Flame detector self diagnostic system employing a modulated opti

Details Flame detector self diagnostic system employing a modulated opti Flame detector self diagnostic system employing a modulated opti

1994-12-19

1996-02-27

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Flame light source

340578, 431 79, G01J 510

Patent

active

054951127

ABSTRACT:
A self diagnostic system for a flame detector. The system produces an optical determinant signal from an analog determinant signal that has a controllable amplitude and frequency. The system detects the optical determinant signal and the optical signal from the flame and processes both signals to thereby continuously monitor the flame while also continuously analyzing the operating status of the flame detector.

REFERENCES:
patent: 3286761 (1966-11-01), Engh
patent: 3391984 (1968-07-01), Metcalf et al.
patent: 3609382 (1971-09-01), Moore et al.
patent: 4322723 (1982-03-01), Chase
patent: 4381455 (1983-04-01), Komori
patent: 4692750 (1987-09-01), Murakami et al.
patent: 5026272 (1991-06-01), Takahashi et al.
patent: 5264708 (1993-11-01), Hijikata

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