Xtralis ADPRO Presidium, Installation And User Manual

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ADPRO Presidium by Xtralis Installation and User Manual
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Appendix A: False and Nuisance Alarms
Ultimately no security system is perfect, generally through generating false or nuisance alarms.
As a security system is made more sensitive to detecting intrusions, the false and nuisance
alarm rate can increase. False or nuisance activations limit the effectiveness of a security
system, as operators become used to receiving alarms that are not valid, and may miss valid
alarms assuming that the alarm is just another false or nuisance alarm.
• A False Alarm can be defined as an alarm activation that is reported, but the cause of which
can not be identified.
• A Nuisance Alarm can be defined as an alarm activation that is reported, but the cause of
the alarm can be verified and no further response is required.
The goal in designing a security system is to provide the highest rate of successful detection,
traded off against the lowest rate of false and nuisance alarms. Using a system such as
Presidium, coupled to FastTrace, FastTx or FastTrace-R, provides the capability to remove
Nuisance Alarms as a problem, as the alarm must be verified remotely at a Monitoring Centre
prior to dispatch of personnel.
The use of a second detection technology/device (e.g. PIR, microwave detector or fence sensor)
may also be useful in minimising false alarms. The second device may be ‘ANDed’ with VMD to
provide ‘double knock’ alarm generation.
In addition, a well-designed and correctly installed system can limit the generation of False
Alarms significantly. The capability of reducing the impact of both of these types of problem
alarms greatly enhances the utility and suitability of the Presidium Intelligent Video System to a
number of scenarios.