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DETECTION RANGE
A PIR's detection range depends upon the size and temperature of a moving object.
A large and very hot object can be detected at very long distances.
The external PIR is also subject to Extremes of Heat, Cold, Bright sunlight etc. So the
detection range will be greater when the background is cold and less with Bright
sunlight reflecting off background objects.
The 4095 has a nominal detection range of 30 metres. This can reduce to 20 metres
with a bright sun lit background and extend to 40 metres with a dark background.
Vehicles may be detected at a distance of greater than 50 metres.
Side view
Plan view
4195-GB & 4695-GB
DUAL EXTERNAL PIR
This detector is designed for outside use
and employs two narrow angle PIR
detectors one above the other.
Both beams must be triggered to generate
an alarm. Small animals may trigger the
lower beam, but will not cause an alarm.
Like wise the detector is unlikely to be
triggered by Birds, insects or small wind
blown objects..
Page 1 of 8
CI-247_03
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Related Manuals for FM Electronics 4195-GB
Summary of Contents for FM Electronics 4195-GB
- Page 1 4195-GB & 4695-GB DUAL EXTERNAL PIR This detector is designed for outside use and employs two narrow angle PIR detectors one above the other. Both beams must be triggered to generate an alarm. Small animals may trigger the lower beam, but will not cause an alarm.
- Page 2 LOCATING THE PIR Ensure that the PIR does not look out over neighbouring property or onto the Highway. Vehicles at a considerable distance can trigger the PIR. In this example there are three locations shown to detect someone entering the property and approaching the House.
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Page 3: Sunrise & Sunset
ORIENTATION The PIR should not point directly East or West if the rising or setting sun will be seen by the PIR. North South orientation is the only all year round safe direction. If there is a nearby building or object which shades the setting sun it is O.K. provided the PIR is shaded before the sun gets below 15 degrees. -
Page 4: Mounting Height
MOUNTING HEIGHT Fix the wall bracket at a height of 1.5 metres for maximum detection range, 1.25m for optimum detection, where 20m or less is required. (Threaded hole in bracket at the top) The mounting surface must be rigid and free from vibration. The minimum dimensions for a wooden support is a 3”... - Page 5 300mm COMPENSATING FOR SLOPING GROUND If the ground is sloping, the PIR must be tilted accordingly by fitting packing pieces at the top or bottom edge of the mounting bracket. Example: The ground falls away 300mm at a distance of 10m. Page 5 of 8 CI-247_03...
- Page 6 The following chart shows that 300mm at 10m represents a slope angle of approx. 1.7 degrees which requires 10mm of packing at the top of the mounting bracket. Rise / Fall Packing mm Angle Distance at end of degrees mm at 10m bracket 1,067 Rise / Fall at 30 metres...
- Page 7 FIXING AT A GROUND SLOPE ANGLE WHEN THE DETECTOR WILL ALSO BE ROTATED SIDEWAYS This will results in the detector ending up tilted to one side. To overcome this, loosely fix the detector with one central fixing, rotate the detector to the desired direction.
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Page 8: Walk Testing
The detector will continue to work at 100% performance for two months after a low battery is indicated. South Walk, Vantage Point Business Village, Mitcheldean, Gloucestershire, GL17 0DD Tel. 01594 827070 email. sales@fmelectronics.co.uk www.fmelectronics.co.uk FM Electronics is the Manufacturing division of FM Security Ltd Page 8 of 8 CI-247_03...