No Alarm - Xtrails ADPRO PRO-18 Planning And Commissioning Manual

Planning and Commissioning Manual
It is important to consider the wind load, especially if there are additional security features
such as CCTV cameras, LED lights etc., on the mast.
ADPRO PRO PIR detectors are light in weight and have a wind-resistant housing design,
and so offer little resistance to the wind.
5.5.1.2 Insufficiently Fixed Fences
In practice, one commonly occurring source of false alarms is barriers, that is, mechanical
fences themselves. These are often rarely serviced after a few years.
Due to weather, fences, in particular chain-link fences, become loose and start to sway in the
wind.
This generates noise signals, which are certainly compensated for by the ATD function, but
over time the performance capability of the system may lessen.
Therefore, make absolutely sure that any overhanging branches or foliage are removed.
Often plastic sheeting or bags are blown against the mesh, leading to noise signals.
5.5.1.3 Air Conditioners, Ventilation Shafts, Exhaust Pipes, Chimneys
As described in section 5.2.3, there is a range of environmental factors that can affect the
performance capability of the system. By appropriate placement most of these can be
avoided.
5.5.1.4 Walls and other Artificial Boundaries (Requirements)
Walls make ideal range boundaries. If there are no walls, stable, attached flagstones can be
useful.
The use of screens and tarpaulins is discouraged.
5.5.1.5 Logical Connection of Several Detectors
If physical separation is not possible, for aesthetic or financial reasons, this must be
considered in the planning and subsequent orientation of the detector.
First, attention must be paid to the areas where the monitored areas overlap considerably.
It can thus be sensible to connect to a burglar alarm system or safety management system.
It is simpler to use an appropriate detector.
See Section 14.1.2 IPT-Interactive Detectors.

5.5.2 No Alarm

In contrast to the false alarm, there can be no alarm, which impacts negatively on the quality
of a perimeter security system. Quite apart from the effects of the weather, as described in
section 5.2.3, errors in configuration and/or insufficient parameterisation can lead to a poor
detection rate.
5.5.2.1 Low Sensitivity
One reason for this can be that the detector sensitivity has been reduced too much, for fear
of too many false alarms, or because of the circumstances described in sections 5.2.1 and
5.2.2. In the event of, for instance, snow, rain or thick fog, even a perfectly calibrated system
might not be triggered if the signal strength is no longer sufficient or the alarm threshold is
too high. In this case the system must be adapted over time as a result of experience. One
possible measure is described in section 5.5.2.2.
5.5.2.2 A/B Alarm (double knock)
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ADPRO Passive-Infrared (PIR) PRO Series by Xtralis
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