Campbell Scientific 27106T Gill Propeller Anemometer - Manual (Page 9)

27106T Gill Propeller Anemometer
4. Wiring
Connections to Campbell Scientific dataloggers are given in Table 4-1. When
Short Cut for Windows software is used to create the datalogger program, the
sensor should be wired to the channels shown in the wiring diagram created by
Short Cut.
TABLE 4-1. Connections to Campbell Scientific Dataloggers
Color
Wire Label CR800
CR850
CR5000
CR3000
CR1000
CR510
CR500
CR10(X)
21X,
CR7
CR23X
CR200(X)
White Signal SE Analog SE Analog SE Analog SE Analog
Black Signal Reference G
Clear Shield
5. Programming
This section is for users who write their own programs. A datalogger program
to measure this sensor can be generated using Campbell Scientific’s Short Cut
Program Builder software. You do not need to read this section to use Short
Cut software.
In CRBasic, wind speed is measured by the VoltSE instruction. Dataloggers
that use CRBasic include the CR200(X) series, CR800, CR850, CR1000,
CR3000, CR5000, and CR9000(X).
In Edlog, wind speed is measured by the Volt (SE) (P1) instruction.
Dataloggers that use Edlog include the CR500, CR510, CR10(X), 21X,
CR23X, and CR7.
5.1 Wind Speed Multiplier and Offset
The expression for wind speed (U) is:
U = MX + B
Where,
M = multiplier
X = voltage measured by the datalogger
B = offset
Table 5-1 lists the multipliers to obtain miles/hour, meters/second, km/H, and
knots. The helicoid propeller has a calibration that passes through zero, so the
offset is zero.
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