Teledyne 7320 Operating Instructions Manual page 80

5 Maintenance Model 7320
Operation noises are:
(a) Reduced output of infrared source
(5v, 110 ma each) or replace as
necessary.
(b) Noisy detector.
(c) AC pickup at printed circuit
board.
(d) Optical unit not grounded to
cabinet.
(e) Detector connections loose.
(f) Faulty preamplifier board.
(g) Contamination in cell.
Teledyne Analytical Instruments
5-8