Emerson Process Management OXYMITTER 4000 instruction manual Hazardous Area Oxymitter

Hazardous Area Oxymitter 4000

Instruction Manual

IB-106-340C Rev. 4.1 July 2004

12.If previously removed, install the entire electronics per paragraph 9-4b,steps 4 and 5.

13.Follow the instructions in paragraph 2-1bto install the Hazardous Area Oxymitter 4000 into the stack or duct. If there is an abrasive shield in the stack, make sure the dust seal gaskets are in place as they enter the 15° reducing cone.

i.Ceramic Diffusion Element Replacement

NOTE

This procedure applies to the ceramic diffuser element only.

1.General

The diffusion element protects the O2 cell from particles in process gases. The element does not normally 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 diffusion element may become apparent during calibration. Compare probe response with previous response. A broken diffusion element will cause a slower response to cali- bration 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 11-1.

2.Replacement Procedure

(a)Follow the instructions given in paragraph 9-4ato remove the Hazardous Area Oxymitter 4000 from the stack or duct.

(b)Loosen setscrews, Figure 9-10,using hex wrench from Probe

Disassembly Kit, Table 11-1and remove vee deflector. Inspect setscrews. If damaged, replace with stainless setscrews coated with anti-seize compound.

(c)On systems equipped with abra- sive shield, remove dual dust seal gaskets.

(d)Use spanner wrenches from the Probe Disassembly Kit, Table

11-1,to turn hub free from retainer.

(e)Put the hub in vise. Break out old ceramic diffusion element with chisel along cement line and 9.5 mm (3/8 in.) pin punch through cement port.

(f)Break out remaining ceramic diffu- sion element by tapping lightly around hub with hammer. Clean grooves with pointed tool if neces- sary.

(g)Replace ceramic diffusion element using the ceramic diffusion ele- ment replacement kit in Table

11-1.This consists of a diffusion element, cement, setscrews, anti- seize compound and instructions.

(h)Test fit replacement ceramic diffu- sion element to be sure seat is clean.

Do not get cement on ceramic diffu- sion element except where it touches the hub. Any cement on ceramic diffu- sion element blocks airflow through element. Wiping wet cement off of the ceramic only forces cement into pores. Also do not get any cement onto the flame arrestor element.

9

(i)Thoroughly mix cement and insert tip of squeeze bottle into cement port. Tilt bottle and squeeze while simultaneously turning ceramic

Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 9-17