Vi Direct Mode Setpoint Dependencies; Vi Direct Mode Initial Values - Agilent Technologies 7890 Series Advanced Operation Manual

3
Inlets

VI direct mode setpoint dependencies

VI direct mode initial values

142
Restore the GC to normal operating conditions. Perform a
8
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.
Press [Config][Back Inlet] or [Config][Front Inlet].
1
Scroll to Mode and press [Mode/Type].
2
Select Split vent removed. Press [Enter].
3
Press [Back Inlet] or [Front Inlet]. If the inlet is correctly
4
configured, you will see the Direct injection display.
Some setpoints in the flow system are interdependent. If you
change one setpoint, other setpoints may change to
compensate.
Table 36 Setpoint changes
When you change
Before and after
sampling
Pressure
Column flow*
During sampling
* This setpoint appears in the column parameters
.**This value is actual only
Use the information in
operating conditions for your interface.
These setpoints change
Column defined
*
Column flow
Total flow**
Pressure
Total flow**
You cannot change pressure and flow setpoints
during sampling time.
Table 37 to help you set up the
Advanced Operation Manual
Column not defined
The Column flow*
setpoint is not available.
You can change the
pressure setpoint; other
setpoints are not
affected.