Campbell Scientific 020C Wind Direction Sensor - Manual (Page 18)

Model 020C Wind Direction Sensor
8. Troubleshooting and Maintenance
8.1 Troubleshooting
Consult Table 8-1 for recommended actions to resolve various fault conditions.
TABLE 8-1. 020C Wind Direction Sensor Troubleshooting
Symptom Probable Cause Solution Refer to
No wind
direction
output Loss of supply
voltage Check datalogger
12Vdc supply and
connecting cables Table 7-1, 020C
Wiring
No wind
direction
output Faulty integrated
circuit amplifier
(output often will
be steady 5.0V) 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
2-5 mph Bad bearings Replace bearings Contact
Campbell
Scientific for
repair
authorization
8.2 Maintenance Schedule
6-12 Month Intervals:
1. Inspect sensor for proper operation per Section 7.6, Sensor Check-Out.
2. Return to Campbell Scientific for calibration.
12-24 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.
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