Electronics Replacement; Figure 4-6. J8 Connector - Emerson Oxymitter 5000 Instruction Manual

Oxymitter 5000
2. Replace.
(a) Bolt the Oxymitter 5000/SPS 4000
assembly to the stack and install
insulation.
(b) Follow the instructions in para-
graph 2-3 to connect the line volt-
age and signal leads to an
Oxymitter 5000/ SPS 4000
assembly.
(c) Follow the instructions in para-
graph 2-5 to connect the calibration
gases and instrument air to an
Oxymitter 5000/SPS 4000 assem-
bly. Turn on the calibration gases
at the cylinders and turn on instru-
ment air.
(d) Restore power to the system.
4-5

ELECTRONICS REPLACEMENT

Each of the following procedures details how to
remove and replace a specific electronic com-
ponent of the Oxymitter 5000.
NOTE
Recalibration is required whenever
electronic cards or sensing cell is
replaced.
a. Entire Electronics Replacement (with
Housing).
NOTE
Only perform this procedure on Oxy-
mitter 5000 units without integrally
mounted SPS 4000 units. If it is neces-
sary to replace the entire electronics
on an Oxymitter 5000/ SPS 4000 as-
sembly, contact Rosemount for further
instructions.
1. Follow the instructions in paragraph
4-4a.1 to remove the Oxymitter 5000
from the stack or duct. If removing an
Rosemount Analytical Inc. A Division of Emerson Process Management
Oxymitter 5000/SPS 4000 assembly,
follow the instructions in paragraph 4-
4b.1.
2. Remove the right housing cover un-
covering the electronic assembly
(Figure 4-5).
3. Depress and remove the J1 (cell and
T/C) connector from the J1 socket.
Loosen the three captive mounting
screws on the microprocessor board
(top board).
4. The J8 connector (heater leads) can be
accessed by moving the J1 connector
leads out of the slot on the microproc-
essor board and sliding the electronic
assembly partially out of the housing
(Figure 4-6).
5. Squeeze the J8 connector on the sides
and carefully remove. The electronic
assembly can now be completely re-
moved from the housing.
6. Remove the four screws (7, Figure 4-1)
from the probe finned housing. The
probe and the electronic housing can
now be separated.
1
+
+ +
5A
250VAC
TIME LAG
1
+

Figure 4-6. J8 Connector

Maintenance and Service
Instruction Manual
IB-106-350 Rev. 1.2
April 2001
+
POWER
SUPPLY
BOARD
+ +
J8
+
+
22220061
4-9
4