Alarm verification is a feature of automatic fire detection and alarm systems to reduce false alarms where sensors report alarm conditions for a minimum period of time, or confirm alarm conditions within a given period of time after being reset, in order to be accepted as a valid alarm initiation signal.
Alarm verification points are programmed individually to activate the verification feature. Refer to Point Index. Any resettable fire point can activate alarm verification for the area to which it is assigned. Bosch recommends using separate area alarm verification outputs.
To enable alarm verification on a point, set Point Type to Fire, and Alarm Verify and Resettable to Yes. When an alarm verification point is faulted, the control panel automatically removes power to all resettable points connected to the areas Reset Sensors output. Power is removed for 4.5 seconds. When power is reapplied, the control panel ignores alarms from the resettable points for the amount of time programmed in Restart Time. After Restart Time has expired, a 65 second confirmation window begins. If the alarm verification point is still in alarm, or faults again during the confirmation window, or if a different alarm verification point in the area faults, an alarm is generated.
Part numbers D7212B, D9112B, D7212B1, D9112B1, D7212, D7412, D9112, D9124, D9412, D7412G, D9124G, D9412G, D7412GV2, D9124GV2, D9412GV2, D7412GV3, D9412GV3, D7412GV4, D9412GV4, B8512G, B9512G