Instruction Manual

IB-106-340 Rev. 2.4

April, 2001

 

HEATER T/C

 

DIAGNOSTIC

HEATER

SW2

ALARMS

O2 CELL

ON

 

 

CALIBRATION

 

CALIBRATION RECOMMENDED

Oxymitter 4000

i. Fault 9, High Heater Temp

The HEATER LED flashes five times,

pauses for three seconds, and repeats

(Figure 7-9).

1. If the thermocouple produces a voltage

in excess of approximately 30.7 mV,

the high heater temp alarm activates.

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

22220040

2.

The 4-20 mA signal returns to the de-

 

fault value (4 or 20 mA).

3.

This alarm is self-clearing. When tem-

 

perature control is restored and the

 

thermocouple voltage returns to the

 

normal range, the alarm clears.

4.

If the temperature continues to rise, the

 

next alarm will be the high high heater

 

temp alarm.

Figure 7-9. Fault 9, High Heater Temp

7-12 Troubleshooting

Rosemount Analytical Inc. A Division of Emerson Process Management

Page 110
Image 110
Emerson Process Management IB106-340 instruction manual Fault 9, High Heater Temp