User guide

Inlets 8
Advanced User Guide 193
Split ratio The ratio of split flow to column flow. Column flow
is set in the column parameter list. This line does not appear if a
column in the flow path is not defined.
Split flow Flow, in mL/min, from the split/purge vent. This line
does not appear if a column in the flow path is not defined.
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 171 for
details.).