Temperature compensated alarm system

Details Temperature compensated alarm system Temperature compensated alarm system

1984-03-05

1985-10-08

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340511, 340522, 340565, 374132, G08B 2300

Patent

active

045463441

ABSTRACT:
A temperature compensated alarm system includes a temperature transducer operative to produce an electrical output signal indicative of the ambient temperature, an alarm sensor, an electronic processing module, and a plurality of addressable registers for storing alarm threshold limits applicable at the operative ambient temperature. At selected times the electronic processing module reads a value indicative of the ambient temperature and thereupon determines the applicable alarm threshold limits by addressing the respective registers containing threshold limit data for the particular ambient temperature. In one embodiment, two sets of registers are provided; one set of registers containing higher sensitivity threshold limit data and the second set containing lower sensitivity threshold limit data. The applicable threshold data is determined by the state of a user settable switch.

REFERENCES:
patent: 4364030 (1982-12-01), Rossin
patent: 4475103 (1984-10-01), Brokaw et al.

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