Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1991-08-07
1992-12-15
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
340511, 340514, 340588, G08B 2300
Patent
active
051720965
ABSTRACT:
A system and method for establishing an alarm threshold for each member of a plurality of detectors or sensors includes storing a value returned from each detector indicative of a clear air condition. A second value returned from each detector indicative of a test condition is stored. The stored values are combined with a common detector characteristic value to produce a unique alarm theshold for each detector. The determined alarm thresholds can be stored for subsequent use. Subsequently, a value returned from a detector indicating a current ambient condition can be compared to that detector's previously determined alarm threshold. If the currently returned value from the detector exceeds the predetermined alarm threshold, an alarm condition can be indicated.
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Clow Robert J.
Tice Lee D.
Crosland Donnie L.
Pittway Corporation
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