Inficon Micro GC Fusion 2-Module Operating Manual page 286

11 | Troubleshooting
Symptom
Calibration is poor.
Concentration amounts
are not as expected
Inverted peaks are
present or large, broad
humps are present in the
chromatogram
286 / 319
Possible sources of error
The web browser requires a
cache clear.
Micro GC Fusion requires a
restart.
There is contamination or low
volume in the calibration or
carrier gas.
Micro GC Fusion requires a
restart.
There is an external leak.
Integration events are not
optimized.
The Backflush Time method
parameter is set too early (if
applicable).
The carrier gas is incorrect/
mislabeled.
The carrier gas contains
impurities.
There are carryover peaks from
a previous run.
Remedy
• Clear the web browser's cache, then refresh
the web browser.
• Restart Micro GC Fusion. Refer to Shutdown
Procedure [} 251].
• 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.
• Ensure there are no contaminants in the
calibration gas.
• Ensure that there is an adequate supply of
calibration gas.
• Restart Micro GC Fusion. Refer to Shutdown
Procedure [} 251].
• Check carrier gas and calibration gas lines
using a leak detector and ighten all fittings.
• Ensure all of the peaks of interest are
identified and fully integrated. Refer to
Integration Parameters [} 201].
• Increase the Backflush Time until all peaks
of interest appear on the chromatogram.
• Check the carrier gases and ensure that
each carrier gas is connected to the correct
inlet and configured properly in the user
interface.
• Check carrier gas lines using a leak detector
and tighten all fittings.
• 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.
• If broad and sporadic peaks appear, it could
indicate carryover from a late-eluting
compound. Extend the Hold Time or
074-594-P1H Micro GC Fusion Operating Man-
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ual