Polar Diagram - ABB i-bus KNX Product Manual

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ABB i-bus KNX
2.2.4

Polar diagram

© 2008 ABB STOTZ-KONTAKT GmbH
Device technology
The Light Sensors include two light rods. The white fibre-optic rod has a
smaller detection range and is less sensitive to lateral lighting influences.
This rod can be used if the detection range has to be limited as the reflected
light may be influenced, for example, by window sills, which affects the large
reference area of the clear fibre-optic rod.
Note
Please note that the white rod may not be subject to direct sunlight,
artificial light or reflections. This leads to a direct misinterpretation of the
brightness in the reference area and thus to incorrect constant lighting
control.
Light Sensor with transparent rod
Ceiling
The diagrams show the light sensitivity of the sensors in the room.
The percentage values refer to the maximum sensitivity of the Light Sensor.
Light Sensor with white coating
Ceiling
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