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Agilent Technologies 7890A - 1 Introduction; Where to Find Information; Chromatography Using a GC; The Front View of the Agilent 7890 A GC

Agilent Technologies 7890A
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Troubleshooting 3
Contents
1 Concepts and General Tasks
Concepts 10
How to troubleshoot using this manual 10
The [Status] key 10
Configurable Items to Always Keep Current 11
Column configuration 11
Automatic Liquid Sampler configuration 11
Gas configuration 11
To View the Run Log, Maintenance Log, and Event Log 12
Information to Obtain Before Calling Agilent for Service 13
2 ALS and Detector Symptoms
Plunger Errors 16
Vial Mishandled by ALS 17
Syringe Needle Bends During Injection into Inlet 18
FID Does Not Ignite 19
FID Ignitor Does Not Glow During Ignition Sequence 20
Corrosion in FID Collector and Ignitor Glow Plug 21
FPD Does Not Ignite 22
NPD Adjust Offset Process Fails 23
3 Chromatographic Symptoms
Retention Times Not Repeatable 26
Peak Areas Not Repeatable 27
Contamination or Carryover 28
Isolate the source 28
Check possible causes—all inlet and detector combinations 28
Larger Peaks Than Expected 30
Peaks Not Displayed/No Peaks 31
Table 1. Detector troubleshooting 31

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