30Nov/15

Burglar Alarm System-Restore

RESTORE: When a detector reverts from the state of alarm to the normal standby state, it is said to have been “restored”.

A motion detector restores automatically after detection of movement, and becomes ready to detect again. This kind of “restore” is not reported to the remote responders.

A magnetic contact detector restores only upon closure of the protected door or window. This kind of “restore” is reported to the remote responders.

30Nov/15

Alarm Systems- Zone ?

ZONE: A zone is an area within the protected site under supervision of a specific detector. During programming, the installer allows the control panel to learn the detector’s identity code and links it to the desired zone. Since the zone is distinguished by number and name, the control panel can report the zone status to the user and register in its memory all the events reported by the zone detector. Instant and delay zones are “on watch” only when the control panel is armed, and other (24-hour zones) are “on watch” regardless of whether the system is armed or not.

30Nov/15

Magnetic Contact Detector

MAGNETIC CONTACT DETECTORS : Each Magnetic Contact Detector comprises two parts; a Magnetic Contact Switch and a Magnet. They are designed to be fitted to either doors or windows with the Magnet fixed to the moving/opening part and the Contact Switch fixed to the door or window frame. When the protected door or window is closed, the Contact Switch is held closed by the magnetic field from the Magnet. Opening the protected door or window will remove the magnetic field and allow the contact switch to open generating an alarm signal at the Control Panel, (if the system is armed).

Decide which doors and windows are to be protected by fitting the Magnetic Contact Detectors. Normally the front and back doors will have Magnetic Contact Detectors fitted. Additional detectors may be fitted where required to other more vulnerable doors or windows, e.g. garage, patio and conservatory doors etc.

30Nov/15

Passive Infra Red (PIR) Detectors

PASSIVE INFRA RED MOVEMENT DETECTORS : Passive Infra Red (PIR) detectors are designed to detect movement in a protected area by detecting changes in infra red radiation levels within its field of vision. If movement is detected the PIR detector will generate an alarm signal at the Control Panel, (if the system is armed). PIR detectors will also detect animals, so ensure that pets are not permitted access to areas fitted with PIR Movement Detectors when the system is armed.