Emerson Process Management NGA2000 HFID 用户手册

748297-E 
June 2003 

4-14     Maintenance and Troubleshooting 

Rosemount Analytical Inc.    A Division of Emerson Process Management  

Model NGA2000 HFID

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 

When replacing a circuit board, the follow-
ing procedure is recommended: 

1.  Per Section 4-2e on page 4-13, re-

move securing hardware from elec-
tronics assembly and lay on bench. 

2.  Remove securing hardware from 

printed circuit board to be replaced, 
do not disconnect cable(s). 

 

3.  One at a time, remove the wiring con-

nectors and attach to replacement 
board. 

Mount replacement board to electronics 
assembly. 

 
 
 
 
 
 
 
 

Safety Board
657499 

Sensor Board 
657060 

Computer Analysis Board 
659149 

Preamp Assembly 
656945 

Case Pressure Purge 
Switch  903690 

Power Supply Board 
655764 

Case Temperature Sensor 
656026