HEAT SENSOR

PURPOSE:To stably test the functions of a heat sensor without depending on the change in environmental temperature. CONSTITUTION:When testing the functions of a heat sensor, a switch 11 is turned to S2 side. In this case, when the temperature characteristics of a test element 12 are equal to those o...

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Bibliographic Details
Main Author KIMURA TETSUO
Format Patent
LanguageEnglish
Published 22.12.1995
Edition6
Subjects
ALARM SYSTEMS
MEASURING
MEASURING QUANTITY OF HEAT
MEASURING TEMPERATURE
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TESTING
THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Summary:PURPOSE:To stably test the functions of a heat sensor without depending on the change in environmental temperature. CONSTITUTION:When testing the functions of a heat sensor, a switch 11 is turned to S2 side. In this case, when the temperature characteristics of a test element 12 are equal to those of a temperature detection element 1, a potential VS at a middle point 5 when the switch 11 is set to the S2 side does not depend on environmental temperature (temperature function is canceled) and becomes a constant value. Therefore, the resistance of the test element 12 is set in advance so that the value becomes a value equivalent to a fire reporting level to test the functions of the detector. Namely, when the switch 11 is set to the S2 side, the potential VS at the middle point 5 reaches a fire alarm level without being affected by ambient temperature and a signal processing part 6 can report a mock fire occurrence to a receiver when the functions of the signal processing part 6 are normal.
Bibliography:Application Number: JP19940150485