Colibrick A/D Converter
5 Troubleshooting
5.3.6 No peaks in the chromatogram
Fig 33: No peaks in the chromatogram
There is no response from the detector at all. There are four most common
causes.
▌Reason 1: The problem with A/D converter connection to the detector.
Solution:
Check connections and cabels. For more information see
▌Reason 2: The analytical conditions problem.
Solution:
Check the system for wrong injection or wrong conditions (temperature, FID flame,
etc).
▌Reason 3: The chromatograph problem.
Solution:
If a voltmeter is available, connect it to the chromatograph and check voltage
changes during an analysis with a real sample.
▌Reason 4: The A/D converter failure.
Solution:
You can perform a simple test. Connect an AA battery to white and red cable and
switch the range of the A/D converter to 10 V and check whether the voltage is
about 1.5 V.
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