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9 - 2
PN
07
4-
51
9-
P1
C
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
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
Malfunctioning TCD
Contact
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
Malfunctioning sample pump Listen for the noise from the pump when
taking a sample. If there is no noise, contact
Malfunctioning TCD
Contact
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
Summary of Contents for 3000 Micro GC
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