Troubleshooting 5
Oven Temperature Never Cools Down/Cools Very Slowly 56
Oven Never Heats Up 57
Temperature Never Becomes Ready 58
Cannot Set a Flow or Pressure 59
A Gas Does Not Reach Setpoint Pressure or Flow 60
A Gas Exceeds Pressure Setpoint or Flow 61
The Inlet Pressure or Flow Fluctuates 62
Cannot Maintain a Pressure as Low as the Setpoint on a Split Inlet 63
The Measured Column Flow Does Not Equal the Displayed Flow 64
FID Does Not Ignite 65
FID Ignitor Does Not Glow During Injection Sequence 66
NPD Adjust Offset Process Fails 67
FPD Does Not Ignite 68
5 Shutdown Symptoms
Column Shutdown 70
Hydrogen Shutdown 71
Thermal Shutdowns 72
6 Nonfunctional GC Symptoms
GC Does Not Turn On 74
PC Cannot Communicate with GC 75
7 Checking for Leaks
Leak Check Tips 78
To Check for External Leaks 79
To Check for GC Leaks 81
Leaks in Capillary Flow (Microfluidic) Fittings 82
8 Troubleshooting Tasks
To Measure a Column Flow 84
Measuring FID, TCD, uECD, and FPD column flow 84
Measuring NPD column flow 85
To Measure a Split Vent or Septum Purge Flow 87
To Measure a Detector Flow 89
Measuring FID, TCD, uECD, and FPD flows 89
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