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Appendix 7: Specifications
compromised deliberately or may fail to operate as expected for a variety of reasons. Some but not all of these reasons may
be:
Inadequate Installation
A security system must be installed properly in order to provide adequate protection. Every installation should be evaluated
by a security professional to ensure that all access points and areas are covered. Locks and latches on windows and doors
must be secure and operate as intended. Windows, doors, walls, ceilings and other building materials must be of sufficient
strength and construction to provide the level of protection expected. A reevaluation must be done during and after any con-
struction activity. An evaluation by the fire and/or police department is highly recommended if this service is available.
Criminal Knowledge
This system contains security features which were known to be effective at the time of manufacture. It is possible for persons
with criminal intent to develop techniques which reduce the effectiveness of these features. It is important that a security sys-
tem be reviewed periodically to ensure that its features remain effective and that it be updated or replaced if it is found that it
does not provide the protection expected.
Access by Intruders
Intruders may enter through an unprotected access point, circumvent a sensing device, evade detection by moving through
an area of insufficient coverage, disconnect a warning device, or interfere with or prevent the proper operation of the system.
Power Failure
Control units, intrusion detectors, smoke detectors and many other security devices require an adequate power supply for
proper operation. If a device operates from batteries, it is possible for the batteries to fail. Even if the batteries have not failed,
they must be charged, in good condition and installed correctly. If a device operates only by AC power, any interruption, how-
ever brief, will render that device inoperative while it does not have power. Power interruptions of any length are often
accompanied by voltage fluctuations which may damage electronic equipment such as a security system. After a power inter-
ruption has occurred, immediately conduct a complete system test to ensure that the system operates as intended.
Failure of Replaceable Batteries
This system’s wireless transmitters have been designed to provide several years of battery life under normal conditions. The
expected battery life is a function of the device environment, usage and type. Ambient conditions such as high humidity, high
or low temperatures, or large temperature fluctuations may reduce the expected battery life. While each transmitting device
has a low battery monitor which identifies when the batteries need to be replaced, this monitor may fail to operate as expec-
ted. Regular testing and maintenance will keep the system in good operating condition.
Compromise of Radio Frequency (Wireless) Devices
Signals may not reach the receiver under all circumstances which could include metal objects placed on or near the radio
path or deliberate jamming or other inadvertent radio signal interference.
System Users
A user may not be able to operate a panic or emergency switch possibly due to permanent or temporary physical disability,
inability to reach the device in time, or unfamiliarity with the correct operation. It is important that all system users be trained
in the correct operation of the alarm system and that they know how to respond when the system indicates an alarm.
Smoke Detectors
Smoke detectors that are a part of this system may not properly alert occupants of a fire for a number of reasons, some of
which follow. The smoke detectors may have been improperly installed or positioned. Smoke may not be able to reach the
smoke detectors, such as when the fire is in a chimney, walls or roofs, or on the other side of closed doors. Smoke detectors
may not detect smoke from fires on another level of the residence or building.
Every fire is different in the amount of smoke produced and the rate of burning. Smoke detectors cannot sense all types of
fires equally well. Smoke detectors may not provide timely warning of fires caused by carelessness or safety hazards such
as smoking in bed, violent explosions, escaping gas, improper storage of flammable materials, overloaded electrical circuits,
children playing with matches or arson.
Even if the smoke detector operates as intended, there may be circumstances when there is insufficient warning to allow all
occupants to escape in time to avoid injury or death.
Motion Detectors
Motion detectors can only detect motion within the designated areas as shown in their respective installation instructions.
They cannot discriminate between intruders and intended occupants. Motion detectors do not provide volumetric area pro-
tection. They have multiple beams of detection and motion can only be detected in unobstructed areas covered by these
beams. They cannot detect motion which occurs behind walls, ceilings, floor, closed doors, glass partitions, glass doors or
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