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Instruction Manual
IB-106-340 Rev. 2.4
April, 2001
Rosemount Analytical Inc. A Division of Emerson Process Management Troubleshooting 7-13
Oxymitter 4000
DIAGNOSTIC
ALARMS
TEST
POINTS
HEATERT/C
HEATER
O2 CELL
CALIBRATION
CALIBRATION RECOMMENDED
O2 CELL mV +
O2 CELL mv -
HEATERT/C +
HEATERT/C -
INC INC
DEC DEC
HIGH
GAS
LOW
GAS
CAL
TEST GAS +
PROCESS -
% O2
SW2
TP1
J1
TP2
TP3
RED
YEL
GRN
ORG
TP4
TP5
TP6
ON
22220041
Figure 7-10. Fault 10, High Cell mV
j. Fault 10, High Cell mV
The O2 CELL flashes once, pauses for
three seconds, and repeats (Figure 7-10).
1. Using a multimeter, measure across
TP1+ to TP2-.
2. If you measure 1.2 VDC, the cell wires,
either orange or green, have become
detached from the input.
3. One possible cause is connector J1.
The orange or green wire has come
loose from the crimped connection.
4. The platinum pad could also be at fault.
The pad could have broken free from
the back of the cell.
5. Replace heater strut per paragraph
6-7, Heater Strut Replacement. If
necessary, replace the cell flange
assembly per paragraph 6-8, Cell
Replacement.
7