Agilent Technologies 7890A Troubleshooting Manual page 55
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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Negative Peaks Seen with TCD
Troubleshooting
• Verify that the correct gas type is being used.
• Check for a leak in the system, especially at the detector
column fitting. (See "Checking for Leaks".)
• Consider sensitivity to analytes.
• Check the flow settings, then measure the actual detector
flows. (See "To Measure a Detector Flow".)
Chromatographic Symptoms
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