Sensitivity test system for photoelectric smoke detector

Details Sensitivity test system for photoelectric smoke detector Sensitivity test system for photoelectric smoke detector

1994-01-21

1995-12-05

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340630, G01N 1506

Patent

active

054731674

ABSTRACT:
A photoelectric smoke detector has test circuitry for testing the detector by increasing the sensitivity thereof. The sensitivity is increased by either altering a bias condition of a photosensor or by altering a gain parameter of the detector. The detector returns to a quiescent state when the sensor returns to its original bias condition or when the gain parameter returns to its quiescent value.

REFERENCES:
patent: 4238788 (1980-12-01), Rosauer
patent: 4321466 (1982-03-01), Mallory et al.
patent: 4471346 (1984-09-01), Nelson et al.
patent: 4845474 (1989-07-01), Moore et al.

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