Emerson Process Management OXYMITTER 4000 - Manual (Page 115)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
Rosemount Analytical Inc. A Division of Emerson Process Management Troubleshooting 8-19
Hazardous Area Oxymitter 4000
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
37260033
Alarms
Calib Failed
LOI
KEYPAD
Figure 8-17. Fault 15, Last Calibration Failed
o. Fault 15, Last Calibration Failed
Figure 8-17 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 15 is
detected, the CALIBRATION LED flashes
three times, pauses for three seconds, and
repeats.
1. The last calibration failed alarm acti-
vates 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 para-
graph 9-4h, Cell Replacement, 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.
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