Emerson Rosemount Oxymitter 4000 Instruction Manual page 113

Instruction Manual
IM-106-340, Rev. 4.3
July 2017
Figure 8-17. Fault 15, Last Calibration Failed
Oxymitter 4000
Fault 15, Last Calibration Failed
Figure 8-17 shows the electronic assembly for
an Oxymitter 4000 with a membrane keypad
(upper view) and an 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 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.
8-21