Emerson Process Management IM-106-340 Alarms Calib Failed, Fault 15, Last Calibration Failed

Instruction Manual

IM-106-340, Rev. 4.0

May 2006

Figure 8-17. Fault 15, Last Calibration Failed

Oxymitter 4000

Fault 15, Last Calibration Failed

Figure 8-17shows the electronic assembly for an Oxymitter 4000 with a membrane keypad (upper view) and an Oxymitter 4000 with an LOI (lower view).

HEATER T/C

DIAGNOSTIC HEATER

ALARMS O2 CELL CALIBRATION

CALIBRATION RECOMMENDED

SW2

ON

Membrane Keypad

When Fault 15 is detected, the CALIBRATION LED flashes three times, pauses for three

TEST

POINTS

INC INC

HIGH LOW GAS GAS

DEC DEC

O2 CELL mV +

O2 CELL mv - HEATER T/C + HEATER T/C -

CAL

TEST GAS + PROCESS - % O2

TP1	J1
TP2
TP3
TP4	RED YEL GRN ORG

TP5

TP6

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.

KEYPAD

Alarms

Calib Failed

LOI 37260033

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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