Trilux LiveLink LightGrid, Instruction Manual

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8
Daylight-dependent control
It is important for the function of daylight-dependent control that light
sensors or combined presence and light sensors are positioned in suit-
able locations. The sensor should be positioned in the area of the visual
task.
• For large visual task areas, the sensor should be positioned in
such a way to take into account the part of the area least supplied
with daylight.
• If there are several work areas arranged in the room with very
different daylight supply levels, the work area with the lowest level
of daylight must be taken into account. For higher energy savings,
independent control areas can be set up with separate light sen-
sors.
• The measured surface below the sensor should have a medium
reflectance value and should reflect diffusely (not specular).
• The sensor must be positioned so that no interfering light falls
on the measuring surface (e.g. direct light on windowsill, see the
diagram).
• No objects should be placed on the measuring surface that impair
the measurement, such as pallets, tall pieces of furniture or large
objects with varying reflectance values.
Sources of interference
Avoid positioning near the following sources of interference:
• Heat sources influence the measurement of passive infrared sen-
sors (PIR). Maintain sufficient distance to the heat sources. This
applies to e.g. fan heaters, open doors and windows, pets, light
bulbs/halogen spotlights and moving objects.
• Sources of light interference such as luminaires whose indirect
light component shines directly on the sensor
• Daylight reflections e.g. from mirrors
• Radio- or Wi-Fi transmitters at a distance of approx. 1 metre
SYSTEM AND FUNCTIONS