IFS-2600 Installation & Programming Manual Page 39
P/N 10069 ECN08-0066
APPENDIX C
ALARM VERIFICATION FACILITY (AVF)
Alarm verification (AVF) is a facility used to minimise false alarms.
AVF only applies to the zones programmed for the AVF function.
GLOBAL PROGRAMMABLE OPTIONS
AVF TIMEOUT
Disabled
2 Minutes
3 Minutes
4 Minutes
5 Minutes
Operation is as follows:
If a zone is programmed as AVF and it registers an alarm, no alarm functions are performed, if it is the first
AVF zone in alarm.
This zone and all other zones programmed as AVF zones are reset by shutting down power to their detectors
for 12 seconds, the power is then restored and the zones are re- enabled.
The alarm verification zones are now in "alert" mode. Any AVF zone going into alarm within the pre-selected
timeout period (2,3,4,5 minutes) will then cause an immediate alarm condition with all the programmed output
functions being initiated.
If no alarm is received within this period, the AVF zones are removed from the "alert" mode and returned to
normal. A further alarm will re-initiate the reset sequence etc.
Other zones are unaffected by the actions of AVF zones. They will all function as normal, regardless of AVF
zone status.
If the timeout period is disabled, the alarm will transmit instantly thus making the AVF non-functional.
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