020C Wind Direction Sensor
10
8.1 Troubleshooting
Consult TABLE
for recommended actions to resolve various problems.
TABLE 8-1. 020C Wind Direction Sensor Troubleshooting
Symptom
Probable Cause
Solution
Refer to
No wind
direction
output
Loss of supply
voltage
Check datalogger
12 Vdc supply
and connecting
cables
(p. 5)
No wind
direction
output
Faulty integrated
circuit amplifier
(output often will
be steady 5.0 V)
Replace IC
amplifier (plug-
in)
Contact
Campbell
Scientific for
repair
authorization
No wind
direction
output
Faulty
potentiometer
Replace
potentiometer
Contact
Campbell
Scientific for
repair
authorization
No change in
wind
direction
output below
2 to 5 mph
Bad bearings
Replace bearings
Contact
Campbell
Scientific for
repair
authorization
8.2 Maintenance Schedule
6 to 12 Month Intervals:
1.
Inspect sensor for proper operation per Section
(p. 9)
2.
Return to Campbell Scientific for calibration.
12 to 24 Month Intervals:
1.
Return to Campbell Scientific for replacement of sensor bearings.
2.
Return to Campbell Scientific for replacement of sensor potentiometer.
9. References
The following references give detailed information on siting wind-speed and
wind-direction sensors.
EPA, 1989:
Quality Assurance Handbook for Air Pollution Measurements
System
, Office of Research and Development, Research Triangle Park,
NC, 27711.
Summary of Contents for 020C
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