Vaisala WXT510 - Manual (Page 38)

User’s Guide ______________________________________________________________________
36 __________________________________________________________________ M210470EN-D
In most occasions the average consumption is less than 10 mA.
Typically, the higher the voltage the lower the current, but with voltages
above 18 V the current will gradually increase, adding to the usual
consumption an extra 4 mA at 24 V (see
Figure 14 on page 36 ).
0505-202 Figure 14 Average Operational Current Consumption (with
4Hz Wind Sensor Sampling)
Heating voltage Vh+ (one of the following three alternatives):
- 5 ... 30 VDC;
- AC, max V
peak-to-peak
84 V (= 30 V
RMS
); or
- Full-wave rectified AC, max V
peak
42 V (= 30 V
RMS
).
The recommended DC voltage ranges are as follows:
- 12 VDC ± 20 % (max 1.1 A);
- 24 VDC ± 20 % (max 0.6 A).
At approximately 16 V heating voltage level WXT510 automatically
changes the heating element combination in order to consume equal
power with 12 VDC and 24 VDC supplies. Input resistance (R
in
) is
radically increased with voltages above 16 V (see the following graph).
The recommended ranges for AC or full-wave rectified AC are:
- 68 V
p-p
± 20 % (max 0.6 A), for AC;
- 34 V
p
± 20 % (max 0.6 A), for f/w rectified AC.