Agilent Technologies 7890 Series Troubleshooting

104 Agilent 7890 Series Troubleshooting
4 GC Not Ready Symptoms
FID or NPD Measured Hydrogen and Makeup Gas Flows Much Less Than
Setpoint
• Check for a clogged or partially clogged jet. A clogged jet
creates backpressure. Since the flow module uses pressure
control, the increased backpressure simulates proper flow.
The actual flow rate will drop but the GC remains functional.
See:
“To Check for a Plugged FID Jet”
“To Check for a Plugged NPD Jet”
• Check for a column fitting leak at the detector base.
• Replace the FID or NPD jet.

Agilent Technologies 7890 Series Specifications

General

Brand	Agilent Technologies
Model	7890 Series
Category	Laboratory Equipment
Language	English