Checking that a clear line of sight can be obtained, between the TX & RX
units and that the beam path is not ‘bouncing off’ any adjacent/reflective
surfaces.
Once the optimum alignment voltage has been achieved, the operation of
the units should be tested at intervals along the detection zone length.
As the beam path is interrupted / blocked, the associated RX should trip to
an alarm condition (relay change state), and the alarm LED should indicate
accordingly.
BASIC TROUBLE SHOOTING
At certain points along the beam path, the beam can be blocked/interrupted
without generating an alarm condition.
Check for a bounced beam path from an adjacent object / reflective surfaces
and realign.
Receiver is in an alarm condition and ‘Alarm LED’ is permanently ‘ON’
although alignment voltage is good.
Check position of receiver (RX) switch ‘S1’. For a synchronised system the
switch should be ‘ON’, for an unsynchronised system the switch should be
‘OFF’.
Check synchronisation cable /connections (if applicable).
No alignment voltage can be obtained at the receiver (RX), LED is ‘ON’
Check that the transmitter is switched ‘on’ via switch ‘S1’ to right of TX
terminal block.
Check supply voltage at TX and RX terminal 1 & 2 are within tolerances of
spec.
Check alignment operation and if still no alignment voltage, remove TX and
introduce in front of RX to test beam set operation (a battery may be used to
temp. power the TX).
Check operational distance is within specification and that glass aperture in
housing is clean.
