Emerson Process Management IM-106-340 instruction manual Alarms O2 Cell Bad, Fault 11, Bad Cell

Instruction Manual

IM-106-340, Rev. 4.0

May 2006

Figure 8-13. Fault 11, Bad Cell

	HEATER T/C
DIAGNOSTIC	HEATER	SW2
ALARMS	O2 CELL	ON
	CALIBRATION

CALIBRATION RECOMMENDED

Oxymitter 4000

Fault 11, Bad Cell

Figure 8-13shows 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 11 is detected, the O2 CELL flashes three times, pauses for three seconds, and repeats.

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 TP2 TP3 TP4

TP5

TP6

J1 RED YEL GRN ORG

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.

KEYPAD

Alarms

O2 Cell Bad

LOI 37260029

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.

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