Selecting Alocation - FRIEDLAND SPECTRA 140 Manual De Instrucciones

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SELECTING A
LOCATION
Your PIR Detector has a number of
detection zones at various horizontal and
vertical angles, as shown. A moving
human body crossing or entering one of
the zones activates the Detector. Mount the
Detector at a height of 2.5m for the best
all-round coverage [Fig. 1]- it may be
positioned up to 4m high for a greater
detection range, but the detection pattern
will be less effective.
Careful positioning of the tilt and swivel
Detector head is needed to ensure optimum
performance. When performing the WALK
TEST [Section 4], the angle of the head
may require slight adjustment, particularly
when mounting your PIR Detector higher
than the recommended 2.5m.
Also note that the PIR Detector is much
more sensitive to movement ACROSS
its field of vision, [Fig. 2], rather than
movement directly toward it [Fig. 3]. So if
possible, mount the PIR facing ACROSS
the approach to your property.
Fig. 1
Fig. 2
False activation reduction technology
makes your PIR Detector less prone to
activation by wind, rain, moving branches,
etc, but care should be taken to avoid
siting near sources of heat - central heating
outlets, tumble dryer exhausts and extractor
fans, for instance. Under extreme conditions
branches and reflective surfaces such as
pools of water or white painted walls can
also be a problem. Wherever possible,
mount the PIR away from such sources of
interference [Fig. 4].
If an object such as a moving branch
repeatedly activates the Detector in normal
operation, masking the lens of the Detector
with the blanking strip provided or electrical
tape is a simple solution [Fig. 5]. By trial
and error, you will discover how much of
the lens to mask to blank out the problem -
note that the top half of the lens corresponds
to long range detection, the bottom half to
short range.
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Fig. 3