4
M
AINTENANCE AND
T
ROUBLESHOOTING
748332-D Rosemount Analytical June 1997
4-1
NGA 2000 Non-Dispersive Infrared Analyzer
Servicing requires access to live parts which can cause death or serious injury.
Refer servicing to qualified personnel.
4.1 OVERVIEW
NDIR Analyzer Module components that may require cleaning or replacement include:
•
all printed circuit boards
•
power fuse
•
the module fan
•
the chopper motor
•
the source
•
the detector
•
flow sensor
•
case temperature sensor
•
Analysis cells and optical components
•
RTD - detector temp. controller
•
thermal fuse
The only components that may require adjustment are the oscillator tune and shutter
balance adjustments. These are factory-set, and should be adjusted only in the
following cases:
•
if the operator has changed sources, oscillator board or detector
•
if the operator disassembles the bench to any degree.
Also available for maintenance adjustment through the Front Panel display and
keypad are the source current, preamplifier gain (referred to as Signal Gain on the
sub-menu) and the modulation check.
WARNING: ELECTRICAL SHOCK HAZARD
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