Campbell 27106T, Инструкция по эксплуатации

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27106T Vertical Propeller Anemometer
9
TABLE 7-2. Wind Speed Multiplier 1
Unit Multiplier
Miles per Hour 0.04025
Meters/Second 0.01800
Kilometers/Hour 0.06480
Knots 0.03496
1
When the propeller is used for measuring the vertical wind component, users may
want to apply an additional multiplier of 1.25 to the output signal. This may be done
numerically in the data processing operations or electronically in the signal
conditioning. Using the additional multiplier brings the anemometer output signal
within ±3% of the cosine response for elevation angles between –30° and 30°. Since
the standard deviation of wind elevation angle in open terrain rarely exceeds 12°,
98% (2.5 standard deviations) of observations will be within ±30°. Using the
multiplier is not necessary when the anemometer is used in a UVW configuration
with R.M. Young model 26601UVW Translator.
8. Maintenance and Troubleshooting
All factory repairs and replacements require a returned material
authorization (RMA) and completion of the “Declaration of
Hazardous Material and Decontamination” form. Refer to the
Assistance page at the beginning of this manual for more
information.
8.1 Maintenance
Given proper care, the 27106T should provide years of service. Components
are conservatively rated and require little maintenance. The only parts likely to
need replacement due to normal wear are the precision ball bearings and the
tach-generator.
Campbell Scientific recommends returning the sensor to the
factory and having our qualified technicians replace the
bearings and tach-generator. When available, a qualified
technician can replace the bearings and/or generator by
following the procedures included in this document. These
replacement procedures are from R.M. Young 27106T
Operational Manual
.
8.1.1 Flange Bearing Replacement
If anemometer bearings become noisy or wind speed threshold increases above
an acceptable level, bearings may need replacement. You can check bearing
condition using a Model 18310 Anemometer Bearing Torque Disk (available
from R.M. Young). If, after replacing bearings, the torque is still too high,
check the tach-generator.
NOTE
CAUTION