Agilent Technologies 6890 Series Service Manual page 7

Contents
Split modes .................................................................................................. 3
Septum head installed ........................................................................ 3
Septumless head installed.................................................................. 4
Pulsed split modes .............................................................................. 5
Splitless modes............................................................................................ 6
Pulsed splitless mode ......................................................................... 8
Solvent vent mode ...................................................................................... 9
Stage 1: Sample and vent ................................................................... 9
Stage 2: Sample transfer................................................................... 11
Stage 3: Purge and cleanup .............................................................. 12
Replacement procedures ......................................................................... 13
Replacing the PTV inlet, pneumatics, and manifold..................... 13
Replacing the PTV with cooling assembly..................................... 16
Replacing the CO
Replacing the PTV manifold assembly ........................................... 19
Removing both the manifold and plumbing assemblies .............. 22
Replacing the plumbing assemblies ............................................... 23
Replacing a gang fitting restrictor or O-ring.................................. 25
Replacing the PTV thermocouple PCB .......................................... 25
Replacing the filter............................................................................ 26
Replacing the inlet adapter.............................................................. 27
Installing the column ........................................................................ 28
Removing the septumless head....................................................... 29
Cleaning the septumless head ......................................................... 30
Replacing the Teflon ferrule ............................................................ 32
Removing/replacing the septum head ............................................ 33
Replacing the septum ....................................................................... 35
Replacing the liner ............................................................................ 35
Diagnostics ................................................................................................ 38
Shutdown behavior........................................................................... 38
Leak testing................................................................................................ 39
Preparation ........................................................................................ 39
Performing the leak test................................................................... 40
4 of 24
or LN inlet cryo assembly.............................. 18
2 2
Contents
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001