115
5.1 Trouble shooting
5
(5)
Chromatogram and data
Problem Possible cause Solution Reference
No peak or extremely
small peaks
(In this case, peaks
may not be able to be
detected because of
too high noise.
Refer to "A lot of noise
or noise level is high".)
The Channel setting of detector
signal output does not
correspond to the Ch. Number
to which the signal cable is
actually connected.
Specify the correct Ch. number
[In case detector is FID]
Carrier gas is not being
supplied.
Supply carrier gas.
Carrier gas is leaking. Tighten the leaking
connections.
Split ratio is too large. Reduce the split ratio.
Sample concentration is low, or
the injection volume is too low.
Increase the sample
concentration or the injection
volume.
Inappropriate columns are
used.
Replace the columns with the
appropriate ones, considering
polarity, etc.
Column temperature is too low. Increase column temperature.
Signal cable of detector is
poorly connected.
Connect signal cable properly.
Detector is set to "Off". Set the detector to "On".
Detector parameters are set
inappropriately.
Increase range and attenuation
sensitivity.
Hydrogen flame is
extinguished. *1
Check hydrogen/air flow rate,
and then reignite.
Zero level is set far below "0". Press [MONIT] key to verify the
signal level, then press [ZERO
Adj] (PF menu) to execute zero
adjustment.
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