10.5
Measured values clearly incorrect
Possible errors
Possible causes
Action
Sample gas penetrated the area
before the SR-unit.
•
Gas pressure in gas duct too
high.
•
Purge air unit has failed or is
too weak.
see "Sample gas penetrating", page 86
.
Sample gas penetrates the purge air
compartment.
•
Gas pressure in gas duct too
high.
•
Purge air unit has failed or is
too weak.
see "Sample gas penetrating", page 86
.
•
Probe gap alignment incorrect.
Sample gas flow must not be
pressed into the purge air
openings.
b
Check installation.
Sample gas conditions do not
match, or no longer match, project
planning
•
Plant condition has changed.
b
Check sample gas conditions (temperature,
moisture, concentration etc.).
The device is not ready for opera‐
tion.
--
b
Check start-up.
b
Check status/error messages.
The device is not adjusted correctly. --
b
Check:
–
Were correct test gases used?
–
Are setpoint values correct?
b
If the answer to both questions is "Yes",
contact SICK Service to have a calibration
performed.
Analyzer is contaminated.
--
b
Report to manufacturer's Technical Service
or trained skilled persons.
Table 8: Measured values clearly incorrect
10.6
Sample gas penetrating
Possible errors
Possible causes
Action
Sample gas penetrates the area
before the SR-unit.
•
Gas pressure in gas duct too
high.
b
Check project planning.
•
Purge air unit has failed or is
too weak.
b
Check purge air unit.
b
Plan redundant purge air unit.
b
Strengthen the purge air unit.
Sample gas penetrates the GMP
probe.
•
Purge air unit has failed or is
too weak.
Table 9: Sample gas penetrating
10.7
Corrosion on measuring probe or flange
Possible errors
Possible causes
Action
Corrosion on measuring probe or
flange
Unsuitable materials
b
Check project planning.
Table 10: Corrosion on probe/ flange
10
TROUBLESHOOTING
86
O P E R A T I N G I N S T R U C T I O N S | GM32-Ex
8015558/YYJ8/V1.7/2016-07 | SICK
Subject to change without notice
