Emerson Process Management OXYMITTER 4000 - Manual (Page 112)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
8-16 Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management
Hazardous Area Oxymitter 4000
Alarms
O2 Cell Bad
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
37260029
Figure 8-14. Fault 12, EEprom Corrupt
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.