Emerson Process Management OXYMITTER 4000 - Manual (Page 133)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 9-15
Hazardous Area Oxymitter 4000
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.
h. Cell Replacement
This paragraph covers O
2
cell replacement.
Do not attempt to replace the cell until all
other possibilities for poor performance
have been considered. If cell replacement
is needed, order the cell replacement kit.
See Table 11-1.
The cell replacement kit (Figure 9-9) con-
tains a cell and flange assembly, corrugated
seal, setscrews, socket head cap screws,
and anti-seize compound. The items are
carefully packaged to preserve precise
surface finishes. Do not remove items from
the packaging until they are ready to be
used. Spanner and hex wrenches needed
for this procedure are part of an available
special tools kit. See Table 11-1.
SOCKET HEAD
CAP SCREWS
CALIBRATION GAS
PASSAGE
26310016
PROBE TUBE
(NOT INCLUDED
IN KIT)
CORRUGATED
SEAL
CELL AND
FLANGE
ASSEMBLY
Figure 9-9. Cell Replacement Kit
Spanner and hex wrenches needed for this
procedure are part of an available special
tools kit. See Table 11-1.
Use heat-resistant gloves and clothing
when removing the probe. Do not at-
tempt to work on these components
until they have cooled to room tem-
perature. Probe components can be as
hot as 300°C (572°F). This can cause
severe burns.
Disconnect and lock out power before
working on any electrical components.
There is voltage of up to 115 VAC.
Do not remove the cell unless certain
it needs to be replaced. Removal may
damage the cell and platinum pad. Go
through the complete troubleshooting
procedure to make sure the cell needs
to be replaced before removing it.
1. Follow the instructions in paragraph
9-4a to remove the Hazardous Area
Oxymitter 4000 from the stack or duct.
The flame arrestor and flame arrestor
hub are among the critical compo-
nents of this type of protection. See
Safety Data Sheet 1A99078.
2. If the probe uses a snubber diffuser,
use a spanner wrench to remove the
flame arrestor/snubber diffuser assem-
bly.
NOTE
To determine if the diffuser needs to
be replaced, refer to paragraph 9-2. 9