PIR-045
PASSIVE INFRARED DETECTOR
2800-00006 Page 6 of 10
Maintenance
The detector has been designed to be virtually maintenance free but the following precautions are recommended:
1)
Visual inspection of the front window
for accumulation of dirt on the outer surface or damage at intervals of app. 6
months. Clean the surface with a paper tissue and avoid rubbing dirt into the surface. Use the same precautions as for
a camera lens.
2)
Visual inspection of the inside
for ingress of water is recommended at intervals of 6 to 12 months or whenever the unit
is opened for adjustments or tests. Make sure that the sealing gasket is in place before closing the cover tightly again.
3)
Inspection is recommended following extreme conditions
such as snow storms, sand storms, hail etc. to make sure
that nothing has been damaged and the sensitivity is not reduced by accumulation of snow, sand or dirt on the front
window. Snow or dust in front of the window should be removed by hand or by using of a soft instrument (e.g. a wooden
stick).
General Comment on the PIR-045
•
Despite the advanced design and state-of-the-art features of the PIR-045 it is in the nature of a Passive Infrared Detector
that an absolute detection probability and freedom from nuisance alarms cannot be achieved,
masking of the PIR-045
cannot be excluded
.
•
Detection is a function of thermal contrast, speed and size of a target crossing the field of view. Contrast conditions can
vary significantly in the course of the day and year.
•
Detection depends also on the sensitivity settings, the exact aiming and the prevailing weather conditions as well as the
nature of the target and background.
•
The detection pattern and frequency response of the
PIR-045
has been optimised for the detection of human size targets
crossing the field of view in an upright position at speeds in the range of 0.2 … 5.0 m/s.
•
Detection of slow moving targets at long range may become uncertain under weak contrast conditions. It is strongly
recommended to limit the zone length to less than the nominal range when human targets moving at the minimum
specified speed need to be detected with high probability.
•
Animals or crawling people may or may not be detected depending on their size, speed, contrast and distance from the
PIR-045
.
It is therefore strongly recommended to combine the PIR-045 with an alarm verification such as CCTV or a second system
using other physical means of detection (e.g. VMD).
Any liability for direct or indirect damage resulting from the use of the PIR-045 as a detection device is explicitly disclaimed.
The information in this product manual is based on testing of samples taken at random from production and believed to be
representative, E&OE.
