Thies CLIMA 5.4110 00 Series, Instructions For Use Manual

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4.1 Heating
All sensor variants have heated glass panes on both heads to prevent interferences through freeze
up, steaming up or similar. The heating power is controlled in subject to the ambient conditions.
The heating current are measured for self diagnostic and could be read through the diagnostics
command (“DD”, only available with PCB Rev.B, see
Figure 6) .
4.1.1 Variant Extended Heating (5.4110.x1.xxx)
In addition to the two glass pane heatings this variant has 3 heating circuits to prevent against
malfunction due to icing and packing of snow:
1. Housing (top side)
2. Heads (under the stainless steel components)
3. Carriers (straight section of the carriers at the receiver head)
This three heating circuits are controlled separately against the ambient temperature (ambient
temperature sensor, see also
Figure 6 ). The heating power varies from 10% to 100%. The
heatings are switched on from a measured temperature under 3°C.
Whether the respective heating circuit is switched on, can be checked by observing the
corresponding red LED on the Heating-Control-PCB (
Figure 6.
The heating currents and the supply voltage of the heating are measured for self diagnostic and
could be read through the diagnostics command (“DD”).
With the commands „HK“, „HB“ and “HG” (see Ch. 7.2.5 ) you can individually switch on a heating
circuit for one minute for testing.