Teledyne 7300A Operating Instructions Manual page 79

Infrared Gas Analyzer Maintenance 5
(b) Chopper hitting housing.
(c) Noisy detector.
(d) AC pickup at printed circuit
board.
(e) Optical unit not grounded to
cabinet.
(f) Detector connections loose.
(g) Faulty preamplifier board.
(h) Contamination in cell.
5-9
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