Emerson Process Management IB106-340 instruction manual Fault 13, Invalid Slope

Instruction Manual

IB-106-340 Rev. 2.4 April, 2001

Oxymitter 4000

HEATER T/C

DIAGNOSTIC HEATER

ALARMS O2 CELL CALIBRATION

CALIBRATION RECOMMENDED

SW2

ON

m. Fault 13, Invalid Slope

The CALIBRATION LED flashes once,

pauses for three seconds, and repeats

(Figure 7-13).

1. During a calibration, the electronics

calculates a slope value. If the value of

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	J1
TP2
TP3
TP4	RED YEL GRN ORG

TP5

TP6

22220044

the slope is less than 35 mV/deg or

more than 52 mV/deg, the slope alarm

will be active until the end of the purge

cycle.

2. See paragraph 6-2,Calibration. Verify

the calibration by carefully repeating it.

Ensure the calibration gases match the

calibration gas parameters. If you at-

tach a multimeter to TP1+ and TP2-,

sample gas measurements are:

8% O2 ≈ 23 mV

Figure 7-13. Fault 13, Invalid Slope

	0.4% O2 ≈ 85 mV
3.	Power down the Oxymitter 4000 and
	remove it from the stack.
4.	Replace the cell per paragraph 6-8,
	Cell Replacement.

7-16 Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management