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GeoZone 'A' Perimeter Security System
Installation Manual
15 Fault Finding
The following lists indicate a number of possible problems and methods of overcoming
these problems. Fault finding on GeoZone systems can be separated into two main
categories as shown below.
15.1 Installation Related Problems
Symptom
Apparent lack of response
when testing or
commissioning the system
Variation in response to
test impacts on the same
zone
Excessive false alarm rate
under bad weather
conditions
False alarms occur at
regular intervals.
15.2 Sensor Related Problems
Symptom
Analyser indicates tamper
fault
Page 34
Possible Cause
Inadequate coverage of
protected area caused by
wide spacing of sensor
runs
Sensor installed on
different types of fabric on
the same zone
Large variation in tension
of fence panels
Internal damage to sensor
during installation
Loose or vibrating sections
of fence fabric, signs,
gates, or outriggers and
topping. Vegetation or tree
branches brushing against
fence line
Operation of gates at
regular times as
employees arrive or
depart. Animal activity on
fence line
Possible cause
Sensor damaged,
incorrectly connected to
analyser, or incorrectly
terminated
Remedy
Increase number of sensor
runs to comply with
recommended installation
requirements
Ensure that sensor is
installed only on one type
of fabric per zone
Tighten up excessively
loose panels of fencing
Contact Geoquip
Worldwide for further
advice
Locate problem area and
tighten up loose sections or
cut back vegetation and/or
tree limbs
Isolate gates from main
protected zones using gate
by-pass switches.
Investigate fence line for
rabbit or fox burrows
Remedy
Remove sensor from
analyser terminal block and
insert a 1kΩ resistor across
the terminals. If the fault
persists, return the
analyser for repair. If it
clears, reconnect the
sensor and carry out
insulation and continuity
tests
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