Operating Manual Instruction Manual

9 - 10
PN 074-519-P1C
3000 Micro GC Operating Manual
9.2 Common Chromatographic and Method Problems
This section will provide some guidance to help diagnose common operational
problems. If a diagnosis cannot be made, consult:
 074-538 EZ IQ Operating Manual
 EZ IQ Online Help
 Chapter 10, Service and Technical Support
This section is divided into two main topics:
1 Chromatographic Problems
2 Method Problems
For communication and hardware problems, consult Table 9-3 on page 9-8 and
Table 9-4 on page 9-9. If problems still occur, contact INFICON.
9.2.1 Chromatographic Problems
This section will overview unexpected chromatographic behavior and provide a
possible cause and remedy. Problems may arise from:
 Electronic or mechanical failure
 Contaminants in gas lines, injectors, columns and detectors
 Incorrect or inappropriate set points
 Leaks, bleed, or other chromatographic difficulties
These conditions often interact. For example, baseline problems may arise from
any combination of the conditions. Accordingly, this section is organized by
symptoms with reference to most possible causes.
9.2.1.1 Baseline Symptoms
9.2.1.1.1 Baseline Position
Baseline position changes suddenly during a run. This can result from:
 Detector filament failure
 Valve failure
 EPC failure
Inspect EZ IQ screens for highlighted warnings, or changed run settings. Make any
necessary changes. Re-run sample.