Rosemount Oxymitter 5000 - Page 99

Instruction Manual
IM-106-350C, Rev 2.2
July 2008
8-17
Hazardous Area Oxymitter 5000
Figure 8-13. Fault 11, Bad Cell
Fault 11, Bad Cell
Figure 8-13 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 11 is detected, the O2 CELL flashes
three times, pauses for three seconds, and
repeats.
1. The bad cell alarm activates when the cell
exceeds the maximum resistance value.
2. The cell should be replaced. See "Cell
Replacement" in Section 9: Maintenance
and Service, for cell replacement
instructions.
LOI
When Fault 11 is detected, the LOI displays the
"O2 Cell Bad" message. Refer to the comments
and procedures in paragraphs 1 and 2 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
38740054
Alarms
O2CellBad