ML21105A779
| ML21105A779 | |
| Person / Time | |
|---|---|
| Site: | Consolidated Interim Storage Facility |
| Issue date: | 04/12/2021 |
| From: | Consolidated Interim Storage Facility |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML21105A766 | List: |
| References | |
| E-58496 | |
| Download: ML21105A779 (121) | |
Text
WCS Consolidated Interim Storage Facility Safety Analysis Report Revision 5 Attachment G Technical Specifications for Towers (120 pages)
Page G-1
0 Solar Radiation Sensors Solar energy is a significant element in large-scale atmos-pheric motion, and as a result it has an important place in meteorology. It is directly relat ed to atmospheric stability, and is used in determining stability classes for pollution studies. Met One Instruments supplies solar sensors to meet virtually any monitoring requirement.
Model 095 Pyranometer The Model 095 Pyranometer incorporates a multi-junction differential thermopile and a precision ground optical glass hemisphere which is transpar-ent to wave lengths 0.285 to 2.80 microns. It is used for high-precision, broad-band measurements of incident 0 solar radiation.
Features Modelo~:
o Differential thermopile radiation. Built in thermistor detector circuitry is incorporated to o High accuracy, broad eliminate the effects of ambient bandwidth temperature.
o Temperature compensated o Rapid response time The single hemispherical optical o Built-in leveling devices glass dome has a waterproof seal, but can easily be removed The detector element is of for repairs. The case is cast alu-wirewound-plated construction minum, painted white, and is fit-with black and white seg- ted with a desiccator, circular ments. When exposed to solar level, and leveling screws. A radiation the differing absorp- mounting base with a vertical tivity of the black and white 3/4" IPS pipe simplifies field surfaces develops a tempera- installation of the sensor. This ture differential. The ther- rugged instrument is capable of mopile then produces a volt- withstanding mechanical vibra-age proportional to the solar tions of up to 20 G's.
0 Met One Instruments, Inc.
Corporate Sales & Service: 1600 Washington Blvd ., Grants Pass, OR 97526, Phone (541) 471 -7111 , Fax (541) 471 -71 ~ El Distribution & Service: 3206 Main Street, Suite 106, Rowlett, TX 75088, Phone (972) 412-4747, Fax (972) 412-4716 http:l/www.metone.com
Solar Sensor Specifications:;
0 Model095 Me>~el 394 Model 096 Model097 Spectral Response nanometers 285 to 2800 285 to 2800 (clear)" 400 to 1100 250to 60000 microns 0.28 to 2.80 0.2~ to 2.80 (clear) 0.4 to 1.1 0.25 to60 Calibration Integrating hemisphere lnte ~rating hemisphere against Eppley B&W against transfer approx. 1 cal cm 2 app rox. 1 cal cm*2 under natural daylight standard and min 1, at 25°C min 1. at 25°C compared to a tungsten-halide light source Sensitivity** 11 mV/kwatt meter 2, 9 rr-. ""'V/kwatt meter-2, 8.0 mV/kwatt meter-2 75 mV/kwatt approx. approx. with 100 Ohm load. meter*2, approx.
approx.
Impedance 350 Ohms, approx. 65C> Ohms 1000hm load 40hms (dependent upon sensor sensitMty)
Temperature Dependence +/- 1.5% constancy +/-1 ~ constancy +/-0.15%/degree C, N/A from -20 to +40° C fro,....-, - 20° to +40° C maximum Linearity +/-1% from Oto +/-0. ES% from Oto +/-1% from Oto N/A Response time 1400 watts meter 2 5 seconds 28C> 0 watts meter 2 3000 watts meter*2 10 microseconds 0
ls~cond 10.5 seconds (1/e signal) (1/~ signal) (10% to 90%)
Cosine Response :1:2% from normalization +/-1~ from normalization Corrected up to 82° N/A 0° -70° zenith angle; o*- ..,..-0° zenith angle Incident angle.
+/-5% 70°-80° zenith +/-3~ from 70°*80° Azimuth error less angle zen *"th angle than 1% over 360° at 45° elevation Physical Size 5.75" dia. x 21" H 5.7 es" dia. x 23~ H 3" dia. x 19" H 2.8" W x 2.5" H (including mount) x 37" L Weight 4 lbs (1.8 KG) 9 lb :s (4 KG) 1.2 lbs (.54 KG) 3 lbs (1.3 KG)
(including mount)
Mounting Leveling plate and Lev Ealing plate and Leveling plate and Mounting plate mounting base included mo L-1 nting base inc1uded mounting base included for support Requires #1552 fitting ReC'.::::9 uires #1552 fitting Requires # 1552 fitting arm included or similar device or s. i milar device or similar device Cable #1138-xx #11 38-xx #1832-xx #2437 -xx (xx = length in feet)
- Contact factory for other ranges.
- Sensitivity varies among sensors of the same type.
()
A Cafibration Certificate Is supplied with each sense::> r.
0 MODEL 96-1 SOLAR RADIATION SENSOR OPERATION MANUAL 0
1600 Washington Blvd. Regional Sales & Service Grants Pass, Oregon 97526 3206 Main St., Suite 106 Telephone 541-471-7111 Rowlett, Texas 75088 Facsimile 541-471-7116 Telephone 214-412-4747 Met One Facsimile 214-412-4716 Instruments
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()
c 096*1 SOLAR RADIATION SENSOR 1.0 GENERALINFORMATION 1.1 The Model 096-1 Solar Radiation Sensor Is an accurate and sensitive sensor using a LI-COR sensing element and designed for the continous measurement of solar radiation.
Typically, the sensor is mounted with the 1289 Mounting Plate.
1 .2 Spectral Response. The relative spectral response of the silicon photodlode does not extend uniformly over the full solar radiation range. A typical response curve Is presented In Figure 1.1. The response Is very low at 0.4 µm and then Increases nearly linear lo a cutoff near 1.1 µm. Changes In the speclral distribution of the Incident llght, coupled with the non-uniform spectral response, can cause errors In the photodlode output. Hull3 shows that In the 0.4 to 0.7 µm range, the spectral distribution of sun plus sky radiation on a horizontal surface Is remarkably constant even when clear and overcast days are compared. However, Gates2 Indicates that the major change in spectral distribution of solar radiation occurs In the near lnfared where water vapor absorption takes place on cloudy days. Data collected at low solar elevations can show significant error because of altered spectral distribution which changes In atmospheric transmission. This Is a small part of the dally total so the possible observed error usually has an Insignificant effect on dally Integrations.
The area under the spectral irradiance curve of the source Is dlrecUy porportlonal to the energy received by a horizontal surface. Under specific but typical conditions, energy received on a completely overcast day has been estimated to be 11.3% of that 0 received on a clear day. When both spectral distributions are weighted according to a typical response curve of a silicon photodlode, the response on this cloudy day Is 12.6%.
Therefore, errors Incurred under different sky conditions, due to the spectral response of the photodlode, will be small. The field tests of Federer and Tanner1 and Kerr, Thurtell and Tanner4 confirm this conclusion.
1.3 Calibration. The 096-1 Pyranometer has been calibrated against an Eppley Precision Spectral Pyramonmeter (PSP) of which the calibration Is periodically confirmed. The calibration was performed under daylight conditions by a computer sampling of Instantaneous readings from the Eppley and LI-CCR pyranometers. Instantaneous readings were taken continuously for 1O minutes and then averaged. Sequential ten minute averaging periods were run from sunup to sundown for 3-4 days. These ten minute averages were then evaluated and used to compute an average calibration constant. The uncertainty of calibration Is +/- 5%.
Table 1-1 Model 096-1 Solar Radiation Sensor Specifications Calibration Calibrated against an Eppley Pyranometer under natural daylight clear conditions.
Absolute accuracy under these conditions is
+/-5%. All sensors are calibrated to within 1% of each other.
096-1 SR Rev. 7193
Sensitivity Typically 80 mlcroamp/1 ooo watts m-2.
Linearity Maximum deviation of 1% to 3000 watts m-2.
Stability Less than 2% change over a 1 year period.
Response Time (10-90%) 1O microseconds Temperature Dependence +/- .15% per °C maximum Cosine Correction Cosine corrected up to 82° angle of Incidence.
Azimuth Error Less than 1% over 360° at 45° elevation.
Sensor Case Weather-proof anodized aluminum case with diffuser and stainless steel hardware. Precision level supplied.
Mounting A 1289 Mounting Plate Is provided.
- 2. 0 INSTALLATION 0
2.1 096-1 Solar Radiation Sensor Installation A. Typically, the sensor Is mounted to the 1289 Mounting Plate. Refer to Figure 2-1. Using a 1552 Mounting Clamp, the radiation sensor and mounting plate may be directly mounted to Met One Instruments' Model 191 Mounting Arm, or similar.
B. For proper operation It Is necessary that the sensor be level. Level the sensor using the three outer screws. Lock Into place using three Inner screws.
C. The sensor is supplied with an attached 1832 cable. The white or red wire Is the
+ signal. The black wire is the common.
3 .O 096-1 SOLAR RADIATION SENSOR CHECK-OUT 3 .1 Model 096-1 Solar Radiation Sensor has been calibrated at the factory. It will not change unless it is damaged. To check for proper operation of the sensor, expose the sensor to bright sunlight and check datalogger or translator for reasonable output, and then completely cover the sensor with a black tape and check for an output of near zero.
096-1 SR Rev. 7193
3 .2 When this sensor is used with a Met One Instruments translator, the translator
) calibration is matched to the individual sensor. If used with dataloggers or other recording devices the use of a terminating resistor is required.
3.3 Terminating Resistor A. The resistor is used to convert the current output signal to a voltage output signal, and is required when the sensor is connected to mllllvolt recording devices.
B. A precision 1oon or1 son resistor has been supplied with the sensor to allow for the correct interface between the sensor and mllllvolt recording electronics (not required when the 096-1 Is used wjth the Met One lnstryments Translator circuit cards). Place this resistor In parallel with the slgnal leads from the sensor. The output signal is then equal to:
Mv *I
- R Where:
Mv .. Output microvolts I ... Output signal In mlcroamps A = Resistance In ohms of terminating resistor
- 4. O MAINTENANCE AND TROUBLESHOOTING 0 4.1 General Maintenance Schedule*
A Inspect sensor for proper operation as per Section 3.0.
B. Clean sensor element monthly using clean rag or tissue.
- schedule Is based on average to adverse environments.
REFEAEJ\CES
- 1. Federer, C.A., and C.B. Tanner, 1965. A simple integrating pyranometer for measuring daily solar radiation. J. Geophys, Res. 70, 2301-2306.
- 2. Gates, D.M.,1965. Radiant energy, its receipt and disposal. Meteor. Monogr.,6,No.28, 1-26.
- 3. Hull,J.N.,1954. Spectral distribution of radiation from sun and sky. Trans.mun.Eng.
Soc.(London),19:21-28.
- 4. Kerr, J.P.,G.W Thurtell, and C.B. Tanner,1967. An integrating pyranometer for cllmatologlcal observer stations and mescoscale networks. Journal of Applied Meleorology,6,688*0694.
)
096*1 SR Rev. 7/93
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') Wind Speed Sensor l1llt!1 The Model 014A Wind Speed Sensor is an accurate, durable, and economical anemometer suitable for a wide range of wind study applications. It is designed for long term unattended operation in most meteorological environments Features o Range to 100 mph o Low starting threshold o Broad temperature operating range o Accuracy of +/- 1 5%
o Stainless steel and aluminum construction Operation For maximum operat*onal reha-b1llty, the sensor uses a sealed magnetic read switch This switch produces a series of con- Accuracy, reliability and economy make the Model 014A tact closures at a rate propor-tional to wind speed With its Wind Speed Sensor an ideal choice for most applications.
pulsed output, the Model 014A lends itself to applications best corrosion resistant materi- quick-connect sensor cable.
involving both digital and analog als. such as stainless steels and Cable length may extend hun-measurement systems. anodized aluminum are used. dreds of feet without affecting The Mode' 014A sensor uses a measurement performance.
The pulsed signal may be con-verted to standardized analog voltage and/or current output by Specifications use of translator electronics. Range 0-100 mph o ;rect connection to a datalogger Starting threshold 1 mph is also possible The robust Accuracy +/-.25 mph or 1.5% FS aluminum cup assembly normally Distance Constant supphed has a distance Standard <15 feet (Metal Cup Assy) constant of < 15 feet. For greater Fast Response <5 feet (Lexan Cup Assy) sensitivity, the optional Lexan Operating Range -50° C to +70° C plastic cup assembly may be Contact Rating 10 mA maximum specified, wh ich has a distance Weight 11 ounces constant of <5 feet. Mounting Model 191 Cross Arm Construction Ordering Information The construction of the sensor Standard Model 014A (Metal Cup}
reflects the requirement for relia- Fast Response Model 014A-1 (lexan Cup) bility and durability. Only the Cable #1805-xx (xx= length in feet) 0 Met One Instruments, Inc.
Corporate Sales & Service: 1600 Washington Blvd., Grants Pass, OR 97526, Phone (541) 471*7111, Fax (541) 471-7116 Oistnbution & Service* 3206 Main Street, Suite 106, Rowlett, TX 75088, Phone (972) 412*4747, Fax (972) 412*4716 http://Www metone.com 014A *REV. 12/26.195
0 0
0
MODEL01 4A WIND SPEED SENSOR OPERATION MANUAL Document No. 014A-9800 0
1600 Washington Blvd. Regional Sales & Service Grants Pass, Oregon 97526 3206 Main St., Suite 106 Telephone 541-471-7111 Rowlett, Texas 75088 Facsimile 541-471-7116 Telephone 972-412-4715 Met One Facsimile 972-412-4716 Instruments
0 0
0
014A WIND SPEED SENSOR 1.0 GENERAL INFORMATION
- 1. 1 The Met One 014A Wind Speed Sensor uses a durable 3-cup anemometer assembl y and simple magnet-reed switch assembly to produce a series of contact closures whose frequency Is proportional to wind speed. This sensor Is usually used in conjunct ion with the 191 Crossarm Assembly and a translator module, but may also be used directly with a variety of dataloggers.
1 .2 Sensor Cable has a quick-connect connector with vinyl-jacketed, shielded cable.
Cable length is given in -XX feet on each cable part number.
Table 1 - 1 Model 014A Wind Speed Sensor Specifications performa nce Characteristics Maximum Operating Range 0-60 meters/s ec or 0-125 mph Starting Speed .5 meters/sec or 1 mph Calibrated Range 0-50 meters/s ec or 0*100 Accuracy +/-1.5% or 0.25 mph Temperature Range c
-50" to ssa c Distance Constant9 0 Standar d (1812 Aluminum Cup Assembly)
Optional (1708 Lexan Cup Less than 15 feet Assemb ly) Less than 5 feet
- The distance traveled by the air after a sharp-edged gust has occurred for the anemometer rate to reach 63% of the new speed.
Electrjca! Charact erjstjcs Output Signal Contact closure at frequency V= (f x 1.7892) + 1 mph Physica l Charact eristics Weight 1.5 lbs.
Finish Anodized Mounting Fixtures Use with 191 Crossarm Cabling 2-Conductor Cable, XX is cable length In feet Optional Accessories (a)1708 Lexan Cup Assembly, Fast Response Type 014A-9800 REV. 9/96 1
- 2. 0 INSTALLATION ()
- 2. 1 014A Wind Speed Sensor Installation A Check to see that the cup assembly rotates freely (threshold, bearing check).
B. Install the sensor into the fitting on the end of the 191 mounting arm. (THE END WITHOUT THE ALIGNMENT BUSHING) Install iust deep enough to allow cable connection. (Reference the mounting detail in Figure 2*1 ).
C. Apply a small amount of silicone grease to the set screws to prevent 'freezing up' in corrosive environments. Tighten the locking set screws-do not over tighten.
D. Connect the Cable Assembly to the connector receptacle on base of sensor. Secure the cable to the mounting arm using cable ties or tape.
2.2 Wiring The Cable Assembly contains three wires.
Black = Signal RB:I = Common White/Brn = Cable Shield 0
)
014A-9800 REV. 9/96 2
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014A Wind Speed Rev. 4/ll/8 9
(J TABLE 3*1 MODEL 014A WIND SPEED SENSOR CALIBRATION WIND VELOCITY VS OUTPUT FREQUENCY RPM VS WIND SPEED Speed In Miles/Hr V mph RPS F hz RPM MPS MPH F hz 10 2.515 5.030 100 3.113 6.964 3.333 20 5.310 10.619 200 5.779 12.928 6.667 30 8.104 16.208 '" *300 8.446 18.892 10.000 40 10.899 21.797 400 11.112 24.856 13.333 50 13.693 27.386 500 13.778 30.820 16.667 60 16.488 32.975 *500 16.444 36.785 20.000 70 19.282 38.564 700 19.110 42.749 23.333 80 22.077 44.153 800 21.777 48.713 26.667 90 24.871 49.742 900 24.443 54.670 30.000 100 27.666 55.331 1000 27.109 60.641 33.333 110 30.460 60.920 1100 29.775 66.605 36.667 120 33.255 66.509 1200 32 .441 72.569 40.000 1300 35.108 78.533 43.333 SPEED IN METERS/SEC 1400 37.774 84.497 46.667 V mps 2.5 RPS 1.284 F hz 2.567 1500 1600 40.440 43.106 90.461 96.426 50.000 53.333 ()
5 2.846 5 .693 1700 45.772 102.390 56.667 7.5 4.409 8.819 "1800 48.438 108.354 60.000 10 5.972 11.945 12.5 7.535 15.071
- STANDARD CALIBRATOR TEST POINTS 15 9.098 18.197 17.5 10.661 21.323 V mph =..BeM +1 20 12.224 24.449 16. 767 22.5 13.787 27.575 25 15.350 30.701 27.5 16.913 33.827 V mps =..BfM... + .44704 30 18.476 36.953 37.5067 32.5 20.039 40.079 35 21.602 43.205 Based on equation I* .5589 (V*1) 37.5 23.165 46.331 where I ls Iha output frequency.
40 24.728 49.457 V Is wind speed mHes per hour.
42.5 26.291 52.583 RPS
- cup revolution par sacond.
45 27.854 55.709 1 MPH
- 0.44707 meters/1ec 47.5 29.417 58.835 50 30.980 61.961 52.5 32.543 65.087 55 34.106 68.212 57.5 35.669 71.338 60 37.232 74.464
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014A-9800 REV. 9/96 3
- 3. 0 OPERATIONAL CHECK-OUT ANO CALIBRATION 3 .1 014A Wind Speed Sensor Check-Out A. Spinning the anemometer cup assembly will produce a series of pulses.
To verify sensor output, monitor this signal with either a plug-in Translator Module, Datalogger or an Ohmmeter. Refer to Frequency vs. Wind Speed Table 3-1. Spin slowly and monitor output signal. A wlndspeed calibrator may be used to check operation at different RPM points.
- 8. Inspect the cup assembly for loose cup arms or other damage. The cup assembly cannot change calibration unless a mechanical part has come loose or has been broken. -
- 4. 0 MAINTENANCE AND TROUBLESHOOTING
- 4. 1 General Maintenance Schedule*
6-12 month Intervals:
A. Inspect sensor for proper operation per Section 3.0.
B. Replace Wind Speed Sensor bearings In extremely adverse environments per 0 Section 4.6.
12-24 month intervals:
A. Replacement of sensor bearings.
24-36 month intervals:
A. Recommended complete factory overhaul of sensor.
- Schedule is based on average to adverse environments.
Table 4-1 TROUBLESHOOTING TABLE Symptom Probable Cause Remedy No sensor output Faulty reed switch Replace reed switch No sensor ouput Faulty bearings Replace bearings No sensor ouput Faulty cable Check Connections 0
014A-9800 REV. 9/96 4
4.3 014A Wind Speed Sensor: 6-12 Month Periodic Service 0
A. At the crossann assembly, disconnect the Sensor Cable from the Sensor (leave the cable secured to the crossarm) and remove the Sensor from the fitting on the crossarm assembly.
B. Loosen the two set screws on the side of the hub and remove the anemometer cup assembly.
- c. Visually inspect the anemometer cups for cracks and breaks and make sure that each is securely attached to the cup assembly hub.
D. Inspect the Sensor for any signs of corrosion and dust buildup.
E. Rotate the Sensor hub assembly to make sure that it turns freely and that the Sensor bearings are not damaged. Make sure that the magnet assembly is not contacting the reed switch. (Ref. Fig. 4.1).
F. A moisture drain vent is located on the base of the Sensor. Make sure that this vent Is clear.
G Re-install Sensor as per installation procedure (Section 2.0) and verify proper operation using procedures In Section 3.0.
4.4 014A Wind Speed Sensor General Assembly (refer to 014A Assembly Drawing)
The following steps cover basic disassembly: 0 A. At the crossarm assembly, disconnect the Sensor Cable from the Sensor (leave the cable secured to the crossarm) and remove the Sensor from the crossarm assembly.
B. Loosen the two set screws and remove the anemometer cup assembly.
C. Remove the three (3) flathead screws at the top of the Sensor and lift out the bearing mount assembly, taking care not to break the wires.
- 4. 5 Reed Switch Replacement Procedure Use the following procedure to replace Sensor Reed Switch:
A. Remove bearing mount assembly as per Section 4.4.
B. Unsolder the leads of the Reed Switch (10) and remove the switch from the two mounting terminals (13).
- c. Solder the new switch onto the sides on the switch mount terminals, taking care not to stress the point where the leads enter the glass reed switch body. (Solder quickly to reduce excess heat to reed switch.) Measure the distance between the bottom of the rotating magnet and the top of the switch envelope, as shown In Figure 4 -1. The spacing should measure between .010 and .020 Inch.
( _)
014A-9800 REV. 9/96 5
D. Monitor the output of the translator module and spin shaft for an upscale indication . If switch seems to falter, adjust switch slightly closer to magnet.
E. If possible, connect the shaft to an 1800 RPM motor, using a flexible coupling and verify an output of 108 mph with a 50% duty cycle.
F. Reassem ble Sensor by reversing procedure.
FIGURE 4-1: REED SWITCH INSTALLATION
.010 '"TO .oto Vll!.W Of' r:zEED ~nt:H i::ru:>,.. l!Crn:)M MCuo.iT ~l"TC:.H A.°= ~.
1
- 4. 6 Bearing Replacem ent Procedures 0 The bearings used in 014A Sensor are speclal stainless steel ball bearings with a protective shield. Bearings are lubricated and sealed. Do not lubricate bearings as the lubricatio n will attract dust and will form an oil/dust glue. Use the following procedure for bearing replacement:
A Remove bearing mount assembly as per Section 4.4.
- 8. Loosen set screws(21 ) in magnet assembly (4), lift shaft (7) and collar (3) up and out of bearing mount (2). Be sure to retain lower spacer (19)
C. Insert a right-angle type of tool, such as an alien wrench into bearing, cock It slightly to one side and remove bearing. Remove both bearings. Clean bearing seats.
D. Install new bearings. Be careful not to introduce dirt particles into bearings.
CLEAN HANDS ONLY! DO NOT ADD LUBRICATION OF ANY KIND.
E. Reassem ble the Sensor in reverse order. Be sure to Include spacers (19) over the bearings when replacing the shaft in the bearing mount. After the magnet assembly (4) has been tightened, a barely perceptible amount of endplay should be felt when the shaft is moved up and down (approximately .004 inch).
) 014A-9800 REV. 9/96 6
- 4. 7 014A Wind Speed Sensor Repair and Recalibration Service
()
This service provided by the factory enables fast, economical service for the user.
This repair and calibration service includes disassembly and detailed electro-nic components. Service includes replacement of bearings regardless of apparent condition. Service also includes replacement of the following items.
A. Shaft B. All set screws.
Service also includes functional test of Sensor. Other components will be replaced as required. Additional charges for additional materials only will be added to the basic service charge. **
Table 4 - 2 REPLACEABLE PARTS UST ITEM# PART# QESCRIPTION 1 101685-2 WSSUPPORT 2 101685-4 BEARING MOUNT
- 3. 101685-7 OOLl.AA
- 4. 101715 MAGNET flSSY 0
5 101812 CUP ASSEMBLY (ALUM) s* 101898 BEARING 7* 860001 SHAFT 9 101812-1 CUP ASSEMBLY, LEXAN 1 0. 2844 SWITCH REED 12 510020 CNJ FOR CON'.JECTOB 1 3. 970062 TERMINAL HH SMITH 19
- 860250 SPACER 21
- 601250 SET SCREW 4-40X 1/8 22 601230 FLAT HD. 4-40X 1/4 SCREW
- Parts Included in 2402 Rebuild Kit l) 014A-9800 REV. 9/96 7
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Precipitation Gauges 0
The accurate measurement of rain and snow precipitation remains one of the most basic elements of meteorology. To enable accurate measurement of precipitation in all environ-ments, Met One Instruments provides a series of instruments incorporating a tipping bucket mechanism. The tipping bucket design allows accurate, repeat-able measurements, requires no regular operator maintenance, and is economical and proven in operation.
Features n Jeweled bearings o Teflon coated bucket o Reed switch o Self emptying o Corrosion resistant materials o Quality construction
) Each model in the series is opti-mized to meet a particular site and sampling requirement.
Operation A dual-chambered t1pp1ng buck- The Model 370 Raingauge et assembly is located below the collection funnel When a pre-cise amount of precipitation has been collected n one side of mostatica ly contra led to melt wear and friction . The funnel the bucket, gravity tips the and measure the water content is powder coated aluminum assembly and activates a reed of snow and frozen rain. but to and has two screens for pre-sw'tch . A momentary electrical avoid evaporative loss. venting leaves and other contact closure through the debris from entering or clog-switch is provided for each Construction ging the gauge. A circular increment of rainfall. The sam- The heavy machined aluminum bubble-level and adjustable ple is discharged through the base provides a stable plat- feet facilitate proper mounting base of the gauge. form for the tipping assembly. of the unit. Major compo-The bucket Is made from stain- nents are finished in cat-For environments that can typi- less steel and 1s Teflon coated alyzed polyurethane paint, cally expect a significant amount to prevent retent on of the sam- with a color and texture cho-of frozen precipitation, 'nternal ple. The bucket pivots are pre- sen to allow the sensor to sensor heaters are available. cision machined and fitted with blend into the environment.
The heating elements are ther- jeweled bearings to reduce 0 Met One Instruments, Inc.
C~rp.ora~e Sales & Service 1600 Washington Blvd , Grants Pass, OR 97526, Phone (541) 471-7111 Fax (541) 471-7116 D1stnbuhon & Service. 3206 Main Street . Suite 106, Rowlett. TX 75088. Phone (972) 412-4747 Fax,(972) 412-4716 http:l/www metone com '
P-labon Gougos - REV 11116194
Specifications Rain Gauges Model No. Funnel Dia. Standard Callb. Optional Callb. 0 310 s* 0.01" 0.2 mm or 0.25 mm 372 8' 05 mm N/A 380 12' 001' 0.2 mm or 0.25 mm 382 12* 01 mm N/A Rain & Snow Gauges Model No. Funnel Dia. Standard Calib. Optlonal Callb. Heater Voltage 375 a* 0.01' 0.2 mm or 0.25 mm 115 VAC 376 8' 0.01' 0.2 mm or 0.25 mm 220VAC 3n 8' 0.5mm N/A 115 VAC 379 a* 0.5mm N/A 220VAC 385 12" 0.01' 0.2 mm or 0.25 mm 115 VAC 386 12" 0.01' 0.2 mm or 0.25 mm 220 VAC 387 12' 0.1 mm N/A 115 VAC 389 12" 0.1 mm N/A 220 VAC Accuracy at 0.5'/hour +/-0.5%
at 1" to 3'/hour +/-1.0%
Switch Type Reed Rating 10 mA, 28 VDC Height 8' Gauges 12* Gauges 18" (46 cm) 20.5' (52 cm) 0 Weight 8' Rain Gauges 6 lbs (2 7 kg)
(not including cabling) 12' Rain Gauges 7.5 lbs (3.4 kg) a* Rain & Snow Gauges 6.5 lbs. (3 kg) 12* Rain & Snow Gauges 11.5 lbs . (5 2 kg)
Shipping Weight a* Rain Gauges 8.5 lbs. (3.9 kg)
(not including cabling) 12" Rain Gauges 10 lbs. (4.5 kg) 8' Rain & Snow Gauges 9 lbs. (4 kg) 12" Rain & Snow Gauges 14 lbs (6.4 kg Rnlsh White Gloss/Biege textured powder coat and clear anodized aluminum Cable Signal #1566-xx Power (as req'd) #2517-xx (xx = length in feet)
Ordering Information Specify Model number. calibration factor, cable length(s), and accessories.
Accessories and Related Products Model 820440 Wind Screen. The improved Alter-design screen Is constructed of 32 free-swinging, separated leaves .
It can greatly improve the accuracy of the precipitation catch by reducing local turbulence.
Model 550500 Evaporation Gauge. This device measures the water level in a standard evaporation pan, and pro-vides an output proportional to that level.
Please contact Met One Instruments for additional information on these products.
Specifications subject to change.
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MODEL 375C 8" RAIN GAUGE OPERATION MANUAL Document No. 375-9801 0
1600 Washington Blvd. Regional Sales & Service Grants Pass, Oregon 97526 3206 Main St., Suite 106 Telephone 503-471-7111 Rowlett, Texas 75088 Facsimile 503-471-7116 Telephone 214-412-4747 Met One Facsimile 214-412-4716 Instruments
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MODEL 375C ELECTRIC RAIN/SNOW SENSOR OPERATION MANUAL 1.0 GENERAL INFORMATION 1 *1 Model 375C Electric Heated Tipping Bucket Rain/Snow Gauge is an accurate, sensitive and low-maintenance sensor designed to measure rainfall on a continuous basis. Water does not collect in the sensor, but is drained each time an internal bucket fills with 0.01 inch of rainfall (standard calibration). At this time, a switch closure pulse is also sent to the translator module for counting. The sensor is calibrated prior to shipment and requires no adjustments after mounting.
1 .2 Sensor Cable is a vinyl-jacketed 2-conductor shielded cable connecting to the sensor via an internal terminal strip. Cable length is designated in -xx feet on each cable part number label.
1 .3 Power Cable is a vinyl-jacketed 3-conductor shielded cable connecting to the sensor heaters with wire nuts In an externally mounted J-Box. Cable length is designated In -
xx feet on each cable part number label.
Table 1-1 Model 375C Rainfall Sensor SoeciflC8tions Orifice a* Diameter Calibration (standard) .01* Rain per switch closure Calibration (options) 0.2mm, 0.25mm Accuracy +/-1% at 1* to 3* per hour at 70° F Switch Type Magnet & Reed Mounting 3 Pads for 114 bolts on 9*21/32* (9.66"}
circle diameter Dimensions 17.314* high, a* diameter not including mounting pads Power Requirement 110VAC, 50/60 Hz, 315W Weight, less cables 7.5 lbs/3.4 kg (10 lbs shipping w/cables) 375C 8194 Page 1
2.0 INSTAUATION
- 2. 1 Choose a site where the height of any nearby trees or other objects above the sensor is no
(,I more than about twice their distance from the sensor. (Sample: 50 ft tree at least 100' away from gauge). A uniform surrounding of objects (such as an orchard) is beneficial as a wind break. Nonuniform surroundings (such as a nearby building) creates turbulence which affects accuracy.
2 .2 Mount the sensor lm£ll on a platform, using the built in level as an aid. The three legs can be adjusted for leveling. Three 114* diameter bolts are used to mount the sensor on a 9-21/32" (9.66") bolt circle.
2.3 Remove shipping restraint (This may be tape, rubber band, or similar item) from sensor bucket and verify that bucket moves freely and that all adjusting screws are tight.
2.4 Connect the signal cable lugs to the terminal strip if not connected already. See diagram.
Polarity is not important. See FIGURE 2*1.
- 2. 5 Connect the power cable to the leads Inside the condulet (see FIGURE 2-2) if not connected already.
- 2. 6 Replace cover on sensor, tightening screws at base.
NOTE: If snowfall is anticipated, remove primary screen from funnel.
- 2. 7 Route signal cable to the translator or datalogger and connecl Refer to the System
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Interconnect Diagram in your system manual for terminal Identification.
- 2. 8 Route the power cable to a 11 OVAC power source protected with a 15A GFI clrcuil Connect (Ref. FIGURE 2*2). This wiring must conform to local and state wiring codes.
If you are not familiar with these codes, an electrical contractor should be used.
Warning:
A* with any AC power wiring, Improper safety procedures can cause fatal Injuries. If you are not quallfled to do this work, call an elactrlcal contractor to do It for you.
375C 8194 Page2
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( BARBIER STAie SIGNAL CABLE 0
AUAC H SIGNAL CABLE LEADS TO SAME TERMINALS AS BEED SWITCH.
(POLARITY NOT IMPORTANT.)
FIG URE 2.-\
375C 8194 Page3
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- 3. o OPERATlONAL CHECK-OUT 3.1 Manually actuate tip bucket mechanism (stop-to-stop) three (3) times. Confirm that 3 tips have registered on the recording equipment If not, refer to Troubleshooting Guide, Section 4-3.
- 4. a MAINTENANCE AND TAOUBl..ESHOOTJNG
- 4. 1 General Maintenance Schedule*:
At six month intervals, perform the following steps:
- a. Clean sensor funnel and buckets.
- b. Do NOT lubricate the pivots, as any lubricant may attract dust and dirt and cause wear of the jewel bearings.
- c. Verify that buckets move freely and that translator card or datalogger registers 0.01* or as calibrated for each bucket tip.
- eased on average to adverse environments.
4.2 Calibratjon. The sensor is factory calibrated; recalibration is not required unless damage has occurred or the adjustment screws have loosened. To check or recalibrate, perform the following steps:
- a. Check to be sure the sensor Is level.
- b. Wet the mechanism and tipping bucket assembly. Using a graduated cylinder, slowly pour the measured quantity of water through the Inner funnel to the tipping bucket, which should then tip. Repeat for the alternate bucket. If both buckets tip when filled with the measured quantity of water, the sensor Is properly calibrated. If they do not, recalibrate as follows:
1* Release the lock nuts on the cup adjustments.
- 2. Move the adjustment screws down to a position that would place the bucket far out of calibration.
- 3. Allow the measured quantity of water to enter the bucket. {Refer to Table 4.1)
- 4. Tum the cup adjustment screw up until the bucket assembly tips. Tighten the lock nut.
- 5. Repeat steps 3 and 4 for the opposite bucket.
- 6. Measure the quantity of water necessary to tip each bucket several times to ensure proper calibration.
- 7. Replace the cover on the gauge.
375C MM Page 5
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Table 4.1 Calibratjon Quantjtjes Tip Calibratjon Water Quantity 0.01 * (standard) 8.24 milliliters 0.2mm 6.49 milliliters 0.25mm 8.11 milliliters 4.3 IAOlB.ESHOOT1NG SVMPTOM pagw:u FCAUSE REMEDY No sensor output Faulty Reed Switch Replace Reed Switch Signal Cable Connection Check Connections Lightning Strike Replace Reed Switch & Diode Debris in Funnel Clean (See 4. 1)
Erroneous Reading Sensor not level Re-level )
Sensor out of Calibration Recalibrate (see 4.2)
Site too near trees or other objects Relocate (See 2.1)
Snow Not Melting Heaters not getting power Check circuit protector (customer provided)
Heater Failure Return unit to factory for repair.
Primary Screen Installed Remove Screen 375C 8194 Page&
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375C 8194 Page7
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4.4 REPLACEABLE PARTS LIST
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Model 375C Raja Gayge Parts List IJl..NQ. Part No. Descrjotjon 1 2545 Assembly, Tip Bucket (.01-, .2mm, .25mm) 2 2492 Pin, Pivot 3 340070 Barrier, Strip - 3 pos.
4 480210 Nut, Crown, Nylon #8-32 5 2598 Screen, Base 6 2503 Screen, Primary Top 7 480510 Clamp, Liquid-Tight 8 2934 Reed Switch Cartridge 9 2936 Adjustable Magnet Bracket 10 2937 Lightning Protection Diode 11 1566 Standard Cable Assembly 11 2745 Cable Assembly (for use with Automet) 12 2504 Screen, Secondary 13 2666 Assembly, Housing/Funnel 8" (115VAC) 14 2516 Foot 4.5 REPAIR AND RECALIBRATION SERVICE This service provided by Met One Instruments enables fast, economical service for the user. This repair and calibration service includes disassembly, inspection, cleaning,
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reassembly and calibration. Components will be replaced as required. Additional charges for additional materials only will be added to the basic service charge.
375C 8194 Page 10 ( I
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Barometric Pressure Sensors 0
Barometric Pressure Sensors convert absolute atmospheric
- pressure into a linear, proportion-al voltage, which may be used in any meteorological program.
Features
- Compact size
- Weatherproof enclosure
- Remote output
- Permanent calibration
- Robust construction These sensors are inherently stable devices that do not require periodic service or 0900 routine recalibration.
091 Operation The enclosure houses a solid- Specificatio ns state pressure transducer, with Performance linearization and amplification Resolution Infinite electronics.
Temp Operating Range -40°c to 55*c Temp Compensated Range -1a 0 c to 65°C The Model 0900 is housed in a Accuracy +/-0.04 in Hg (+/-1.35 mbar) or heavy duty fiberglass enclosure, suitable for harsh and severe +/-0.125% FS environments. A hose barb is Electrical Characteristics provided to enable the connec-tion of a 1/4" sampling tube to Power Requirement 11 mA @ 12 VDC, Typical the outside environment. Sensor Output 0-1 VDC Standard 0-5 VDC Optional The Model 091 is contained Physical Characteristics within a small polycarbonate enclosure, and may be mount- Weight, 0900 2 lbs 5 oz (1.05 Kg) ed outside or inside a building Dimensions, 0900 5.5" x 5" x 7.5" (14x12x19 cm) or other enclosure. Small inlet Weight, 091 8.8 oz. (250 g) holes allow the atmospheric Dimensions, 091 2.13" x 3.2" x 5" (5.4x8.3x13 pressure access to the cm) sensing element.
Ordering Information The standard range of the Specify elevation 0900/ 091 is 26-32 in. Hg,* Specify output voltage suitable for elevations sea Cable #1169-xx (xx= length in feet) level to 1500 ft. Other ranges Specify length in feet are available.
Specifications subject to change wlll1oul notice.
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- convllfsions: 1 fn . Hg 3.3864 kPa, 1 In. Hg = 33 864 mbar. 1 n. Hg .. 25 4 mm/Hg
~ ~~s!.,9.M~~oo !!l~~I~.~~!1 ~~~52!. ~o~(;.1} 411-1111 . ' " (541} 471-7116 Distribution & Service: 3206 Main Street. Suite 106, Rowlett, TX 75088, Phone (972) 412*4747, Fax (972) 412-4716 http;J/www.melone com 09001091 - 7125197
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MODEL091 BAROMETRIC PRESSURE SENSOR OPERATION MANUAL Document No. 091-9800 c
1600 Washington Blvd. Regional Sales & Service Grants Pass, Oregon 97526 3206 Main St., Suite 106 Telephone 541-471-7111 Rowlett, Texas 75088 Facslm~e 541-471-7116 Telephone 972-412-4715 Met One Facslmile 972-412-4716 Instruments
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Baromet ric Pressure Sensor Model 091 Operatio n Manual 1.0 GENERAL INFORMATION 1.1 091 Barometric Pressure Sensor uses an active solid-state device to sense barometric pressure. Self-contained electronics provide a regulated voltage to the solid state sensor and amplification for the signal output.
1.2 A 1169-XX' Sensor Cable ls a 4-conductor shielded, vinyl jacketed cable. Length is given in -XX feet on each cable part number label.
TABLE 1-1 Model 091 Pressyre Sensor Specifications Performan ce Calibrated Range 26-32" (standard)*
Calibrated Operating Range -1 e0 c to +50°c Operating temperature range -40°C to +50°C Resolution Infinite Accuracy +/-0.04 in Hg (+/-1.35 mb) or Accuracy +/-0.125% FS
) Output 0-1V DC (standard)*
"Refer to model number of sensor. Example: /w_- ~- \
Basic Mod # Range ('Hg) Output Voltage (In this example, the sensor ou1put Is 0-1v lor a range ol 26 to 32" Hg)
Electrical Character istics Power Requirement 11ma@12 voe Sensor Output 0-1 VDC Standard o-5 voe Optional Physical Character istics Weight 8.8 oz (250 g)
Dimensions 2.13" x 3.2" x 5" (5.4x8.3xl 3 cm) 091-9800 6197
2.0 INSTALLATION 2.1 Mounting the Sensor. Mount sensor in a convenient location with pressure Inlet port facing downward.
- 2. 2 Installing the Cable. The 1169 Cable Assembly contains four wires. Install the cable into the water-tight gland and connect cable as follows:
SIG = Signal Output (Wht)
COM = Signal Common (Grn)
+12 = +12V Power (Red}
COM = Power Com (Blk) 3.0 OPERATION
- 3. 1 The Barometric Pressure Sensor has been calibrated at the factory, and will not change unless it is damaged. To check for proper operation of the sensor and module, it is advised that the module's output be checked against a local weather service facility.
Exact correlation Is not to be expected, due to geographical and meteorological variations. The sensor reads absolute barometric pressure, whereas local weather services readings are normalized to sea level values.
3.2 One should keep in mind that nominal pressure, at sea level, is 30 inches of mercury and that for every 1 ,000 feet of elevation, the pressure decreases approximately one Inch of mercury. EXAMPLE: A weather station at sea level may use a barometer with a Q
range of 26 to 32 inches of mercury to cover all possible weather conditions. However, a weather station, located 4,000 above sea level, would require a range of 22 to 28 inches of mercury.
MODEL 091 BAROMETRIC PRESSURE SENSOR BANGE SEl..ECDON GVIDE RANGE ("Hgl 0 to 1,500 26/32 1,501 to 3,500 24/30 3,501 to 5,500 22/28 5,501 to 8,000 20/26 8,001 to 10,000 18/24 10,001 to 12,500 16/22 12,501 to 15,500 14/20 15,501 to 19,000 12/18 091-9800 6197
) 3. 3 Each sensor is provided with a calibration data sheet showing transducer outputs at two or more pressure levels. It is important to record these values, as they are required, should it ever be necessary to recalibrate the pressure translator module in the field. If these values are lost, the sensor can be returned to the factory for recalibration.
- 4. O MAINTENANCE AND TROUBLESHOOTING
- 4. 1 General Maintenance Schedule.
A Inspect pressure inlet port occasionally to insure it is free of obstruction. No other periodic maintenance or callbratlon is required.
- 8. inspect sensor for proper operation per Section 3.1.
- 4. 2 091 Pressure Sensor Majntenance. The pressure sensor is an inherently stable device that does not require periodic service or recalibration. Should service or recalibration become necessary, the sensor must be returned to the factory. Always inspect Model 091 Pressure Sensor to make sure that inlet port is clean and free from obstructions.
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Towers and Tripods 0
All meteorological systems need a means of raising the sensors to the required elevation above ground level. The standard reference point is ten meters, or approximately 33 feet , however.
measurements are frequently required at any elevation fram a few feet to several hundred feet Met One Instruments meets this need with a full line of towers, tripods, and instrument I ft systems .
Standard Stacked Towers Standard stacked towers are built on a 12" equilateral triangle of 1" steel tubing with electrically welded, continuous steel "zig-zag" cross bracing. This design results in a structure that is at least one-third stronger than competing towers . All sections are hot-dipped galvanized after fabrication for corrosion protection.
Individual 10-foot sections are light weight (31 pounds}. and are easily con -
nected to each other using double-bolted leg joints. Most installations use guying cables to anchors located at a distance of 80% of the tower he;ght. However, the structure is strong enough to be self-sup-porting using a house bracket. Several base configurations are available, incor-porating a concrete foundation Model 970664 40' guyed tower Three standard 10 foot sections, and one tapered top section of tower are provid -
ed A pier pin is provided which must be located within the foundation. The base of the tower fits over the proiecting pin to locate the tower and prevent the base from moving off the foundation . Complete guying materia s are provided , including a bracket assembly for the tower, guy cables. turnbuckles, clamps , thimbles, etc. Three anchor rods for guy points are provided, each of which requires a poured concrete foundation . Grounding rods are provided for the tower and each guy point Model970668 40'guyedtower This tower 1s identical to Model 970664, except that screw-in anchors are provid-ed for the guy points In place of the poured foundation style.
~ tt~LQl?.~oo L~~t~~.~~.~~~.?..!.~~ t; .1) 471-7111, ' " (5411 *11-1110 Distribution & Service: 3206 Main Street, Suite 106, Rowlelt, TX 75088, Phone (972) 412-4747, Fax (972) 412-4716 http://www.metone.com
Model 970666 30' guyed fold-over tower This tower hinges at approxi-mately 10 feet above ground level, allowing the instrumenta-tion mounted on the tower to be serviced from ground level. One special foldover section, one standard 1O foot section, and a tapered top section are provid-ed. A winch mechanism and cabling are included to activate the tilt mechanism. A base sec-tion is provided to be imbedded in the foundation, requiring an excavation approximately 3' deep. Four screw anchors to provide guy points to the hinge level are included. Complete guying materials, including guy cables, turnbuckles, clamps, thimbles, etc. are provided.
Grounding rods are provided for the tower and each guy point.
Model 970667 40' guyed tower Three standard 10 foot sections.
and one tapered top section of tower are provided. A base sec-tion is provided to be imbedded in the foundation, requiring an excavation approximately 3' deep. Three screw anchors to provide guy points are included Typical Tall Tower and Instrumentation Complete guying materials, including guy cables, turnbuck-les, clamps, thimbles, etc. are Aluminum Towers extension. Steel base suitable provided Grounding rods are Aluminum alloy towers have for imbedding included . Guy provided for the tower and each the advantage of lightness of kit will be provided to suit guy point. weight which makes reloca- requirements.
tion from site to site easier.
Model 970665 40' bracketed They are also often used in Model 305831 35 foot tele-tower mob.le operations. such as on scoping aluminum tower Three standard 10 foot sections, van or trailer mounted moni- A light weight tower composed and one tapered top section of toring stations. of 3 nested aluminum sections tower are provided . A base sec- An integrated winch is used to tion is provided to be imbedded Model 970894 33 Foot alu- raise and lower the sections.
in the foundation, requiring an minum tower, guys suggested Guy wires, turnbuckles. cable excavation approximately 3' but not required clamps, etc. are furnished to deep. Brackets are provided to Tapered top section with 11 " guy each section, and duckbill support the tower to an adjacent leg width, straight center sec- ground anchors are provided.
building, eliminating the need tion. 11" width, Lower section The tower is crated for shi~
for guy cables and anchors. with 14" leg width {reducing to ment. An optional power ~\
Grounding rod is provided for 11 "). Height to make 10 is available in either 110 V}f._,
the tower. meters is provided by mast or 12 vdc.
Tower Options
- 5284 Tower grounding system The Model 5284 includes all materials required to provide lightning protection to the tower. An air terminal with 5' extension rod, braided 2-0 copper cable, ground rod, and all clamps are provided
- 2420 Instrument boom The Model 2420 includes two special cross fittings and a five-foot long, 3/4" IPS alu-minum boom. The Model 2420 allows the boom to mount to the side of any tower having a leg diameter of 1.25 inches (standard stacked towers). I t t L'ft 1 C
- Aluminum construction for car- ns rumen arnage rosion resistance.
Model 173/175 Instrument Lifts Major structural members are Model 191 Crossarm To avoid the difficulty and dan- hot-dipped galvanized steel. A
'\ssembly ger of tower climbing, the three-foot instrument boom is The primary mounting device instrument lift is used to return standard with all instrument lift for meteorological sensors. sensors to ground level. systems.
Includes cross fitting to mount Service to the system is easily to vertical or horizontal 3/4" accomplished without the The Model 173 provides a IPS pipe, such as the #2420 expense and delay of contract- continuous loop drive cable to Instrument boom. ing a professional climber. positively raise and lower an instrument carriage to a maxi-mum height of 100 feet (30 meters). A powered drive winch is an available option.
The Model 175 is a light duty system utilizing a hand-crank winch. The maximum recom-mended height for this system is 50 feet (15 meters).
Boom and Crossarm Assemblies
Tripod Towers Tripod towers provide an economical. quick, and easy solution for sensor mounting. We offer a vari*
ety of tripods to meet virtually any meteorological system requirement.
Model 2150/2151 Tripods Lightweight and sturdy, these tripods are construct-ed of galvanized steel tubing, and come fully assembled. Installation is accomplished by simply opening the legs and installing the mast. Each leg is furnished with a swiveling foot, enabling the tri-pod to be installed either on a flat surface or a pitched roof. A complete guying kit. including ground stakes, is included. The1-1/4" OD aluminum mast includes a reducer to allow use of an optional Model 191 Crossarm assembly.
Specifications Model Height to top of mast Weight (approx.)
2150 11 Ft. 13 lbs.
2151 14Ft. 18 lbs.
Model 6168/6230 Tripods "Heavy-duty, self-supporting and extremely robust" describe these tripod towers. The unique design features self-contained guying and a wide footprint to provide strength and stability even in winds as high as 100 mph. Constructed of heavy aluminum tubing, the design features a fold-over mast to ease installation and facilitate servicing of the installed equipment. Heavy galvanized steel "feet and ankles* contribute to stability and are adjustab!e to conform to terrain variations. The feet can be staked to the ground for added stability. The strength, stability, and economy of these tripods make them a viable alternative to traditional instru-ment towers.
Specifications Model Height to top of mast Weight (approx.}
6168 20 Ft. (6 M) 170#
6230 33 Ft. (10 M) 205# Model 6230 Tower Erection and Turnkey Systems Frequently the customer will find it expeditious and economical for a single contractor to have com plete site and system responsibility. Unfortunately it is not easy to find a company that knows both sensors and pouring concrete. Met One Instruments has this knowledge and the experience gained from supplying numerous turnkey systems throughout the country and overseas Met One Instruments' project engineers are conversant in all phases of construction associated with meteoro _.,,1 logical sites. Consult our sales department for budgetary estimates or firm quotations
0 MODEL 5284 TOWER GROUNDING SYSTEM OPERATION MANUAL DOCUMENT 5284-9800 0
1600 Washington Blvd. Regional Sales & Service Grants Pass, Oregon 97526 3206 Main St., Suite 106 Telephone 541-471-7111 Rowlett, Texas 75088 Facsimile 541-471-7116 Telephone 972-412-4715
()
Met One Facsimile 972-412-4716 Instruments
0 0
0
5284 Tower Lightning Rod And Grounding System 0
Introduction High voltage electrical surges caused by lightning are a common source of failure of both sensors and associated electronics. In addition to the protection devices built in to our sensors, Met One provides has provided a tower ground system. The grounding system and lightning rod will increase the likelihood that the system will survive a lightning strike. However a direct strike, no matter how well protected, will likely result in component or system failure.
The part number 5284 Tower Lightning Rod And Grounding System provides an air terminal at the top of the tower, that is connected to earth ground using a heavy gauge copper wire. It provides a direct path to ground from electrical energy caused by a strike or by the EMF of a nearby strike. The system provides a 60 degree cone of protection from the apex of the air terminal to the ground.
Installation Installation of the various components is very easy. The basic idea is to have the vertical air tenninal at the top of the tower mounted using the two clamps and cable provided. At the base of the tower a ground rod is driven into the ground and the opposite end of the cable is attached to this point. If a base grounding kit was provided with the tower, add the additional ground rod to the base grounding kit to improve the ground resistance. See Figures 1 and 2 for basic details of the installation.
If the tower base grounding kit was supplied with the tower, be sure that the heavy gauge braided copper wire is used for attachment to the ground rod. The small #4 cables should be used for the c
connection from the tower legs to the other ground rods. For maximum effectiveness of the grounding system, the ground resistance to the rod should be less than 10 ohms.
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Parts List GROUND ROD 1) 2)
Sectional lightning rod (TL 5855)
Air Terminal { 665)
- 3) Clamp {802)
- 4) Copper Cable (505)
- 5) Ground Clamp {493U
- 6) a ft Ground Rod (TL588)
- 7) Copper ground wire from translator or data logger ground connection FIGURE #1 Tower Lightning Rod and Grounding System
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APPLICATION NO. ZS, 45, If 55 TOWERS WITH FLAT BASE
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~ING~. 040 0-1
Relative Humidity Sensor The Model 083C sensor probe represents sensitivity, accura-cy, linearity and stability not encountered with conventional relative humidity sensors. It is extremely well suited for mete-orological, industrial, laborato-ry and other demanding appli-cations.
Features All solid state construction Fast response of less than The Model 083C Relative Humidity Sensor is five seconds extremely well suited for meteorological, industrial, Low power consumption laboratory and other demanding applications.
of 4 ma at 12 voe Easily cleaned using distilled water is essentially linear, with small perature compensation is not 0-1 V output for 0-100% RH hysteresis, and negligible tem- required for most applications.
Will operate from a 12 VDC perature dependence. The probe body is water tight battery and made from corrosion The model 083C RH sensor Construction resistant aluminum. Immersion The sensor is mounted in a in water does not affect the can also be supplied with a calibration of the sensor.
( Temperature Sensor mounted in it and used with various radi-small probe which contains all the electronics necessary to The polymer material is resis-ation shields for reliable, accu- provide an output for indicat-ing or recording humidity. tant to most chemicals.
rate measurements.
Since the capacitance change The calibration of the sensor is not affected by liquid.
Operation of the sensor is sensitive only to the ambient humidity, tern-The model 083C Relative Humidity Sensor is based upon the capacitance change of a polymer thin film capaci- Specifications tor. A one-micron thick dielec- Sensing Element: Thin film capacitor tric polymer layer absorbs Range: 0-100% Relative Humidity water molecules through a thin Temperature Range: -20°c to +60°C metal electrode and causes Response Time: Less than 15 seconds at 68°F capacitance change propor- of Final (with filter) tional to relative humidity. The Accuracy: 0-10% +/-3%
thin polymer layer reacts very 10-90% +/-2%
fast, and therefore, the 90-100% +/-3%
response time is very short- Temperature Coefficient: 0.04% RHl°C less than five seconds to 90% Output: 0-1.00 VDC - Standard of the final value of relative Input Power: 4 MA at 12 VDC Battery humidity. The sensor responds Dimensions: Diameter 0.75" Length 7.5" to the full range from 0-100% Weight: 2.5 oz.
relative humidity. Its response Subject lo change without notice.
Met One Instruments, Inc.
Corporate Sales & Service: 1600 Washington Blvd
- Grants Pass. OR 97526, Phone (541) 471-7111. Fax (541) 471-7116 Distribution & Service: 3206 Main Street, Suite 106. Rowlett. TX 75088. Phone (972) 412-4747 Fax (972) 412-4716 http*f/www.metone.com 083C REV 1217193
Ordering Information
()
-0 Temperature Sensor not included
-1 -50 to +50"C, 060 type Temperature Sensor included 083C-X-V
- 1 With connector for direct use with Model 071 Vane Radiation Shield
- 35 With connector for direct use with Model 0738 Radiation Shield or Model 0758 Solar Powered Radiation Shield
-6 With 6" Signal Cable for direct use with Model 0768 Motor Aspirated Radiation Shield
(
MODEL08 3C RELATIVE HUMIDITYITEMPERATURE SENSOR OPERATION MANUAL 1600 Washington Blvd. Regional Sales & Service Grants Pass, Oregon 97526 3206 Main St., Suite 106 Telephone 541-471-7111 Rowlett, Texas 75088 Facsimile 541-471-7116 Telephone 972-412-4715 Met One 0
Facsimile 972-412-4716 Instruments
0 0
083C RELATIVE HUMIDllYITEMPERATURE SENSOR OPERATION MANUAL 1.0 GENERAL INFORMATION 1.1 The 083C Sensor contains an extremely accurate and sensitive relative humidity sensor which responds to the full range of 0*100% humidity. Response is linear with small hysteresis and negligible temperature dependence. The sensor is designed to be housed in a radiation shield when used outdoors. Certain models also contain a high-accuracy linearized air temperature sensor, permitting simultaneous measurement of relative humidity and temperature.
1.2 The 083C Sensor model number describes the sensor options as follows:
083C
- X
- Y Xis the temperature option:
0 = no temperature sensor 1 = -50 to +50°C temperature sensor Other temperature options are available.
Y is 0
the radiation shield compatibility option:
Radiation Shield Signal Cable
- 1 071 1 8 7 3 -ZZ (ZZ =cable length in feet)
- 6 076 2144-ZZ
- 6 077 2408-ZZ
-3 5 0738 2348-ZZ
-3 5 0758 2348-ZZ 1.3 The Sensor Cable is vinyl-jacketed and shielded. Cable length is given in feet on each cable part number. The cable part number depends on which radiation shield the sensor is mounted in. The 077 Radiation Shield has a screw type terminal strip to accept wire leads from the 2408 cable. All other Radiation Shields and cables have Mil Spec screw-on or twist-on cable connectors.
The 083C*X-6 sensor mounts in either a 0768 Radiation Shield, with a 2144*ZZ signal cable or a 077 Radiation Shield with a 2408-ZZ signal cable.
083C*9800 10/94 Page 1
Table 1.1 Model 083C Relative Humidity Sensor Specifications 0
Sensing Element Thin*film capacitor Range 0*100% RH Temperature Range Response Time 15 seconds at 68°F 90% of final RH value Accuracy Better than +/-3% between 1Oo/o and 90%
Hysteresis For 0% to 100% to 0% excursion less than
+/-1 o/o Temperature Coefficient +/-0.04% per , °C Output O
- 1V at tun scale (standard}
Input Power 12V DC +/- 2V, 12 ma Table 1.2 Model 083C*1 AH/Temp Sensor Specifications 0
Range .50° to +50°C {standard range)
Linearity +/-0.15°C Accuracy Time Constant 10 sec.
2.0 INSTALLATION 2.1 If sensor comes mounted in a radiation shield, refer to radiation shield manual section for mounting details. Sensors not furnished in a radiation shield should be mounted In a representative location having good air flow and shaded from sunlight or other heat radiation sources that would affect measurement of relative humidity or temperature.
083C-9800 10/94
)
Page2
MODEL OJ6B 0
MODE.L 07.l-MODEL 0]3 B IYPlCAL 083C SENSOR \NSTALLAT1~6 lN 5rANDARD RADJATIO~ 5~\ELD6 083C*980 0 1Q.194 Page3
3.0 OPERATIONAL CHECK-OUT AND CALIBRATION 3.1 Relatjve Humjdjty Measyrement 0
3.2 Relative Humidity Sensor Check-out
- 1. To verify correct wiring and as a rough test of sensor operation, blow on the sensor. The relative humidity will rise to a higher level.
- 2. The Relative Humidity Sensor has been calibrated at the factory and will not change unless it is damaged. To check for proper operation of the sensor it is advised that the output signal be checked against a local weather service facility. Exact correlation is not to be expected due to atmospheric and geographical variations.
3.3 Temperature Sensor
- 1. Compare actual readings with precision mercury thermometer. As an alternative, measure sensor resistance with a Lo Current Digital Ohm Meter and compare readings of temperature vs resistance. See Table 3.1.
4.0 MAINTENANCE AND TROUBLE SHOOTING 4.1 General Maintenance Schedule*
6 - 12 Month Intervals:
0 A. Inspect sensors for proper operation per Section 3.0.
B. Clean Relative Humidity sensor element per Section 4.2A.
- schedule is based on average to adyerse environments.
4.2 083 Relative Humjdjtv Sensor Maintenance and Calibration Warning: The sensor can be miscalibrated or permanently damaged through improper acts. Do not attempt a repair or calibration if you are unsure of the procedure. Do not touch if you do not know how.
This instrument should operate for an extended period of time with a minimum of care or maintenance.
If parts or maintenance assistance are required, contact Met One Instruments. Obtain shipping instructions before returning any unit.
083C-9800 i 0/94 Page4
)
A. Maintenance 0 Cleanjng the Sensor Element. Unscrew the filter. Dust and other particles may be removed by gently blowing on the sensor chip. DO NOT USE COMPRESSED AIR.
After dusting, the sensor element may be wiped clean with a soft brush dipped in distilled water. po NOT USE DETERGENTS. DO NOT APPLY POWER TO THE SENSOR WHEN CLEANING, and do not reconnect power to the sensor until the element has dried.
CAUTION: NEVER TOUCH THE SENSOR CHIP WITH BARE HANDS
- 1. The life of the sensor is related to the environment in which it operates.
In a pure air and water vapor surrounding, the sensor element will have an indefinite life. The presence of chemical pollutants in the environment may corrode the materials of the sensor chip. The polymer material is resistant to most chemical attacks, but the metal electrodes, are sensitive to corrosion effects, particularly when a DC voltage is applied to the sensor. The most harmful pollutant has been sulphur dioxide absorption in small soot particles. When such particles fall on the thin metal electrode, they may, if water condensation is present, form traces of sulphuric acid to corrode the surface of the sensor. For these reasons, a careful cleaning as described in the preceding paragraph is recommended whenever the sensor has been exposed to corrosive pollutants. Also, a periodic cleaning every 0
two weeks with an atomizer of distilled water, thoroughly washing the chip clean, may remove harmful particles before they can damage the sensor. Be sure that no power is applied when washing the chip and that power remains off until after the chip has dried.
- 2. Replacement of Sensor Element. If the sensor element has been damaged, it can be easily replaced. Disconnect power to the probe. Unscrew the filter. Un~solder the old chip and solder a new one in its place. The sensor chip is very delicate, so observe the following precautions. JlQ...
NOT TOUCH THE CHIP WITH BABE HANDS. Handle the chip only by gripping its lead with pliers. When soldering, hold the lead with the pliers to prevent the heat from the soldering operation from damaging the chip. Do not bump the chip when reinstating the protective grid.
- 3. After replacement of the sensor element, the humidity probe must be recalibrated.
OB3C9BOO 10/94 Page5
8.
0 Humjditv Probe Calibration.
1* Before attempting to recalibrate the probe, make sure that the translator module containing the signal conditioning electronics is still properly calibrated. If 0% and 100% do not produce corresponding readings on the indicator, recalibrate the translator module.
- 2. The calibration method described in this instruction manual Is based on the constant water vapor pressure over saturated salt solutions and constant temperature. Materials used for the calibration are Lithium Chloride {UCI) and Sodium Chloride (NaCl). The former creates a humidity of approximately 13% and the latter approximately 76% in 68°F {20°C) ambient temperature. Both of these chemical agents are available from chemical suppliers. To guarantee accurate calibration, the salts must be of high purity.
TEST EQUIPMENT REQUIRED:
2 Calibration Bottles: HM*111*CG*L and HM-111-CB-N Lithium Chloride Salts, Reagent Grade 1 Sodium Chloride, Reagent Grade 1 Thermometer to measure ambient temperature Distilled water
- 3. Preparations for Calibratjon Refer to instructions with the calibration bottles for mixing the solutions.
0 The calibration bottles can be used for up to one year without changing fresh chemicals. The bottles should be stored in a place with constant temperature, so as to have them ready for use with just a short preparation time. Do not shake the bottle with salt solution before use. Care should be taken to see that there are no droplets of salt solution inside the mouth piece of the bottle. This might affect the accuracy of the calibration. Do not get any salt solution on the sensor element directly.
083C-9BOO 10/94 Pages
TABLE 4-1 0 Calibration Tables LITHIUM CHLORIDE Ambient Temperature 0 c 10 15 20 25 30 35 40 Calibration Value % RH 14.3 13.8 13.4 13.0 12.8 12.7 12.6 SODIUM CHLORIDE Ambient Temperature °C 10 15 20 25 30 35 40 Calibration Value o/o RH 75.2 75.3 75.5 75.8 75.6 75.5 75.4 C. CALIBRATION FOR LOW HUMIDITY (13% RH)
- 1. Unscrew the filter. Do not bump the sensor element while removing the grid.
- 2. Pull the rubber plug out of the lithium chloride (LiCI) bottle, and 0
push the sensor probe in its place in the cork's sleeve. The sleeve is fitted with a safety flange and prohibits the probe from falling through.
- 3. Read the ambient room temperature.
- 4. Note the humidity percentage from the lithium chloride calibration table, which corresponds to the temperature in question.
- 5. After 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, read the humidity value, If the reading differs from the table value, adjust 815, zero adjust.
- 6. After use, close the bottle tightly with the rubber plug.
D. CALIBRATION FOR HIGH HUMIDITY (76%)
Repeat the calibration procedure as described above, but now using the sodium chloride. Adjust R18 (span adjustment) if necessary.
E. Repeat steps C and D until no further adjustments are required.
) OB3C-9BOO 10/94 Page7
MODEL 510070 RELATIVE HUMIDITY CALIBRATOR ()
1 .0 GENERAL INFORMATION 1 *1 Suitable for all probes. Calibration by means of lithium chloride and sodium chloride saturated salt solutions. Bottles for salt solutions in metal box providing stable temperature. Due to the minimal space of air above the salt solution no ventilation is needed. Solid construction. Humidity and Temperature scale for each salt solution printed on the box lid. A thermometer situated between the salt bottles in the box provides a very reliable calibration.
figure 5 Calibrato r before setting up 083C-9800 10/94 Pages
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083C-9800 1Q/94
RESISTANCE TABLI: 3.1 MODELS 060A-4,063-2
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~4 2716. 85 17995.782 53 1 61.135 4448.26 54 1844.g20 22~~~.770 1121g.~e4 5
- 655 1659
- 68 55 1826. 05 44~~,.734
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~~62.8~0 62 i1g1.100 i~ 45.7 5 1~871.569 1 451.151 63 16 9.985 ~E~i:~§5 14 2~2e.g20 12052.667 64 lg1~.01g 15 2 11. 05 11673. 20 65 1 ~ .75 34sg5.3~~
1.0 16 2494.~90 16§~2.266 66 12 8.640 17 2477. 75 1 8.598 67 1 1.525 j~~~:~~~
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- 85 69 15 7.295 j~l§:ga5 24~~-330 10028.778 70 1570.180
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- 15 9742.611 ' 71 1553.065
~082.902 017.610 22 23~1.700 §46~-~64 72 1~3~.950 2953.661 23 23 4.585 20
- 81 73 1 1 . 835 2891.014 24 ~~57.47g 8953.870 74 15g1.120 ~829.630 25 40.35 711.894 75 14 4.605 769.471 26 2323.240 8479.365 76 1467. 490 2110.sog 27 2306.125 8255.74 77 1450.375 2652.68
( 28 29 2289.010 2271. 895 8040.~19 78~3. 34 78 79 1433.260 1416.145 ~~~8:~~~
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2132.090 6571.832 86
~~ 21 4.975 6414.798 87 12~~-340 12 .225
~179.112 131.1 1 38 2117.860 6262.731 88 1262.110
~8~~: ~9 0
39 2100.745 6115.400 89 1244.995 40 ~083.630 5§72.506 90 1227.880 1992.302 066.515 91 1210.765 204f .4ft0 5 ~4. 85 1947.708 1~44 203 .2 5 201 .170
~E6§:~~3 5442.5~0
§~
94 11,3.~30 11 6. 5 115~.420 l~~8:i~~
1818.181 45 199 .055 5319.5 5 95 114 .305 1776.442 46 1980.940 559j.915 47 1963.825 5 8
- 617 §~ 112~.190 110 .075 17~5.392 16 5.013 48 1946.710 98 1090.B60 lg55.290 49 1929 .595 44B7g.4~5 6 *4 2 99 1073. 45 1 16.206 50 1912.480 475 .275 100 1056.730 1577.746
- VALUE WITH A 3200 OHM RESISTOR IN PARALLEL WITH THE SENSOR RANGE 0 TO 100 DEGREE C THERMISTOR BEAD 44201 RNOM = (-17.115)T+27 68.23 WHERE T = TEMPERATURE IN DEGREE CENTIGRADE
RESJ:STANCZ TABLJ: 3.1 MODELS 060A-4,063-2 nMf ~ f. BNOM* ru:AI& ~~f. BNOM* ~
32 2768.224 20516.001 84 2273.808 7856.023 _)
33 2758.716 20005.011 85 2264.300 7743.679 34 2749.208 19515.576 86 2254.792 7633.594 21~g.10~ 19046.361 87
~~ 27 .19 18596.138 ea 224~.284 223 .776 7525.7g~
7419.9 2720.684 18163.777 89 2226.268
~~ 2711.176 17748.235 90 2216.760
- 7~16.24~
7 14.54 39 270~.6~8 17348.~~o 91 2231.252 7114.803 40 269 .1 0 16963. 1 92 21 7.744 7016.951 41 ~~~2.652 93 42 3.144 i~~j~:a~~ 94 ~r~R:~~g ~§20.937 26.712 43 ~663.6~6 1~8!1.512. 95 2169.22~ 6734.2~~
44 654.1 8 1 5 8.976 96 2159.71 6643.4 45 2644.620 152~7.826 2150.204 6554.276 46 2635.112 149 7.487 ~~ 2140.696 6466. 725 47 2625.604 14627.422 99 2131.g88 6380.731 48 2616.096 14337.129 100 2121. 80 6296.253
~8 ~~B~:S98 149~6.139 131 2162-~72 6213.t~3 13 4.011 1 2 21 2. 64 6131. 1 51 ~!~7.572 1~~20.333 183 52 8. 064 1 64.717 1 4 ~8B~:~~g 56gs1.~~o
- 72. 4 53 2568.55B 13016. 7~8 105 2314.14~ 589~.269 54 2559.04 12776.2 5 106 2 64.63 581 .102 55 2549.54~ 12542.705 107 2055.124 5744.200 56 2540.03 12315.904 108 2045.616 5670.532 57 58 2530.524 2521.016 i2g~5.545 11 1.357
. 109 110 2036.108 2026.600 55~8.067 55 6.777 59 2511.588 11673.085 11~ 2017.092 54ij6.633 60 2502.0 11470.487 11 2007.584 53 7.607 24§2.492 11273.335 113 1998.076 5319.673
~~ 24 2.984 11081.411 114 1988.568 5252.806 63 2473.47g 10894.510 115 1979.060 5186.981 64 65 2463.96
~454.46~
10712. 439.
1033~.0ll 116 117 1969.552 1960.044 5122.172 5058.358 )
66 444.95 10 6
- 052 *118 1950.536 4995.514 2435.414
~~ 2425.9 6 101~d*d~4 100
- 0 !~6 1941.0~8 1931.5 0 4~33.620 4 72.654 69 241~.428 ~868.359 121 1922.012 4812.59~
70 240
- 92 711.686 122 1912.504 4753.42 71 ~~97.412 9558.726 123 1902.996 46j5.110 72 87.904 9409.347 124 1893.4~8 46 7.6 2 73 2~78.396 9263.42~ 1~5 1883.9 0 45~1.037 74 2 68.888 9120.84 1 6 1874.4 2 45 5.223 75 2359.380 8981.485 127 1864.964 4470.205 76 2349.872 8845.245 128 1855.456 4415.965 77 a1~2.0 9 128 1845.948 4362.4g7 78 ~340.~6~
330. 5 5 1.7 0 7 13 1836.440 4309.7 4 79 8454.216 1826.932. 4257.752 80 ~~H:U~ H0 27.777 8~29.454 1.335 1~1 1 2 1817.424 4206.464 4155.879 H~ ~ g~:i~4 11~34 10g1.9A~
17 8.4 4105.97 83 2283.316 7970.698 135 1788.900 4056.750
- VALUE WITH A 3200 OHM RESISTOR IN PARALLEL WITH THE SENSOR RANGE 32 TO 212 DEGREE FARENHEIT THERMISTOR BEAD 44201 RNOM = (-9.508)T+3072.48 WHERE T ~ TEMPERATURE IN DEGREE FARENHEIT
RESISTANCE TABLE 3.1 MODELS 060A-4,063-2 lll:lf. ~ [. BHCM* ~ :m:£ !ml[. RNOM* ~
136 1779.392 4008.181 178 1380.056 2426.547 137 17~8-~84 11g 1370.548 138 17
- 76 396~*§5ff 391
- 6 18 1361.040 ~jg~ J2~
138 1750.~~8 ~R~8:~j~ ~~39.~23 14 1741. 111 1 2 11~5i.5~2
- 42. 4 11. 74 14~ 17~1. 852 ~774.774 1 3 1~32.513 2283.!13 14 17 2.344 729.894 184 1 23.00 2255. 37 143 1313.500 144 l~6~:~~B ~~85.~89
- 41. 46 195 1 6 1303.992
~228.0~l 200.8 1 145 16fi3-~29 146 16 4. 1 3~~t88B lB~ 11~~4.4~4 4.9 6
~173.872 147.191 147 1614.aoa ~513.891 189 1275.4~8 ~520.113 148 1665.29 472.296 190 1265.9 0 94.61 149 1655.190 3431.214 1256.452 1l~l2 2 4 .o 5 150 1646.2 0 3390.634 1246.944 286~.7g5 151 16~6. 772 ~~58.548 193 1~37.43B 2017.664 152 16 7.264 1
- 947 194 l 27.92 1992.sBe 153 1617.756 3271.821 195 i~ 9.420 1§67.5 4 154 1608.248 3233.163. 196 1 0 .912 1 42.917 155 15§8.740 197 lla9.404 1918.475 156 15 9.232 ~r§i:~fa 198 11 9.896 1894.264 1~7 1~1g.124 311j.911 ~99 1180.398 1870.281 1 8 1 7
- 216 308 .041 00 1170.8 1846.523 158 1560.708 ~846.599 . 201 ll61.a12 1~22.9ag 16 1551.200 10.577 202 1151. 64 1 99.66 161 22§j4-~69 1g4~.692 ~03 ll~~*fi56 1776.56~
162 l 3 .184 9. 66 04 11
- 48 1753. 67 163 ~~04. 962 11~2~.67g ~OS 112~*i40 1730.9~5 164 l .16 70.551 06 111
- 32 1708.5 1 0 165 166 167 1503.660 1494.152 1484.644 2~36.526 2 02.880 2 69. 606 2g1 2 8 208 1104.324 1094.816 1085.308 1686.2i2 1664.1 3 168 1475.136 2736.700 21 1075.800 1~42.3~~
1 ~0.6 169 1465.628 2704.154 21~ 186~.292 15 9.157 170 1456.120 2671.964 21 1 5
- 784 1577.867 171 1446.662 2640.122 172 1437.1 4 2608.624 173 174 175 8
1421. a6 1418. 8 ~g~i:a~a 14oe.ge~ 251g.1~6 176 1399. 7 248 .9 7 177 1389.564 2456.096
- VALUE WITH A 3200 OHM RESISTOR IN PARALLEL WITH THE SENSOR RANGE 32 TO 212 DEGREE FARENHEIT THERMISTOR BEAD 44201 RNOM = (-9.508)T+307 2.48 WHERE T =TEMPERATURE IN DEGREE FARENHEIT
TABLE 3.1b MODELS 06DA-2, 063-1 , 064-2
~~~ BtlQM* ~ lll:2 0£.G. c. BNOM* ~
0
-so 20156 .450 20027 .287 1sa10 1.ao6 15056 0. 66 ~ 1~569.137 1 439.9 74
~2887.53~
2138. 9
-49 3
-48 19899 .124 14355 5.423 13310.81~ 31410.~34
-47 1976 .961 13709 3.261 4 13181 . 64 30700 . 68
-4g
-4 f~~t8:l~~ 13l~g3.s4g 125 4.17 i7 12 9 -48~
130~~
- 32 2J3ooe
.6~a 334.S
-44 19~~~-47~ 1204g g.331 127 94 .1§9 28677 .434
-43 19 .30 1155 .174 8 12664 .9 6 28036.~40
-42 j.146 11101 9.926 . AS
-41 1§§2 1 9
- 983 10685 .059 18 4 6..83~
11~5~5 67 ~1411 6801.
-40 10§89 4.645 11 12277 .507 262~S.6j§ 187 s. 57 188~4-~20 12 256 4.1
-39 9 165.8 26 12148 .344 1860 6.4j4 13 12219 .181 25056 .188 I
95651.~71
--~87 18477 .3 1 92333 . 14 14 15 11 90 .018 11760 .855 24501 .325
-~6 1834~ .168 891~5.637 2~959.lg4
- 5 1821
- 005 862 4.021 16 11631 . 692 2 429.0
-~4 1~089.84~ 83405 .623 17 11502.~29 22910.8~
- 3 11789~0.6 7 80728 .891 18 11373 . 66 22404 .1
-32 1.516 19 11244 .203
-31 177 2.353 781~3.405 757 9.744 20 11115 .040 14 3.-~63
~19~8 0 17573.1~~ 73449 .368 21 10985 .877 2394~.s91
- ~g 17444 .0 71244 .51 22 10856 .714 2 48 .8 8 17314 .884 69138 .103 . 23 18727.~51 2002~-~~l
-2~
-2 17185 .7 1 67123 .71 24 l 598. 88 1958
- 6 170~6-~38 65195 .417 25 1046g .225 19146.8~4
-~6
- 5 169 7. 75 63347 .824 26 1034 .062 1871 9.l 9
-24 16798 .212 61575 .968 27 10210 .899 18~00.0jS
-23 16669 .049 59875 .286 28 10081 .736 17 89.3 6 16539 .886 58241 .574 29 9952. 573 17486 .649
-22
-21 16410 .723 56670 .953 30 31 9823. 410 9694. 247 17091 .796 )
-20 16281 .560 55159 .837 16704.55~
16324 .70
-19 16152 .397 53704 .907 32 9565. 084
-18 160§3 .g34 52303 .087 33 9435. 921 15952 .028
-17 158 4. 71 50951 .521 34 9306. 758 15586 .336
-16 1~7~4.908 49647 .554 35 9177. 595 15227 .430
-15 1 6 5.745 48388 .715 36 9048. 432 14875 .121
-14 15506 .582 47172 .702 37 8919. 269 14529 .231
-13 15377 .419 45997 .365 38 8790. 106 14189 .584
-12 1s243 .2ss 44860.69~
~8 80g~o.
946
- 1. 78 1lj8S~
.015 52 . 36
-11 1511 .093 43760 .82 14989.~30 42695 .980 41 8402. 617 13206 .46a
-~B 14860 . 67 41664 .524 42 8273. 454 12890 .17
-8 147d l.604 40664 .9ge 43 8143.2~1 1251J*~5~
-7 146 2.441 39695 .6 1 44 801
- l 8. 1227 . 5
-6 14473 .278 ~8153.411 45 7885. 965 1197~.536
-s
-4 14344 .115 14214.9~2 784
- 011 3~957.076 46 47 7756. 802 7627. 639 1167 .278 11387 .94B
-3 14085 .7 9 3 096.5 29 48 7498. 476 11102 .42
-2 13956 .626 35260 .295 7369. 313 10821 . 59~
-1 13827 .463 34447 .357 ~8 7240. 150 10545 .33 0 13698 .300 33656 .757
- VALUE WITH 23.lK RESISTOR IN PARALLEL WITH SENSOR RANGE -so TO +soc44 ~R12-58 TO +122F THERMISTOR BEAD RNOM=(-129.163)T + 13698.3 WHERE T =TEMPERATURE IN DEGREE.CENTEGRADE For RCAL: Where: Tc = Temp (deg C Tc= ((((R+ -1) + (23100 -1)) 13698 .3)/-12 9.163 RT = RCAL Rt* ((((-1 29.163 Tc) + 13698 .3)-1) - (23100 )-1)-1
TABLZ 3.lB MODELS 060A-2, 063-1, 064-2
~ tWi f: BtlQM* ~ llM1?. om E. RNOM* ~
-58
-57 20156.~06 20084. 49 1~8178.3,6 1 3864.4 3 !3 15§~2.743 15 0.986 50247.~45 5 511. 90
-~6
- 5
-~4 2gg12.e~2 1 41.1 1~869.37 i 14 8 4.50§68 14§7~1.
142072.~27 4
5 1~779.229 1 707.472 1563~.715 49789.86 4 49082.34 4 48388.4~8
- 3 1 797. 621 138483. 13 6 1556 .958 47707.7 6
-52 1~5047.152 7 1~4~2.201 i 654.1 ~
11~12s.0g 47g~9.86 mauai
-51 1 1753.909 8 1 4 0.444 46 4.48
-5g l~!~g:~§g 1~~~~~:~~3 16 l~~~~:~~6
-4 12264~.729 11 1s2g3.11 3
-4~
-4 l§~~~:8~f 11984 .038 12 13 151 .416 44499*8~
438 1.
-4g 111!51.g 20 1sg6~.6S ~ 43283.1~1
-4 l~~~~:~t5 114 54. 30 14 14 8
- 90 42695.7 2
-44 19iji1.0g a 42130.1g 1 19 o.o 1 11205~.002 14~18.j4§
-4~ 10964 .490 l~ 14 46. 0 415 1.6 4 lg1g12.~96 17 14774.63 1 4099i.4s~
l!3g~:~34
~4
-41 l 5 64. 43 18 14702.87 4 4044 .74
-4g 18864.78 0 14g~l.117 ~9j08.309
-3 i8~9§i:~~~ ~8 14 9.360 9 78.924 T
18793.~23 lft12§. 66 9876§.9 jl 14487.60 3 390s0.36 a
- 7 1 64 .509 9671 .1 0 ~~ 14415.84 6 3 346.40
- ~ 119s11.1§ 2 505.9 5
§48 6.625 30 3.552 23 24 72. ~
14~44.g~
14 734 .44 A
~784~.83
-34 18434.2 j8 A1261.§1 1 14200.5 7i 4
-33 18362.4 1 9534. 04 ~~ 14128.81 33~363.05 0 .456
-32 1829g.7 t4 87~~4.331 27 14g~1.031 3590~.47~
-31 1821 .9 7 86 3.170 28 13 5.3 4 3544 .91
-30 18147.21 0 84639.27 4 29 13913.54 7 34986.62 0
-29 18075.45 3 83100.61 9 30 13841. 790 34536.41 1
-28 81605.29 2 13770.93 3 34093.12 8
-27 1~003.~j69 1 931. 80151.49 0 j~ 13698. 76 33656.61 2
-26 17860.1~ 2 78737.5~7 33 13~~6.519 3~226.708
-25 17788.4 5 77361.7 7 34 13 4.762 3 803.268
-24 17716.66 8 76022.62 5 13483.~05 32§8~.147
-23 17644.91 1 74718.75 2 ~~ 13411. 48 31 7 .205
-22 17573.j§ 4 37 ~1570.~05
-21 17501. 7 7~448.'7~7 7 211.2 7 38 i~~~;:~jl 1171. 14
-20 1742,.~4 g 11g~§-13 6 39 13195.~77 30773.10 6
-19 1735
- 8 69 .141 40 13124. 20 3039 .554
-18 17286.j~~ 6868~.17~ 41 138~2.463 30008.53 3
-17 17214. 6756 .17 . 42 12 0.706 29631. 94 43 2§260.64~
-lg
-1 17142.s!~
17070. ~~i6g:o~~ 44 8 7.19~
11~938.94 2 894.54
-14 16999.g9 a ~4~64.11B 45 1276~.435 28533.52~
-13 16927. 41 3 47.34 46 1269
- 678 28177.48
-12 16855.58 4 62353.94 8 47 12621. 921 . 27826. 32~
-11 16783.82 7 61383.12 0 48 12550.16 4 27479.93
-!g 11~712.g1 640. 1 g
5 Eo4 4.103 95 6.170 49 50 12478.4g 7 12406.6 0 27138.22 7 26801.10 7
-8 12334.89 3 26468.48 1 1~568.~56 1 496. 99 ~8~98.a2 7 10. 07 6 ~~ 12263.13 6 26140.26 0
- g
-7 35
- 8~
11~42~-~4 5 91.82 g i6~42.01 ~~ 11~11 1 1.9. ~79 22 12047.86 5 25816.3~7 25496.6 8
-4 5j59.469 25181.1~9
-3 16~8~.528 16 0 .771 54 44.451 ~~ 11976.10 8 24869.7 1
-2 16138.01 4 53546.23 3 57 11~04.~Sl 24~62.266
-1 16066.25 7 52764.30 2 58 11 32. 94 24 58.727 0 15994.50 0 51998.16 3 59 11760.83 7 23959.02 9
- VALUE WITH A 23.lK RESISTOR IN PARALLEL WITH SENSOR
~ 1E * -58 TO +122 DEGREE FARENHEIT*
\.-~ 4{MISTO~ B~AD = 44212 RNOM = (- 1. 57 ) T +15994. 5 WHERE T = TEMPERATURE IN DEGREE FARENHEIT
'l'ABLE 3 . lB MODELS 060A-2. 063-1. 061'-2
()
- w:ie. ~ f. RNOM* RC.AL lll:2 om r. EY:IQM* ~
60 11689.g8g ~3663.101 181 8747.043 14077.705 61 11617. 2 3370.871 1 2 8675.286 13892.761 62 11545.56~ 23082.271 103 8603.529 1~7~9.648 63 11473.80 22797.233 104 8531.772 l 5 8.339 gg 113 o. 5 114g2.~~2 22~~~-693 22 .585 105 106 8460.~15 8388. 58 1~348.300 l 171. 28 66 11258.538 21962.848 107 8316.501 12994.973 67 11186.781 21691.420 108 8244.744 12820.620 68 11115.~24 21423.243 108 8172.~87 12647.942 69 11043. 67 21158.258 11 8101. 30 12476.917 70 10971.510 ~0896.408 111 8029.473 1~307.521 71 10899.753 0637.639 112 7957.716 1 139.730 72 10827.~96 113 73 10756. 39 203~1.8~6 201 9.1 6 114 ~a~~:~ij~ 11~7~.522 11 0 .874 74 10684.4~2 19879.278 115 7742.445 11645.765 75 10612.7 5 19632.301 116 7670.688 11484.173 76 10540.~68 19388.147 117 7598.931 11324.077 77 10469. l l 19146.767 118 7527.174 11165.457 78 10~~7.454 18908.114 119 7455.417 11008.292 79 10 5.697 18672.142 120 7383.660 10852.561 80 10253.940 18438.806 121 7311.903 10698.247 81 10182.183 18208.063 122 7240.146 10545.329 82 10110.42~ 17.;79.869 83 10038.66 17 54.182 84 9~66.912 17530.962 85 9 95.155 17310.168 86 9~23.398 17091.760 87 9 51. 641 16875.700 88 89 90 967~.8~4 960 .1 7 9536.370 16661. 951 16450.476 16241.238 0
91 9464.613 16034.203 92 9392.856 15829.335 93 9321.099 15626.601 94 9249.~42 15425.968 95 9177. 85 15227.402 96 9105.828 15030.873 97 9034.071 14836.350 98 8962.314 14643.801 99 8890.557 14453.196 100 8818.800 14264.507
- VALUE WITH A 23.lK RESISTOR IN eARALLEL WITH SENSOR RANGE * -SB TO +122 DEGREE FARENHEIT THERMISTOR BEAD = 44212
- RNOM = ( -71. 757 ) T +15994. 5 WHERE T = TEMPERATURE IN DEGREE FARENHEIT 0
Wind Direction Sensor 0
The Model 024A Wind Direction Sensor is an accurate, durable and economical sensor suitable for a wide range of wind study applications. It is designed for long-term unattended operation in most meteorological environ-ments.
Features o Range to 100 mph o Low starting threshold o Broad temperature operating range o Built-in alignment and calibration feature o Accuracy of +/-5° o Stainless steel and aluminum construction Operation The sensor incorporates a preci-sion wire-wound potentiometer Accuracy, reliability and economy make the model 024A for accurate resolution of wind C) direction. The potentiometer is directly coupled to the vane Wind Direction Sensor an ideal choice for most applications.
assembly. Variations in w nd direction produce a correspond Specifications ing varying voltage . which lends Range 0*360° itself to both digital and analog Starting threshold 1 mph measurement systems Accuracy :!.50 Delay distance <5 feet Construction Damping ratio The construction of the sensor Standard O 25 (metal vane ass'y) reflects the requirement for Fast Response O 4 (foam vane ass'y) reliability and durability. Only Potentiometer the best corrosion resistant Sand , dust. fungus MIL*E-5272 materials, such as stainless steel Salt spray MIL-E-12934 and anodized aluminum are Electrlcal range 0*360° used. The potentiometer meets 0-540° with appropriate translator stringent military specifications Operating range -50° C to +70' C for sand, dust, salt spray and Weight 1 lb2 oz fungus resistance. The Model Mounting Model 191 Cross Arm 024A sensor uses a quick-connect sensor cable Cable length may Ordering Information extend hundreds of feet without Standard Model 024A (Metal Vane) affecting measurement perfor- Fast Response Model 024A*1 (Foam Vane) mance . Cable #1806-xx (xx= length in feet)
Met One Instruments, Inc.
Corporate Sales & Service: 1600 Washington Blvd, Grants Pass, OR 97526, Phone (541) 471-7111 , Fax (541) 471-7116 Distribution & Service: 3206 Main Street, Suite 106, Rowlett. TX 75088, Phone (972) 412-4747, Fax (972) 412-4716 http.//www.metone.com 024A REV 12t.!619S
0 0
0
)
MODEL0 24A WIND DIRECTION SENSOR OPERATION MANUAL Document No. 024A-9800
(
1600 Washington Blvd. Regional Sales & Service Grants Pass, Oregon 97526 3206 Main St, Suite 106 Telephone 541-471*7111 Rowlett, Texas 75088 Facsimile 541-471-7116 Telephone 972-412-4715 Met One Facsimile 972-412-4716 Instruments
0 0
0
024 WIND DIRECTION SENSOR OPERATION MANUAL 1.0 GENERALINFORM\TION
- 1. 1 The Met One 024A Wind Direction Sensor uses a lightweight, air-foil vane and a potentiometer to produce an output that varies proportional to wind direction.
1.2 The Sensor Cable has a quick-connect connector with vinyl-jacketed, shielded cable.
Cable length is given in -XX feet on each cable part number. An 1806-XX cable is used with translators having terminal strip connections, and an 1809-XX cable is used with translators having circular MS type connectors.
TABLE 1-1 Model 024A Wind Direction Sensor Specifications Performance Characterjstjcs Azimuth Electrical 0-356°*
Mechanical 0-360° Threshold 1.0 mph Accuracy
( Damping Ratio
+/-So Standard 0.25 Optional 0.4 Potentjometer Specs.
Sand, Dust, Fungus MIL-E-5272 Salt Spray MIL-E-1293 4 Temperature Range -50° C to +70° C Delay Distance 5 ft.
Electrical Characteristics Output Signal Varying resistance 0-10 K ohms Physical Characteristics Weight 1.5 pounds Finish Anochzed Mounting Fixtures Use with 191 Crossarm Cabling 3-Conductor Shielded Type Cable, xx is cable length in feet
(
024A Revised 6/94
CAUTION: THIS POTENTIOMETER HAS A SHORTING GAP WIPER. ANY VOLTAGE APPLIED TO THE SENSOR MUST BE CURRENT LIMITED TO 5 ()
MILLI AMPS.
2.0 INSTALLATION 2.1 024A Wind Direction Sensor Installation (See FIGURE 2*1)
A Prior to installing the wind direction sensor on the crossarm remove the stainless steel screw from the hub and rotate the vane assembly slowly. It should rotate smoothly without hesitation or binding. Inspect the vane assembly to be sure it is not bent or damaged. Replace the screw in the hub.
B. Install the sensor in the bushing end of the mounting arm. The screw in the bushing will pass through the bushing and will tighten into the sensor housing.
C. Loosen the two set screws holding bushing and orient the sensor so that the counterweight is pointing south. The use of a transiVcompass will assure accurate alignment. When the sensor is properly aligned tighten the crossarm fitting set screws and remove the stainless steel screw from the hub. The sensor may be removed and replaced without realignment by removing the mounting screw in the alignment bushing.
D.
0 Remove and retain shoulder screw (11). Check to see that the vane assembly rotates freely.Rotate the sensor assembly until the counterweight is pointing due south.
E. Connect the cable assembly to the keyed sensor receptacle and tape it to the mounting arm.
2 .2 Wiring. The cable assembly contains three wires. Typical wiring hookup is shown in FIGURE 2*1.
2 .3 lightning Protection. Weather sensors are sensitive to direct or nearby lightning strikes. A well-grounded metal rod or frame should be placed above the sensor installation. In addition, the shield on the signal cable leading to the translator must be connected to be a good earth ground at the translator end, and the cable route should not be vulnerable to lightning.
024A Revised 6/94
- 3. o OPERATIONAL CHECK-OUT AND CALIBRATION
- 3. 1 024 Wind Direction Sensor Check-Out A. Rotating the vane in a clockwise direction as viewed from above will increase the output up to the 360° point and it will start over 0°.
B. The 024A wind direction sensor should be inspected periodically for physical damage to the vane assembly and cable connections. Inspect all vane assembly parts to be sure that they are securely fastened. Inspect the sensor connector and mating cable connector for corrosion.
- 4. O MAINTENANCE
- 4. 1 General Maintenance Scbeciute*
6*12 Month Intervals:
A. Inspect sensor for proper operation per Section 3.0.
24-36 Month Intervals:
A. Factory replacement of potentiometer per Section 4.
0 B. Recommended complete factory overhaul of sensor.
4 .2 POTENTIOMETER REPLACEMENT 4.3 Remove the sensor from the crossarm and remove the vane assembly. Replacement of the potentiometer will require realignment with respect to 180 degrees. Use the following procedure to replace and realign the potentiometer.
A) Loosen the three set screws which hold the potentiometer in the sensor housing. Pull the potentiometer up and out of the housing.
B) Remove the three wires from the potentiometer assembly. Note the color code of the wires with respect to the pins on the potentiometer. (See the 024A Assy. Owg.)
C) Solder the wires to the new potentiometer and install the potentiometer in the sensor housing.
) 024A Revised 6/94
- 0) Connect the ohmmeter across pins Band Con the sensor connector. Install the vane assembly and the stainless steel hub alignment screw. Do not tighten the two hub set screws at this time. Insert a small screwdriver in the access hole in the top of the hub and rotate the potentiometer until the resistance measured across pins B and C is equal to the resistance across pins A and C (approx. 6k ohms). Tighten the two set screws carefully. The potentiometer position will tend to move slightly as these screws are tightened.
4.4 RECOMMENDED SPARE PARTS LIST (Refer to Drawing #024A)
Ref Part No. Description A 2089 Aluminum Vane B 2088 Vane Arm for Aluminum Vane A,B 1286 Foam Vane and Arm Assy c 1685-10 Hub D 1814-1 Counterweight Arm for Aluminum Tail 0 1814-2 Counterweight Arm for Foam Tail E 1057 Counterweight A-E 2105 Aluminum Vane Assy, Complete A-E 2106 Foam Vane Assy, Complete F 2017 Potentiometer Assy G 860015 Shoulder Screw 0
601625 8-32 x1/4 Set Screw L 601680 8-32 x 3/8 Set Screw K 601070 2-56 x 1/6 Screw 024A Revised 6/94
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Evaporation Gauge
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(4i1Jei1@ Features o Simple data collecting u High resolution n Analog output o Corrosion resistant o Range 0-8" The Model 550502 Evaporation Gauge measures the water level in a standard U.S. Class A evaporation pan (Model 550501) and provides an output proportional to that level. The gauge employs a uniquely balanced sensor assembly to allow high resolution and simple data collection without hook gauge readings and time con-suming, frequent visits to the site The sensor assembly inc udes one polypropylene float which rises and falls with the water
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level in the pan. The movement of the float is transferred to a SK*
ohm potentiometer by means of a rack and gear assembly. The mechanism 1s designed to ellm nate backlash The output range is O to 8 inches, with a measuring accuracy of 1%.
Movement of the float assembly also moves a pointer over an Evaporation Pan Specifications indicating scale for convenient It 1s constructed of low carbon Sensor: Single-float assembly water level checks and stainless steel and 1s heharc on vertical guide rods.
comparison to output device we ded The pan 1s normally Transducer: SK-ohm readings The scale is graduated installed on a level wooden potentiometer In Enghsh units on one side and p'atform set on the ground Range: 0-8" metric units on the other Resolution: Infinite Accuracy: 1% (with clean The potentiometer output can guide rods) be input directly to a data Potentiometer linearity: +/-0 5%
acqu1s1bon system Cable: 3 conductor shielded ,
Alternate ly 1t can be input to a 50' provided signal conditioning module. Weight/shipping: 7.5/10 lbs
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MODEL 550502 EVAPORATION GAUGE OPERATION MANUAL DOCUMENT 550502-9800 1600 Washington Blvd. Regional Sales & Service Grants Pass, Oregon 97526 3206 Main St., Suite 106 Telephone 541-471-7111 Rowlett, Texas 75088 Facsimile 541-471-7116 Telephone 972-412-4715 Met One Facsimile 972-412-4716 Instruments
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( Model 550502 Evaporation Gauge Operation Manual
- 1. 0 INTRODUCTION
- 1. 1 Description The Model 550502 Analog Output Evaporation Gauge was designed to accurately measure the changing water level in an evaporation pan and provide an electrical signal proportional to the water level from which the evaporation rate can be determined.
Although it can be used with a wide variety of evaporation systems, it is normally used with a standard Class A, National Weather Service evaporation pan. The gauge consists of a Hoat, pulley, and counterweight attached to a precision 1000 ohm potentiometer, all mounted in a protective enclosure.
- 1. 2 Specifications Electrical Output Range 0-9.73* = 0-5 Vdc Water Level Range a-a.a* = o-4.11 Vdc Height 27-1/2" Diameter 8*
j Weight 7-1/2 lbs.
Cable #5883-x (X 1s length in feet) Specify length when ordering cable.
Connector 3 pin MS-type Float 5" diameter Counterweight 4 oz Water input port 11- NP coupling, female Base dimensions 16' tnangle with leveling screws Total resolution 0.0382" with 8-b1t converter in datalogger Potentiometer Accuracy 1°~
Rotation Continuous Resistance 1000 ohms, standard Operating Temperature -50° to +125°F Linearity 0.25%
Power 5 Vdc reg 550502 Evap Gauge 12/93
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- 2. 0 INSTALLATION
- 2. 1 After carefully unpacking all components, inspect for damage that may have occurred in shipment. Do not discard any packing material until you are certain there is no damage and all items are accounted for, including accessories. In the event of damage during shipment, a claim for loss should be filed with carrier at the receiving location.
- 2. 2 Remove the top cap and remove the float, chain, and counterweight which are packed in the housing for shipping.
- 2. 3 The gauge is connected to the pan by using 1/2" diameter pipe. Flexible tubing is acceptable provided it is not subject to deterioration. The gauge should be placed tar enough away from the pan so that it will not cast a shadow on the pan that could have an effect on the evaporation process.
- 2. 4 Level gauge by placing a level on the housing in front of the gear and adjusting the leveling screws on the triangular base until the unit is level.
- 2. 5 After connecting the gauge to the pan and securing all electncal connections. till evaporation pan with a* of water and carefully check all joints for leaks.
2.6 The pulley and the potentiometer housing have been marked with indicators that line up when the potentiometer is approximately at the breakpoint between zero and 1000 ohms 0 resistance. To obtain the exact breakpoint for zeroing or base setting, use an ohmmeter across the white and red wires or use the actual readout device that will be used with the unit when in operation.
- 2. 7 The lloat chain should be placed on the pulley so that the :loat rests on the tcp of the water {8" in the evaporation pan) when the pulley is at the breakpoint. For operation, the float chain is placed on the pulley so that a falling level of water will cause c!ockw1se (as seen from the front of the pulley) motion in the pulley and a decrease in resistance in the potentiometer output. Refer to the assembly diagram.
- 2. 8 Carefully secure housing cover into place with allen screws.
- 3. O CPEAATlCN The potentiometer produces a proportional output in relation to the position of the float and can be monitored on site with a datalogger or strip chart recorder.
550502 Evap Gauge 12/93
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- 4. 0 TROUSLESHC011NG
- 4. 1 Always disconnect the reporting/recording device from power or troubleshoot immediately whenever any of the following conditions are observed: the cable has been damaged, the gauge does not appear to operate normally or exhibits a marked change in performance, the gauge has been dropped or damaged, or it moisture damage has occurred to the circuits.
- 4. 2 If the gauge does not register correctly, first check the connections. Check the potentiometer with a voltmeter. Be sure the reporting/recording device has been powered*up correctly. If the reporting/recording device uses batteries for its primary source of power, check that the batteries have sufficient voltage to power the device.
4 .3 Check the sensor cable connections both at the gauge and at the control unit. Cable shorts can cause lack of readings. If a connection is found to be lose, tighten into place and check to see if the problem has been corrected.
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550502 Evap Gauge 12193
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500502 EVAPO RATIO N GAUGE ASSEMBLY
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WeatherHawk Series 500 Specifications Weather Station Temperature Range: -40 to +122F (-40 to +SOC)
Data Storage : 60 days of hourly data I/O: Direct connection RS232 Optional Wireless RF I/O Data Rate: 9600 baud Wireless Frequency: Spread Spectrum 916 MHz Battery: Integrated 2.9 AHr Lead-Acid GelCel Charging Voltage: 16 tO 22 VDC Current Drain : 10 mA w/o heater 1.1 A with heater Sensors Air Temperature: Capacitive ceramic Range -60 to + 140F (-S2 to +60 C)
Accuracy: +/-0.9 F@ -40 to 12S F (+-0.S C @-40 to S2 C)
Resolution: 0.1 F (0.1 C)
Relative Humidity: Capacitive thin-film polymer Range 0-100%
Accuracy: +/- 3%@ 0-90%RH; +/- S%@ 90-1000/oRH Resolution: 0.1%
Barometric Pressure: Capacitive Silicon Range: 17.72-32.48 inHg (60-110 kPa)
Accuracy: .OlS inHg @+32 to +86 F (+ - .OS kPa @0-32 C)
Resolution: .03 inHg @-60 to + 140 F ( +-.1 kPa @-S2 to +60 C)
Solar Radiation: Silicon pyranometer Spectral Range 300 to 1100 nm Reproducibility +/-2%
Output .2 mV per W/m"2 Range Oto 1000 W/m"2 Temp. Range -40 to 130 F (-40 to +SSC)
Rain: Piezoelectric Collecting Area 9.3 in"2 (60 cm"2)
Range Oto 7.87 in/hr (0 to 200 mm/hr)
Accuracy: <S% (weather dependant)
Resolution .001 in (.01 mm)
Wind Direction: Ultrasonic Azimuth: 0-360 deg Response Time: 2SO ms Accuracy: +- 2 deg Resolution: 1 deg Wind Speed: Ultrasonic Range: 0-134 mph (0-60 m/s)
Response Time: .2S s Accuracy: +-.67 mph ( +- 0.3m/s) or +-2% which ever is greater Resolution: .22 mph (0.1 m/s)
WeatherHawk, 185 West 1800 North, Logan, UT International: 435-750-1802 TOLL FREE USA: 866-670-5982 FAX: 435-750-1749 http://www.wea t herhawk.com sales@weatherhawk.com
WeatherHawk Series 500 General
Description:
The WeatherHawk Series 500 family of weather stations measure and record wind speed and direction, air temperature and relative humidity, barometric pressure, solar radiation, and rain. In addition, the system calculates and exports an evapotranspiration (ET) value that can be used by third party systems for irrigation control. They are designed for applications where a minimal visual impact, high reliability, and a long interval between routine servicing are significant factors in the decision to purchase. The standard Series 500 system incorporates an integral 3 AHr battery pack and can be interfaced with an optional solar panel for high reliability applications.
The Series 500 family is fully compatible with all versions of software, data management, input power and mounting accessories designed for the WeatherHawk Signature Series. It is also backwards compatible with all third party certified software drivers.
The Series 500 WeatherHawk systems utilize solid state sensors, with no moving parts. Solid state sensors enable a low profile design better suited to high visibility locations where a traditional weather station would be visually objectionable; they have higher reliability and a longer interval between routine service and inspection requirements; they are more robust and less susceptible to damage from wind carried debris; and they are not impaired by heavy snowfall or freezing conditions that produce rime ice (NOTE: Heated sensor versions, Models 511/521, must be used in snow or freeze zone applications).
Models 510/511 These versions of the Series 500 weather station are directly connected to a host device (PC or server) through an RS232 serial data I/O located on the bottom of the weather station. The Model 511 incorporates a thermostatically controlled heater element in the sensor head that keeps the ultrasonic wind sensor elements and the piezometric precipitation sensor surface free of snow and ice to -52° C.
Models 520/521 These versions of the Series 500 weather station are wireless to a host device (PC or server) using fully integrated industrial grade 916 MHz spread spectrum RF communications technology. They also have an RS232 serial data I/O located on the bottom of the weather station, which can be used as a second serial communications port, or for programming and testing the system, or for direct data downloads using a PC or PDA. The Model 521 also incorporates a thermostatically controlled heater element in the sensor head that keeps the ultrasonic wind sensor elements and the piezometric precipitation sensor surface free of snow and ice to -52° C. Optional configurations of both units enable replacement of the 916 MHz RF components with 922 MHz and 2.4 GHz RF components to comply with local, regional or national radio frequency licensing requirements.
WeatherHawk, 185 West 1800 North, Logan, UT International: 435-750-1802 TOLL FREE USA: 866-670-5982 FAX: 435-750-1749 http ://www.w eat herhawk. com sa les@weatherh aw k. com
Sensor Technologies Series 500 WeatherHawk weather stations employ the latest in weather measurement sensors. Wind speed and direction use acoustic techniques formerly available on only the most expensive professional wind velocity measurement systems. Rain is measured using an impact surface that literally counts the raindrops and measures their acoustic signature, integrating that information to provide a near real-time value for rainfall amount and rate. Barometric pressure, relative humidity, air temperature and solar radiation measurements are made by calibrated scientific grade sensors typically installed in the finest professional weather measurement and monitoring systems.
Wind Speed & Direction is measured by a sensor consisting of three equally spaced ultrasonic transducers in a horizontal plane. The sensor measures the bi-directional transit time along the three paths established by the transducer array. This transit time is dependent on the wind velocity across the ultrasonic path. For zero wind velocity, both the forward and reverse transit times are identical; with wind, the upwind transit time increases and the downwind time decreases. The values of any two array paths will enable computation of both wind speed and direction, and a signal processing technique enables the measurement to be calculated using the two array paths of the best quality. If the system is used in a high accuracy application a factory revalidation is recommended every five years.
Rainfall is measured with a stainless steel piezometric surface on top of the weather station. As individual raindrops (or hailstones) impact on the surface they each provide an acoustic signature that is measured and processed in real-time to give a value for their volume. The volume is then processed with respect to time to provide a rainfall rate. This measurement technique eliminates all of the traditional problems with tipping bucket type rainfall measurement devices, including worn or damaged bearings, clogged funnels and drip orifices, and damage from wind blown debris.
Air temperature and relative humidity CRH) sensors are combined In an integrated, user replaceable unit that requires no calibration. The RH sensor is a thin polymer, capacitive type sensor that degrades with exposure due to age and airborne contaminates. It should be user replaced every three years to maintain accuracy, and at a shorter interval if the location is subject to high levels of air pollution or is subject to airborne chemical spraying. The air temperature sensor is a capacitive ceramic sensor that is typically not subject to environmental degradation.
Barometric pressure is measured with a capacitive silicon temperature corrected strain gauge device that is typically not degraded by environmental exposure and does not require calibration after manufacture.
Solar Radiation is measured by a silicon pyranometer with a cut filter limiting the spectral exposure to the 300-1100 nm wavelength. This device typically degrades at a rate of 2% of the full scale value each year and should be recalibrated, or replaced every 3-5 years, depending on the application.
Data Transfer Protocols, Software and Data Interface Hardware All WeatherHawk systems communicate using a proprietary Pakbus protocol. Any qualified software developer may request a software development kit, at no charge, to assist in the development of software drivers for third party devices or software.
WeatherHawk, 185 West 1800 North, Logan, UT International: 435-750-1802 TOLL FREE USA: 866-670-5982 FAX: 435-750-1749 http ://ww w.weatherhawk .com sales@weatherh awk. com
Software WeatherHawk offers the following software applications for weather station management, data acquisition and logging, report generation and data display.
> Visual Weather Station - a single host, multi-site professional application that will communicate with any WeatherHawk weather station, as well as CR200 Series data loggers from Campbell Scientific, Inc. Visual Weather Station adapts to any data telemetry scheme including direct connection, wireless short haul RF (spread spectrum radio), wireless long-haul RF (VHF/UHF radio), satellite modem, IP modem/server module, or landline and cellular modems. The application also offers a variety of standard and user defined reports and export file formats, and it will support the generation, export and update of a weather data GUI for a website. This application runs on PC-XP computers.
,. WeatherHawk-XPI X - a single host, single site consumer application that will communicate with any WeatherHawk weather station. WeatherHawk -
XP/X connects using a directly to the serial port on the WeatherHawk, or by wireless short haul RF (spread spectrum radio), or IP modem/server module, or landline and cellular modems. The application also offers a three export file formats, and it will support the generation, export and update of a weather data GUI for a website. This application runs on PC-XP and Macintosh OS-X computers. This software application will also interface with the NOAA/NWS CAMEO application for First Responder applications requiring plume modeling.
> Virtual Weather Station - a single host, single site consumer application that will communicate with any WeatherHawk weather station. Virtual Weather Station connects directly through the serial port on the WeatherHawk, or by wireless short haul RF (spread spectrum radio). The application also offers a two export file formats, and it will support the generation, export and update of a weather data GUI for a website. This application runs on IBM compatible computers.
> LoqqerNet - a single host, multi-site professional application that will communicate with any WeatherHawk weather station, as well as any data loggers from Campbell Scientific, Inc. LoggerNet adapts to any data telemetry scheme including direct connection, wireless short haul RF (spread spectrum radio), wireless long-haul RF (VHF/UHF radio), satellite modem, IP modem/server module, or landline and cellular modems. The application also offers a variety of standard and user defined reports and export file formats, and with the RTMC module it will support the generation, export and update of a weather data GUI for a website. This application runs on IBM compatible computers.
> PConnect - a single host, single site professional application that will communicate with any WeatherHawk weather station, as well as a range of Campbell Scientific data loggers. PConnect is used for direct download and storage of data through the serial port on either the weather station or its companion RF4xx receiver (if wireless). The software is typically utilized for field data acquisition with later export to a PC for post-processing, display and long-term archiving. It also enables on-site reprogramming of the weather station by uploading pre-configured program files. It is not designed for long haul or automated data collection protocols. This application runs on a range of PDA devices, check with Campbell Scientific, or WeatherHawk for a list of compatible units.
WeatherHawk, 185 West 1800 North, Logan, UT International: 435-750-1802 TOLL FREE USA: 866-670-5982 FAX: 435-750-1749 htto ://www.w eatherhawk .com sa les@weatherh awk.com
~ Weather Display - a single host, single site consumer application that will communicate with any WeatherHawk weather station. Weather Display connects directly through to the serial port on the WeatherHawk, or by wireless short haul RF (spread spectrum), or IP modem/server module.
The application also offers a range of export file formats, and it will support the generation, export and update of a weather data GUI for a website. This application runs on PC-XP computers.
Data Interface Hardware Weatherproof serial cables are available in 25, 50 and 75 foot lengths for permanent direct connection to the RS232 I/O on any WeatherHawk weather station. These cables feature nickel plated brass DB-9 connectors for corrosion resistance and have a Sanoprene jacket which is suitable for both high UV and direct burial environments.
An RF4xx spread spectrum RF transceiver is supplied as standard equipment with every wireless WeatherHawk weather station. The unit comes with an AC power supply (120 VAC/60 Hz), a 6 foot serial cable and an antenna. Additional RF4xx kits can be purchased for simultaneous communication with any WeatherHawk wireless weather station, enabling multiple host computers to use the data from a single weather station. Typical applications for multiple receiver units are in home automation where a single weather station may support a whole house control unit, with touch panel data display units; and a discrete PC, which may act as the server for a local intranet or internet weather data display website.
WeatherHawk IP server modules are a proprietary web server that is designed to interface the serial output of any WeatherHawk weather station, or companion RF4xx transceiver with an Ethernet. Output formats from the IP server module are HTML, XML and CSV (with headers).
Mounting Systems All WeatherHawk weather stations will interface with the full range of mounting systems supplied by WeatherHawk. They consist of:
TP-1 Tripod - The tripod, with its range of accessories is the most rugged and adaptive weather station mounting system. It supports both rooftop (sloped and flat) and ground mounts, with mast heights to 10 feet. Accessories consist of a weather station alignment kit (optional), ground stakes (optional), a rooftop sealing kit (standard), grounding rod kit (optional), mast length extensions (optional), and a guy-wire kit (optional).
HM Series - The HM Series house mount kits are adapted satellite dish mounts that will support attachment to sloped and flat roofs, and to the vertical facia and reinforced trim boards around the roofline of a home. The accessories consist of mast extensions, a Retro-deck base assembly that offers additional stability and support on composite roof coverings; and a Comm-deck mount that offers a weatherproof penetration through a roof for a directly connected weather station.
Various additional specialized mounting tripods are available for high environmental abuse environments, or quick deployment temporary applications.
WeatherHawk, 185 West 1800 North, Logan, UT International: 435-750-1802 TOLL FREE USA: 866-670-5982 FAX: 435-750-1749 http://www.w eatherhawk. com sales@weat herhawk. com