Agilent Technologies 7890A Troubleshooting Manual page 59

Agilent 7890A Gas Chromatograph
Troubleshooting
4
GC Not Ready Symptoms
GC Never Becomes Ready 60
Flow Never Becomes Ready 61
Oven Temperature Never Cools Down/Cools Very Slowly 62
Oven Never Heats Up 63
Temperature Never Becomes Ready 64
Cannot Set a Flow or Pressure 65
A Gas Does Not Reach Setpoint Pressure or Flow 66
A Gas Exceeds Pressure Setpoint or Flow 67
The Inlet Pressure or Flow Fluctuates 68
Cannot Maintain a Pressure as Low as the Setpoint on a Split Inlet 69
The Measured Column Flow Does Not Equal the Displayed Flow 70
FID Does Not Ignite 71
FID Ignitor Does Not Glow During Injection Sequence 72
NPD Adjust Offset Process Fails 73
FPD Does Not Ignite 74
This section includes faults and symptoms that will occur
when the GC is on but cannot perform analyses. This is
indicated by a "Not Ready" warning, by fault messages, or by
other symptoms.
Agilent Technologies
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