30 107026-11-EN FR26 ROW 302 Printed in France
5.2 Optical alignment
Emitter and receiver must be parallel and at the same
height.
- Check the units are parallel in the plane of the
beams.
The alignment tolerance between emitter and receiver
is ±2°.
2˚
- Check the units are parallel in the plane
perpendicular to the beams.
E
R
- Check the relative height.
This adjustment is easily accomplished by sliding in
the "T" grooves of the mountings.
The tolerance on relative heights is ±10 cm for a
scanning distance of 10 m, and decreases in respect
with E/R distance.
- Check the angular alignment.
E
R
2˚
2˚ 2˚
2˚
The angular position tolerance of emitter and receiver
is ≤ ± 2°.
For small scanning distances distances, the
alignment of the units can be carried out very
rapidly and simply using a rule:
Rule
E
R
For long distances the alignment can be achieved
using a bubble rule.
Reminder:
• Little irregular alignment results in flickering of
signal R1 with the signal R3 on.
• Excessively irregular alignment results in flickering
of signal R1 and in turning off the signal R3 and
set off the barrier outputs.
• When an occultation occurs, R1 may flicker (and
R2 turns on); this means that the receiver is still
scanning, but with a missing beam due to
occultation. If the occultation is made close to a
receiver lens, R1 lights on, withoutflickering, as
the receiver is no longer able to scan. Anyway, in
both cases, output relays will be switched off, as
there are missing beams.
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