142 Advanced Operation Manual
3 Inlets
8
Restore the GC to normal operating conditions. Perform a
leak test on the interface fittings.
Configuring the GC for a direct injection
The GC cannot sense the presence of the split vent. When
you disconnect or reconnect the vent, you must configure
the GC so that the pneumatics work properly.
1 Press [Config][Back Inlet] or [Config][Front Inlet].
2 Scroll to Mode and press [Mode/Type].
3 Select Split vent removed. Press [Enter].
4 Press [Back Inlet] or [Front Inlet]. If the inlet is correctly
configured, you will see the Direct injection display.
VI direct mode setpoint dependencies
Some setpoints in the flow system are interdependent. If you
change one setpoint, other setpoints may change to
compensate.
VI direct mode initial values
Use the information in Table 37 to help you set up the
operating conditions for your interface.
Tabl e 36 Setpoint changes
When you change These setpoints change
Column defined Column not defined
Before and after
sampling
The Column flow*
setpoint is not available.
Pressure Column flow
*
Total flow **
* This setpoint appears in the column parameters
.**This value is actual only
You can change the
pressure setpoint; other
setpoints are not
affected.
Column flow* Pressure
Total flow **
During sampling You cannot change pressure and flow setpoints
during sampling time.
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