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Passive Infra-Red (PIR) Movement Detectors
PIR Detectors are designed to detect movement
in a protected area by detecting changes in
infra-red radiation levels caused, for example,
when a person moves within or across the devices
field of vision. If movement is detected an alarm
signal will be triggered, (if the system is armed).
Note: PIR Detectors will also detect animals, so
ensure that pets are not in areas fitted with PIR
Detectors when the system is armed.
ny number of PIR Detectors can be used with
your system providing they are all coded with the
system house code, and are mounted within
effective radio range.
The PIR Detector is powered by a 9V PP3 alkaline
battery.
Under normal operating conditions this
will provide an expected life in excess of 1 year.
When the battery level becomes low the PIR
Detector will flash a red LED behind the lens.
When this occurs the battery should be replaced as
soon as possible.
Positioning the PIR Detector
The recommended position for a PIR Detector is in
the corner of a room mounted at a height of between
2 and 2.5m.
t this height, the PIR Detector will have
a maximum range of up to 12m with a field of view
of 110°.
Top View
2
0
12
10
8
6
4
2
0
metres
Side View
More Sensitive
12
10
110°
10
12
metres
Less Sensitive
The position of the PCB inside the PIR can be set to 5
different positions to adjust the range of the PIR
Detector. Setting the PCB in position 3 will reduce the
range to 9m approximately, with position 1 providing
a range of 6m approximately.
position setting for the PCB is in position 5.
Note: The range as indicated above refers to the
linear distance in front of the PIR Detector.
When deciding upon the mounting position for the
PIR Detector the following points should be
considered to ensure trouble free operation:
1. Do not position the PIR Detector facing a
window or where it is exposed to or facing
direct sunlight. PIR Detectors are not suitable
for use in conservatories or for external use.
2. Do not position the PIR Detector where it is
exposed to draughts.
3. Do not position the PIR Detector directly above
8
a heat source, (e.g. fire, radiator, boiler, etc).
6
4
4. Where possible, mount the PIR Detector in the
2
corner of the room so that the logical path of an
0
2
intruder would cut across the fan detection
4
pattern. PIR Detectors respond more effectively
6
to movement across the device than to
8
movement directly towards it.
5. Do not locate the PIR Detector in a position
where it is subject to excessive vibration.
6. Ensure that the position selected for the PIR
Detector is within effective range of the System.
Note: When the system is armed, pets should
not be allowed into an area protected by a PIR
Detector as their movement will trigger the PIR
and generate an alarm.
10
The recommended
5
PCB Positions
4
Indicator
3
(positions 1-5)
2
1
PCB Position
Range
1
6m
3
9m
5
12m
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