Vaisala PTB210 SERIES Manuel d'instructions Page 19

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The control system of the BGC-FTIR-Container processes this event for further
steps concerning the protection of the solar tracker.
Figure 2.7: Sensors Light Barrier System
[Manual - Electronic Precipitation Indicator 15153, 1/07]
A built-in incidence-filter smoothes the triggering of swiching signals in case of
individual incidences, as for example leafs, bird droppings, insects etc. For this, a
certain number of at least "n" incidences should have occured within a time-frame
of 50 seconds. The number of drop incidences (1...15) can be selected through the
DIP switch on the circuit board. For details please see [16]. When precipitation
ends, the switching signal is reset after a selectable switch-off delay.
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