03001 R.M. Young Wind Sentry Set 03101 R.M. Young Wind Sentry Anemometer 03301 R.M. Young Wind Sentry Vane Revision: 8/07 C o p y r i g h t © 1 9 8 6 - 2 0 0 7 C a m p b e l l S c i e n t i f i c , I n c .
Warranty and Assistance The 03001 R.M. YOUNG WIND SENTRY SET, 03101 R.M. YOUNG WIND SENTRY ANEMOMETER, AND 03301 R.M. YOUNG WIND SENTRY VANE are warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.
R.M. Young Wind Sentry Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to specific sections. 1. Introduction..................................................................1 2. Specifications ..............................................................2 3. Installation....................................................................3 3.1 3.2 3.3 3.4 3.5 Siting........................................
R.M. Young Wind Sentry Table of Contents Appendices A. Wind Direction Sensor Orientation........................ A-1 A.1 Determining True North and Sensor Orientation................................ A-1 B. Wind Direction Measurement Theory .................... B-1 B.1 AC Half Bridge (P5) and BRHalf Instructions.................................... B-1 B.2 EX-DEL-SE (P4) Instruction .............................................................. B-1 Figures 3-1.
R.M. Young Wind Sentry 1. Introduction The 03001 Wind Sentry Set is used to measure horizontal wind speed and direction. Wind speed is measured with a three cup anemometer. Rotation of the cup wheel produces an AC sine wave voltage with frequency proportional to wind speed. Vane position is transmitted by a 10K ohm potentiometer. With a precision excitation voltage applied, the output voltage is proportional to wind direction.
R.M. Young Wind Sentry The 03301 Vane ships with: (1) 03301 Vane (1) 10” x 3/4” threaded galvanized pipe (P/N 12243) (1) Allen wrench (P/N 5201) 2. Specifications Wind Speed (Anemometer) Specifications Range: 0 to 50 m s-1 (112 mph), gust survival 60 m s-1 (134 mph) Sensor: 12 cm diameter cup wheel assembly, 40 mm diameter hemispherical cups Accuracy: ±0.5 m s-1 (1.1 mph) Turning Factor: 75 cm (2.5 ft) Distance Constant (63% recovery): 2.3 m (7.5 ft) Threshold: 0.5 m s-1 (1.
R.M. Young Wind Sentry NOTE The black outer jacket of the cable is Santoprene® rubber. This compound was chosen for its resistance to temperature extremes, moisture, and UV degradation. However, this jacket will support combustion in air. It is rated as slow burning when tested according to U.L. 94 H.B. and will pass FMVSS302. Local fire codes may preclude its use inside buildings. 3. Installation 3.1 Siting Locate wind sensors away from obstructions (e.g. trees and building).
R.M. Young Wind Sentry the datalogger has been programmed to measure wind direction as described in Appendix A. Route the sensor cable along the underside of the crossarm to the tower/tripod mast, and to the instrument enclosure. Secure the sensor cable to the crossarm and mast using cable ties. CM220 CM200 Series Crossarm FIGURE 3-1. 03001 Mounted to CM200 Series Crossarm with CM220 PN 1049 Nu-Rail CM200 Series Crossarm FIGURE 3-2.
R.M. Young Wind Sentry CM220 CM200 Series Crossarm FIGURE 3-3. 03101 Anemometer Mounted to CM200 Series Crossarm with CM220 CM216 FIGURE 3-4.
R.M. Young Wind Sentry 3.4 03101 Anemometer Install the cupwheel to the anemometer shaft using the Allen wrench provided with the sensor. The 03101 mounts to a threaded 0.75” IPS schedule 40 pipe (1.05” O.D.). A 10” long mounting pipe ships with the 03101 for attaching the sensor to a 019ALU or CM200 series crossarm with CM220 (Figures 3-3) or PN 1049. The 03001 can also be mounted at the top of a CM6/CM10 tripod mast, or to a CM110 series tripod with the CM216.
R.M. Young Wind Sentry Wind Speed Wind Direction 5. Example Programs This section is for users who write their own programs. A datalogger program to measure this sensor can be created using Campbell Scientifics’ Short Cut Program Builder software. You do not need to read this section to use Short Cut. 5.1 Wind Speed Wind speed is measured with the Pulse Count instruction, and with the low level AC configuration.
R.M. Young Wind Sentry 5.2 Wind Direction The wind vane is coupled to a 10K potentiometer, which has a 5 degree electrical dead band between 355 and 360 degrees. The EX-DEL_SE measurement instruction (P4) is used for dataloggers that are programmed with Edlog (e.g. CR10X, CR23X) and the CR200. The multiplier to convert the measurement result (mV) to degrees is 355 deg/excitation mV. The BRHalf measurement instruction is used for dataloggers that are programmed with CRBasic (e.g. CR1000, CR3000).
R.M. Young Wind Sentry TABLE 5-3. Wiring for Example Programs Color Description CR1000 CR10X Black Wind Spd. Signal P1 P1 White Wind Spd. Reference G Clear Wind Spd. Shield G Red Wind Dir. Signal SE 1 SE 1 Black Wind Dir. Excitation EX 1 E1 White Wind Dir. Reference AG Clear Wind Dir. Shield G 5.4.
R.M. Young Wind Sentry 'Call Data Tables and Store Data CallTable(Table1) NextScan EndProg 5.4.2 CR10X Example Program ;{CR10X} *Table 1 Program 01: 5.0000 Execution Interval (seconds) 1: Batt Voltage (P10) 1: 1 Loc [ Batt_Volt ] ;03001 or 03101 RM Young Wind Sentry Wind Speed Sensor measurement - WS_ms: 2: Pulse (P3) 1: 1 Reps 2: 1 Pulse Channel 1 3: 21 Low Level AC, Output Hz 4: 2 Loc [ WS_ms ] 5: 0.75 Multiplier 6: 0.2 Offset 3: If (X<=>F) (P89) 1: 2 X Loc [ WS_ms 2: 4 < 3: 0.
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R.M. Young Wind Sentry For dataloggers programmed with Edlog (and the CR200), the EX-DEL-SE (P4) measurement instruction should be used. Enter a 2 in the P4 “Delay” parameter for a 20 millisecond delay. For dataloggers programmed with CRBasic, increase the “Settling Time” parameter of the BRHalf instruction to 20 milliseconds (20,000 microseconds). CAUTION The 60 Hz rejection option can not be used with the DC Half Bridge instruction, when the delay is not zero.
R.M. Young Wind Sentry Symptom: Incorrect wind direction 1. Verify that the Excitation voltage, Range code, multiplier and offset parameters are correct for the datalogger type. 2. Check orientation of sensor as described in Section 3. 7.2 Wind Speed Symptom: No wind speed 1. Check that the sensor is wired to the Pulse channel specified by the Pulse count instruction. 2. Disconnect the sensor from the datalogger and use an ohm meter to check the coil.
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Appendix A. Wind Direction Sensor Orientation A.1 Determining True North and Sensor Orientation Orientation of the wind direction sensor is done after the datalogger has been programmed, and the location of True North has been determined. True North is usually found by reading a magnetic compass and applying the correction for magnetic declination; where magnetic declination is the number of degrees between True North and Magnetic North.
Appendix A. Wind Direction Sensor Orientation Subtract declination from 360° Add declination to 0° 20 W 22 E 18 W 16 W 20 E 14 W 12 W 18 E 10 W 8 W 16 E 6 W 4 W 14 E 2 W 0 12 E 10 E 8 E 6 E 4 E 2 E FIGURE A-1. Magnetic Declination for the Contiguous United States FIGURE A-2.
Appendix A. Wind Direction Sensor Orientation FIGURE A-3.
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Appendix B. Wind Direction Measurement Theory It is not necessary to understand the concepts in this section for the general operation of the 03001 with Campbell Scientific’s datalogger. Rt Rs EXCITATION VOLTAGE (Vx) SIGNAL + (Vs) AZIMUTH REFERENCE EARTH GROUND CONNECTION FIGURE B-1. 03001 / 03301 Potentiometer in a Half Bridge Circuit B.1 BRHalf Instruction The BRHalf instruction outputs a precise excitation voltage (Vx), and measures the voltage between the wiper and ground (Vs).
Appendix B. Wind Direction Measurement Theory excitation voltage of 2500 mV recommended for the CR10(X) and 5000 mV for an excitation voltage of 5000 mV recommended for the CR23X at 355 degrees. The multiplier to convert Vs to degrees is 355 degrees / 2500 mV = 0.142 for the CR10X, or, 355 degrees / 5000 mV = 0.071 for the CR23X. See Section 13.
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