Agilent Technologies 7890A Troubleshooting Manual page 44
Gas chromatograph
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Also See for 7890A:
- Operating manual (84 pages) ,
- Quick reference (34 pages) ,
- Safety manual (20 pages)
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3
Chromatographic Symptoms
FID Baseline Output Above 20 pA
44
• 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".)
Troubleshooting
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