PIR-018
PASSIVE INFRARED DETECTOR
2824-00005 Page 3 of 10
Typical horizontal alignment of PIR-018
Horizontal alignment should be done in a way to avoid unwanted signals being generated by targets (branches, bushes,
fences) likely to be moved by wind (see Fig. 2 below). Movement within the field of view will reduce the sensitivity of the PIR-
018 by increasing the alarm threshold level and may lead to unwanted alarms.
Top view
10 m
5 m
0
10 m
5 m
0
5 m
10 m
20 m
15 m
15
m
15
m
Fig. 2
Note:
The detection patterns of Fig. 1 and 2 are for illustration of the volumetric coverage of the detectors. Actual detection
zones depend on the mounting height and exact alignment.
•
When walk testing the unit, the threshold level will increase as a result of the signal generated by the target and
decrease exponentially in time after the event. To make sure that original sensitivity is reached, wait at least for 3
minutes between each crossing or disable the ATD function by setting DIP - Switch 3 to „off“.
If the Installation software is used for monitored walk tests and the DIP – switches 1 and 2 are set to software settings (on –
on), the nominal threshold level can be reset by pressing
[n]
. Alternatively the threshold level can be kept to its minimum
value by changing the configuration of the ATD for this test (see annex 3 for details).
