Instruction Manual

IB-106-340 Rev. 3.0

December 2003

 

HEATER T/C

 

DIAGNOSTIC

HEATER

SW2

ALARMS

O2 CELL

ON

 

 

CALIBRATION

 

CALIBRATION RECOMMENDED

Oxymitter 4000

l. Fault 12, EEPROM Corrupt

Figure 8-14shows 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 12 is de-

tected, the O2 CELL LED flashes four

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

times, pauses for three seconds, and re-

peats.

1.

This alarm can occur if the EEPROM is

 

changed for a later version. At power

 

up, the EEPROM is not updated.

2.

To correct this problem, power down

 

and then restore power. The alarm

 

should clear.

3.

If the alarm occurs while the unit is

 

running, there is a hardware problem

KEYPAD

Alarms

EEprom Corrupt

LOI

37260030

Figure 8-14. Fault 12, EEPROM Corrupt

on the microprocessor board.

4. If cycling the power does not clear the

alarm, see paragraph 9-4d,Electronic

Assembly Replacement.

LOI. When Fault 12 is detected, the LOI displays the “EEprom Corrupt” message. Refer to the comments and procedures in paragraphs 1 through 4 above.

8-16 Troubleshooting

Rosemount Analytical Inc. A Division of Emerson Process Management