Emerson Process Management OXYMITTER 4000 IM-106-340 - Manual (Page 135)

Instruction Manual
IM-106-340, Rev. 4.0
May 2006
9-19
Oxymitter 4000
Ceramic Diffusion Element Replacement
NOTE
This refers to the ceramic diffusion element only.
General
The diffusion element protects the cell from particles in process gases.
Normally, it does not need to be replaced because the vee deflector
protects it from particulate erosion.
In severe environments, the filter may be broken or subject to excessive
erosion. Examine the ceramic diffusion element whenever removing the
probe for any purpose. Replace if damaged.
Damage to the ceramic diffusion element may become apparent during
calibration. Compare probe response with previous response. A broken
diffusion element will cause a slower response to calibration gas. Hex
wrenches needed to remove setscrews and socket head screws in the
following procedure are available as part of a Probe Disassembly Kit,
Table 10-1.
Replacement Procedure
a. Follow the instructions in "Removal and Replacement of Probe" to
remove the Oxymitter 4000 from the stack or duct.
b. Loosen setscrews, Figure 9-11, using hex wrench from Probe
Disassembly Kit, Table 10-1, and remove vee deflector. Inspect
setscrews. If damaged, replace with stainless setscrews coated with
anti-seize compound.
Figure 9-11. Ceramic Diffuser
Element Replacement
Retainer
Spanner
Wrench
Optional Ceramic
Diffusion Element
Set Screw
Vee
Deflector
Cement
Fillet
Cement
Port
Hub
22220029