Overview - Campbell Wind Monitor Series Product Manual

5. Overview

Wind speed is measured by using a helicoid-shaped, four-blade propeller. Rotation of the
propeller produces an AC sine wave signal with frequency proportional to wind speed.
Vane position is transmitted by a 10 kΩ potentiometer. With a precision excitation voltage
applied, the output voltage is proportional to wind direction.
The R.M. Young Instruction Manual includes additional information on the operating principles,
installation, and maintenance of the sensor.
The wind monitors are manufactured by R.M. Young and cabled by Campbell Scientific for use
with our data loggers. Cable lengths for the wind monitors are specified when the sensors are
ordered. Table 5-1 (p. 5) gives the recommended cable length for mounting the sensor at the top
of the tripod/tower by using a CM200-series crossarm.
Table 5-1: Recommended cable lengths
CM106B CM110
4.2 m (14 ft) 4.2 m (14 ft) 5.8 m (19 ft) 7.3 m (24 ft) 4.2 m (14 ft) 7.3 m (24 ft) 11.3 m (37 ft)
NOTE:
Maximum cable length is 304.8 m (1000 ft).
CAUTION:
Do not use cable lengths greater than 30 m (9 ft) in electrically noisy environments.
Features:
Rugged enough for harsh environments
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Constructed with thermoplastic material that resists corrosion from sea-air environments
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and atmospheric pollutants
Ideal for wind profile studies
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Compatible with the LLAC4 4-channel Low Level AC Conversion Module, which increases
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the number of anemometers one data logger can measure
Compatible with Campbell Scientific CRBasic data loggers: CR6, CR3000, CR1000X, CR800
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series, CR300 series, and CR1000
CM115 CM120 UT10 UT20
Wind Monitor Series
UT30
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