Chromatographic Symptoms 3
Troubleshooting 39
FID Baseline Output Above 20 pA
• Verify the purity of the carrier and detector gas supply.
• Inspect the column for column bleed.
• Check the gas supply trap indicators/dates and ensure that
the traps are not expended.
• Verify that the detector was reassembled properly after
recent maintenance.
• Inspect the detector for contamination.
• Check that the FID leakage current is < 2.0 pA. (See “To
Measure FID Leakage Current” .)
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