Emerson Process Management 760004-A - Manual (Page 50)

Instruction Manual
760004-A
February 2002
4-12 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
Sample RTD
657061
Cartridge Heater
659643
Thermostat
657065
4-5 THERMAL BLOCK
The sample RTD can be replaced with the
thermal block attached to burner and mounted
in oven. The cartridge heater and thermostat
are also replaceable with thermal block se-
cured to burner, but must be removed from
the oven.
a. Sample RTD
1. Refer to Figure 4-4A. Remove the
four screws securing the oven cover,
remove cover.
2. Disconnect the sample RTD wiring
connector, note location.
3. Refer to Figure 4-9. Remove the two
screws securing the sample RTD, pull
sample RTD out.
4. Install replacement sample RTD, se-
cure with screws.
5. Attach sample RTD wiring connector.
6. Re-attach oven cover.
Figure 4-9. Thermal Block – Sample RTD, Cartridge Heater and Thermostat