Vaisala WS425 - Manual (Page 37)

Chapter 4 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 37
NOTE The wind speed voltage output cannot be used simultaneously with the
frequency output. If the voltage output pin 15 is used, the frequency
output pin 14 must be connected to ground, see Figure 10 on page 36.
Wind Direction
The DC reference voltage that inputs the sensor at pin 12, produces a
voltage that represents the wind position. The reference voltage must be
in the range of 1.0 to 4.0 VDC. The output at pin 13 is 0 VDC at zero
degrees and increases to the maximum input voltage at 359 degrees.
0212-040
Figure 11 Analog Connection
Missing Readings
For analog outputs, the wind speed is set to 125 mph when a reading is
missing.