Inlets 3
Advanced Operation Manual 63
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 for details.).
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.
5 Subtract the septum purge flow and split vent flow from
Total flow to get column flow.
6 Calculate the split ratio (split vent flow/column flow).
Adjust as needed
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