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Installation and Operating Instructions
NOTE
Fan unit ELS NFC..
Range and detection angle:
Fig.31
80°
vertical
100°
horizontal
Under ideal conditions up to approx. 5 m, horizontal 100°, vertical 82°, see
Fig.32. The temperature difference between the object and background
must be at least 4 °C. The lowest object speed is 0.5 to 1.5 m/s. The range
depends on the temperature difference, movement and speed.
The sensor cannot detect movement if it is covered, e.g. by shower cur-
tains or the like. If the object moves at the border of the measuring ran-
ge, it is possible that the object will not be detected.
The best detection coverage is achieved when the predominant movement
direction in the room is at a right angle to the sensor. There is an area in which
no objects can be detected directly in front of the Sensor (0°).
The following errors can occur during movement detection:
Other heat sources
― Animals
― Light sources with high IR proportion (e.g. sunlight, incandescent lamps,
etc.)
― Rapidly changing air temperature differences, which result from e.g. the
activation of air conditioning units, fan heaters or the like.
Other error sources
― IR filters in front of the sensor, e.g. glass or acrylic, absorb a proportion of
the thermal radiation, so that the objects may no longer be detected.
― If the heat source moves very rapidly or very slowly (see above), detection is
not possible.
1. Initial commissioning or after a power failure
Upon connection of the operating voltage or after a power failure, the sensor
will be in a stabilisation phase for approx. 1 min. No movements will be detec-
ted during the stabilisation phase.
27
EN
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