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Series 580 TCD Gas Chromatograph
September 2017, Rev. 5
57
Symptom
Cause
Remedy
Carrier gas leaking at
Locate and correct leak.
injector septum, column
fi ttings, etc.
Column packing bleeding.
Condition column; Operate
column at a lower
temperature; Replace column
or packing. Some packing
materials cannot be operated
at elevated temperatures
without diffi culty. Drifting may
occur even on well
conditioned columns in
which carrier gas fl ow rates
have been carefully optimized.
Poor carrier gas
Check carrier gas supply
regulation.
pressure; Check carrier gas
regulator and fl ow controller
to ensure proper operation.
Poor grade of carrier
Replace cylinder. Carrier gas
gas or contaminated
should be “zero grade” or
cylinder.
better. Consult local gas
supplier.
Sinusoidal a baseline drift.
Detector-oven temp.
Check temperature sensing
controller or sensor defective
probe for resistance (approx.
or improperly installed.
100
at room temp.) and
proper installation.
Column oven temperature
Same as above.
controller or sensor defective
or improperly installed.
Poor instrument location.
Move instrument to a location
where it is not subject to drafts
and/or ambient temperature
changes.
Carrier gas fl ow regulator
Replace carrier gas fl ow
defective.
regulator.
Carrier gas supply pressure
Replace carrier gas cylinder.
too low to allow regulator to
control properly.
Summary of Contents for 580 series
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