Npd Adjust Offset Process Fails - Agilent Technologies 7890 Series Troubleshooting Manual

NPD Adjust Offset Process Fails

Agilent 7890 Series Troubleshooting
• Inspect the jet to see if it is clogged. (See
Plugged NPD Jet.)
• Measure the actual detector flows. (See
Detector Flow.) If the hydrogen or makeup flows are zero or
much lower than the displayed flow, suspect a plugged jet.
• Check the condition of the bead.
• Verify that the flow settings are correct. See
temperatures, and bead
• If the process still fails, there could be a large leak in the
system. This causes measured flow rates to be different from
actual flow rates. Thoroughly leak check the whole system,
especially the detector column fitting. (See
Leaks.)
• Set the equilibration time to 0.0.
GC Not Ready Symptoms
To Check for a
To Measure a
Replace if necessary.
Flows,
information.
Checking for
4
105