Technical data

8.4.2.
8.4.1.
8.
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No direct light must reach the sensor. Direct light from
the window must be avoided as must light radiated
upwards by, for example free standing or suspended
direct / indirect luminaires. Sensors are in fact best
installed at the same height as the luminaires.
Since the working plane serves as a reflecting surface, it
should be used as a reference for the entire room and
should not be subject to fluctuations in its reflection
factor. It is, for example, not advisable to fit the light
sensor directly above a light-coloured floor which is
occasionally used for storing dark coloured goods.
Figure 22: Sensor fitted above areas with consistent reflective
properties.
Light sensor recording range
The design of the latest light sensors has been matched
to the needs of modern office work spaces.
Figure 23: Light sensor sensitivity.
Light regulation with lateral windows
Regulation close to windows
As a general rule, daylight-controlled regulation is
effective to a depth in the room which corresponds to
approximately twice the height of the window. In office
areas with usual dimensions, this distanced will be some
3 to 5 m.At points further from the windows, the
penetration of natural light will be too low to be useful
as a component of the overall illuminance for working. In
case of doubt, a comparative measurement between the
indoor and outdoor illuminance will help. If the different
is less than 1%, regulation will not be worthwhile.
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