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Alignment
Copyright 1996 WARNING-Opto-Elektronik GmbH & Co Produktions KG
changes reserved
8
4 Alignment
A red LED has been attached as auxiliary alignment to the receiver which extinguishes by incident IR
beam. For alignment the mirrors can be adjusted horizontally approx.
±
95° and vertically
±
10°. During
the alignment procedure they have to be moved very carefully and sensitively.
incorrect alignment correct alignment
Luminous spot
IR-transmitter diode
alignment via alignment searchlight
For pre-alignment of the transmitter and
receiver an ordinary light source (alignment
searchlight or incandescent bulb) can be
applied. Therefore the light-source is fixed
at the receiver res. transmitter at the same
level of the mirror and directed to the
opposite side. Now the mirror at the
transmitter and/or receiver can be displaced
until the light-beam bundled through the
lens (appearing as luminous spot on the
yellow surface) arrives exactly in the middle
of the IR-transmitter and/or IR-receiver
diode.
For precision alignment of the receiver the alignment control device (available as accessory in a grey
coloured boxing)or an oscilloscope can be adapted to the test points (signal and GND) provided
therefore. The alignment correct as soon as a maximum of LED’s appears on the alignment control
unit.
LED-indicator Evaluation of alignment indicator
1 LED insufficient incident IR-energy
(re-adjust transmitter)
2-3 LED
barely sufficient IR-energy
4-5 LED
well-sufficient IR-energy
6-8 LED
excellent IR-energy
alignment
oscilloscope
2V DC / 100us
GND
test point for
alignment control unit
resp. oscilloscope
Jumper for
alignment of
alarm response
sensitivity
J1
J2
J3
SIG
alignment with oscilloscope
The alignment can also be checked by means
of oscilloscope which must be connected to the
receiver at the test point (SIG) and minus
potential (GND).
The number of impulses on the oscilloscope is
corresponding with the number of LED’s on the
alignment checking device.
Alignment control unit
1 2 3 4 5 6 7 8
9


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