User guide

178 Advanced User Guide

8 Inlets

The S/SL inlet pulsed split and splitless modes

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.

You must press [Prep Run] before doing manual injections in the

pressure pulse modes. See “Pre Run and Prep Run” on page 171

for details.

Valve

Frit Frit

Valve

EPC Module

Valve

Split Vent Trap

Inlet Weldment

FS = Flow Sensor

PS = Pressure Sensor

Split

Carrier Supply

80 PSI

Septum Purge

Column