Campbell Scientific RAWS-P Remote Automated Weather Station - Manual (Page 17)

RAWS-P Remote Automated Weather Station
Consult the CS300-L manual for more information. NOTE
4.4 Wind Speed and Direction
4.4.1 Wind Sensor
4.4.1.1 General Description
The Met One Wind Sensor (pn 034B-LQ) is an integrated cup anemometer and
wind vane. The anemometer consists of three cups that sense the wind speed.
These cups rotate on a vertical shaft that magnetically activates a sealed reed
switch. The reed switch opens and closes at a rate proportional to wind speed.
The wind direction is sensed by a vane. The vane drives a 10 k
Ω
potentiometer. The wind speed sensor outputs a pulse. The wind direction
sensor outputs a voltage.
4.4.1.2 Wiring
The 034B-LQ attaches to the connector labeled WS/WD; this connector is
color coded red. The sensor is internally wired from the RAWS connector
panel to the CR1000 datalogger.
TABLE 4-4. WS/WD Connector (color coded red)
Connector Pin Description CR1000 Terminal
A Sensor Ground
B Wind Direction Excitation VX2
C Wind Direction Signal 2H
D Power Ground G
E +12 V Power 12V
F Wind Speed Signal P1
4.4.1.3 Troubleshooting
If a problem is suspected, check the sensor cable. Disconnect the connector
and look for damaged pins. Verify free movement of the cup anemometer and
wind vane. Try connecting a substitute sensor. Obtain an RMA number before
returning this sensor to Campbell Scientific for repair.
Consult the 034B-L manual for more information. NOTE
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