Emerson ib-106-340cdr, oxymitterdr hazardous area in-siu oxygen probe Hazardous Area Oxymitter DR

SYMPTOM

CHECK

FAULT

REMEDY

Heater is hot and

Recorder chart

Recorder failure

See Recorder Instruction

T/C mV output is at

Manual.

setpoint ±0.2 mV

Cell mV input to elec-

No cell mV at probe

Replace cell or return

tronics and cell mV at

when test gas applied

probe to Rosemount.

probe head

Probe cell mV OK but no

Check out cable con-

input to electronics

nection.

Cell mV satisfactory both

Check electronics pack-

at junction box and input

age.

to electronics - failure of

electronics

2.

System responds to

oxygen concentra-

tion changes but has

incorrect indication

Good response, with

Recorder or remote

Calibration error

Recalibrate recorder or

incorrect indication

indicator

indicator. Reference Re-

corder Instruction Man-

ual.

System calibration

Calibration error

Recalibrate system. Re-

place cell if necessary.

Probe mounting and

Air ingress into duct

Stop air leaks or resite

condition of duct

probe.

Cell mV input to elec-

Failure of electronics

Check electronics pack-

tronics

age.

3. Probe does not give

Test gas input port

Blocked port

Clean port. If the flue

accurate indicationof

gas is condensing in the

applied test gas

test gas line, insulate the

back of the probe. Make

sure that the test gas

line is capped between

calibrations, or a check

valve is installed.

Ceramic diffusion ele-

Diffusion element

Replace diffusion ele-

ment broken

cracked, broken, or

ment.

missing

4. Probe takes a long

Plugged diffusion ele-

Plugged diffusion ele-

Change diffusion ele-

time to return to flue

ment

ment

ment or snubber diffu-

gas value after

sion element.

calibration gas is

turned off

5.

Probe heater

Proper voltage heater is

Wrong heater

Change heater to proper

temperature unstable

installed

voltage.

5-2 Troubleshooting

Rosemount Analytical Inc. A Division of Emerson Process Management