Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1990-05-17
1992-10-13
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
340511, 340588, G08B 2900
Patent
active
051554682
ABSTRACT:
Methods for detecting an alarm condition includes repeatedly converting an ambient condition into voltage outputs in detector apparatus repeatedly converting the voltage outputs into a series of actual analog values, polling the series of actual analog values to determine an average analog value, repeatedly comparing the difference between the average analog value and the last actual analog value with a predetermined delta-threshold value and indicating an alarm condition when the difference between the average analog value and the last actual analog value exceeds the delta-threshold value. Methods for detecting an alarm condition further includes repeatedly comparing the average analog value with a maintenance threshold value and indicating a maintenance signal when the average analog value exceeds the maintenance threshold value.
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Farley Robert W.
Metyka, Jr. Charles J.
Stanley Lawrence G.
Crosland Donnie L.
Sinmplex Time Recorder Co.
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