Vaisala WXT520 - Manual (Page 46)

User’s Guide ______________________________________________________________________
44 __________________________________________________________________ M210906EN-C
proportion to the sampling rate, since wind measurement is the most
consuming operation in the system.
In most occasions the average consumption is less than 10 mA.
Typically, the higher the voltage the lower the current (see
Figure 20 on
page 44 ).
0805-023 Figure 20 Average Operational Current Consumption (with
4Hz Wind Sensor Sampling)
Heating voltage Vh+ (one of the following three alternatives):
- 5 ... 32 VDC;
- AC, max V
peak-to-peak
84 V; or
- Full-wave rectified AC, max V
peak
42 V.
Typical DC voltage ranges are as follows:
- 12 VDC ± 20 % (max 1.1 A);
- 24 VDC ± 20 % (max 0.6 A).
Maximum heating power is achieved at voltages 15.5 V and 32 V.
Nominally at 15.7 V heating voltage level WXT520 automatically
changes the heating element combination in order to consume equal