Emerson 4000 manual Entire Probe Replacement Excluding Probe Head, Heater Strut Replacement

Instruction Manual

IB-106-340 Rev. 3.0 December 2003

Oxymitter 4000

6.Turn the electronic assembly over so that you are looking at the bottom of the power supply printed circuit board. Gently depress the two white posts one at a time. Carefully separate the power supply board (20) from the micropro- cessor board (17).

7.Remove the fuse (19) and replace it with a new one (Figure 9-7).

8.Align the white posts with the post holes on the power supply board and the pin connector on the power supply board with the connector port on the back of the microprocessor board. Gently push the boards together until the white posts snap in place. Ensure the assembly is secure by gently trying to separate the boards.

9.Reconnect connector J8 to the power supply board. Make sure the connector is secure.

10.Holding the J1 connector leads, slide the electronic assembly the rest of the way into the housing. Align the elec- tronic assembly so that it fits flush on the pins. To ensure that it is flush, gently try to rotate the electronics. If the electronics rotates, repeat the alignment.

11.Reconnect the J1 connector to the mi- croprocessor board. Ensure the con- nector is secure and tighten the three captive screws on the microprocessor board (top board).

12.Replace the housing cover and ensure that it is tight.

g.Entire Probe Replacement (Excluding Probe Head)

Do not attempt to replace the probe until all other possibilities for poor performance have been considered. If probe replacement is needed, see Table 11-1for part numbers.

1.Follow the instructions in paragraph 9-4a.1to remove the Oxymitter 4000

from the stack or duct. If removing an Oxymitter 4000 with an integrally mounted SPS 4000, follow the instruc- tions in paragraph 9-4b.1.

2.Separate the probe and the probe head per paragraph 9-4c,steps 2 through 6.

3.Reinstall the probe head on the new probe per paragraph 9-4c,steps 7 through 13.

h.Heater Strut Replacement

This paragraph covers heater strut re- placement. Do not attempt to replace the heater strut until all other possibilities for poor performance have been considered. If heater strut replacement is needed, order a replacement heater strut. (Table 11-1). Re- fer to Figure 9-3or Figure 9-4to view the component parts of the Oxymitter 4000.

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 800°F (427°C). This can cause severe burns.

NOTE

If the Oxymitter 4000 has an integrally mounted SPS 4000, it is not necessary to remove the sequencer when re- placing the heater strut.

1.Follow the instructions in paragraph

9-4a.1to remove the Oxymitter 4000 from the stack or duct. If removing an Oxymitter 4000/SPS 4000 assembly, follow the instructions in paragraph 9-4b.1.

2.For a unit with integral electronics, dis- connect electronics per paragraph 9-4c,steps 2 through 5.

3.For a unit with remote electronics, re- move cover (11, Figure 9-4)from housing (21), and disconnect signal

9-12 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management