Intruder Alarms Flashcards
Where would you use a magnetic contact
Exit/entry doors
Name the 3 types of protection in an intruder system
Perimeter protection
Shell or space protection
Trap protection
What is an internia detector
A gold plated ball mounted to a spring that sits tight to two fixed contacts. If it receives a sudden vibration the hall moves away from the two contacts setting off the alarm
What is perimeter protection
Where detectors are placed to protect the boundary walls,doors,windows of a house
What is space or shell protection
Where detectors are placed to protect open areas within the house halls,living rooms
What is trap protection
Where detectors are deliberately placed to trap the intruder
Advantages of a PIR
Cheap
Easy to install
Disadvantages of a PIR
Not suitable for outside use
PIR are not fail safe
What is the duel detector
Infrared for thermal and microwave motion sensor in the one unit
Where is Active infared used
Used in gate systems
What is the advantages if zoning in a intruder system
Identify faults easier
More flexibility when part arming the system
Clear identification of point of Entry
Name the two types of wiring for intruder alarm systems
Open loop
closed loop
Components of a PIR
Pulse count selector
Walk test enable/disable
Thermal sensing element
Processor chip
Tamper switch
Motion sensor led
6 terminals
Name 3 types of detectors in a intruder system
Magnetic reed switch
Vibration sensor
Duel PIR infared and microwave sensor
What detector can detect motion through walls
Ultrasonic motion detector
