Campbell Scientific 03002, 03101, and 03301 R. M. Young Wind Sentry Sensors - Manual (Page 24)

R.M. Young Wind Sentry
9. Troubleshooting
9.1 Wind Direction
Symptom: NAN, –9999, or no change in direction
1. Check that the sensor is wired to the excitation and single-ended channel
specified by the measurement instruction.
2. Verify that the excitation voltage and range code are correct for the
datalogger type.
3. Disconnect the sensor from the datalogger and use an ohm meter to check
the potentiometer. Resistance should be about 10 k Ω between the black
and white wires. The resistance between either the black/red or white/red
wires for the 03301 and blue/red or white/red for the 03002 should vary
from 1 k
Ω to 11 kΩ depending on vane position. Resistance when the
vane is in the 8 degree dead band should be about 1 M Ω.
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 4.1, Step 1 — Mount
the Sensor.
9.2 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. The resistance between the white and black wires for the 03101
and black and red wires for the 03002 should be a nominal 1300 ohms.
Infinite resistance indicates an open coil; low resistance indicates a
shorted coil.
3. Verify that the configuration code, and multiplier and offset parameters
for the pulse count instruction are correct for the datalogger type.
Symptom: Wind speed does not change
1. For the dataloggers that are programmed with Edlog, the input location
for wind speed is not updated if the datalogger is getting “Program Table
Overruns”. Increase the execution interval (scan rate) to prevent overruns.
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