User guide

260 Advanced User Guide
8 Inlets
Split ratio The ratio of split flow to column flow. Column flow
is set using [Col 1] or [Col 2]. This parameter is not available if
your column is not defined.
Split flow Flow, in mL/min, from the split vent. This parameter
is not available if your column is not defined.
Total f l ow The total flow into the interface, both setpoint and
actual
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 the column is defined
1 Press [Front Inlet] or [Back Inlet].
2 Scroll to Mode: and press [Mode/Type]. Select Split.
3 Set the interface temperature.
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 set for
you.
6 If desired, turn Gas saver on. Set Saver time after the sample
has been introduced.
7 If Gas saver is on, be certain Auto prep run is On (see “Pre Run
and Prep Run” on page 171) or press [Prep Run] before
introducing the sample.
If the column is not defined
1 Press [Front Inlet] or [Back Inlet].
2 Scroll to Mode: and press [Mode/Type]. Select Split.
3 Set the interface temperature.
4 Set Total flow into the interface. Measure flow out of the split
vent using a flow meter.
5 Subtract the split vent flow from Total flow. Subtract the
septum purge flow from the result to get column flow.