7Diagnostics
Operation Manual 115
Automated testing
The GC performs continuous, automated testing of the following items. If a failure occurs, an
alert appears on the diagnostic tab. See Figure 27. In addition, an entry is made in the
appropriate log.
See below for a list of the continuous monitoring dialogs:
Detector:
• Supply voltage
• ADC (analog to digital converter) references
• FID flameout
• NPD bead open/short
• Igniter open/short
• Collector short
• Electrometer not plugged in
• TCD filament open or short
• TCD switching valve open or short
• FPD flameout
EPC (Electronic Pneumatic Control) - Inlets, detectors, and other modules.
ADC (analog to digital converter) references
Actuator movements
Thermal:
• Sensor open/short
• Missing heater
• Wrong heater
• Heater current:
• Quiescent
• Leakage
Configuration Mismatch
Self-guided diagnostics
The GC offers several useful diagnostic checks to use when troubleshooting issues with the
GC or method. See below for a list of self-guided diagnostic tests available:
Inlet tests:
• Leak & Restriction test
• Gas Supply Pressure test
• Split Vent Restriction test
• Pressure Decay test
• Septum Purge test
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