Introduction; General; Principle Of Operation; Fundamentals Of Perimeter Protection - Geoquip GeoZone A Installation Manual

1 Introduction

1.1 General

The GeoZone 'A' system is a simplified advanced perimeter intrusion alarm system
based on a microphonic sensor. The sensor is attached to the perimeter fence and
detects intruders attempting to climb over or cut through the fence.
The GeoZone 'A' family comprises:

The GeoZone 'A' analyser.

The GDALPHA sensor cable.

GQCOMBO end-of-line termination box.
On manned sites the alarm and tamper outputs can be connected to third party alarm
panels or our multi-zone annunciator (part numbers GW6ZA and GW12ZA). These
provide zone disable facility and led indication of alarm status. See QA427 Multi-Zone
Annunciator Operation Manual for details of the annunciators.
There are four stages to the installation of the GeoZone 'A' system.

Install the sensor cable.

Install the analyser.

Install the end-of-line box.

Install the service cable.

1.2 Principle of Operation

The GDALPHA sensor detects the vibrations caused by an attempted intrusion as the
perimeter fence is either cut through or climbed over and converts them into electrical
signals which are processed by an analyser. This, in turn, decide whether the signals
constitute an attempted break-in and, if so, an alarm signal is activated. The relay
output is normally connected to some form of annunciator unit which, in turn, operates
alarm bells or other indicators.
Care must be taken to ensure that the sensor is positioned and fixed correctly to
enable it to respond to the vibrations caused by an intrusion. The sensor must be fixed
to the fence as closely as possible so that the maximum amount of signal is generated
by the sensor in response to the intrusion attempt. The installation notes in this manual
are designed to ensure that, as far as possible, the above conditions are satisfied.
Most problems experienced on site stem from a lack of understanding of the principle
of operation of the system and consequential installation errors. It is vital that this
manual is thoroughly read and understood prior to system installation.

1.3 Fundamentals of Perimeter Protection

The prevention and detection of an intrusion onto a site depends on the installation of
an adequate physical barrier in combination with an appropriate sensor system.
Together they can alert the operator to the presence of unacceptable levels of
perimeter activity and assist in the decision to activate an alarm.
Without a sensor system any barrier is unintelligent and cannot be used to warn when
there is an intruder activity; on the other hand the best sensor system cannot provide
intruder detection unless it is properly attached to a suitable barrier, which can serve as
a fundamental component towards giving the system its maximum detection capability.
Perimeter protection should therefore be designed as a combination of appropriate
fence construction and sensor system to achieve the pre-determined expectations for
intruder detection.
GeoZone 'A' Perimeter Security System
Installation Manual
Page 1