Troubleshooting 5
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
5 Shutdown Symptoms
Column Shutdowns 76
Hydrogen Shutdowns 77
Thermal Shutdowns 79
6 GC Power On and Communication Symptoms
GC Does Not Turn On 82
GC Turns On, Then Stops During Startup (During Self-Test) 83
PC Cannot Communicate with GC 84
7 Checking for Leaks
Leak Check Tips 86
To Check for External Leaks 87
To Check for GC Leaks 89
Leaks in Capillary Flow Fittings 90
8 Troubleshooting Tasks
To Measure a Column Flow 92
Measuring FID, TCD, uECD, and FPD column flow 92
Measuring NPD column flow 94
To Measure a Split Vent or Septum Purge Flow 96
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