Emerson Process Management OXYMITTER 4000 Alarms ADC Error, Fault 4, A/D Comm Error

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

d.Fault 4, A/D Comm Error

Membrane Keypad. When Fault 4 is detected, the HEATER T/C LED flashes four times, pauses for three seconds, and repeats (Figure 8-6).

1. Call the factory for assistance.

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

KEYPAD

LOI. When Fault 4 is detected, the LOI displays the “ADC Error” message.

1. Call the factory for assistance.

Alarms

ADC Error

LOI 37260022

Figure 8-6. Fault 4, A/D Comm Error

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