Emerson Process Management IM-106-340 Ceramic Diffusion Element Replacement, General

Instruction Manual

IM-106-340, Rev. 4.0 May 2006

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

Figure 9-11. Ceramic Diffuser Element Replacement

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.

Retainer	Spanner
	Wrench

Optional Ceramic

Diffusion Element

Set Screw

Hub
Cement	Cement
Port	Fillet

Vee	22220029
Deflector

9-19