Operating Manual Instruction Manual

9 - 2
PN 074-519-P1C
3000 Micro GC Operating Manual
Poor sensitivity (continued) Impure carrier gas 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.
Internal leak Contact INFICON.
Malfunctioning column or
injector
Check the flow out of the analytical and
reference vents on the back of
3000 Micro GC. If there is no flow from either
or both vents, contact INFICON.
Malfunctioning TCD Contact INFICON.
Flat line chromatogram Inject Time set to 0 ms. In EZ IQ, change the Inject Time to a value
other than 0 ms.
Sample Pump turned off In EZ IQ, ensure that the Sample Pump
checkbox is selected and set for at least 15
seconds.
Malfunctioning column or
injector
Check the flow coming out of the
3000 Micro GC analytical and reference
vents. If there is no flow from either or both
vents, contact INFICON.
Malfunctioning sample pump Listen for the noise from the pump when
taking a sample. If there is no noise, contact
INFICON.
Malfunctioning TCD Contact INFICON.
Missing peak Backflush Time set too
early (if applicable)
Increase the Backflush Time until all peaks of
interest appear on the chromatogram.
Saturated peak Inject Time too long In EZ IQ, shorten the Inject Time.
Injector Temperature too
high
In EZ IQ, lower the Injector Temperature.
Detector Sensitivity set to
High
In EZ IQ, set the Detector Sensitivity to
Standard.
Table 9-1 Common chromatographic problems (continued)
Symptom Possible Cause Remedy