NOTE:
Campbell Scientific recommends factory replacement of the bearings and potentiometer.
Refer to the
page of this document for the procedure of acquiring a Returned
Materials Authorization (RMA). Mechanically-adept users may choose to replace the bearings
or potentiometer themselves. Instructions for replacing the bearings and potentiometer are
given in R.M. Young manuals (
). A video that describes
changing the bearings is available at:
www.campbellsci.com/videos/wind-monitor-bearing-
.
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 terminal specified by the
measurement instruction.
2. Verify that the excitation voltage and range code are correct for the data logger type.
3. Disconnect the sensor from the data logger and use an ohmmeter to check the
potentiometer. Resistance should be about 10 kΩ between the blue and white wires. The
resistance between either the blue/green or white/green wires should vary between about
1 kΩ to 11 kΩ depending on vane position. Resistance when the vane is in the 5 degree
dead band should be about 1 MΩ.
Symptom: Incorrect wind direction
1. Verify that the excitation voltage, range code, multiplier and offset parameters are correct
for the data logger type.
2. Check orientation of sensor as described in
9.2 Wind speed
Symptom: No wind speed
1. Check that the sensor is wired to the pulse terminal specified by the pulse count
instruction.
Wind Monitor Series
15
