Distance from reflective surfaces
The presence of reflective surfaces close to the light curtain may cause occasional
reflections that prevent sensing. Referring to Figure 8, object is not detected due to
surface that, reflecting the beam, closes the optical path between the Emitter and
Receiver. Therefore, a minimum distance d must be maintained between any
reflecting surfaces and the guarded area. The minimum distance must be
calculated according to the distance between the Emitter and Receiver and taking
into account that the angle of projection and reception is 4°.
Figure 8 - Reflective surfaces
The distance to be kept as the distance between Emitter and Receiver varies is shown
in Picture 9.
Figure 9 - Minimum distance d
After installing the system, check for any reflective surface that intercept the beams, first
of all at the centre and then close to the Emitter and Receiver. During this procedure, the
red led on the Receiver must never switch off.
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