Emerson Rosemount Analytical Oxymitter 4000 Instruction Manual page 131

Hazardous Area Oxymitter 4000
15. Replace right housing cover (1, Figure
9-3); make sure it is tight. Secure the
cover using captive washer (20), cover
lock (19), and screw (18).
16. Install and tighten cover (1); make sure
it is tight. Secure the cover using cap-
tive washer (20), cover lock (19), and
screw (18).
When working on this equipment on
the laboratory bench, be aware that
the Hazardous Area Oxymitter 4000,
probe tube, and flame arrestor hub
can be hot [up to 300°C (572°F)] in the
region of the probe heater.
f. Entire Probe Replacement
(Excluding Electronics)
Do not attempt to replace the probe until all
other possibilities for poor performance
have been considered. If probe replacement
is needed, see Table 11-1 for part numbers.
1. Follow the instructions in paragraph
9-4a to remove the Hazardous Area
Oxymitter 4000 from the stack or duct.
2. Separate the probe and the electronics
housing per paragraph 9-4b, step 2.
3. Reinstall electronics on the new probe
per paragraph 9-4b, steps 4 and 5.
4. Follow the instructions in paragraph
2-1b to install the Hazardous Area
Oxymitter 4000 into the stack or duct.
When working on this equipment on
the laboratory bench, be aware that
the Hazardous Area Oxymitter 4000,
probe tube, and flame arrestor hub
can be hot [up to 300°C (572°F)] in the
region of the probe heater.
Rosemount Analytical Inc. A Division of Emerson Process Management
Instruction Manual
g. Heater Strut Replacement
This paragraph covers heater strut replace-
ment. Do not attempt to replace the heater
strut until all other possibilities for poor per-
formance have been considered. If heater
strut replacement is needed, order a re-
placement heater strut. See Table 11-1.
Use heat resistant gloves and clothing
when removing probe. Do not attempt
to work on the probe until it has
cooled to room temperature. The
probe can be as hot as 300°C (572°F).
This can cause severe burns.
1. Follow the instructions in paragraph
9-4a to remove the Hazardous Area
Oxymitter 4000 from the stack or duct.
2. Remove oxygen sensing cell per para-
graph 9-4h, steps 1 through 5.
Do not force the probe housing when
installing or removing from the inte-
gral electrical barrier/feedthrough
(Figure 9-3). Damage to the aluminum
probe housing can occur.
3. Remove four screws (22, Figure 9-3)
and washers (21) from the probe tube
assembly (23). Remove the probe tube
assembly from the housing (11).
4. Once the probe and housing are sepa-
rated, spring tension releases, and the
heater strut assembly (32) moves up.
Remove strut pressure clamp (35).
5. Disconnect the heater and signal wire
connectors from the mating connectors
on the heater strut assembly (32).
Maintenance and Service
IB-106-340C Rev. 4.1
July 2004
9-13
9