Emerson Process Management IM-106-340 Replace Entire Integral Electronics with Housing

Oxymitter 4000

Instruction Manual

IM-106-340, Rev. 4.0 May 2006

Replace Entire Integral Electronics (with Housing)

NOTE

Only perform this procedure on units with integral electronics.

NOTE

Recalibration is required whenever electronic cards or sensing cell is replaced.

1.Follow the instructions in "Removal and Replacement of Probe", to remove the Oxymitter 4000 from the stack or duct.

2.Remove the right housing cover uncovering the electronic assembly (Figure 9-5).

3.Depress and remove the J1 (cell and T/C) connector from the J1 socket. Loosen the three captive mounting screws (16, Figure 9-3or Figure 9-4) on the microprocessor board (top board).

4.The J8 connector (heater leads) (Figure 9-6)can be accessed by moving the J1 connector leads out of the slot on the microprocessor board (17) and sliding the electronic assembly (12) partially out of the housing (Figure 9-3or Figure 9-4).

5.Squeeze the J8 connector on the sides and carefully remove. The electronic assembly can now be completely removed from the housing.

6.Remove four screws (7, Figure 9-3)from the probe finned housing. The probe and the electronic housing can now be separated.

7.When reinstalling or replacing the electronic housing, make sure that O-ring (10) is in good condition. Place the J1 and J8 connectors in the hole on the flat side of the electronic housing.

8.Hold the J1 and J8 connectors out and to the probe side of the electronic housing. Make sure that the conduit port of the electronic housing is on the same side as the CAL and REF gas ports. Replace the four screws and tighten.

9.Reconnect the J8 connector 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 electronic 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 microprocessor board. Ensure the connector is secure and tighten the three captive screws on the microprocessor board (top board).

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

13.Follow the instructions in "Removal and Replacement of Probe" to install the Oxymitter 4000 into the stack or duct.

9-10