Emerson Process Management IB106-340 instruction manual Fault 14, Invalid Constant

Oxymitter 4000

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

CALIBRATION RECOMMENDED

Instruction Manual

IB-106-340 Rev. 2.4

April, 2001

n. Fault 14, Invalid Constant

The CALIBRATION LED flashes twice,

pauses for three seconds, and repeats

(Figure 7-14).

1. After a calibration has been performed,

the electronics calculates a cell con-

stant value.

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

REDYELGRNORG

22220045

2.	If the cell constant value is outside of
	the range, -4 mV to 10 mV, the alarm
	will activate. See paragraph 6-2,Cali-
	bration, and verify the last calibration
	was performed correctly.
3.	Power down the Oxymitter 4000 and
	remove it from the stack.
4.	Replace the cell per paragraph 6-8,
	Cell Replacement.

Figure 7-14. Fault 14, Invalid Constant

7

Rosemount Analytical Inc. A Division of Emerson Process Management Troubleshooting 7-17