Campbell Scientific 03001-L R.M. Young Wind Sentry Set - Manual (Page 11)

R.M. Young Wind Sentry
Wind Speed Wind Direction
5. Example Programs
This section is for users who write their own programs. A datalogger program
to measure this sensor can be created using Campbell Scientifics’ Short Cut
Program Builder software. You do not need to read this section to use Short
Cut.
5.1 Wind Speed
Wind speed is measured with the Pulse Count instruction, and with the low
level AC configuration. For dataloggers programmed with Edlog, specify
configuration code 21 to output frequency in Hertz.
The expression for wind speed (U) is:
U = MX + B
where
M = multiplier
X = number of pulses per second (Hertz)
B = offset
Table 5-1 lists the multipliers (M) and offsets (Off) to obtain meters/second or
miles/hour when the Pulse Count instruction is configured to output the result
in Hz.
TABLE 5-1. Wind Speed Multiplier
(With Configuration Code 21*)
Model Meters/Second Miles/Hour
03001 / 03101 M = 0.750
Off = 0.2 M = 1.677
Off = 0.4
*When configuration code 11 is used, the multiplier above is
divided by the execution interval in seconds.
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