Figure 8-16. Fault 14, Invalid Constant - Emerson Oxymitter 4000 Instruction Manual

Instruction Manual
IB-106-340 Rev. 3.0
December 2003
DIAGNOSTIC
ALARMS
CALIBRATION RECOMMENDED
TEST
POINTS
INC INC
HIGH LOW
GAS GAS
DEC DEC
KEYPAD
Alarms
O2 Cell Bad

Figure 8-16. Fault 14, Invalid Constant

8-18 Troubleshooting
HEATER T/C
HEATER
SW2
O2 CELL
CALIBRATION
O2 CELL mV +
TP1
O2 CELL mv -
TP2
HEATER T/C +
TP3
HEATER T/C -
TP4
CAL
TEST GAS +
TP5
PROCESS -
TP6
% O2
LOI
37260032
n. Fault 14, Invalid Constant
Figure 8-16 shows the electronic assembly
for an Oxymitter 4000 with a membrane
keypad (upper view) and an Oxymitter 4000
with an LOI (lower view).
Membrane Keypad. When Fault 14 is de-
tected, the CALIBRATION LED flashes
J1
twice, pauses for three seconds, and re-
peats.
1. After a calibration has been performed,
2. If the cell constant value is outside of
3. Power down the Oxymitter 4000 and
4. Replace the cell per paragraph 9-4i,
LOI. When Fault 14 is detected, the LOI
displays the "O2 Cell Bad" message. Refer
to the comments and procedures in para-
graphs 1 through 4 above.
Rosemount Analytical Inc.
Oxymitter 4000
the electronics calculates a cell con-
stant value.
the range, -4 mV to 10 mV, the alarm
will activate. See paragraph 9-2, Cali-
bration, and verify the last calibration
was performed correctly.
remove it from the stack.
Cell Replacement.
A Division of Emerson Process Management