3.4 Heating
WXT536 WXT535 WXT534 WXT533 WXT532 WXT531
✔ ✔ ✔ ✔ ✔
When operating the sensor in temperatures below 0 °C (32 °F), select a model with an
in
t
ernal heater and enable the heater for operation.
The heating elements located below the precipitation sensor and inside the wind
transduc
ers help keeping the sensors clean from snow and ice. A heating temperature (Th)
sensor underneath the precipitation sensor controls the heating. Note that Th is measured
inside the equipment, where temperature is much higher than the ambient temperature
(Ta).
The heating control tries to keep Th at +15 °C by adjusting the heating power. The heater
control switches heating resistors on and o based on heating voltage and Th.
Table 3 Heater Resistance
Transmitter model Heater resistance when Vh < 15 V Heater resistance when Vh > 15 V
WXT536, WXT535, WXT533,
WX
T532
15 57
WXT531 27
The instant current depends on the heater voltage. You must select the power supply with
the instan
t current in mind. The average heating power and heater performance do not
depend on the heating voltage.
When the heating function is disabled, the heating is o in all conditions.
Snow accumulation can cause temporary wind measurement problems even when
heating is enabled.
Mor
e Information
‣
Supervisor Mes
sage (page 13
2)
WXT530 Series User Guide M211840EN-D
30
sales@streamlinemeasurement.co.uk
www.streamlinemeasurement.co.uk
To Next Page
Loading...
Need help?
General
