User guide

117
Agilent 7890A Gas Chromatograph
Advanced User Guide
Agilent Technologies
6
Checking for Leaks
Preparing the GC for Maintenance 118
To Check for External Leaks 120
To Check for GC Leaks 121
Leaks in Capillary Column (Microfluidic) Fittings 122
To Perform a SS Inlet Pressure Decay Test 123
To Correct Leaks in the Split Splitless Inlet 127
To Perform a Multimode Inlet Pressure Decay Test 128
To Correct Leaks in the Multimode Inlet 132
To Perform a SS Inlet Pressure Decay Test 123
To Correct Leaks in the Packed Column Inlet 137
To Perform a COC Pressure Decay Test 138
To Correct Leaks in the Cool On-Column Inlet 141
To Perform a PTV Pressure Decay Test 142
To Correct Leaks in the PTV Inlet 146
To Perform a VI Pressure Decay Test 147
To Prepare the VI for a Closed System Leak Check 150
To Correct Leaks in the Volatiles Interface 151