0 EQUIPMENT REQUIRED..............................5 6.0 PROCEDURE .................................. .............................. 6 4 U tp/d#48/TP897A.doc St -3 L

VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR 897A-2X0 AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A REV. A 1.0 PURPOSE 1.1 The purpose of this procedure is to verify the proper operation of the model 897A-2XX series of GM area monitor detectors prior to source range calibration.

2.0 SCOPE 2.1 This procedure is to be performed on all 897A-2X0 and 897A-2X1 series detectors prior to source range calibration to insure proper set up and function. This procedure shall apply to production detectors as well as those received for repair or calibration. The following items are verified or adjusted by this procedure:

2.2 Detector current draw and local regulation.

2.3 Jumper placement.

2.4 Anti-jam function and range adjustment.

2.5 Discriminator range adjustment and final setting.

2.6 Detector output pulse height, period and symmetry.

2.7 Detector background countrate.

2.8 Check source operation in all positions of mounting.

3.0 RESPONSIBILITIES 3.1 Personnel performing this test must have a Technicians Skill Level 1 per S.O.P. 902.003.

3.2 Data generated by this test must be reviewed and approved by Q.A.

prior to shipment. In addition, Q.A. has the responsibility of maintaining individual board test data in a job file.

tp/d#48/TP897A.doc .... 4

VICTOREEN, INC.

TITLE: C ELECTRONIC TEST PROCEDURE'FOR'897A-2Xo AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A , REV. A 3.3 The completed Data Sheet shall accompany, the detector 2to the calibration range.

.4.0 ENVIRONMENTAL CONDITIONS ,

4.1 Environmental conditions shall-be the prevailing laboratory ambient for temperature and humidity. Radiation :background, levels shall not exceed 50 uR/h for the background check portion of this procedure.

5.0 EQUIPMENT REQUIRED 5.1 100, MHz Oscilloscope: Tektronix' 465B or equivalent must be calibrated and equipped With a XI 0 probe.'-

5.2 956A-201 Digital Ratemeter (UDR).

5.3 Digital Voltmeter. (DVM): Fluke 8050A or equivalent - must be a calibrated device . , -I ' - - _-- - -

5.4 Test Data, Sheets as attached:

,5.5 Interconnection cable from 956A-201 to-89TA series detector. Refer to Loop Diagram 956A-201-106.

5.6- 'Jumpers and test leads as lequired.-

5.7 Precision DC voltage source or adjustable power supply: nominal 0-10 Svolt range.,

"5.8 IC test extended - 14 pindual in-line package."-

tp/d#48/TP897A.doc 5

VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR 897A-2X0 AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A REV. A 6.0 PROCEDURE 6.1 Initial set-up of device under test and test equipment.

6.1.1 Record Customer, P.O. and S.O. (or W.O.) numbers on the Data Sheet. Record detector -assembly serial number and circuit board revision level and serial number on the Data Sheet.

6.1.2 Record the model, serial number and the calibration due date of the digital voltmeter and oscilloscope on the Data Sheet.

NOTE: The majority of the steps in this procedure are performed with the detector outer housing removed. Use caution as high voltage (575 volts) is present in some areas of the circuit board.

6.1.3 Adjust the high voltage supply on the 956A-201 to be used to 575 volts. Adjust the 956A-201 lower discriminator (VR1 1) to 0.50 volts and the upper discriminator (VR10) to 7.0 volts.

6.1.4 Turn off 956A-201 power and connect the 956A-201 to the 897A detector to be tested using the cable referenced in 5.5 of section 4.0. Do not connect the high voltage connector to 956A-201 P4 (HV) at this time.

6.1.5 Remove jumper J3 from the header block on the 897-210-10 circuit board.

6.1.6 Place the DVM in the current measuring mode (200 mA range) and connect the DVM negative lead to J3-A. Connect the DVM positive lead to J3-B.

6.2 Detector Quiescent Current Drain 6.2.1 Apply AC power and allow a five minute warm-up period to elapse prior to proceeding.

tp/d#48/TP897A.doc 6

- - -,' -b

VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR 897A-2XO0AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A REV. A 6.2.2 Record the DVM 'current indication'o6n06he Data -Sheet. The value must be less than 100 Ma. Turn off 956A-201 ratemeter power When this measurement'has been completed and replace jumper J3 into the A-B position.

6.3 ,,Jumper placement and local'regulator Operiation 6.3.1 Record verification'on the Data Sheet that jumpers J1, J2 and J3 are all in the A-B positions.

6.3.2 Turn 956A-201 ratemeter power back on and allow a five minute warm-uýp to elapse prior to proceeding.'

6.3.3 Connect the Digital' Voltmeter '(DVM) negative lead to the negative side of Cl (DC ground) and the positive lead to cathode of CR9. Verify 10 +1/- 0.5 volts and record verification on the'Data Sheet.

6.4 Anti-jam Adjustment Range and Pre-calibration Setting.

6.4.1 Place the IC test extender over Z1 on the 897A-210-10 circuit board.

6.4.2 Connect the DVM negative lead to Z1 pin 12 and the DVM positive lead to Z1 pin 10.

6.4.3 JAdjust potentiometer R41 fully'couinter-clockwise and verify a DVM indication of < 0.100 volts. 'Record the final reading on the Data Sheet.

6.4.4 Adjust potentiometer R41 fully clockwise and verify a DVM indication of > 2.9 volts. Record the final reading on the Data Sheet.

6.4.5 Adjust R41 'for a DVM indication of 1 +/- 0.001 volts.

Record the final setting on the Data Sheet. This value is the anti-jam starting threshold voltage.

tp/d#48/TP897A.doc 7

VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR 897A-2X0 AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A REV. A 6.5 Discriminator Adjustment Range and Final Setting.

6.5.1 Move the DVM negative lead. to Z1 pin 8 and the DVM positive lead to Z1 pin 9. Adjust potentiometer R44 fully counter-clockwise and verify a DVM indication of < 0.100 volts. Record the final reading on the Data Sheet.

6.5.2 Adjust potentiometer R44 fully clockwise and verify a DVM indication of > 1.5 volts. Record the final value on the Data Sheet.

6.5.3 Adjust potentiometer R44 for a DVM indication of 0.5 +/

0.01 volts and record the final setting value on the Data Sheet. This is the factory discriminator setting for all standard 897A detectors.

6.6 Anti-jam Trigger Threshold Verification.

6.6.1 Set the output of the precision voltage source or power supply to zero and connect the negative lead of the supply to the negative side of C1 (DC ground). Connect the positive lead of the supply to the ANODE of CR7.

6.6.2 Connect the DVM across the precision DC volt source to monitor the output. Set the range to 2 volts DC.

6.6.3 Connect the oscilloscope ground lead to the negative side of C1 (DC ground) and the probe to the junction of resistors R1 and R2 on the 897A-210-10 circuit board. Set the oscilloscope as follows:

Vertical gain: 1 volt/division Input coupling: DC Trigger mode: Auto Sweep rate: 5 uS/division tp/d#48/TP897A.doc 8

VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR,897A-2X0 AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A REV. A 6.6.4 Increase the supply -output -until the oscilloscope displays the anti-jam square wave'output from the detector. Adjust the DC supply as required to determine the exact point of anti-jam START. When this point has been determined, record the DVM indication on the Data Sheet. The value displayed must be 1 +/- 0.01 volts.

6.7 Detector Output Pulse Height, Period and Symmetry.

6.7.1 With the detector remaining in the 'anti-jam state, verify a symmetrical square wave of > 4.5 volts peak with a period of less than 25 uS. Record the peak value of the output and the period noted on the Data Sheet.

6.8 Check Source Operation and Background Check.

6.8.1 Set the supply output to zero and disconnect the supply from the detector.

6.8.2 Turn off power to the 956A-201 ratemete rand connect the high voltage coaxial cable to the rear panel P4 jack. Turn ratemeter power back on after this connection has been made.

6.8.3 Verify that the check source is in the OFF position, that is the brass pan will be over the circuit board and not the hole over the GM tube.

6.8.4 With the check source in the OFF position, place the function switch 956A-201 in position #8 and enter a 1 minute (6.OOE1 second) count of the GM tube background. The background value must be greater than 1 CPM but less than 25 CPM. If a higher than allowable background value is counted, recheck the actual background of the area where testing is being performed. If the results are still not acceptable, replace the GM tube and repeat this step after a 15 minute warm-up period. Record the final background countrate on the Data Sheet.

tp/d#48/TP897A.doc 9

VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR 897A-2X0 AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A REV. A 6.8.5 Move the 956A-201 function switch out of position #8 and depress the check source push-button. Verify that the check source moves to the ON position over the hole in the circuit board. Repeat this test with the detector GM tube pointing upward, downward and in 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock horizontal positions. The source must activate in each position. Record verification of source activation on the Data Sheet for each of these six positions.

6.9 Re-install the detector into the housing and secure with at least one screw. Forward to the calibration department for source range calibration all detectors which have passed this procedure along with the Data Sheets.

6.10 Reject and repair/rework any detectors which have failed this procedure and re-test when repairs have been completed.

6.11 Obtain Q.A. review of completed detectors and Data Sheets which have passed this procedure. Forward accepted units, with completed Data Sheets, to the Calibration Department for source range calibration.

tp/d#48/TP897A.doc 10

VICTOREEN, INC.

TITLE: -ELECTRONIC TEST PROCEDURE FOR,897A-2X0 AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A REV. A Junction R1 & R2 ....

MoOel, Senal rNurmDer and Revision Cl GM Tube zi FIGURE 1 897A-210-10 Circuit Board tp/d#48/TP897A.doc 11

.1

VICTOREEN, INC.

TITLE: ELECTRONIC TEST PROCEDURE FOR 897A-2X0 AND 897A-2X1 DETECTORS CUSTOMER: N/A DOCUMENT: TP897A REV. A Test Data Sheet TP897A for 897A-2X0 and 897-2X1 Detectors Customer: P.O. No.:

S.O. No.: W.O. No.:

Model 897A- Serial No.:

897A-21 0-10 Circuit Board Serial No.: Revision Level:

Test Equipment Oscilloscope Model No: SIN: Cal Due Date:

Digital Voltmeter Model: : _ _S/N: Cal Due Date:

Test Results 6.2.3 Detector Quiescent Current Draw mA (100 mA max.)

6.3.1 Jumper Placement J1 (A-B),J2 (A-B),J3 (A-B) 6.3.3 Local Zener Regulation v (>9.5 and < 11.0 volts) 6.4.3 Anti-jam minimum setting v (< 0.100 volts).

6.4.4 Anti-jam maximum setting v ( > 2.9 volts) 6.4.5 Anti-jam final setting v (1 +/- 0.001 volts) 6.5.1 Discriminator minimum setting _ _ v( < 0.100 volts) 6.5.2 Discriminator maximum setting v ( > 1.5 volts) 6.5.3 Discriminator final setting _v ( 0.5 +/0 0.01 volts) 6.6.4 Anti-jam trigger threshold v(1 +/- 0.01 volts) 6.7.1 Detector output pulse height v peak (4.5 minimum)

Output square wave period uS (25 uS maximum) 6.8.4 Detector background CPM

(> 1CPM/ < 25 CPM) 6.8.5 Check source activation:

GM Tube up _ (yes) 12 o'clock _ (yes) 6 o'clock _ (yes)

GM Tube down _ _(yes) 3 o'clock _ (yes) 9 o'clock (yes)

Performed By: Date:

Q.A. Review By: Date:

tp/d#48/TP897A.doc * -12

INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 .

UNIVERSAL DIGITAL RATEMETER PAGE CUSTOMER: N/A 1 OF 27 DOCUMENT: TP956A-201-3 REV. 4 ISSUE DATE: IJIl REVISIONLIST REV ECO#

-4 9CR48-99

,___ _ _ _ _ _ __-_ _APP L DATE RELIABILITY ENGINEER 11-1/2-9,9 MANUFACTURING ENGINEER -

REGULATORY AFFAIRS ENGINEER __________

ISSUED BY: GEORGE BUCK tp/d#49/956A2013.doc FILE -COPY

INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 RECORD OF REVISIONS DOCUMENT ECO REVISION LEVEL NUMBER DESCRIPTIONIPAGES AFFECTED A Original Issue (Adapted from TP942-100-3)

Revised/Renumbered Table of Contents; Paragraph 9.4, Added New Section; B 5CR52-96 namely, Anti Jam Bit Test, Renumbered remaining sections and paragraphs; Revised/Renumbered Pages 1 through 4 1of Test Data Sheet Corrected- Anti-Jam Test Signal Input to C 10CR28-97 55 Khz, Para. 16.5; Added Note to Para 2.0, and Para 4.14, for use on 956A-200 units.

4 9CR48-99 Added M&TE use to "SCOPE"; added second 4-20 mA column to Data Sheet ;

deleted 956A-200 applicability from "SCOPE" FiLe. CoPy tp/d#49/956A2013.doc 2

INOVISION RADIATION MEASUREMENTS TITLE: , TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 TABLE OF CONTENTS I Section Description Page 1.0 PURPO SE ............................................................................................. 4 2.0 SCOPE ............................................... 4 3.0 RESPONSIBILITIES ............................................................................. 4 4.0 EQUIPMENT REQUIRED ... .......... .......... ................... 4 5.0, "SET-UP (See Figure 1) ......................... I.... ....... 6 6.0 WRITE CLOCK ADJUSTMENT .......................................................... 10 7.0 DISCRIMINATOR ADJUSTMENT ....................................................... 10 18.0 INPUT AMPLIFIER ADJUSTMENT ................................ ........ 11 9.0 ANTI-JAM ADJUSTMENT ................................................................... 12 10.0 TEST 1: RAM TEST ............................................................................ 12 11.0 TEST 3: BAR GRAPH TEST .............................................................. 13 TEST 4: DISPLAY TEST ........ . ...................................... 13 13.0 TEST 5: SW ITCH TEST ..................................................................... 13 14.0 TEST 6: INDICATOR/BACKLIGHT/FAIL TEST ................................. 14 15.0 TEST 7: COUNTER/DISCRIMINATOR TEST .................................... 14 16.0 ANTI JAM BIT TEST ............. ...................................................... 16 17.0 TEST 8: D/A CONVERTER 4-20 mA/0-10 V OUTPUT TEST ............. 17 18.0 TEST 9: EEPROM TEST .................... ........... .... ................... 18 19.0 TEST A: NON-MASKABLE INTERRUPT VERIFICATION (NMI) TEST.. 18 20.0 TEST B: HIGH VOLTAGE POWER SUPPLY TEST .......................... 19 21.0 ,TEST C: DATA ENTRY'TEST .......................................................... 20 22.0 TESTD: RELAYTEST .......................... ............................ 20 23.0 TEST F: JUMPER CONFIGURATION TEST:................................... 21

.24.0 OPERATING SOFTWARE TEST ........................................................ 21 25.0 BURN-IN .. ...................... ....................... 22 26.0 DOCUM ENTATION ............................................................................ 23 tpid#49/956A2013.doc 3 F F OP'L'

INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 1.0 PURPOSE The purpose of this procedure is to provide a uniform method to functionally test the Model 956A-201 Ratemeter.

2.0 SCOPE This procedure is to be performed on all 956A-201 series Universal Digital Ratemeters prior to placing in stock. In addition, this procedure is to be used to document post repair testing of any 956A-201 series units returned for repair or calibration.

NOTE: Refer to drawing 956A-201-106 for Ratemeter/Detector interconnections.

3.0 RESPONSIBILITIES 3.1 Personnel performing this test must have a Technicians Skill Level 2 per S.O.P. 902.003.

3.2 Data generated by this procedure must be reviewed and approved by Q.A. prior to shipment to customer. A copy of the test Data Sheet shall be retained by Q.A. and placed in a job file.

4.0 EQUIPMENT REQUIRED 4.1 942TS-100 Test Set with interconnecting cables 942ATS-100-14 and 942TS-1 00-37.

4.2 Televideo Terminal (TV) or RS-232 Compatible Device.

4.3 942-200-80A Communications PCB Assembly with Test Cable.

4.4 Dual Channel Oscilloscope/Tektronix 465 or equivalent.

4.5 High Voltage Probe: Fluke 80K-6 or equivalent -- must be calibrated.

r-,%h tp/d#49/956A2013.doc 4 FILE

INOVISION RADIATION MEASUREMENTS TITLE: -TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: N/A DOCUMENT: TP956A-201-3 REV. 4 4.6 Wavetek 187 Signal Generator or equivalent.

4.7 Frequency Counter: Fluke 1900A or equivalent - must be calibrated.

Note: If the Function/Pulse generator used has a calibrated display, a calibrated frequency counter is not required.

4.8 "TestSoftware 94094200200 (Latest Revision Level).

4.9 Test Leads, BNC terminated coaxial cables, etc.

4.10. Digital Multi-Meter (DMM): Fluke 8050A or equivalent -- must be calibrated.

4.11. 956A-201/897A-2XX Interconnecting cable per drawing 956A-201-106.

4.12 Right Angle Connector for 942-200-80A Board.

4.13 Detector: 897A-210 or 897A-220 shop test unit.

Itp/d#49/956A2013.doc 5 -FILE -COPY

INOVISION RADIATION MEASUREMENTS ,

TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 5.0 SET-UP (See Figure 1) 5.1 Set-up the Main PCB Assembly jumpers (Located in rear, right hand corner except JP-3, located near center of PCB Assembly) as follows:

JP-1, None, Momentary short for RESET JP-2, 2-3, Prom size (27C256)

JP-3, ALL, Sensitivity Select, Auto Acknowledge, No Fail, Alarms on C/S JP-4, 2-3, Positive Input Pulse JP-5, 2-3, Shield Ground JP-6, 2-3, Anti-Jam Fuse Disable for testing JP-7, 2-3, GM Detector Anti-Jam Pulse Select 5.2 Set-up Televideo (referred to as TV) or other RS-232 compatible device, as follows:

Press "F5" key for "SET UP".

Press "F2' key for "COMM".

Press Function keys to set up the following:

4800 4800 NONE 8 1 FDX X-ON 2 HDX M.BAUD P.BAUD PARITY D.BITS S.BITS MODE PROTCL Press "ALPHA LOCK" key. Observe a "*"in the Lower, Left Corner of the highlighted Menu Block (Televideo Only).

5.3 Set-up Signal Generator as follows:

A. Square Wave pulse B. 1 volt peak positive pulse C. DC offset: at ground reference D. 100 kHz 5.4 Connect Line Cord to P3.

5.5 DC Power Supply Verification tp /d#49/956A2013.doc F LE COPY

INOVISION RADIATION MEASUREMENTS.

TITLE: TEST PRObEDURE FOR THE 956Ak01 --,UNIVERSAL DIGITAL RATEMETER CUSTOMER: N/A DOCUMENT: TP956A-201-3 REV. 4 5.5.1 Connect the DVM neg lead to the Ground point (black 18GA wires) located on the power supply assembly terminal block.

Connect the DVM positive lead to the +5 point (blue 18 GA wires) located on the power supply assembly terminal block.

"5.5.2 Apply power to the unit under test.

5.5.3 Verify a +5.00 VDC : 0.100 VDC reading on the DVM. A single adjustment is VIA VR1 provided on the 5V~power supply to trim all three supplyoutputs. Enter the final reading on the test data sheet.

5.5.4 Connect the DVM positive lead to the +15V terminal (red 18 GA wires). Verify a reading of +15V+/-0.75VDC. Enter the reading on test data sheet.

5.5.5 Connect the DVM positive lead to the -15VDC terminal (orange 18 GA wires). Verify a reading of -1 5VDC +/-0.75 VDC. reading on the test Data Sheet.

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INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: N/A DOCUMENT: TP956A-201-3 REV. 4 FIGURE 1 tp/d#49/956A2013.doc 8

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INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 fUNIVERSAL DIGITAL RATEMETER CUSTOMER: N/A DOCUMENT: TP956A-201-3 REV. 4 TABLE I - Serial Interface Baud Rate, PIN 942-200-80A

• Normal setting for test and operational modes.

NOTE: Switches 5, 7 and 8 should be in theOFF position while Switch 6 should be in the ON position:

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INOVISION RADIATION MEASUREMENTS TITLE: '-TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL, RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 6.0 WRITE CLOCK ADJUSTMENT 6.1 Apply Power to the UDR.

6.2 Adjust Oscilloscope for 2 V/DIV., .2 uS/DIV. Set trigger to Channel 1 for a negative going pulse.

6.3 Connect Channel 1 to U19-2 (/CLOCK).

6.4 Connect Channel 2 to U19-12 (/SHORT 02).

6.5 Adjust VR13 to obtain a 225 nS delay between the negative going edge of Channel 1 and the negative going-edge of Channel 2 as shown in Figure 2. Paint VR13.

6.6 Circle result (Pass/Fail) on Data Sheet.

Ch. 1 /CLOCK Ch. 2 /SHORT 02 <- -225 nS FIGURE 2 7.0 DISCRIMINATOR ADJUSTMENT 7.1 Connect DMM (+) lead to the "HI" test jack and the (-) lead to the "GND" test jack.

7.2 Adjust VR10, high discriminator, to both extremes verifying a range of approximately 3.6 V to 7.4 V. Record PASS or FAIL on the Data Sheet.

7.3 Adjust VR10 for 5 +/- 0.01 V and record the final value on the Data Sheet.

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INOVISION RADIATION MEASUREMENTS -.

TITLE: :TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 7.4 Connect DMM (+) lead to the "LO" test jack.

7.5 Adjust VR1 1, low discriminator, to both -extremes verifying a range of approximately 0.07 V to 1.0 V. Record PASS or FAIL on the Data Sheet.

7.6 Adjust VR11 for 0.5 +1- 0.001 V and record the final.value on the Data Sheet.

8.0 INPUT AMPLIFIER ADJUSTMENT 8.1 Using a test lead, short "P5 SIG." Input to chassis GND.

8.2 Connect DMM (+) lead to "PULSE" test point (Located near JP6).

8.3 Adjust VR9 for .0000 V +/- .0001 V. Paint VR9.

8.4 Record value on Data Sheet.

8.5 Remove test lead from "P5 SIG.". Connect Signal Generator to "P5 SIG.".

8.6 Set-up Oscilloscope for .2 V/DIV., 2 uS/DIV.

8.7 Connect Oscilloscope Channel 1 to "P5 SIG.".

8.8 Connect Oscilloscope Channel 2 to "PULSE" test point.

8.9 Adjust VR8 so that both waveforms are at equal amplitudes (Unity Gain). Paint VR8.

8.10 Circle result (Pass/Fail) on Data Sheet.

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INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 9.0 ANTI-JAM ADJUSTMENT 9.1 Connect DMM (+) lead to the right side of R94.

9.2 Adjust VR12 to both extremes verifying a range of approximately 0.0 V to 1.5 V.

9.3 Circle result (Pass/Fail) on Data Sheet.

9.4 Adjust VR12 for 0.875 V +/- .001 V. Paint VR12.

9.5 Record value on Data Sheet.

9.6 Turn UDR Power Off and install Test Software 94094200 into U23.

9.7 Connect 942TS-100 Test Set cables to the "P1 I/O", "P2 DET.", and "P6 AUX" connectors located on rear panel. See Figure 1.

9.8 On the 942-200-80A Communications PCB Assembly, place SW1-3, 4, and 6 in the ON position. See Table 1.

9.9 Connect the 942-200-80A Communications PCB Assembly to J3 of Main PCB Assembly via the Right Angle Connector. Connect the Televideo (Referred to as TV) RS-232 cable to the 942-200-80A's J4.

10.0 TEST 1: RAM TEST 10.1 Apply Power to UDR. TV should prompt. Select "M"for "TEST MENU".

Select "1" for "BASE UNIT TEST" Menu. Menu will be displayed.

RAM TEST verifies read and write functions and data patterns in RAM address 0090 through 1FFF. Data patterns are 00, FF, 55, AA and 00 FF repeated. Error addresses will be displayed on the TV.

10.2 Select subtest "1".

10.3 Verify all RAM locations pass.

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.INOVISION RADIATION MEASUREMENTS TITLE: -TEST PRO(CEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 =

10.4 Circle result (Pass/Fail) on Data Sheet.

..11.0 TEST 3: BAR GRAPH TEST BAR GRAPH TEST activates each segment from left to right starting with Green, then Amber, and then Red.

11.1 Select subtest "3".

11.2 Verify that all Bar Graph Segments activate in proper sequence and color. .

11.3 Circle result (Pass/Fail) on Data Sheet.

12.0 TEST 4: DISPLAY TEST

- DISPLAY TEST cycles each character from right to'left across'the display.

Character sequence is 1, 2, 3, 4, 5, 6, 7,8, 9, -, E, H, L, P,..

12.1 Select subtest "4".

12.2 Verify that all units properly display each character and in the right sequence.

12.3 Circle result (Pass/Fail) on Data Sheet.

13.0 TEST 5: -SWITCH TEST SWITCH TEST reads status changes of the UDR's front panel switches and the 942TS-1 00 Test Set's REMOTE ACK switch.

13.1 Connect jumper wire across the RI 1 position (Located in rear, left hand corner).

13.2 Select subtest "5".

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INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: N/A DOCUMENT: TP956A-201-3 REV. 4 13.3 Press each front panel switch several times and verify that the TV displays the correct switch each time.

13.4 Press the 942TS-100 REMOTE ACK switch several times and verify that the T"V displays the correct switch each time. Remove the jumper wire from across RI 1 position.

13.5 Circle result (Pass/Fail) on Data Sheet.

14.0 TEST 6: INDICATOR/BACKLITE/FAIL TEST INDICATOR/BACKLITE/FAIL TEST cycles through front panel indicators/backlites in sequence as displayed on the TV. The fail light which is normally on will extinguish by this test. It will time out and re-activate in approximately 2 seconds. The Warn indicator is Amber.

14.1 Select subtest "6".

14.2 Verify each indicator/backlite activates as the TV display status indicates. Verify FAIL LED operation.

14.3 Circle result (Pass/Fail) on Data Sheet.

15.0 TEST 7: COUNTER/DISCRIMINATOR TEST COUNTER TEST displays on the TV the input frequency in Hz, until any key is depressed. DISCRIMINATOR TEST involves adjusting the input signal amplitude below, within, and above the discriminator settings (262,126 Hz indicates overflow of counters). Connect Oscilloscope Channel A to P5 signal.

15.1 Adjust Signal Generator for a +400 mV pulse at 1 KHz.

15.2 Select subtest "7".

15.3 Verify TV reads 000000 HZ. Enter result on Data Sheet.

15.4 Adjust Signal Generator amplitude for a +1 V.

t p/d#49/956A2013.doc 14 FiLE COPY

INOVISION RADIATION MEASUREMENTS.,

TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 15.5 Verify TV reads 001000 Hz +/- 000010 Hz. Enter result on Data Sheet.

15.6 Adjust Signal Generator frequency for 100 Hz.

15.7 Verify TV reads 000100 Hz,+/- 00001 Hz. Enter result on Data Sheet.

15.8 Adjust Signal Generator frequency for 10 kHz.

15.9 Verify TV reads 010000 Hz +/- 000100 Hz. Enter result on Data Sheet.

15.10 Adjust Signal Generator frequency for 100 kHz.

15.11 Verify TV reads 100000+/- 001000 Hz. Enter results on Data Sheet.

15.12 Adjust Signal Generator frequency for 280 kHz.

15.13 Verify TV reads 262126 Hz (Overflow). Enter result on Data Sheet.

15.14 Adjust Signal Generator amplitude for a +5.5 V.

15.15 Verify TV reads 000000 Hz +/- 000010 Hz. Enter result on Data Sheet.

15.16 Disconnect Signal Generator from "P5 SIG.".

15.17 Adjust VR10 for a 7 +/- 0.01V DVM indication. Neg probe on "GND" test jack, and positive probe on "HI" test jack. Record the final value on the Data Sheet.

15.18 Verify VRII adjustment for 0.5 +/- 0.001 V. ,DVM Neg probe on "GND" test jack and positive probe on "LO" test jack. Record the final value on the Data Sheet.

11 f 1-i.A-. 9r_&n,* ý .4 .

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ID FILE COPY

INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: N/A DOCUMENT: TP956A-201-3 REV. 4 16.0 ANTI JAM BIT TEST This test exercises the anti jam circuitry by injecting a frequency greater than the anti jam voltage. The anti jam bit is D1 of location 4008H.

16.1 Cycle power on the UDR.

16.2 Adjust signal generator to 40 KHz with a +5V peak.

16.3 Type in 4008/.

16.4 The response will be 05 after the "/". Record on Data Sheet.

16.5 Increase signal generator to 55 KHz.

16.6 Type in 4008/.

16.7 The response will be 07 after the" /". Record on Data Sheet.

16.8 Decrease frequency generator to 40 KHz.

16.9 Cycle power on the UDR.

16.10 Type in 4008/.

16.11 The response will be 05 after the "/". Record on Data Sheet 16.12 Type "M" and select the base unit test.

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INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: N/A DOCUMENT: TP956A-201-3 .REV. 4 17.0 TEST 8: DIA CONVERTER 4-20 mAl0-10 V OUTPUT TEST' The D/A CONVERTER TEST sets the high scale and :low scale output for calibration of two 4-20 mA outputs and one 0 -10 V outpu.-"The 942TS-1OOT Set has had 250 Ohm Load Resistors gadded to the 4-20 mA output connections.

The measurements will be made in volts even though the TV instructions call for current. Verification of low, mid, and high scale are performed. Follow calibration instructions displayed on TV.

Refer to following table for correct conversions and tolerances.

4-20 mA OUTPUTS SCALE CURRENT VOLTAGE Low 4 mA 1.000 V +/- .001 V Mid 12 mA  :'3:000 V +/- .015 V High 20 mA 5.000 \i-J.0i V 0-10 V OUTPUT SCALE VOLTAGE Low .0000 V +/- .0001 V Mid 5.000,V +/- .030 V High 10.000 V +/- .001 V 17.1 Select subtest "8". -'

17.2 Follow TV calibration instructions.

17.3 Record Calibration Verification values on Data Sheet.

17.4 Paint VR1, VR2, VR4, VR5, VR6, and VR7. -

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INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 18.0 TEST 9: EEPROM TEST EEPROM TEST writes data, patterns to the, EEPROM device then prompts the user to cycle power. The program is re-entered by the user and a verification of data patterns is performed by the test program.

CAUTION THIS TEST WILL DESTROY PREVIOUS SETPOINTS.

18.1 Select subtest "9".

18.2 Select "W'.

18.3 Turn UDR Off, wait one minute, then turn on.

18.4 TV should prompt. Select "M"for "TEST MENU". Select "1" for "BASE UNIT TEST' Menu. Menu will be displayed.

18.5 Select subtest "9".

18.6 Select '/".

18.7 Result will be displayed on TV. Circle result (Pass/Fail) on Data Sheet.

19.0 TEST A: NON-MASKABLE INTERRUPT VERIFICATION (NMI) TEST The NMI VERIFICATION TEST measures the time interval between interrupts and displays this time period in mS on the TV. NMI occurs at 8 Hz rate, therefore, the terminal should display 125 mS.

19.1 Select subtest "A".

19.2 Verify TV reads 125 mS +/- 1 mS.

19.3 Record result on Data Sheet.

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INOVISION RADIATION MEASUREMENTS" TITLE: TEST PROCEDURE FOR THE 956A'-2061UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 20.0 TEST B: HIGH VOLTAGE POWER SUPPLY TEST,

, The HIGH VOLTAGE POWER SUPPLY TEST verifies the"voltage range as well as testing the HV Shutdown function.

20.1 Connect HV Probe (-) lead to "GND"-test jack. Connect HV Probe (+)

lead to "P4 HV" MHV Connector.

20.2 Select subtest "B".

20.3 Adjust R5 (HV PCB Assy.) for a reading of 600 V +/- 1 V.

'-20.4- Record value on Data Sheet.

20.5 Connect DMM (+) lead to the "HV TEST" test jack (Test jack provides a 1000:1 DC voltage measurement). Ve'ify a DMM reading of 0.600 V +/-

.060 V.

20.6 Record value on Data Sheet.

20.7 Adjust R5 to both extremes verifying a voltage range of 400 V to 1800 V.

20.8 - Record adjustment minimum and maximum values on the Data Sheet.

20.9 Re-adjust HV for 550 V +/- 1 Volt.

20.10 Enter "S" on TV. Verify that HV has been shut down-.

20.11 Circle result (Pass/Fail) on Data Sheet.'

tp/d#49/956A2013.doc 19 F1 LE -COPY

INOVISION RADIATION MEASUREMENTS TITLE: -TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 21.0 TEST C: DATA ENTRY TEST The DATA ENTRY TEST verifies operation of the Data Entry switches ("DIGIT",

'VALUE", "ENTER") and the "FUNCTION" switch.

21.1 Select subtest "C".

21.2 Press each Data Entry switch several times and verify that TV displays correct entries.

21.3 Circle result (Pass/Fail) on Data Sheet.

21.4 Select "F" for Function switch test. Verify correct "FUNCTION" switch position. Repeat test for each "FUNCTION" switch position 0 through F.

21.5 Circle result (Pass/Fail) on Data Sheet.

22.0 TEST D: RELAY TEST The RELAY TEST sets each relay from de-energized to energized state in sequence as displayed on the TV. The 942TS Test Set provides the relay status information. Note that the 956A-201 checksource will not cause a lamp state change to occur during this test. Checksource function is tested with a shop detector in Section 24.10.

22.1 Select subtest "D".

22.2 Hold down the "D"key for several executions of the test.

22.3 Verify each relay and its contacts response according to TV information displayed.

22.4 Circle result (Pass/Fail) on Data Sheet.

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INOVISION RADIATION MEASUREMENTS TITLE: TEST PR6CEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: N/A DOCUMENT: TP956A-201-3 .REV. 4 23.0 TEST F: JUMPER CONFIGURATION TEST The JUMPER CONFIGURATION TEST verifies whether or not JP3 Jumpers 1-5 are installed and displays the appropiriate position on the'TV.

23.1 Select subtest "F".

23.2 Verify that all JP3 jumpers are installed.

23.3 Remove all JP3 jumpers. Repeat test and verify that all jumpers are

-removed.

23.4 Install one jumper at a time and verify the position of that jumper is correct by repeating the test.

.23.5- Circle result (Pass/Fail) on the Data Sheet.

24.0 , OPERATING SOFTWARE TEST 24.1 Remove Power from the UDR. Remove DMM leads. Remove 942TS Test Set connections. Remove 942-200-80A -Communications PCB Assembly and angle bracketf "24.2 Replace Test Software with Operating -Software.--Standard operating software is 94095603.

24.3 Hold down the "ENTER" Key and then apply power to UDR (Automatically sets "HIGH" and-"WARN" Alarm Levels). Turn Power Off then re-apply Power.

24.4 0.00 mR/h should be displayed and the "RANGE" LED should be On.

24.5 Depress the "HIGH" button. Verify 1.00E3 mR/h.

24.6, Depress the 'WARN" button. -Verify 1.00E1lmR/h'.

24.7 Depress the "CHECK SOURCE" button. Verify CHECKSOURCE LED turns On.

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INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER: N/A DOCUMENT: TP956A-201-3 REV. 4 24.8 Circle result (Pass/Fail) on Data Sheet.

24.9 Sign off Travelers and Data Sheet.

24.10 Send unit to Production for Final Assembly.

25.0 BURN-IN 25.1 The 956A-201 UDR Final Assembly will be installed in a 948-1 Rack Chassis and burned in for 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />.

25.2 Visual Assembly for cosmetic defects and loose hardware. Verify that correct Travelers and Data Sheets are properly completed. Record operational firmware number and revision level on Data Sheet and Travelers.

25.3 Place JMP-6 in the 1-2 position (Enable anti-jam circuit). Install the UDR into a 948-1 Rack Chassis.

25.4 Apply Power. 0.00 mR/h should be displayed and the "RANGE" LED should be On (If EEEEE is displayed, Anti-Jam Fuse F1 is defective.

Replace if necessary.) After approximately five (5) minutes, the "FAIL" LED should turn On.

25.5 Depress the "HIGH" button. Verify 1.00E3 mR/h.

25.6 Depress the 'WARN" button. Verify 1.00E1 mR/h.

25.7 Depress the "CHECK SOURCE" button. Verify LED turns On.

25.8 Log the start time of the burn-in on the Data Sheet.

NOTE Quality Assurance is to be notified of any failures noted during burn-in.

The entire procedure, Section 25, must be repeated in the event of a failure.

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INOVISION RADIATION MEASUREMENTS STITLE: -TEST PRObCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL' RATEMETER CUSTOMER: NIA DOCUMENT: TP956A-201-3 REV. 4 25.9 After 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />, log burn-in stop date and time, and repeat Steps 24.5 through 24.7. Remove power. Using an interconnection cable wired per drawing 956A-201-106, connect the 956A-201 -under 'test'to a -shop 897A-210 or 897A-220 detector.

25.10' Apply Power. Verify that the UDR responds to the Detector byactivating the 956A checksource push buitton and noting the increase in displayed value.

25.11 Remove Power. Remove the' Interconnect Cable and the Line Cord.

UDR is now ready to be cleaned up and packaged.

25.12 Circle results (Pass/Fail) on Data Sheet.

26.0 DOCUMENTATION 26.1 After final review, Quality Assurance -shall file the-. completed original document in the Quality Assurance Sales or Job File.

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INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER P.O._ _ _

CUSTOMER: VICO S.O./W.O.

DOCUMENT: TP956A-201-3 REV. 4, 956A-201 TEST DATA SHEET 1, Page 1 of 4 PART NUMBER SERIAL NUMBER DMM Model SIN Cal. Due Date I I Scope SIN Cal. Due Date I H.V. Probe SIN Cal. Due Date / I Frequency Counter SIN Cal. Due Date / /

Test Software 940942200200 Rev. Level Operating Software Rev. Level 5.5 SET-UP

+5VDC +/- 0.100VDC V

+15VDC +/- .75VDC V

-15VDC +/- .75VDC V 6.0 WRITE CLOCK ADJUSTMENT 6.6 VR13 Adjustment Pass/Fail 7.0 DISCRIMINATOR ADJUSTMENT 7.2 VR10 Adjustment Pass/Fail 7.3 VR1O Final Setting (5 +/- 0.01 V) 7.5 VR1 1 Adjustment Pass/Fail 7.6 VR11 Final Setting (0.5 +/- 0.01 V) 8.0 INPUT AMPLIFIER ADJUSTMENT 8.4 VR9 Adjustment .0000 V +/- .0001 V V 8.10 VR8 Adjustment Unity Gain Pass/Fail 9.0 ANTI-JAM ADJUSTMENT 9.3 VR12 Adjustment Range Pass/Fail 9.5 VR12 Adjustment 0.875 V +/- .0001 V V

10.0 TEST 1: RAM TEST 10.4 RAM Locations Pass/Fail tp/d#49/956A2013.doC 24 FILE COPY

INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FORTHE 956A-201 UNIVERSAL- DIGITAL RATEMETER CUSTOMER P.O._"_ "

CUSTOMER: VICO S.O./W.O.

DOCUMENT:- TP956A-201-3 REV. 4 ,

S', 956A-201 TEST DATA SHEET -Page 2 of 4 11.0 TEST 3: BAR GRAPH TEST 11.3 Bar Graph Segment Sequence and Color Pass/Fail 12.0 TEST 4: DISPLAY TEST 12.3 Display Characters and Sequence Pass/Fail 13.0 TEST.5: SWITCH TEST 13.5 Front Panel Switches and REMOTE ACK. Pass/Fail 14.0 TEST 6: INDICATOR/BACKLITE/FAIL TEST

.14.3 Indicator/Backlite/Fail LED Operation Pass/Fail 15.0 TEST 7: COUNT-ER/DISCRIMINATOR TEST 15.3 Verify 000000 Hz 15.5 Verify 001000 Hz +1- 000010 Hz -- ' Hz 15.7 Verify 000100 Hz +/-000001 Hz Hz 15.9 ,Hz Verify 010000 Hz +1- 000100 Hz 15.11 Verify 100000 +/- 001000 Hz Hz 15.13 Verify Overflow 262126 Hz Hz Hz 15.15 Verify 000000 Hz +1- 000010 Hz Hz 15.17 VR10 Adjustment, 7V+/- 0.01 V V

15.18 VR11 Adjustment, 0.5 V +/- 0.001 V V

16.0 _ ANTI JAM BIT TEST 16.4 Verify 05 displayed 16.7 Verify 07 displayed 16.11 Verify 05 displayed tp/d#49/956A2013.doc 25 FiLEýCo, V

INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR-THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER P.O. _ _ _ _

CUSTOMER: __ VICO S.O./W.O.

DOCUMENT: TP956A-201-3 REV. 4 956A-201 TEST DATA SHEET Page 3 of 4 17.0 TEST 8: D/A CONVERTER 4-20 mA/0-10 V OUTPUT TEST 17.3 Calibration Verification, Analog Outputs:

4-20 mA OUTPUTS #1 and #2 SCALE CURRENT VOLTAGE SPEC. Output#1 Output #2 Low 4 mA 1 +/-.001 V V V Mid 12 mA 3 +/-.010 V V V High 20 mA 5 +1-.001 V V V 0-10 V OUTPUT SCALE VOLTAGE SPEC. VALUE Low .0000 V +/- .0001 V V Mid 5.000 V +/- .030 V V High 10.000 V +/-.001 V V 18.0 TEST 9: EEPROM TEST 18.7 Write and Verify Pass/Fail 19.0 TEST A: NON-MASKABLE INTERRUPT VERIFICATION (NMI) TEST 19.3 Verify 125 mS +/- 1 mS Pass/Fail 20.0 TEST B: HIGH VOLTAGE POWER SUPPLY TEST 20.4 R5 Adjustment/"P4 HV" V 20.6 "HV TEST" Jack (0.600 +/- 0.010 V) V 20.8 R5 Adjustment (400 V to 1800 V)

-min max 20.11 HV Shut Down Pass/Fail tpld#491956A2(13.doc 26 FILE COPY

INOVISION RADIATION MEASUREMENTS TITLE: TEST PROCEDURE FOR THE 956A-201 UNIVERSAL DIGITAL RATEMETER CUSTOMER P.O.

CUSTOMER: VICO S.O./W.O.

DOCUMENT: TP956A-201-3 REV. 4 956A-201 TEST DATA SHEET Page 4 of 4 21.0 TEST C: DATA ENTRYTEST 21.3 DIGIT, VALUE, and ENTER Switches Pass/Fail 21.5 FUNCTION Switch Pass/Fail 22.0 TEST D: RELAY TEST 22.4 Relay Response Pass/Fail 23.0 TEST F: JUMPER CONFIGURATION TEST 23.5 JP3 Jumpers Pass/Fail 24.0 OPERATION SOFTWARE TEST 24.8 Display Reading, "RANGE" LED HV Reading, "High", 'Wnam", "Rate" Values, Check Source LED Pass/Fail 25.0 BURN-IN 25.8 Burn-in Start Date/Time 25.9 Burn-in Stop Date/Time) 25.10 Check Source Function Pass/Fail 25.12 No failures observed during burn-in Pass/Fail and Post burn-in tests Performed By Date / I Q.A. Review By Date _ I tp/d#49/956A2013.doc 27 FILE COPY

r VBankzcPaj C-VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES'DETECTORS PAGE CUSTOMER: N/A 1 OF 16 DOCUMENT: TP956A1897A-22X REV. B ISSUE DATE: - -,JANUARY 9, 1996, REVISION LIST-.

REV ECO #

"B 4CR37-96.

__- APPROVAL 'DATE PROJECT ENGINEERAR TECHNICAL- SUPPORT MANAGER(

-QUALITY ASSURANCE~

ISSUED BY: -DAVID WARNER tp/d#49/956a22x.doc

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B RECORD OF REVISIONS DOCUMENT REV. LEVEL DESCRIPTION/PAGES AFFECTED A Supersedes LT956/897 Revised Paragraphs 6.2, 7.1.5, 7.1.8, B 7.1.12, 7.2.1, 7.2.5, Identified Tables, and revised Page 2 of Data Sheet Truth Table tp/d#49/956A22x.doc 2

VICTOREEN, INC.

TITLE:, - -- TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B TABLE OF CONTENTS Section Description 1.0 PURPOSE ........................................ ......... 4 2.0 SCOPE ................................................................................ 4 3.0 RESPONSIBILITIES .......................................... 5

_-4.0 ': ENVIRONMENTAL CONDITIONS ......... ............. .................... 5

- 5.0 EQUIPMENT REQUIRED ......... ,.. ................... 5

,6.0 PREREQUISITES ............................................ 6 7.0 PRO CEDURE ............................. ................................................ 7 tp/d#49/956A22x.doc 3

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV.' B 1.0 PURPOSE The purpose of this procedure is to verify the proper operation of a complete MEDIUM RANGE 955A Area Monitor channel.

2.0 SCOPE 2.1 This procedure is to be performed on all MEDIUM RANGE 955A channels prior to shipment. This procedure gives detailed instructions on integrated testing of the model 956A-201 rate meter (UDR) and model 897A-220 or 897A-221 detectors. In addition, this procedure covers integrated testing of 958 or 958A series remote alarm/indicators if supplied. Any combination of the following equipment may be tested using this procedure.

Rate Meter Remote Alarm(ODtional) 956A-201 897A-220, 897A-221 958-20, 958A-20 958-40, 958A-40 Note: Space on the Data Sheet is provided to identify and test some possible options such non-standard analog outputs.

2.2 The following functions and operational parameters are tested by this procedure:

2.2.1 956A-201 Display value within tolerance.

2.2.2 956A-201 Analog Outputs within tolerance including optional outputs (if provided).

2.2.3 Check Source response greater than minimum requirements.

2.2.4 Alarm, Warn, Range, Overrange and Fail Actuation.

tp/d#49/956A22x.doc 4

VICTOREEN, INC.

TITLE: - TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X -REV. B 2.2.5 958/958A Remote Alarm display and annunciation (if

-applicable).

2.2.6 958A Remote Alarm silence feature (if applicable).:

2.2.7 958 Remote Alarm relay auxiliary contacts (if applicable).

3.01, RESPONSIBILITIES 3.1 Personnel performing this test must have a Technicians Skill Level 1 S- per S.O.P. 902.003.

3.2 Data generated by this test must be reviewed and approved'by Q.A.

prior -to shipment. In addition, Q.A,, has the responsibility of maintaining channel or systems test data in a job file.

3.3, Individuals performing this procedure must insure that it is conducted in such manner as to minimize radiation exposure to both themselves and others. Personal radiation dosimetry is required for any individuals participating in this procedure when 'a Field Calibrator is in use.

4.0 ENVIRONMENTAL CONDITIONS 4.1 Environmental conditions shall be the prevailing laboratory ambient for temperature and humidity. -'

"5.0 EQUIPMENT REQUIRED "5.1 Customer 848-8 to be supplied with channel -- must be calibrated. If no Customer Calibrator is provided or available, VICTOREEN Model 848-8 Field Calibrator Serial Number 119 is to be used.

5.2 848-8-105 Field CalibratorAdapter, customer'provided or Victoreen equipment.

5.2.1 848-8-400 Adapter for 897A-221 detectors with stainless steel housing only.

tp/d#49/956A22x.doc 5

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B 5.3 Digital Voltmeter: Fluke 8050A or equivalent - must be calibrated.

5.4 Personal dosimetry.

5.5 Radiation control barriers (yellow/magenta rope) and Radiation Area warning signs (if access control of area cannot be assured).

5.6 Interconnection cables between detector, rate meter and remote alarm (if applicable) refer to one of the following loop diagrams:

5.6.1 956A-201-106

956A-201 ratemeter to 897A-220 or 897A 221 detectors.

5.6.2 958-1-24

As above but including 958-20 or 958-40 Remote Alarm.

5.6.3 958A-1-24

As above but including 958A-20 or 958A-40 Remote Alarm.

5.6.4 Job Specific Loop Diagram (contact project engineer).

5.7 250 ohm, 1 % resistors (2) for 4-20 mA termination.

6.0 PREREQUISITES 6.1 Prior to interconnecting equipment, verify by model number that all of the equipment listed on the sales or work order is present and that all required option boards (if applicable) are installed in the 956A-201 ratemeter.

6.2 Completed and signed copies of CAL-GM6 (897A series detectors) and TP956-201-3 (956A-201 ratemeter) are required prior to beginning this procedure. Completed and signed copies of any option board tests are also required when option boards are installed.

tp/d#49/956A22x.doc 6

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS .

CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B 7.0 PROCEDURE 7.1 Preliminary Data and Set-up.

7.1.1 Record thecustorne-,'-P.O. -and S.O. numbers on the Data Sheet.

7.1.2 Record the model and serial numbers of all equipment to be

,- - tested.

, 7.1.3 Record the model serial number and calibrationdue date of the

- digital voltmeter.

7.1.4 Record the 956A-201 firmware number 'and,'revision/date on the Data Sheet.

7.1.5 Decay correct to the current date the 897A'dose rate listed on

- the 848-8,S/N 119 or Customer 848-8 Calibration, Data Sheet

. . .for the CLOSED and MID positions. No dose rate 'calcula'tions

<' " *- are required-"for'the rpositionOPEN as-t will be used to overrange the unit under-test. Enter the'decay corrected dose rates under the "Desired" column of the Display/Analog Output Tablden the Data Sheet. "

Decay Formula: Current Dose Rate. = R

. - -(t e J(0.693 23-0.-ti) 30.0 Where R = is the baseline dose rate The elapsed time in years fromthe date dose rate was determined to the current date-'"

30.0 " = the half-life of 1-37-Cs in years Table 1, 137-Cs Half-Life' Tablie-,' ma yalso be used to determine the current dose rate for thisstep.

tp/d#49/956A22x.doc 7

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B TABLE 1 HALF-LIFE DECAY TABLE FOR Cs-137 OVER 10 YEARS (HALF-LIFE 30.00 YEARS)

I -

CL A. r .1 M W T I M E -- MO0N TH S YEAR 0 1 2 3 4 5 6 7 8 9 10 11 0 1.000 0.998 0.996 0.994 0.992 0.990 0.989 0.987 0.985 0.983 0.981 0.979 1 0.977 0.975 0.973 0.972 0.970 0.968 0.966 0.964 0.962 0.960 0.959 0.957 2 0.955 0.953 0.951 0.949 0.948 0.946 0.944 0.942 0.940 0.938 0.937 0.935 3 0.933 0.931 0.929 0.928 0.926 0.924 0.922 0.921 0.919 0.917 0.915 0.913 4 0.912 0.910 0.908- 0.906 0.905 0.903 0.901 0.900 0.898 0.896 0.894 0.893 5 0.891 0.889 0.887 0.886 0.884 0.882 0.881 0.879 0.877 0.876 0.874 0.872 6 0.871 0.869 0.867 0.866 0.864 0.862 0.861 0.859 0.857 0.856 0.854 0.852 7 0.851 0.849 0.847 0.846 0.844 0.843 0.841 0.839 0.838 0.836 0.834 0.833 8 0.831 0.830 0.828 0.826 0.825 0.823 0.822 0.820 0.819 0.817 0.815 0.814 9 .8 I2 U0.11 0.8 0.808 0.806 0.805 I 08O I ORri I n rn I e, t% -*Q'7 f% -/Qr-0.806 0 8030

.805 Rlr('% ()_700 '7 Q7 rk 7.1.6 Convert the dose rates determined in step 7.1.5 into equivalent analog output voltage and current values for each of the CLOSED and MID calibrator positions using the formulas and examples given below.

First, using the formula below, convert the dose rate to a percentage of full-scale.

P = log(R/LSV)/[log(FSV)-log(LSV)]

where P = percentage of full-scale in decimal number R = Current dose rate determined in step 7.1.4 LSV = Low Scale Value (Analog Low scale Setpoint)

FSV = Full Scale Value (Analog Full-scale Setpoint) tp/d#49/956A22x.doc 8

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B 7.1.7. Next,- using the 'formula below, convert to analog output

. voltage and current values as required by the configuration of the 956A-201 under test. For'a standard 956A-.201 this will

-. be 1-5 volts (4-20 mA across'250 ohm) for current loop outputs and 0-10,volts-for voltage output.

, V , =-P(FSV-LSV) + LSV '

where P = Percent of full-scale as a decimal number FSV = Full-scale voltage LSV - =-Low scale voltage Other optional analog output voltages are also calculated using the above formula., Record the voltage-values for each position of the 848-8 field calibrator on the Data Sheet under the "Desired" column of the Display/Analog Output Table. Values listed under the OPEN position on the Data Sheet will be the

"- full-scale value of the specific -analog output. Values listed underthe FAIL position on the Data Sheet will be the low scale value of the- specific analg output._

- -7.-1:8 ---Remove jumper-J7 from-the 956A-201 main circuit board and

. . retain for- re-installation;, gJum-pier-J7 is removed to prevent

.. ... -.- -anti-jam actuation during testing.- .

. .. . - 7.1.9-... Interconnect all ch'annel components- per standard loop or job specific -drawing and-rebcord-the drawing and revision on the

-Data Sheet. - - - - .

tp/d#49/956A22x.doc 9

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B 7.1.10 Terminate both 4-20 MA analog outputs with the 250 ohm 1% resistors. Analog output #1 is located at P6-1 (+/-) and P6-2 (-) while analog output #2 is located at P6-3 (+) and P6-4 (-). If no remote alarm is supplied the 0-10 volt output is measured at P6-5 (+) and P6-6 (-). Refer to job specific drawings for optional analog outputs that may be supplied.

NOTE: If a remote alarm is included, fill in the 0-10 volt/remote meter desired row on the Data Sheet with mR/h values. If no remote is included, fill in the row with calculated voltage values for each position. Position the Remote Alarm in the vertical position and adjust the mechanical zero (if applicable) prior to power-up.

7.1.11 Apply AC power to the 956A-201 and allow a minimum 15 minute warm-up period to elapse prior to proceeding with testing. Reset any alarms that may have tripped on power-up.

7.1.12 Enter setpoints into the 956A-201 in accordance with Table 2.

TABLE 2 956A-201 Function Data Entry Parameter Switch Position Value High Alarm 0 1.00E2 Warn Alarm 1 1.OOE1 Dead Time (Tau) 2

• Analog Full Scale 3 1.00E4 Over Range 4 1.00E3 Conversion Constant 5

• Analog Low Scale 7 1.00-1 Under Range 9 1.00-1 See the detector CAL-GM6 Data Sheet for these values.

tp/d#49/956A22x.doc 10

VICTOREEN, INC.

TITLE: ' TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B 7.1.13 If the channel under test contains optional analog outputs, list these optional outputs on the Data Sheet. If no optional outputs are p~ovided, enter N/A on the Data Sheet.

7.2 -Channel Functional Test 7.2.1 Place the detector in a low background area away from the field calibrator and complete column 1 of the Data Sheet truthi table. If a 958'20 or 958-40 remote alarm is part of the channel under test, verify the following remote alarm internal relay contact logic:

TB1-5 to TB1-7: > 20 meg-ohms TB1-6toTB1-7: < 1 ohm 7.2.2 Depress the CHECK SOURCE push button on the 956A-201 and record the 956A-201 display "Value-'on the Data Sheet when the indication has stabilized.' A minimum response of 10 mR/h is required.

7.2.3, Using the 848-8-105 adapter (and 848-8-400 if a 897A-221 is -being tested),'place the detector into the 848-8 field calibrator and --expose the detector to the CLOSED position.

Complete column 2 of the Data Sheet Truth Table and the Display/Analog Output Table. "

-Note:- The 897A-21 1 -detector is 'positioned in the 848-8-400 adapter so that the connector key will be at the 12:00 o'clock position relative to the 6:00 o'clock position of the source aperture.

--.7.2.4- With the 848-8 ,still -in'the closed'position, depress the 956A 201 ACKNOWLEDGE push-button'and complete column 3 of the Data Sheet Truth -Table. ' "

tp/d#49/956A22x.doc 11

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B 7.2.5 Expose the detector to the MID position of the 848-8 field calibrator and hold. Complete column 4 of the Truth Table and the Display/Analog Output Table on the Data Sheet. If a 958-20 or 958-40 remote alarm is included, .verify the following remote alarm relay contact logic:

TB1-5toTB1-7: < 1 ohm TB1-6 to TB1-7: > 20 meg ohms 7.2.6 If a 958A-20 or 958A-40 remote alarm is installed, depress the SILENCE push-button on the remote alarm enclosure and complete column 5 of the Data Sheet Truth Table. If 958-20, 958-40 or no remote alarm is installed, fill in column 5 with N/A in each box.

7.2.7 With the 848-8 still in the MID' position, depress the 956A 201 ACKNOWLEDGE push-button and complete column 6 of the Data Sheet Truth Table.

7.2.8 Expose the detector to the OPEN position of the 848-8 field calibrator and complete column 7 of the Truth Table and the Display/Analog Output Table on the Data Sheet.

7.2.9 Expose the detector to the MID position of the 848-8 field calibrator and depress the ACKNOWLEDGE push-button on the 956A-201. Complete column 8 of the Truth Table on the Data Sheet.

7.2.10 Remove the detector from the field calibrator and depress the 956A-201 ACKNOWLEDGE push-button. Disconnect the P5 signal connector and note the time. In approximately five (5) minutes, complete column 9 of the Truth Table and the Display/Analog Output Table on the Data Sheet.

tp/d#49/956A22x.doc 12

VICTOREEN, INC.

TITLE:- TEST PROCEDURE FOR 956A-201 -AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B 7.2.11 Divide each of the "Desired" values in the Display/Analog Output Table by the "Actual" values recorded during testing.

The "Actual" values must be within +/-25% of the calculated "Desired" values for dose .rate .and voltage. If-all values are within tolerance, complete verification. If any values are not within tolerance, reject the channel component that is out of tolerance and forvward to the Production Test Department for repair or calibration.

7.2.12 Enter a value of 1.00E4 in position 4 (OVER RANGE).

7.2.13 Turn off 956A-201 power and remove all interconnection cables. Re-install jumper J7 in the 2-3 position on the 956A 201 main circuit board assembly.

-7.2.14 If all values are within tolerance and the truth table logic is

-.. correct, complete and sign the Data Sheet and forward-to' QA for review. Verify that all required accessories such as connector kits, mounting -brackets and ,rack chassis are

-present. Complete and sign travelers and forward to QA with the loop test Data Sheets.

7.2.15 If any portion of this -test has not' been" successfully completed, return the failed component to production test for rework/re calibration* as required along with the Data Sheet identifying the failure.

tp/d#49/956A22x.doc 13

I VICTOREEN, INC.

TITLE: "TEST.PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV! B LOOP TEST DATA SHEET Page 1 of 3 Medium Range GM Area Monitor Customer: P.O. No.:

Channel ID No _ _-_ _S.O. No.:

(If Applicable)

Readout Model: Serial No.:

Detector Model: Serial No.:

Remote Alarm Model: Serial No.:

Test Equipment:

Field Calibrator 848-8 SIN 119 or Customer 848-8 S/N D. V. M. Model #: S/N: Cal Due Date:

7.1.4 956A-201 Firmware Part Number:

Rev.

7.1.12 Detector Conversion Constant:

Detector Dead Time (Tau):

7.1.13 Analog Output Option 1: Range: to Analog Output Option 2: Range: to tp/d#49/956A22x.doc 14

VICTOREEN, INC.

TITLE: - TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES "DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B LOOP TEST DATA SHEET Page 2 of 3 DATA SHEET TRUTH TABLE Enter N/A in any columns or rows that are net nnnlin~hil=

Note:

7.2.1 7.2.3 17.2.4 -7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.2.10 Step Col 1 Col 2 Col 3 Col 4 Col 5 Col 6 Col 7 Cot 8 Col 9

.- Alert J Alert' High 958A High Over OverRng Function Bkgnd Trip Ack Trip Silence Ack Range Reset Fail Hig h ,_ . _. _ _. _ . .

Lamp -(Off) (Off) (Off) (Flashs) (Flash) (Oni I70_-_ I(off)

Warn

• ___

Lamp - (Off) (Flash) (On) (-On) (On) (On) (On) j (Flash) (Off)

,Fail Lamp (Off) j (Off) (Off)

I . .. -

(Off) (Oft) (Off) (Off) I (Off) (On)

Range Lamp (Off) (Off) (Off)

(,Off)-

(off) (Off)

(On) (Off)

_ _ f_ _ - (On)'

Remote Alrm Lamp -(Off)

- (Off) (Off) (On) (On) (On) (On) (On) - __-_(Off)

R em ote _ . . .. ...- . .

Airm Horn (Off) (Off) (Off) (On) (Off) I (On) * (On) (On) (Off)

Bargraph Color . (Green) . -Amber) (Amber) (Red) (Red) (Red) e), - (Red). (Off)

High Relay P1-19 to P1-20 (Closed)

-T -en_ -o -e__-a _______ (

(Closed) (Closed) (Open) _Oen_ _een_ O-O(Closed)

H ig h R e la y - _ ( O en _ _____ __ I _ _ _ _

P1-19 to P1-21 (Open) (Open) IOpen_ ___osed_ (Closed) (Closed) (Closed) (Closed) (Open)

Warn Relay P1-13 to P1-14 I (Closed)

_ I, (Open)O (Open) __ ve en)

(Ope-eOen)

(Open) 2

-T(Open)

(Closed)

Warn Relay __ __ I o_se d) I I

' I ___ _ -_ _ __

P1-13 to P1-15 Fail Relay_

P1-7 to P1-8 (Open)

(Closed)

_ I (Closed (Closed)

(Closed)

(Closed)

_ I (Closed)

(Closed)

(closed-)

(Closed)

(Cos (Closed)

(Closed (Closed)

(Closed)

(Closed)

(Open)

(Open)

Fail Relay Pi-7 to PR-9 (Open) (peen) OOpen) TO (en) (O Pen) n (Open) (Open) (Closed)

• Except with 958A-20 or 958A-40 Remote Alarm 7.2.1 958 Remote Alarm Relay: TB1-5 to TB1-7 (> 20 Meg Ohms)

TB1-6 to TB1-7 (< 'I Ohm)'

7.2.2 Check Source Response:

(> 10 mR/h) 7.2.5 - - 958 Remote Alarm Relay:

(< 1 Ohm)

TB1-6 to TB1-7 (> 20 Meg Ohms) tp/d#49/956A22x.doc 15

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-22X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-22X REV. B LOOP TEST DATA SHEET Page 3 of 3 DISPLAY/ANALOG OUTPUT TABLE

-I 848-8 SIN 848-8 SIN 848-8 SIN Signal Position Position Position Fail CLOSED nr'* -lhI Function Desired Actual ctual Desired Actual I Desired ConditioActual

• • 956A-201 in mR/h EEEEE 0.00 Anig Output 1 1 - 5 Volts 5.00 V 1.00 V AnIg Output 2 1 - 5 Volts 5.00 V 1.00 V 0 - 10 Volt 10.00 V 0.00 V or or or Remote Meter 1.00E4 mR/h 0.1 mR/h

• Analog Option

• Analog Option

• Enter N/A if no Analog Optional outputs are provided.

• • The "desired" value in this row is the decay corrected 848-8 dose rate.

7.2.11 All "Actual" value within +/-25% of calculated "desired" values (Yes) 7.2.12 Value of 1.00E4 entered in Position 4 (Yes)

Performed By: Date:

Q.A. Review By:

Date:

tp/d#49/956A22x.doc 16

'_I - 4 VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS PAGE CUSTOMER: N/A 1 OF 17 DOCUMENT: TP956A/897A-21X REV. C ISSUE DATE: NOVEMBER 27, 1995 REVISION LIST EC O #

C 4CR37-96

, APPROVAL DATE P ROJECT ENGINEER

-TECHNICAL SUPPORT MANAGER ISUEB***TY:-D ASSURAVIDW ISSUED BY: DAVID WARNER tp/d#49/956a897a.doc

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C RECORD OF REVISIONS DOCUMENT REV. LEVEL DESCRIPTION/PAGES AFFECTED A Supersedes LT956/897 Added Customer -848-8 option for B calibration check in place of 848-8 S/N 119 Added 956A-201-M1 to procedure, Para C 2.1, 7.2; Updated base UDR test procedure, Para 6.2; corrected local alarm contact states, Para 7.2.1, 7.2.5, more verbiage clarifications, Para 2.1, 6.0, 7.1.5, 7.1.12; Updated Data Sheet per above tp/d#49/956A897A.doc 2

VICTOREEN, INC.

TITLE:- TEST PROCEDURE FOR 956A-201 ANbD897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. 'C TABLE OF CONTENTS Description PD Section 1.0 PURPOSE .............................................. 4 2.0 SCOPE ...................................................................... 4 3.0 RESPONSIBILITIES ........................................ 5

-o 4.0 . ENVIRONMENTAL CONDITIONS .. 5

,: 5.0Q" EQUIPMENT REQUIRED 5

-6.0 PREREQUISITES ........................................................ ... 6 7.0 "-'PROCEDURE. . . . . . . . . . . . . 7

(

tp/d#49/956A897A.doc 3

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C 1.0 PURPOSE The purpose of this procedure is to verify the proper operation of a LOW RANGE 955A Area Monitor channel.

2.0 SCOPE 2.1 This procedure is to be performed on all LOW RANGE 955A channels prior to shipment. This procedure gives detailed instructions on integrated testing of the model 956A-201 rate meter (UDR) and model 897A-210 or 897A-211 detectors. Unless stated otherwise, the Model 956A-201 refers to both the 956A-201 and the 956A-201-M1 readout. In addition, this procedure covers integrated testing of 958 or 958A series remote alarm/indicators if supplied. Any combination of the following equipment may be tested using this procedure.

Rate Meter Detector Remote Alarm (Optional) 956A-201 897A-210, 897A-211 958-10, 958A-10 956A-201-Ml 958-40, 958A-40 Note: Space on the Data Sheet is provided to identify and test some possible options such non-standard analog outputs.

2.2 The following functions and operational parameters are tested by this procedure:

2.2.1 956A-201 Display value within tolerance.

2.2.2 956A-201 Analog Outputs within tolerance including optional outputs (if provided).

2.2.3 Check Source response greater than minimum requirements.

2.2.4 Alarm, Warn, Range, Overrange and Fail Actuation.

tp/d#49/956A897A.doc 4

VICTOREEN, INC.

TITLE: -TEST PROCEDURE FOR 956A-201'AND 897A-21X SERIES

-DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REVW C 2.2.5 958/958A Remote Alarm display and annunciation (if applicable).

2.2.6 958A Remote Alarm silence feature (if applicable).

-2.2.7- 958 Remote Alarm relay auxiliary..contacts.(if.applicable).

3.0 RESPONSIBILITIES 3.1 Personnel performing this test must have a Technicians Skill Level 1

. " - per S.O.P. 902.003."'

3.2 Data generated by this test must be reviewed and approved by Q.A.

Sprior to shipment.' In -'addition, -Q.A has the responsibility of maintaining channel or systems test data in'a job file.

3.3 Individuals performing this procedure must insure that it is conducted in such manner as to minimize radiation exposure to both themselves and others. Personal radiation dosimetry is required for any individuals participating in this procedure when a Field Calibrator is in use.

4.0 ENVIRONMENTAL CONDITIONS 4.1 Environmental conditions shall be the prevailing laboratory ambient for temperature and humidity.

5.0 -EQUIPMENT REQUIRED, ' . " , ,

5.1 Customer 848-8 to be supplied with channel -nmust'6be calibrated. If no Customer Calibrator is provided or available, VICTOREEN Model

- ;*.* 848-8 Field Calibrator'Serial Number 1 19'ii to be usedlý

-:5.2, 848-8-105 Field Calibrator -Adapter,-cust6mer provided or Victoreen equipment., , .

5.2.1 848-8-400 Adapter for 897A-211 detectors with stainless steel housing only.

tp/d#49/956A897A.doc 5

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C 5.3 Digital Voltmeter: Fluke 8050A or equivalent - must be calibrated.

5.4 Personal dosimetry.

5.5 Radiation control barriers (yellow/magenta xope) and Radiation Area warning signs (if access control of area cannot be assured).

5.6 Interconnection cables between detector, rate meter and remote alarm (if applicable) refer to one of the following loop diagrams:

5.6.1 956A-201-106

956A-201 ratemeter to 897A-210 or 897A 211 detectors.

5.6.2 958-1-24

As above but including 958-10 or 958-40 Remote Alarm.

5.6.3 958A-1-24

As above but including 958A-10 or 958A-40 Remote Alarm.

5.6.4 Job Specific Loop Diagram (contact project engineer).

5.7 250 ohm , 1 % resistors (2) for 4-20 mA termination.

6.0 PREREQUISITES 6.1 Prior to interconnecting equipment, verify by model number that all of the equipment listed on the sales or work order is present and that all required option boards (if applicable) are installed in the 956A-201 ratemeter.

6.2 Completed and signed copies of CAL-GM6 (897A series detectors) and TP956A-201-3 (956A-201 ratemeter) are required prior to beginning this procedure. Completed and signed copies of any option board tests are also required when option boards are installed.

tp/d#49/956A897A.doc 6

VICTOREEN, INC.

TITLE: -,-TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X -REV.' C 7.0 PROCEDURE 7.1, Preliminary Data and Set-up.

7.1.1 Record the customer, P.O. and S.O. numbers on the Data S..Sheet.

7.1.2 Record the model and serial numbers of all equipment'to be S..... ........ tested.

7.1.3 Record the model serial number and calibration due date of the digital voltmeter.

-7.1.4 Record the 956A-201 firmware number and revision/date on

.the Data Sheet.

7 1.5 Decay correct to the current date the 897A dose rate listed on

.. the 848-8 S/N 119 or Customer 848-8 Calibration Data Sheet for the CLOSED and MID positions. No dose' ratecalculations are required for -the OPEN position -as- it will be used to overrange the unit under test. Enter the decay corrected dose

-rates under .the "Desired" column of the Display/Analog

- Output Table on the Data Sheet.

Decay Formula: Current Dose Rate = R

• e ( -0.693 30.0 30.0 Where R = is the baseline dose rate The elapsed time in years'from the daie'dose rate was determined to the current date 30.0 = the half-life of 1 37-Cs in years Table 1, 137-Cs Half Life Decay Table, may also be used to determine "thecurrent dose rate for this'step.-

tp/d#49/956A897A.doc 7

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C TABLE 1 HALF-LIFE DECAY TABLE FOR Cs-1 37 OVER 10 YEARS (HALF-LIFE 30.00 YEARS)

T . - - --

ELR A~ P S E T IME -- MONTHS YEAR 0 1 2 3 4 5 6 7 8 9 10 11 0 1.000 0.998 0.996 0.994 0.992 0.990 0.989 0.9871 0.985 0.983 0.981 0.979 1 0.977 0.975 0.973 0.972 0.970 0.968 0.966 0.964 0.962 0.960 0.959 0.957 2 0.955 0.953 0.951 0.949 0.948 0.946 0.944 0.942 0.940 0.938 0.937 0.935 3 0.933 0.931 0.929 0.928 0.926 0.924 0.922 0.921 0.919 0.917 0.915 0.913 4 0.912 0.910 0.908 0.906 0.905 0.903 0.901 0.900 0.898 0.896 0.894 0.893 5 0.891 0.889 0.887 0.886 0.884 0.882 0.881 0.879 0.877 0.876 0.874 0.872 6 0.871 0.869 0.867 0.866 0.864 0.862 0.861 0.859 0.857 0.856 0.854 0.852 7 0.851 0.849 0.847 0.846 0.844 0.843 0.841 0.839 0.838 0.836 0.834 0.833 8 0.831 0.830 0.828 0.826 0.825 0.823 0.822 0.820 0.819 0.817 0.815 0.814 4 082I 9 U.0 I/ U.0 I I U. -9 BI 0.RUR 0.8U0 0.805 0.803 0.801 O.RO0 0 7qR f't 7Q7 ('1 7Q*

0.801 080O n '707 n 70z I 7.1.6 Convert the dose rates determined in step 7.1.5 into equivalent analog output voltage and current values for each of the CLOSED and MID calibrator positions using the formulas and examples given below.

First, using the formula below, convert the dose rate to a percentage of full-scale.

P = log(R/LSV)/[Iog(FSV)-Iog(LSV)]

where P = percentage of full-scale in decimal number R = Current dose rate determined in step 7.1.4 LSV = Low Scale Value (Analog Low scale Setpoint)

FSV = Full Scale Value (Analog Full-scale Setpoint) tp/d#49/956A897A.doc 8

VICTOREEN, INC.

TITLE: PROCEDURE FOR 956A-201 AND 897A-21X SERIES STEST DETECTORSS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C, 7.1.7 Next, using the formula below, convert to analog output voltage and current values,.as required-by the configuration of the 956A-201 under test. For a standard 956A-201 this will be 1-5 volts (4-20 mA across 250 ohm) for current loop outputs and 0-10 volts for voltage'output.

V = P(FSV-LSV) + LSV where P = Percent of full-scale as a decimal number FSV = Full-scale voltage

• 2 LSV = Low scale voltage Other optional analog-output voltages are also calculated using the above formula. Record the voltage values for each position of the 848-8 field calibrator on the Data Sheet under the "Desired" column of the Display/Analog Outp3ut Table. Values listed under the OPEN position-on the Data Sheet will be the full-scale value of the specific analog output. Values listed under the FAIL position on the Data Sheet will be the low scale value of the specific analog output.

'7.1.8 Remove jumper J7 from the 956A-201 main circuit board and retain for re-installation."." Jump*er J7 is removed to prevent anti-jam-actuation during testing" 7.1.9 Interconnect' all channel components per standard loop or job specific-drawing and r'ecord the drawing and revision on the Data Sheet. -

tp/d#49/956A897A.doc 9

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C 7.1.10 Terminate-both 4-20 MA analog outputs with the 250 ohm 1% resistors. Analog output #1 is located at P6-1 (+) and P6-2 (-) while analog output #2 is located at P6-3 (+) and P6-4 (-). If no remote alarm is supplied the 0-10 volt output is measured at P6-5 (+) and P6-6 H-). .Refer to .job specific drawings for optional analog outputs that may be supplied.

NOTE: If a remote alarm is included, fill in the 0-10 volt/remote meter desired row on the Data Sheet with mR/h values. If no remote is included, fill in the row with calculated voltage values for each position. Position the Remote Alarm in the vertical position and adjust the mechanical zero (if applicable) prior to power-up.

7.1.11 Apply AC power to the 956A-201 and allow a minimum 15 minute warm-up period to elapse prior to proceeding with testing. Reset any alarms that may have tripped on power-up.

7.1.12 Enter setpoints into the 956A-201 in accordance with Table 2.

TABLE 2 956A-201 Function Data Entry Parameter Switch Position Value High Alarm 0 1.00E2 Warn Alarm 1 1.OOE1 Dead Time (Tau) 2

• Analog Full Scale 3 1.00E3 Overrange 4 1.00E3 Conversion Constant 5

• Analog Low Scale 7 1.00-2 Under Range 9 1.00-2

• See the detector CAL-GM6 Data Sheet for these values.

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VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND,.897A-2'1X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C 7.1.13 If the channel under test contains optional analog outputs, list these optional outputs on the' Data Sheet. If no optional outputs-are provided- enter N/A on the Data Sheet.

7.2 Channel Functional Test Note: If a 956A-201-M1 UDR is supplied as a part of this channel,

-fill out the Aux.High'Relay Functions in 'the Data Sheet Truth Table. If not, enter N/A on the Data'Sheet.

7.2.1 -Place -he detector in a 'low background area away from the field calibrator and complete column 1 of the Data Sheet truth table. If a 958-10 or 958-40 remote alarm is part of the channel under test, verify the following remote alarm internal relay contact logic:

TB1-5 to TB1-7: > 20 meg ohms

-. TB1-6 to TB1-7::< 1 ohm 7.2.2 ,Depress the CHECK SOURCE push-button on the 956A-201 and record the 956A-201 display value on the Data Sheet when the indication.has 'stabilized. A minimum response of

-l0 mR/h is required.

7.2.3 Using the 848-8-105 adapter (and 848-8-400 if a 897A-211 is being tested), place the detector into the 848-8 field

-- calibrator and 'expose the detector to the CLOSED position.

Complete column 2 *of 'the Dat'--Sheet Truth Table and the Display/Analog Output Table, Note: The -897A-21 1 detector is 'jOositioned in the 848-8-400 adapter so that the connector key will be at the 12:00 o'clock

. position relative-to the 6:00 -o'clock position'of the source

, . aperture. '

7.2.4 Withi'-the 848-8 stillin the closed position, depress the 956A 201 ACKNOWLEDGE push-button',an-d, complete column 3 of

,,.theData Sheet Truth Table.,'-'-- -'

7.2.5 Expose the detector to the MID position of the 848-8 field calibrator and hold. Complete column 4 of the Truth Table tp/d#49/956A897A.doc 11

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C and the Display/Analog Output-Table on the Data Sheet. If a 958-10 or 958-40 remote alarm is included, verify the following remote alarm relay contact logic:

TB1-5 to TB1-7: < 1 ohm TB1-6 to TB1-7: > 20 meg ohms 7.2.6 If a 958A-10 or 958A-40 remote alarm is installed, depress the SILENCE push-button on the remote alarm enclosure and complete column 5 of the Data Sheet Truth Table. If 958-10, 958-40 or no remote alarm is installed, fill in column 5 with N/A in each box.

7.2.7 With the 848-8 still in the MID position, depress the 956A-201 ACKNOWLEDGE push-button and complete column 6 of the Data Sheet Truth Table.

7.2.8 Expose the detector to the OPEN position of the 848-8 field calibrator and complete column 7 of the Truth Table and the Display/Analog Output Table on the Data Sheet.

7.2.9 Expose the detector to the MID position of the 848-8 field calibrator and depress the ACKNOWLEDGE push-button on the 956A-201. Complete column 8 of the Truth Table on the Data Sheet.

7.2.10 Remove the detector from the field calibrator and depress the 956A-201 ACKNOWLEDGE push-button. Disconnect the P5 signal connector and note the time. In approximately five (5) minutes, complete column 9 of the Truth Table and the Display/Analog Output Table on the Data Sheet.

7.2.11 Divide each of the "Desired" values in the Display/Analog Output Table by the "Actual" values recorded during testing.

The "Actual" values must be within +/-25% of the calculated "Desired" values for dose rate a'nd voltage. If all values are within tolerance, complete verification. If any values are not within tolerance, reject the channel component that is out of tolerance and forward to the Production Test Department for repair or calibration.

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VICTOREEN, INC.

TITLE: - TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C 7.2.12 Turn off 956A-201 power and remove all interconnection cables. Re-install jumper J7 in the 2-3 position on the

-956A-201 main circuit board assembly.

7.2.13 If all values are within tolerance and the truth table logic is correct, complete and sign the .Data.Sheet.and forward to QA for review. Verify. that all required accessories such as connector kits, mounting brackets and rack chassis are present. Complete and sigrn travelers and forward to "QA with

'-the loop test Data Sheets.

7.2.14 If any portion of this test has not been successfully

-- . . . completed, return the failed component to production test for rework/re calibration as required along.with theData Sheet identifying the failure.

- =, - * = .t .

tp/d#49/956A897A.doc ""13

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C LOOP TEST DATA SHEET Page 1 of 4 Low Range GM Area Monitor Customer: P.O. No.:

Channel ID No.: S.O. No.:

(If Applicable)

Readout Model: Serial No.:

Detector Model: Serial No.:

Remote Alarm Model: Serial No.:

Test Equipment:

Field Calibrator 848-8 S/N 119 or Customer 848-8 S/N D. V. M. Model #: S/N: Cal Due Date:

7.1.4 956A-201 Firmware Part Number: Rev.

7.1.12 Detector Conversion Constant:

Detector Dead Time (Tau):

7.1.13 Analog Output Option 1: Range: to Analog Output Option 2: Range: to tp/d#49/956A897A.doc 14

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS .

CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C LOOP TEST DATA SHEET Page 2 of 4 DATA SHEET TRUTH TABLE Note: Enter N/A in any columns or rows that are'not applicable. .

7.2.1 7.2.3 7.2.4 7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.2.10 Step Col 1 Col 2 Col 3. Col 4 %Col 5 Col 6 Col 7 Col 8 Col 9 Alert Alert"' High "958A High Over OverRng Function Bkgnd Trip Ack Trip Silence Ack Range Reset Fail High _ _

Lamp (Off) (Off) (Off) (Flash) (Flash) (On) (On) (Flash) (Off)

Lamp (Off) (Flash) (on) (On) (On) -On) (Flash) (Off)

Fail ... .. _ _ _ _ _ _ _ _

Lamp (Off) _(Off) (f) ) (Off) (Off) (Off) (Off)

Range Range-__

- ______ ______I (f)(fI(f) ( f) .

(n).ff ..

-Off) (On)

(n (Off) f (Off) (Off) - (On) (Off) Ofn)

Remote Alrm ColmHornHorn (Off)

(Gree) (Off)

__Off__ _______

(Off) __On)_

(On) _______ (Off) 71(On) -(-On)

___On)__ _(On)

_On ____n__O_ (Off)

I Bargraph Color Green) (Amber) (Amber) (Red) (Red) (Red) (Red) (Red) (Off)

High Relay P1-19 to P1.20 (Closed) i (Closed) (Closed) (Open) (Open) I (Open) I (Open) (Open) (Closed)

High Relay P1-19 to P1-21 Aux. Hi Relay-(Open) 70(Open) ____en) (Closed) (Closed) (Closed I (Closed) (Closed) (Open)

PA-1, HCisedR F1-2 (Closed) I__ Closed) (Open) (Open) (Open) en (Open) (Open) (Closed)

A ux . H i R e la y **

P1-1. P1-3 lOoen)

I (Open)

I (Open) (Closed)

I pe n) 7 (Closed) (Closed) (Closed) (Closed) (Open)

Aux. Hi Relay P1-4, PI-5 Ra (CClosed) (Closed (Closed) (Open) (Open)

F (Open--) Open) (Open) (Closed)

Aux. Hi Relay-P1-4, P1-6 (Ooen) (Ooen)

I I (Open) (Closed) (Closed) (Closed) 7(Closed) (Closed) 7 (Open)

Warn Relay _ _I_

P1-13 to P1-14 (Closed) (Open) (Open) (Open)

(Open) (Open) (Open) __ _

(Open) (Closed)

I WarnRlay.___ _T_____ FO____ F___e_____e_

______ __e____ 0PeI Opn _ _____F_____e _n) _(Cosed Warn Relay ___ _ _ ___

I(Coe)

__ Io d) __

P1-13 to P1-15 (Open) (Closed) (Closed) (Closed) (Closed) (Closed) Closed)

{I (Closed) (Open)

Fail Relay_ _ (lsd _ _

P1-7 to P1-8 (Closed) (Closed) (Closed)

(Closed)

_Cosed_

(Closed) (Closed)__ (Open)

Fail Relay P1-7toP1-9 (OIen) (Open) (Open) (Open) (Open) (Open) (Open) (Open) '(Closed)

"**Appliesto 956A-201-M1 Only tp/d#49/956A897A.doc 15

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C LOOP TEST DATA SHEET Page 3 of 4 DATA SHEET TRUTH TABLE 7.2.1 958 Remote Alarm Relay: TB11-5 to TB1 -7 (>20 Meg Ohms)

TB11-6 to TB11-7 (< 1 Ohm) 7.2.2 Check Source Response: (> 10 mR/h) 7.2.5 958 Remote Alarm Relay: TB1-5 to TB11-7 (< I Ohm)

TB1-6 to TB1-7 (> 20 Meg Ohms) tp/d#49/956A897A.doc 16

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-21X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-21X REV. C LOOP TEST DATA SHEET Page 4 of 4 DISPLAY/ANALOG OUTPUT TABLE flAts fl tak* nan n nit, I - -- - - 1 0140-0 /II __ 848-8 SIN Signal Position Position Position Fail CLOSED MID Function Desired I Actual Desired Actual Desired Actual Desired 1 Actual

• 956A-201 in mR/h EEEEE 0.00 Anlg Output 1 1 - 5 Volts 5.00 V 1.00 V Anig Output 2 1 - 5 Volts 5.00 V 1.00 V 0 - 10 Volt 10.00 V 0.00 V or or or Remote Meter 1000 mR/h 0.01 mR/h

"*Analog Option

"* Analog Option

• Enter N/A if no Analog Optional outputs are provided.

• • The "desired" value in this row is the decay corrected 848-8 dose rate.

7.2.11 All "Actual" value within +/-25% of calculated "desired" values (Yes)

Performed By: Date:

Q.A. Review By: Date:

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VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X'SERIES DETECTORS PAGE CUSTOMER: N/A 1 OF 16 DOCUMENT: TP956A/897A-23X -REV. B ISSUE DATE: -,--,JANUARY 9, 1996

- REVISION LIST REV ECO#

B 4CR37-96 APPROVAL DATE PROJECT ENGINEER TECHNICAL-SUPPORT MANAGER "" : /

QUALITY ASSURANCE A____ _____

ISSUED BY: DAVID WARNER tp/d#49/956a23X.doc

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B RECORD OF REVISIONS DOCUMENT REV. LEVEL DESCRIPTION/PAGES AFFECTED A Supersedes LT956/897 Revised Paragraphs 6.2, 7.1.5, 7.1.8, B 7.1.12, 7.2.1, 7.2.5 Identified Tables, and revised Page 2 of the Data Sheet Truth Table tp/d#49/956A 23X.doc 2

VICTOREEN, INC.

TITLE: :TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B TABLE OF CONTENTS Section Description, 1.0 PURPOSE ............................................. 4 2.0 SCOPE.........................4 3.0 RESPONSIBILITIES ........................................ 5 4.0 ENVIRONMENTAL CONDITIONS 5.....................

'-5.0 EQUIPMENTREQUIRED ., .................................. 5

-6.0 PREREQUISITES ........ ................................. 6 7.0 PROCEDURE.................. ......................... 7 tp/d #49/95 6A2 3X.doc 3

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B 1.0 PURPOSE The purpose of this procedure is to verify the proper operation of a complete HIGH RANGE 955A Area Monitor channel.

2.0 SCOPE 2.1 This procedure is to be performed on all HIGH RANGE 955A channels prior to shipment. This procedure gives detailed instructions on integrated testing of the model 956A-201 rate meter (UDR) and model 897A-230 or 897A-231 detectors. In addition, this procedure covers integrated testing of 958 or 958A series remote alarm/indicators if supplied. Any combination of the following equipment may be tested using this procedure.

Rate Meter Detector Remote Alarm (Optional) 956A-201 897A-230, 897A-231 958-30, 958A-30 958-40, 958A-40 Note: Space on the Data Sheet is provided to identify and test some possible options such non-standard analog outputs.

2.2 The following functions and operational parameters are tested by this procedure:

2.2.1 956A-201 Display value within tolerance.

2.2.2 956A-201 Analog Outputs within tolerance including optional outputs (if provided).

2.2.3 Check Source response greater than minimum requirements.

2.2.4 Alarm, Warn, Range, Overrange and Fail Actuation.

tp/d#49/956A23X.doc 4

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. 'B 2.2.5 958/958A Remote Alarm display and annunciation (if II'l- applicable).

2.2.6 958A Remote Alarm silence feature (if applicable).

,2.2.7 958 Remote Alarm relay auxiliary contacts (if applicable).

3.0 RES PONSIBILITIES - ";

3.1 Personnel performing this test must have a Technicians Skill Level 1

• perS.O.P. 902.003., ,

3.2 Data generated by this test must be reviewed and approved by Q.A.

- prior to shipment. ,In addition, . Q.A has the responsibility of maintaining channel or systems test data in a job file.

. -

• 3.3 -Individuals performing this procedure must insure-Ithaj it is conducted in such manner as to minimize radiation 'exposure to both themselves and others. Personal radiation dosimetry is required for any individuals participating in this procedure when a Field Calibrator is in use.

4.0 ENVIRONMENTAL CONDITIONS 4.1 Environmental conditions shall be the prevailing laboratory ambient for temperature and humidity.

5.0' EQUIPMENT REQUIRED "5.1 Customer 848-8 to be supplied with channel -- rmust be calibrated. If no Customer Calibrator is provided or available, VICTOREEN Model

• ,848-8 Field Calibrator Serial Number 119 isto be used.*

5.2 848-8-105 Field Calibrator Adapter, customer -provided or Victoreen equipment. ,

5.2.1 848-8-400 Adapter for 897A-231 detectors with stainless steel housing only.

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VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B 5.3 Digital Voltmeter: Fluke 8050A or equivalent - must be calibrated.

5.4 Personal dosimetry.

5.5 Radiation control barriers (yellow/magenta rope) and Radiation Area warning signs (if access control of area cannot be assured).

5.6 Interconnection cables between detector, rate meter and remote alarm (if applicable) refer to one of the following loop diagrams:

5.6.1 956A-201-106

956A-201 ratermeter to 897A-230 or 897A 231 detectors.

5.6.2 958-1-24

As above but including 958-30 or 958-40 Remote Alarm.

5.6.3 958A-1-24

As above but including 958A-30 or 958A-40 Remote Alarm.

5.6.4 Job Specific Loop Diagram (contact project engineer).

5.7 250 ohm, 1 % resistors (2) for 4-20 mA termination.

6.0 PREREQUISITES 6.1 Prior to interconnecting equipment, verify by model number that all of the equipment listed on the sales or work order is present and that all required option boards (if applicable) are installed in the 956A-201 ratemeter.

6.2 Completed and signed copies of CAL-GM6 (897A series detectors) and TP956A-201-3 (956A-201 ratemeter) are required prior to beginning this procedure. Completed and signed copies of any option board tests are also required when option boards are installed.

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VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV.-B 7.0 PROCEDURE 7.1 Preliminary Data and Set-up.

7.1.1 Record the customer, P.O. and S.O. numbers on the Data Sheet.

7.1.2 Record the model and serial numbers of all equipment to'be tested.

'71.- Record the model serial "number and calibration due- date of the digital ,voltmeter.

7.1.4-- Record the 956A-201 firmware number and revision/date on

-the -Data Sheet.

7.1.5,_ -Decay correct to the current date the 897A dose-rate listed on the 848-8 S/N 119 or Customer 848-8 Calibration Data Sheet for the CLOSED and MID positions. No dose rate calculations are required for the OPEN position as-it will be "us6d to overrange the unit under test. Enter the decay corrected dos'e rates under the "Desired" column of the Display/Analog Output Table on the Data Sheet.

Decay Formula:- Current Dose Rate- S'(t 2 tl)

R

• e- (-0.693 "30.0 Where R = is the baseline'dose rate The elapsed time in years from the date dose rate was determined to the current date ' " . -

30.0 S-=* the half-life of 1 37-Cs in years Table 1, 137-Cs Half Life Decay Table,,"ray also be used to determine the current dose rate for this step. .,

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VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B TABLE 1 HALF-LIFE DECAY TABLE FOR Cs-i 37. OVER .10 YEARS (HALF-LIFE 30.00 YEARS)

I --

E L A r S E D TI M E MONTHS YEAR 0 1 2 3 4 5 6 7 8 9 10 11 0 1.000 0.998 0.996 0.994 0.992 0.990 0.989 0.987 0.985 0.983 0.981 0.979 1 0.977 0.975 0.973 0.972 0.970 0.968 0.966 0.964 0.962 0.960 0.959 0.957 2 0.955 0.953 0.951 0.949 0.948 0.946 0.944 0.942 0.940 0.938 0.937 0.935 3 0.933 0.931 0.929 0.928 0.926 0.924 0.922 0.921 0.919 0.917 0.915 0.913 4 0.912 0.910 0.908 0.906 0.905 0.903 0.901 0.900 0.898 0.896 0.894 0.893 5 0.891 0.889 0.887 0.886 0.884 0.882 0.881 0.879 0.877 0.876 0.874 0.872 6 0.871 0.869 0.867 0.866 0.864 0.862 0.861 0.859 0.857 0.856 0.854 0.852 7 0.851 0.849 0.847 0.846 0.844 0.843 0.841 0.839 0.838 0.836 0.834 0.833 8 0.831 0.830 0.828 0.826 0.825 0.823 0.822 0.820 0.819 0.817 0.815 0.814 9 1 0.812 I 0.811 0.809 0.808 0.806 0.805 O.8OR

~~ -7 S")00 0.806 0.805 I. 0803 nr ~r

______ a70 n 7.1.6 Convert the dose rates determined in steD 7.1 .5 into equivalent analog output voltage and current values te 7... .into for each of the CLOSED and MID calibrator positions using the formulas and examples given below.

First, using the formula below, convert the dose rate to a percentage of full-scale.

P = log(R/LSV)/[Iog(FSV)-log(LSV)]

where P = percentage of full-scale in decimal number R = Current dose rate determined in step 7.1.4 LSV = Low Scale Value (Analog Low scale Setpoint)

FSV = Full Scale Value (Analog Full-scale Setpoint) tp/d#49/956A23X.doc 8

VICTOREEN, INC.

TITLE: LTEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B 7.1 .7 :Next, using the formula below, cbnvert to analog output voltage and current values as required by the configuration of the 956A-201 under..test. For-a.-standard 256A-201 this will be 1-5 volts (4-20 mA across 250 ohm) for current loop outputs and 0-10 volts for voltage output.

,V.- = P(FSV-LSV) + LSV where P ,= Percent of full-scale as a decimal number FSV = Full-scale voltage r LSV Low scale voltage Other optional analog output voltages are also calculated using the above formula. Record the voltage values-for each position of the 848-8 field calibrator on the Data Sheet under the "Desired" column of the Display/Analog Output Table. Values listed under the OPEN position on the Data Sheet will be the full-scale value of the specific analog _output. Values listed under the FAIL "pbsition' on the. Data Sheet will be the low scale value of the specificanalog-output.

• -7.1.8

- . Remove jumper J7 from the 956A-201 main:circuit board and

---retain -for-re-installation.--Jumper- J7 is--emoved to prevent

-.anti-jam actuation during testing.

7.1.9- Interconnect all channel components per standard loop or job

-specific drawing and-record the drawing and revision on the

--Data Sheet. . . -- ' " - -

, tp/d#49/956A23X.doc 9

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B 7.1.10 Terminate both 4-20 MA analog outputs with the 250 ohm 1% resistors. Analog output #1 is located at P6-1 (+) and P6-2 (-) while analog output #2 is located at P6-3 (+) and P6-4 (-). If no remote alarm is supplied the 0-10 volt output is measured at P6-5 (+) and P6-6 (-. Refer to job specific drawings for optional analog outputs that may be supplied.

NOTE: If a remote alarm is included, fill in the 0-10 volt/remote meter desired row on the Data Sheet with mR/h values. If no remote is included, fill in the row with calculated voltage values for each position. Position the Remote Alarm in the vertical position and adjust the mechanical zero (if applicable) prior to power-up.

7.1.11 Apply AC power to the 956A-201 and allow a minimum 15 minute warm-up period to elapse prior to proceeding with testing. Reset any alarms that may have tripped on power-up.

7.1.12 Enter setpoints into the 956A-201 in accordance with Table 2.

TABLE 2 956A-201 Function Data Entry Parameter Switch Position Value High Alarm 0 1.00E2 Warn Alarm 1 1.OOE1 Dead Time (Tau) 2

• Analog Full Scale 3 1.00E5 Overrange 4 1 .0OE3 Conversion Constant 5

• Analog Low Scale 7 1.00-EQ Under Range 9 1.00-EQ See the detector CAL-GM6 Data Sheet for these values.

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VICTOREEN, INC.

TITLE: . TEST-PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV.' Bl 7.1.13 If the channel under test contains optional analog outputs, list

" qthese optional 'outputs on the Data Sheet.

If no optional

" 66utputs are provided, enter N/A on the Data Sheet.

7.2 -'Channel Functional Test 7.2.1 Place the detector in a low, background area away from the

- -field calibrator anid"complete column'1 of the Data Sheet truth table. If -a 958-30 or 958-40 remote alarm is part of the

,channelt under test, verify the following remote alarm internal relay contact logic:

TB1-5 to TB1-7: >'20 meg ohms TB1-6 to TB1-7: < 1 ohm 7.2.2 Depress the CHECK SOURCE push button on the 956A-201 and record the -956A-201, display value "n the Data Sheet when the indication"has-stabilized. A minimum response of 10 mR/h is require'd.°-,

U

.2 . F C.. '

- II I.' . -

..I tp/d#49/956A23X.doc ""11

VICTOREEN, INC.

TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B 7.2.3 Using the 848-8-105 adapter (and 848-8-400 if a 897A-231 is being tested), place the detector into the 848-8 field calibrator and expose the detector to the CLOSED position.

Complete column 2 of the Data Sheet Truth Table and the Display/Analog Output Table.

Note: The 897A-231 detector is positioned in the 848-8-400 adapter so that the connector key will be at'the 12:00 o'clock position relative to the 6:00 o'clock position of the source aperture.

7.2.4 With the 848-8 still in the closed position, depress the 956A 201 ACKNOWLEDGE push-button and complete column 3 of the Data Sheet Truth Table.

7.2.5 Expose the detector to the MID position of the 848-8 field calibrator and hold. Complete column 4 of the Truth Table and the Display/Analog Output Table on the Data Sheet. If a 958-30 or 958-40 remote alarm is included, verify the following remote alarm relay contact logic:

TB1-5toTB1-7: < 1 ohm TB1-6 to TB1-7: > 20 meg ohms 7.2.6 If a 958A-30 or 958A-40 remote alarm is installed, depress the SILENCE push-button on the remote alarm enclosure and complete column 5 of the Data Sheet Truth Table. If 958-30, 958-40 or no remote alarm is installed, fill in column 5 with N/A in each box.

7.2.7 With the 848-8 still in the MID position, depress the 956A 201 ACKNOWLEDGE push-button and complete column 6 of the Data Sheet Truth Table.

7.2.8 Expose the detector to the OPEN position of the 848-8 field calibrator and complete column 7 of the Truth Table and the Display/Analog Output Table on the Data Sheet.

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TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X ,REV.- B 7.2.9 Expose the detector to the MID position of the 848-8 field calibrator and depress the ACKNOWLEDGE push-button on the 956A-201. Complete-, column 8 of the Truth Table on the Data Sheet.

7.2.10 Remove the detector from the field calibrator and depress the 956A-201 ACKNOWLEDGE push-button. Disconnect-the P5 signal connector and note the time. in approximately five (5) minutes, complete column 9 of the Truth Table, and the Display/Analog Output Table on thie Data -Sheet.

7.2.11 Divide each of the "Desired" values in the Display/Analog

-Output Table by the "Actual" values recorded during testing.

The "Actual" values must be within +/-25% of the calculated "Desired" values for dose rate and voltage. If all values are within tolerance, complete verification. If. any values 'are not

. within tolerance, reject the channel component that is out of

.tolerance and forward to the Production Test Department for repair or calibration.

Enter a value of 1.00E5 in position 4 (OVER RANGE).

3 Turn bff 956A -20 1 -power and rem ove all interconnection cables. Re-install jumper J7- in the 2-3 position on the 956A 201 main circuit board assembly.

7.2.14 If all values are within tolerance and the truth table logic is correct, complete and'sign the Data Sheet and -forward to QA for review. Verify that all required accessories such as

. connector -kits, mounting .brackets and rack chassis are present. Complete and sign travelers and forward to QA with the loop test Data Sheets.

7.2.15 If any portion of this test has not been successfully

_ completed, return the' failed "component to production test for rework/re calibration as required along with the Data Sheet identifying the failure.

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TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B LOOP TEST DATA SHEET Page 1 of 3 High Range GM Area Monitor Customer: P.O. No.:

Channel ID No.: S.O. No.:

(If Applicable)

Readout Model: Serial No.:

Detector Model: Serial No.:

Remote Alarm Model: Serial No.:

Test Equipment:

Field Calibrator 848-8 S/N 119 or Customer 848-8 S/N D. V. M. Model #: S/N: Cal Due Date:

7.1.4 956A-201 Firmware Part Number: Rev.

7.1.12 Detector Conversion Constant:

Detector Dead Time (Tau):

7.1.13 Analog Output Option 1: Range: to Analog Output Option 2: Range: to tp/d#49/956A2 3 X.doc 14

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TITLE: TES

T. PROCEDURE

FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X -REV. B LOOP TEST DATA SHEET Page 2 of 3

-DATA SHEET TRUTH TABLE Note: Enter N/A in any columns or rows that are not nnnlit-ahl-7.2.1 7.2.3 7.2.4 7.2.5 7.2.6 7.2.7 7.2.8 7.2.9 7.2.10 Step Col 1 Col 2 Col 3 Col 4 Col 5 Col 6 Col 7 Col 8 Col 9

-Alert Alert' High - 958A High Over OverRng Function Bkgnd Trip Ack Trip, Silence Ack Range Reset Fail High ... . - - i ias "

Lamp - (Off) -7 Off) (Off) (F-lash) (Flash) 'O(n) on) -Flash) (Off)

Warn _ _ _ _ _ _ _ _j_

J I Lamp ( Off) (Flash) (On) ((On) (On)

(On) o n) (Flash) (Off)

Fail_ __ _ _ _ _ __ __ __

Lamp (off) (Off) (Off) (Off) (Off)

- (Off) (Off) (Off) (On)

Range .. .... . . ..

Lamp (Off) (Off) (Off) (Off) I(Off)I TOff) -TOn) O0ff) (On)

Remote (

Alrm Lamp .... (Off) (Off) (Off) (On) _ _(On)_

_ (On) (On) (On) (Off)

Remote -

Airm Horn (Off) n I W_1_

(Off) (

Of (On) ((Off)

I _

(On)

(On)

(Off0 Ba rg ra p h . . . ..

Color (Green) (Amber) (Amber) (Red) (ReRd) (TRRed) ( (Red) (Off)

High Relay P1-19 to P1-20 f (Closed (Closed) (Closed) (Open) (Open) 7 (Open) T(Open) " (Open) (Closed)

P1-19to P1-21 Warn Relay (Open)

(

HighRely (Open)

(Open) pen (opeI),

__Closed_

Cloed)

(Closed)

(Closed)

-_______I (Cl-osed_

(losd)

_ Closed

C-losed)

(Open)

(pn P1-13 to P1-14 (Closed) (Open) (Open) en jen)

) -OTeo Oen) Co p (Open) (Closed)

W arn Relay P1-13 to P1-15 7Openi 7 (Closed) 7Closd I (Closed)

C

[

(Closed)

_ "_-_ _ I - I _

I Cl,-sed)' (Closed) (Open)

Fail Relay P1-7 to P1-8 (Closed) (Closed) (Closed) (Closed) (Closed) (Closed) (Closed) (Closed)

J (Open)

Fail Relay (

P1-7 to P1-9 (Open) I (Open)_Open_ en) n) ((Open) Open) (Open) (Closed)

• Except with 95BA-30 or 958A-40 Remote Alarm 7.2.1 958 Remote Alarm Relay: TB1-5 to TB1-7 (> 20 Meg Ohms)

TB1-6 to- TB1-7 <( 1 Ohm) 7.2.2 Check Source Response: ____-..(>.10 mR/h)."

7.2.5 -958 Remote Alarm Relay: TB1-5 to TB1-7 (< 1 Ohm)

TB1-6 to TB1-7 (> 20 Meg Ohms) tp/d#49/956A23X.doc 15

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TITLE: TEST PROCEDURE FOR 956A-201 AND 897A-23X SERIES DETECTORS CUSTOMER: N/A DOCUMENT: TP956A/897A-23X REV. B LOOP TEST DATA SHEET Page 3 of 3 DISPLAY/ANALOG OUTPUT TABLE 848-8 SIN ,848-8 SIN k ____r_

848-8 S/N Signal Position Position Position Fail CLOSED SMID OP;:N

. .wig.

Function Desired Actual Desired Actual Desired Actual Desired Actual 956A-201 in mR/h EEEEE 0.00 Anig Output 1 1 - 5 Volts 5.00 V 1.00 V Anig Output 2 1 - 5 Volts 5.00 V 1.00 V 0 - 10 Volt 10.00 V 0.00 v or or or Remote Meter, 1.00E5 mR/h 1 mR/h

• Analog Option

• Analog Option

• Enter N/A if no Analog Optional outputs are provided.

• • The "desired" value in this row is the decay corrected 848-8 dose rate.

7.2.11 All "Actual" value within +/-25% of calculated "desired" values (Yes) 7.2.12 Value of 1.00E5 entered in position 4 (Yes)

Performed By: Date:

Q.A. Review By: Date:

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