Agilent Technologies 7820A

Inlets 3
Advanced User Guide 29
Split/Splitless inlet splitless mode overview
In this mode, the split vent valve is closed during the injection
and remains so while the sample is vaporized in the liner and
transferred to the column. At a specified time after injection,
the valve opens to sweep any vapors remaining in the liner out
the split vent. This avoids solvent tailing due to the large inlet
volume and small column flow rate. Specify the purge time and
purge flow rate in the inlet parameter list.
If you are using gas saver, the gas saver time should be after the
purge time.
Valve
Frit Frit
EPC/EPR Module
Valve
Split Vent Trap
Inlet Weldment
FS = Flow Sensor
PS = Pressure Sensor
FS
PS
Split
Carrier Supply
80 PSI
Septum Purge
Column
NOTE
Gas saver and pressure pulse mode are not supported on EPR (electronic
pneumatics regulation) equipped GCs.