Rosemount Oxymitter 5000 - Page 100

8-18
Instruction Manual
IM-106-350C, Rev 2.2
July 2008
Hazardous Area Oxymitter 5000
Figure 8-14. Fault 12, EEprom Corrupt
Fault 12, EEprom Corrupt
Figure 8-14 shows the electronic assembly for a
Hazardous Area Oxymitter 5000 with a
membrane keypad (upper view) and a
Hazardous Area Oxymitter 5000 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 "Electronic Assembly
Replacement" in Section 9: Maintenance
and Service.
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.
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
38740055
Alarms
O2CellBad