3
Troubleshooting the MSD
Chromatographic symptoms
73
Baseline wanders
•
Insufficient carrier gas supply pressure*
•
Malfunctioning flow or pressure regulator*
•
Intermittent leak in the injection port*
* These could cause a fault condition in the GC that would prevent the GC from
operating.
Retention times for all peaks drift – shorter
•
Column has been shortened
•
Initial oven temperature was increased
•
Column is getting old
Retention times for all peaks drift – longer
•
Column flow has been reduced
•
Initial oven temperature was decreased
•
Active sites in the sample path
•
Leaks in the injection port*
* This could cause a fault condition in the GC that would prevent the GC from
operating.
Summary of Contents for 5973
Page 1: ...H Hardware Manual HP 5973 Mass Selective Detector ...
Page 3: ...HP 5973 Mass Selective Detector Hardware Manual ...
Page 25: ...1 Installing GC Columns To condition a capillary column 25 ...
Page 30: ...30 ...
Page 37: ...2 Operating the MSD To view MSD analyzer temperature and vacuum status 37 ...
Page 39: ...2 Operating the MSD To set monitors for MSD temperature and vacuum status 39 ...
Page 41: ...2 Operating the MSD To set the MSD analyzer temperatures 41 ...
Page 43: ...2 Operating the MSD To set the interface temperature from the ChemStation 43 ...
Page 51: ...2 Operating the MSD To remove the MSD covers 51 Upper cover Lower cover ...
Page 92: ...92 ...
Page 105: ...4 Maintaining the MSD To drain the foreline pump 105 Fill cap Drain plug Pump motor ...
Page 113: ...4 Maintaining the MSD To separate the MSD from the GC 113 ...
Page 121: ...4 Maintaining the MSD To reconnect the MSD to the GC 121 ...
Page 141: ...4 Maintaining the MSD To lubricate the side plate O ring 141 Side plate O ring ...
Page 159: ...4 Maintaining the MSD To remove a filament 159 Filament 2 Filament 1 ...
Page 161: ...4 Maintaining the MSD To reinstall a filament 161 Filament 2 Filament 1 ...
Page 210: ...210 ...
Page 214: ...214 ...
Page 232: ...232 7 Analyzer Analyzer heaters and radiators ...
Page 280: ...280 ...
Page 294: ...294 Index ...
Page 296: ...294 Chapter ...
Page 297: ...H Manual Part Number G1099 90027 Copyright 1998 Hewlett Packard Printed in USA 11 98 ...