Vaisala WINDCAP WMT700 Series - 3.9 Heating

Aout2 Selected
Option
Scaling/Gain Oset Error Indication Example
Current 0 … 20 mA 0.00005 A/° 0 A 0.022 A 0 mA = 0°
18 mA = 360°
Current 4 … 20 mA 000044444 A/° 0.004 A 0.002 A 4 mA = 0°
20 mA = 360°
Potentiometer
(WS425)
1/359*Vref /°
(0.0027855)
0 Vref
(1)
0 V = 0°
Vref = 359°
For a dierent scaling, change the gain and oset settings.
The scaling of the current output 4 … 20 mA depends on the sensor measurement range
(WMT701, WMT702, WMT703, or WMT704), while the 0 … 20 mA output has 0.2 mA/m/s
scaling for all the measurement ranges.
The following tables list the most common settings for dierent units.
Table 20 Common Transfer Function Settings for Aout1 (WS)
Output Signal Scaling/Units Setting for Gain Setting for Oset
Voltage 8 mV/mph
100 mV/m/s
0.017895
0.1
0
0
Current 0.2 mA/m/s 0.0002 0
Frequency 5 Hz/mph
10 Hz/m/s
11.185
10
0
WS425 - voltage 8 mV/mph 0.017895 0
WS425 - frequency 5 Hz/mph 11.185 0
Table 21 Common Transfer Function Settings for Aout2 (WD)
Output Signal Scaling/Units Setting for Gain Setting for Oset
Voltage 4 mV/°
20 mV/°
0.004
0.02
0
0
Current 50 uA/degree 0.00005 0
Potentiometer 359° = Aout ref 0.0027855 0
WMT700 User Guide M211095EN-H
46