Figure 5-13. Fault 13, Invalid Slope - Emerson Oxymitter 5000 Instruction Manual

Oxymitter 5000
DIAGNOSTIC
ALARMS
CALIBRATION RECOMMENDED
TEST
POINTS
INC INC
HIGH LOW
GAS GAS
DEC DEC

Figure 5-13. Fault 13, Invalid Slope

Rosemount Analytical Inc. A Division of Emerson Process Management
HEATER T/C
HEATER
SW2
O2 CELL
CALIBRATION
J1
O2 CELL mV +
TP1
O2 CELL mv -
TP2
HEATER T/C +
TP3
HEATER T/C -
TP4
CAL
TEST GAS +
TP5
PROCESS -
TP6
% O2
28550025
Instruction Manual
m. Fault 13, Invalid Slope
The CALIBRATION LED flashes once,
pauses for three seconds, and repeats (Fig-
ure 5-13).
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 4-2, 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:
≈ 23 mV
8% O
2
≈ 85 mV
0.4% O
2
3. Power down the Oxymitter 5000 and
remove it from the stack.
4. Replace the cell per paragraph 4-8,
Cell Replacement.
IB-106-350 Rev. 1.2
April 2001
Troubleshooting 5-15
5