Oxymitter 4000

 

HEATER T/C

 

DIAGNOSTIC

HEATER

SW2

ALARMS

O2 CELL

ON

 

 

CALIBRATION

 

CALIBRATION RECOMMENDED

Instruction Manual

IB-106-340 Rev. 3.0

December 2003

k. 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 de-

tected, the O2 CELL flashes three times,

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

pauses for three seconds, and repeats.

1.

The bad cell alarm activates when the

 

cell exceeds the maximum resistance

 

value.

2.

The cell should be replaced. See para-

 

graph 9-4i,Cell Replacement, for cell

 

replacement instructions.

KEYPAD

Alarms

O2 Cell Bad

LOI

37260029

Figure 8-13. Fault 11, Bad Cell

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.

Rosemount Analytical Inc. A Division of Emerson Process Management

Troubleshooting 8-15