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Instruction Manual
748332-F
April 2003
4-4 Maintenance and Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA2000 NDIR
4-5 CHOPPER MOTOR REPLACEMENT
See Figure 4-4 below for a exploded view of the
Motor/Source Assembly. The entire optical
bench must be removed to perform this
replacement.
4-6 SOURCE REPLACEMENT
See Figure 4-4 below for a exploded view of
the Motor/Source Assembly. The entire optical
bench must be removed to perform this
replacement.
Figure 4-4. Motor/Source Assembly
Housing Assembly
Screw
Lock Washer
Insulator
Source
Insulator
Source Case
Source Assemblies
(see detail below)
Ref - Housing
Assembly
Motor
Ref - Source
Assemblies
Motor Plate
O-Ring
Chopper
Blade
Nylon
Washer
Screw
Retaining
Ring
Screen Filter
(optional)
Source Buffer
Source Gasket
Dual Cap Assembly