User`s guide

Operation
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Pressure or the Trap Desorb Flow Time is set to zero, the system will
default to the Isobaric Pressure Injection Mode.
To set the Trap Desorb pressure, press the Trap button on the PNU
tab. A Trap Desorb dialog box will be displayed. Set the Trap
Desorb pressure to a lower value than the Column Pressure
displayed on the PNU tab.
To set the Trap Desorb Flow Time, press the Trap button on the
Timing tab. A Trap Timing dialog box will be displayed. Set the
Desorb Flow Time to a value other than zero but less than or equal
to the Temperature Hold Time displayed in the dialog box.
Flow Pulse Injection Mode - The sample can be desorbed from the
trap at a lower flow than the column flow used during the analysis
state. The flow is then raised back to the column flow. This can
improve peak shape for some applications by increasing the speed at
which the sample is swept off of the trap and then compressed in the
column when the flow is increased.
To enable the Flow Pulse Injection Mode, a value for the Trap
Desorb Flow and a time for the Trap Desorb Flow must be set. If the
Trap Desorb Flow is set to the same value as the Column Flow or the
Trap Desorb Flow Time is set to zero, the system will default to the
Constant Flow Injection Mode.
To set the Trap Desorb flow, press the Trap button on the PNU tab.
A Trap Desorb dialog box will be displayed. Set the Trap Desorb
flow to a lower value than the Column Flow displayed on the PNU
tab.
To set the Trap Desorb Flow Time, press the Trap button on the
Timing tab. A Trap Timing dialog box will be displayed. Set the
Desorb Flow Time to a value other than zero but less than or equal
to the Temperature Hold Time displayed in the dialog box.
The Log Tab
The Log tab provides instrument history information. The start time
of the current analysis or sequence is displayed along with
information on completed runs and the estimated completion time,
the tube number, the method with which it was analyzed plus the