
C-BUS TRAINING MANUAL - VOL 2
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4.3 Target
There are two values which determine the level at which the sensor responds to a change in ambient
lighting levels:
• Target Lux — the threshold lux level below which any “Light Level” or “Light On/Off” group
is activated. When used with dimmers you can think of this as the level of lighting that
you would like to maintain.
• Margin — the level of variation from the Target Lux level at which the threshold operates.
This can be used to prevent constant switching of relay levels when the ambient light level
varies regularly (perhaps due to passing clouds). It means that a “Light On/Off” group can
be set to turn on at a level below the Target Lux, and turn off at a level above the
Target Lux.
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