Rosemount Oxymitter 4000, Instruction Bulletin

Page: 94 / 127

IB-106-340
6-9
5. Squeeze the J8 connector on the sides and
carefully remove. The electronic assembly
can now be completely removed from the
housing.
6. Remove the four screws (7, Figure 6-1) 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 se-
cure.
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 micro-
processor board. Ensure the connector is se-
cure 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 paragraph 6-4a2 to
install the Oxymitter 4000 into the stack or
duct. If installing an Oxymitter 4000/
SPS 4000 assembly, follow the instructions in
paragraph 6-4b2.
b. Electronic Assembly Replacement. (Figure 6-5).
1. Remove the right housing cover uncovering
the electronic assembly.
2. Depress and remove the J1 (cell and T/C)
connector from the J1 socket. Loosen the
three captive mounting screws on the micro-
processor board (top board).
3. The J8 connector (heater leads) can be
accessed by moving the J1 connector leads
out of the slot on the microprocessor board
and sliding the electronic assembly partially
out of the housing (Figure 6-6).
4. Squeeze the J8 connector on the sides and
carefully remove. The electronic assembly
can now be completely removed from the
housing.
5. Reconnect the J8 connector to the power
supply board. Make sure the connector is se-
cure.
6. 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.
7. Reconnect the J1 connector to the micro-
processor board. Ensure the connector is se-
cure and tighten the three captive screws on
the microprocessor board (top board).
8. Replace the housing cover and ensure it is
tight.