Rosemount Oxymitter 5000 - Page 103

Instruction Manual
IM-106-350C, Rev 2.2
July 2008
8-21
Hazardous Area Oxymitter 5000
Figure 8-17. Fault 15, Last Calibration Failed
Fault 15, Last Calibration Failed
Figure 8-17 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 15 is detected, the CALIBRATION
LED flashes three times, pauses for three
seconds, and repeats.
1. The last calibration failed alarm activates
when the slope and constant values
calculated are out of range and the unit
reverts to using the previous calibration
values.
2. The cell should be replaced. See "Cell
Replacement" in Section 9: Maintenance
and Service, for cell replacement
instructions.
LOI
When Fault 15 is detected, the LOI displays the
"Calib Failed" message. Refer to the comments
in paragraphs 1 and 2 above.
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
38740058
LOI
KEYPAD
Alarms
CalibFailed