Agilent 7890 Series Troubleshooting 5
Low Peak Area or Height (Low Sensitivity) 67
To Resolve Low Sensitivity with an FID 68
FID Flame Goes Out During a Run and Attempts to Reignite 70
FID Baseline Output Above 20 pA 72
FID Baseline Output at Maximum (~8 Million) 73
FPD Flame Goes Out During a Run and Attempts to Reignite 74
FPD Quenching/Repeatability 75
FPD Output Too High or Too Low 76
FPD Low Peak Areas 77
FPD Large Peak Width at Half-Height 78
FPD Baseline Output High, > 20 pA 79
NPD Solvent Quenching 80
NPD Response Low 81
NPD Baseline Output > 8 million 83
NPD Adjust Offset Process Not Functioning Properly 84
NPD Low Selectivity 85
Negative Peaks Seen with TCD 86
TCD Baseline Has Dampened Sinusoidal Noise Trailing Peaks (Ringing
Baseline) 87
TCD Peaks Have Negative Dip on Tail 88
4 GC Not Ready Symptoms
GC Never Becomes Ready 90
Flow Never Becomes Ready 91
Oven Temperature Never Cools Down/Cools Very Slowly 92
Oven Never Heats Up 93
Temperature Never Becomes Ready 94
Cannot Set a Flow or Pressure 95
A Gas Does Not Reach Setpoint Pressure or Flow 96
A Gas Exceeds Pressure Setpoint or Flow 97
The Inlet Pressure or Flow Fluctuates 98
Cannot Maintain a Pressure as Low as the Setpoint on a Split Inlet 99
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