Troubleshooting Tasks 8
Agilent 7890 Series Troubleshooting 195
To Verify That the FID Flame Is Lit
To verify that the FID flame is lit, hold a mirror or other
reflective surface over the collector exhaust. Steady
condensation indicates that the flame is lit.
Typically the FID output will be between 5.0 and 20.0 pA when
lit and < 2.0 pA when not lit.
If the flame does not light, do the following:
• Verify that the detector temperature is above 150 °C. Agilent
recommends operating the FID
300 °C.
• Verify correct detector flows.
• Inspect the jet for contamination.
• Verify that the jet is installed correctly.
• Check the column connections for leaks.
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