Inlets 3
Advanced Operation Manual 101
Total f l ow These are the actual and setpoint values of the
total flow into the inlet, which is the sum of the split flow,
column flow, and septum purge flow. When you change the total
flow, the split ratio and split flow change while the column flow
and pressure remain the same.
Septum Purge Flow through the septum purge vent.
Gas saver On to reduce split vent flow at Saver time.
Saver flow Reduced split vent flow, at least 15 mL/min.
Saver time Time when flow is reduced to save gas.
If all columns in the flow path are defined
1 Press [Front Inlet].
2 Scroll to Mode: and press [Mode/Type]. Select Split or
Pulsed split.
3 Set the inlet temperature (Initial temperature) and any
desired ramps.
4 If you want a specific split ratio, scroll to Split ratio and
enter that number. The split flow will be calculated and
set for you.
5 If you want a specific split flow, scroll to Split flow and
enter that number. The split ratio will be calculated and
displayed for you.
6 If you selected Pulsed split, enter values for Pulsed pressure
(pressure at injection) and Pulse time (minutes after
injection to return to normal pressure).
7 If desired, turn on Gas saver. Set the Saver time after the
injection time.
8 Press [Prep Run] before manually injecting the sample if
the Gas Saver is on (see “Pre Run and Prep Run”
on
page 40).
If a column in the flow path is not defined
1 Press [Front Inlet].
2 Set the inlet temperature (Initial temperature) and any
desired ramps.
3 Set other parameters as described for a defined column.
4 Set Total flow into the inlet. Measure flows out of the split
vent and septum purge vent using a flow meter.
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