PIR-045
PASSIVE INFRARED DETECTOR
2800-00006 Page 3 of 10
Typical horizontal alignment of PIR-045
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-
045 by increasing the alarm threshold level and may lead to unwanted alarms.
Top view
45 m
4 m
Fig. 2
•
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).
Sensitivity Settings
The various settings of the PIR-045 are made by means of multiple DIP - switches on the connector board.
The
DIP – Switches 1 and 2
are for
sensitivity setting
depending on the required detection performance. If the maximum
required range is less than the nominal range of the detector, it is recommended to reduce the overall sensitivity to reduce
nuisance alarms.
*) With the DIP - switches 1 and 2 both set to „on“, the overall sensitivity is 100% factory setting but can be changed with the
installation software (see annex 3 for details).
If the sensitivity is adjusted with the installation software, the programmed value will remain active also following a power
off.
Operation of the PIR-045 with overall sensitivity set to more than 100% is not recommended in outdoor applications as
the nuisance alarm rate could increase significantly.
Switch
Overall
1 and 2
Sensitivity
off – off
40 %
off – on
75 %
on – off
100 %
on – on
Software Settings
*) 20 … 140 %
