Vaisala WMT700 Manuel d'utilisateur télécharger pdf (Page 39)

Chapter 4 _______________________________ Operating WMT700 in WS425 Analog Output Mode

VAISALA _______________________________________________________________________ 37

0212-038

Figure 11 Wind Speed Voltage Analog Output with WS425 Cable

and Adapter Cable for Analog Voltage Output

Wind Direction Output

When wind direction is measured, WMT700 sends analog output as

simulated potentiometer output voltage referred to as external reference

voltage. The output is a proportional signal 0 ... 100 % of the reference

voltage representing the wind direction. The reference voltage must be in

the range of 1.0 to 4.0 VDC (WMS425) or 0…10 VDC (WMT700). The

output is 0 VDC at zero degrees and increases to the reference voltage at

359 degrees.

Figure 12 on page 38 shows the output for wind direction. With

WMT700, the wind direction signal appears at pin 13 (gray), similarly to

the WS425 wind sensor.

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Vaisala WMT700 Manuel d'utilisateur Page 39