Immunity To False Light - Siemens 5TC1 Series Bedien-Und Montageanleitung

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5.3.1 Immunity to false light

The detector's high immunity to false light ensures
§ that the motion detector attachment 'Komfort ' will not
interpret the brief flash of light, for instance from a torch, as
'brightness threshold exceeded' and thus be prevented from
switching in spite of movements. In other words, the motion
detector cannot be hindered from switching by a brief flash
of light directed towards the lens.
§ that the motion detector attachment 'Komfort ' will not
interpret unintentional brief shading, for instance by a
person, as 'brightness below preset level' and thus switch
because of detected movements.