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Instruction Manual
IB-106-340 Rev. 2.4
April, 2001
7-16 Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management
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
22220044
Figure 7-13. Fault 13, Invalid Slope
m. Fault 13, Invalid Slope
The CALIBRATION LED flashes once,
pauses for three seconds, and repeats
(Figure 7-13).
1. During a calibration, the electronics
calculates a slope value. If the value of
the slope is less than 35 mV/deg or
more than 52 mV/deg, the slope alarm
will be active until the end of the purge
cycle.
2. See paragraph 6-2, Calibration. Verify
the calibration by carefully repeating it.
Ensure the calibration gases match the
calibration gas parameters. If you at-
tach a multimeter to TP1+ and TP2-,
sample gas measurements are:
8% O
2
≈ 23 mV
0.4% O
2
≈ 85 mV
3. Power down the Oxymitter 4000 and
remove it from the stack.
4. Replace the cell per paragraph 6-8,
Cell Replacement.