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Instruction Manual
IB-106-340 Rev. 3.0
December 2003
8-16 Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management
Oxymitter 4000
Alarms
EEprom Corrupt
LOI
KEYPAD
DIAGNOSTIC
ALARMS
TEST
POINTS
HEATER T/C
HEATER
O2 CELL
CALIBRATION
CALIBRATION RECOMMENDED
O2 CELL mV +
O2 CELL mv -
HEATER T/C +
HEATER T/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
37260030
Figure 8-14. Fault 12, EEPROM Corrupt
l. Fault 12, EEPROM Corrupt
Figure 8-14 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 12 is de-
tected, the O2 CELL LED flashes four
times, pauses for three seconds, and re-
peats.
1. This alarm can occur if the EEPROM is
changed for a later version. At power
up, the EEPROM is not updated.
2. To correct this problem, power down
and then restore power. The alarm
should clear.
3. If the alarm occurs while the unit is
running, there is a hardware problem
on the microprocessor board.
4. If cycling the power does not clear the
alarm, see paragraph 9-4d, Electronic
Assembly Replacement.
LOI. When Fault 12 is detected, the LOI
displays the “EEprom Corrupt” message.
Refer to the comments and procedures in
paragraphs 1 through 4 above.