Figure 8-14. Fault 12, Eeprom Corrupt - Emerson Rosemount Analytical Oxymitter 4000 Instruction Manual

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
DIAGNOSTIC
ALARMS
CALIBRATION RECOMMENDED
TEST
POINTS
INC INC
HIGH LOW
GAS GAS
DEC DEC
KEYPAD
Alarms
O2 Cell Bad

Figure 8-14. Fault 12, EEprom Corrupt

8-16 Troubleshooting
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
LOI
37260029
Hazardous Area Oxymitter 4000
l. Fault 12, EEprom Corrupt
Figure 8-14 shows the electronic assembly
for a Hazardous Area Oxymitter 4000 with
a membrane keypad (upper view) and a
Hazardous Area Oxymitter 4000 with an
LOI (lower view).
Membrane Keypad. When Fault 12 is
detected, the O2 CELL LED flashes four
times, pauses for three seconds, and
repeats.
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 9-4c, 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.
Rosemount Analytical Inc. A Division of Emerson Process Management