Vaisala WMT700 - Manual (Page 29)

Chapter 2 ___________________________________________________________ Product Overview
Analog Output Signal for Wind Direction
Channel
Ordering option 8 defines Analog Output Signal for Wind
Direction.WS425 Potentiometer output is backward compatible
when replacing WS425 with a WMT700 unit. For different wind
speed and direction representations, see Figure 13 on page 39.
Note that the wind direction offset must be 0 for the for the
readings to correspond with Figure 13.
Table 12 Analog Output Signal for Wind Direction
Selection Output Configuration
0 Disabled
A Voltage output 20 mV/degree
0 mV = 0 degree
7200 mV = 360 degree
B Reserved for future use
C Reserved for future use
D Current output 50 uA/degree
0 uA = 0 degree
18 mA = 360 degree
E Current output 4…20 mA (44.444 uA/degree)
4 mA = 0 degree
20 mA = 360 degree km/h
F WS425 Potentiometer output
0% of V
ref
= 0 degree
100% of V
ref
= 360 degree
Connection Cables
Ordering option 9 defines connection cables. There are several
different cables of different lengths for different purposes, as
shown in Table 13 on page 28.
VAISALA ________________________________________________________________________ 27