Agilent Technologies 7890A Troubleshooting Manual page 45

FPD Flame Goes Out During a Run and Attempts to Reignite
Troubleshooting
If the flame goes out during a run, do the following:
• Check the GC system for leaks, especially at the detector
column fitting. (See "Checking for Leaks".)
• Verify the detector temperature is set
• Ensure that condensation in the vent tube is not dripping
back into the detector. The flexible plastic vent tube must
run from the detector into a container, without sagging,
in order to properly drain water condensate. Keep the
open tube end out of the water in the container.
If the FPD flame goes out and then reignites, do the
following:
• Verify that the Lit offset setting is lower than the normal
baseline.
• Check for leaks. (See "Checking for Leaks".)
• Check the flow settings, then measure the actual detector
flows. (See "To Measure a Detector Flow".)
Chromatographic Symptoms
≥
200 °C.
3
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