Instruction Manual

748332-F April 2003

Model NGA2000 NDIR

4-5 CHOPPER MOTOR 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.

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.

 

Housing Assembly

 

Dual Cap Assembly

 

Retaining

 

 

 

 

 

 

Ring

 

Source Assemblies

 

Chopper

 

(see detail below)

Ref - Housing

Blade

 

 

Assembly

 

 

 

Ref - Source

Screw

Screen Filter

 

Assemblies

Nylon

(optional)

 

 

 

 

 

Washer

 

 

 

O-Ring

 

Motor Plate

Motor

Source Gasket

Source Buffer

Screw

Source Case

Lock Washer

Insulator

Insulator

Source

 

Figure 4-4. Motor/Source Assembly

4-4 Maintenance and Troubleshooting

Rosemount Analytical Inc. A Division of Emerson Process Management