Campbell Scientific 014A Met One Wind Speed Sensor - Manual (Page 20)

Met One 014A Wind Speed Sensor
8.1.2 12 to 24 Month Service
Replace sensor bearings.
8.1.3 24 to 36 Month Service
A complete factory overhaul of the sensor is recommended. Contact Met One
directly for wind speed sensor repair and recalibration service. This repair and
calibration service includes disassembly and detailed inspection of all moving
mechanical parts and all electronic components. Service includes replacement
of bearings, shaft, and set screws as well as a functional test of the sensor.
Charges above the basic service charge may be added for replacement of
additional materials.
Met One Instruments, Inc.
1600 Washington Blvd.
Grants Pass, OR 97526
(541) 471-7111
FAX (541) 471-7116
9. Troubleshooting
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 reed switch. The resistance between the white and black wires should
vary from infinite (switch open) to less than 1 ohm (switch closed) as the
cup wheel is slowly turned.
3. Verify that the Configuration Code (switch closure, hertz), 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.
10. 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.
EPA, 1987: On-Site Meteorological Program Guidance for Regulatory
Modeling Applications, EPA-450/4-87-013, Office of Air Quality Planning and
Standards, Research Triangle Park, NC 27711.
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