11 | Troubleshooting
INFICON
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074-594-P1H Micro GC Fusion Operating Man-
ual
11 Troubleshooting
11.1 Symptom, Possible Cause, and Remedy Tables
The following tables identify common symptoms, possible causes, and remedies when
operating the instrument. For repair service and technical support contact information,
see Service and Technical Support [
299].
11.1.1 Common Chromatographic Problems
Symptom
Possible sources of error
Remedy
There is poor sensitivity
resulting in reduced area
counts for peaks.
The Sample Pump Time method
parameter is insufficient.
• Increase the Sample Pump Time to at least
fifteen seconds. If sufficient sample is
available, increase to between 30 to 60
seconds.
The Inject (ms) time method
parameter is insufficient.
• Increase the Inject (ms) time.
There is contamination in the
system.
• Conduct a bakeout to clean the columns.
Refer to Bakeout from System Status
[
The instrument not sufficiently
warmed up.
• Allow at least 3 minutes for Micro GC Fusion
to warm up.
There is an external leak.
• Check carrier gas lines using a leak detector
and tighten all fittings.
There is a loose fitting.
• Tighten all external fittings and connections,
including the carrier gas and sample inlet
fittings.
The carrier gas pressure is too
low.
• Carrier gas inlet pressure must be between
400-427 kPa (58-62 psi)
CAUTION! Exceeding 565 kPA (82 psi)
may damage Micro GC Fusion and require
factory repair.
The carrier gas contains
impurities.
• Ensure the carrier gas purity is between
99.995% and 99.9995%
• Add hydrocarbon/moisture/oxygen traps or
particulate filters to the carrier gas line to
improve purity.
• Replace the carrier gas cylinder.