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8. General notes on installation
• The front coverage lenses of the 'FS20 PIRI-2' are supplied with 4 detection levels with 9
upper, 8 middle, 5 lower and 2 creep zone segments. This enables a detection angle of 90°
to be achieved at a range of up to 12m.
• For additional security, the 'FS20 PIRI-2' is equipped with so-called 'creep protection' so
that an intruder cannot 'creep' under the detection area of the main lens. An additional
integrated lens is directed downward, under the main detection area.
This mini dome lens has 17 segments which cover an area of 3.75m x 3.75m when installed
at a height of 2m.
• In order to avoid unnecessary activation by household pets, keep them away from
protected areas when possible. If this is not possible, try adjusting the height to allow the
device appropriate coverage. Cover the creep zone where appropriate.
Please remember that household pets may also jump on, for instance, cabinets or chairs
and in so doing, arrive in the detection area. Choose a suitable installation location.
• To minimize false alarms, the PIR detector must not be installed where it may be exposed
to direct sunlight, car headlamps or similar, nor near heat sources (for example over
heaters).
The detection area should be aimed at a wall or on the floor, but not directly on windows,
heaters or other sources of heat.
• The performance of the detection is dependent upon the temperature difference between
the moving object and the respective background.
• Detection through glass is not possible (in that case, the IR sensor only recognises the
temperature of the glass).
• Please remember not to install the 'FS20 PIRI-2' directly on or near large metal objects
(heating, aluminium laminated board walls, etc.) because this reduces the radio range.
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