Sensitivity test system for photoelectric smoke detector by chan

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

1979-11-26

1982-03-23

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340630, G01N 1506

Patent

active

043214665

ABSTRACT:
A tester device is disclosed for a photoelectric smoke detector. The tester, when actuated, increases the intensity of light emitted by a light source to simulate in the sample chamber by such light scattering and reflecting off chamber walls, an amount of light which would be scattered by a predetermined concentration of smoke to which a photoelectric sensor is responsive and causes an indication that the detector is functioning as intended.

REFERENCES:
patent: 3376425 (1968-04-01), Kraus et al.
patent: 3510666 (1970-05-01), Topol
patent: 3655289 (1972-04-01), Walker
patent: 3812482 (1974-05-01), Clark
patent: 3935876 (1976-02-01), Massie et al.
patent: 4099178 (1978-07-01), Ranney et al.

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