User guide

182 Advanced User Guide
8 Inlets
Vapor Volume Calculator
Agilent provides a Vapor Volume Calculator to help you
determine if a liner is suitable for a method. To use the
calculator install the Agilent Instrument utility provided with
the GC. The calculator is also provided with the Agilent
G4600AA Lab Advisor software.
Setting parameters for the S/SL split mode
Mode The current operating mode—split
Tem pe ratur e Actual and setpoint inlet temperatures
Pressure Actual and setpoint inlet pressure
Split ratio The ratio of split vent flow to column flow. Column
flow is set at the Column parameter list. This line appears only
if your columns in the flow path are defined.
Split flow Flow, in mL/min, from the split vent. This line
appears only if your columns in the flow path are defined.
Total f l ow This is the total flow into the inlet, which is the sum
of the split vent flow, column flow, and septum purge flow. When you
change the total flow, the split ratio and split vent flow change while
the column flow and pressure remain the same.
Septum Purge Flow, in mL/min, through the septum purge line.
Recommended range is 1 to 5 mL/min.
If all columns in the flow path are defined
1 Press [Front Inlet] or [Back Inlet].
2 Scroll to Mode: and press [Mode/Type]. Select Split.
3 Set the inlet temperature.
4 If you want a specific split ratio, scroll to Split ratio and enter
that number. Split flow will be calculated for you.
5 If you want a specific split flow, scroll to Split flow and enter
that number. Split ratio will be calculated for you.
6 If desired, turn on Gas saver. Set Saver time after the injection
time. Press [Prep Run] (see “Pre Run and Prep Run” on
page 171) before manually injecting the sample.