The S/Sl Inlet Pulsed Split And Splitless Modes - Agilent Technologies 7820A Advanced User's Manual

3
Inlets
Split
Valve
FS = Flow Sensor
PS = Pressure Sensor

The S/SL inlet pulsed split and splitless modes

NO T E
30
Carrier Supply
80 PSI
Frit
Valve
FS
Split Vent Trap
Pulsed split and pulsed splitless modes are not supported on EPR
(electronic pneumatics regulation) equipped GCs.
The pressure pulse modes increase inlet pressure just before the
beginning of a run and return it to the normal value after a
specified amount of time. The pressure pulse:
• reduces the solvent vapor volume
• reduces the risk of inlet overload
• tightens the sample band
• may allow use of a 2 mm liner, reducing the active glass area
If your chromatography is degraded by the pressure pulse, a
retention gap may help restore peak shape.
EPC/EPR Module
PS
Inlet Weldment
Column
Septum Purge
Frit
Advanced User Guide