Agilent Technologies 7890A Troubleshooting Manual page 3

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