Prism Targeting - Menvier Security MAB50R Installation Manuals

Ensure that there is a clear line of sight to the Detector, taking care that no moving objects i.e. doors,
mechanical lifting equipment etc, will interfere with the beam path between the Detector and Prism.
Note: On ranges of ≥5 metres and ≤50 metres use a MAB50R.
On ranges of >50 metres and ≤100 metres use a MAB100R.
5. Prism Targeting Mode.
Apply power to the Detector. There is a 5 seconds pre-charge delay after power is applied to allow the internal
circuits to stabilise correctly.
Do not remove the detector from the wall during this action.
Using the mode switch (See fig. 4) select Prism Targeting Mode (Switch will be in the up position). At this time
there may be a fault condition showing on the panel.
Find the prism by adjusting the horizontal and vertical thumbwheels until the Amber LED is flashing. Both the
Red and Amber LED will be OFF when no signal is being received. The Red LED will start to flash when a weak
signal is received. When a stronger signal is received, the Red LED will extinguish and the Amber LED will start
to flash.
•
At this point it is essential to test that the prism and not another surface is
reflecting the beam
This can easily be confirmed by covering the prism with a non-reflecting surface and confirm that the AMBER
and RED indicators are OFF. Please read this in conjunction with section 10.
6. Alignment Mode.
Mechanical alignment is provided by two adjustment thumb wheels on two sides of the Detector, positioned just
behind the Detector Head cover. Adjustment is achievable in both axes.
6.1. Enabling Alignment Mode.
Do not remove the detector from the wall during this action.
Using the mode switch (See fig. 4) select Alignment Mode (Move switch to the middle position). At this time
there be may a Fault condition showing on the panel.
6.2. Adjustment in Alignment Mode.
The Detector will automatically adjust its infrared beam power and receiver sensitivity to give an optimum
receiver signal strength.
The alignment progress is indicated by the colour and state of the indicator lamp on the front of the Detector.
•
FLASHING RED
The Detector is receiving too much signal and is attempting to reduce the infrared power output to
compensate. Wait at this point until the indicator lamp is OFF, this may take up to 20 seconds depending
on the distance between Detector and Prism, the shorter the distance the longer the time.
•
FLASHING AMBER
The Detector is receiving a weak signal and is attempting to increase the infrared power output.
•
OFF
The Detector has optimised the infrared power and receiver gain for the current orientation of the Detector
and Prism. This does not mean that the Detector to Prism alignment is at its optimum, i.e. if the power
is too high, a misaligned Detector may be receiving a fringe reflection from another object.
•
FLICKERING RED/AMBER
This state can occur sometimes. It means that the infrared power is stepping through the optimum setting.
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Continue to flow diagram for procedure.
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