Multizone intruder detection system with forced walk-test

Details Multizone intruder detection system with forced walk-test Multizone intruder detection system with forced walk-test

1990-08-31

1991-10-15

Coles, Sr., Edward L.

Communications: electrical

Condition responsive indicating system

With particular system function

340509, 340517, 340518, 340523, 340526, 340527, 340528, G08B 2900

Patent

active

050578162

ABSTRACT:
A multizone intruder detection system comprises a supervisory circuit for verifying, while the system is disarmed, that each of a plurality of intrusion sensors is, indeed, functional. The supervisory circuit inhibits rearming of a disarmed system until it determines that each sensor has successfully operated within a relatively brief time interval just prior to the time an attempt is made to arm the system. A timing circuit, activated by a preliminary arm signal, operates to establish a time window (e.g. 10 minutes) within which the operability of each sensor must be verified (i.e. walk-tested) as a precondition to system arming. Preferably, the timing circuit is reset by each sensor alarm output, whereby the system user is given the full time window to walk-test each sensor. By virtue of the invention, sensor sabotage in a disarmed system can be mitigated.

REFERENCES:
patent: 4611197 (1986-09-01), Sansky
Detection Systems DS7100, 130 Perinton Parkway, Fairport, N.Y., 14450, May 16, 1991.

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