Campbell Scientific 03001-L R.M. Young Wind Sentry Set - Manual (Page 17)

R.M. Young Wind Sentry
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 3.
7.2 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 should be a
nominal 1350 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.
8. 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.
The State Climatologist, 1985: Publication of the American Association of
State Climatologists: Height and Exposure Standards, for Sensors on
Automated Weather Stations, vol. 9, No. 4.
WMO, 1983: Guide to Meteorological Instruments and Methods of
Observation, World Meteorological Organization, No. 8, 5th edition, Geneva,
Switzerland.
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