Emerson Process Management OXYMITTER 4000 instruction manual Fault 12, EEprom Corrupt

Instruction Manual

IB-106-340C Rev. 4.1 July 2004

Hazardous Area Oxymitter 4000

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

CALIBRATION RECOMMENDED

l. Fault 12, EEprom Corrupt

Figure 8-14shows the electronic assembly

for a Hazardous Area Oxymitter 4000 with

a membrane keypad (upper view) and a

Hazardous Area Oxymitter 4000 with an

LOI (lower view).

Membrane Keypad. When Fault 12 is

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

detected, the O2 CELL LED flashes four
times, pauses for three seconds, and
repeats.
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

KEYPAD

Alarms

O2 Cell Bad

running, there is a hardware problem

on the microprocessor board.

4. If cycling the power does not clear the

alarm, see paragraph 9-4c,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.

LOI 37260029

Figure 8-14. Fault 12, EEprom Corrupt

8-16 Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management