This parameter determines the split flow after a sample transfer. It can be set lower than the Split
Flow to reduce the carrier gas use.
7.4.6 Auxiliary Outputs
Any of the auxiliary outputs can be used in any of the OPTIC-4 method types. Each output can switch
at nine user-specified times during a method run.
To keep the Evolution Workstation screens uncluttered, the auxiliary outputs are only shown in the
method parameter tables if they have first been selected in Configuration - System configuration -
Auxiliary Outputs.
7.4.7 Expert Method Parameters
Expert methods allow the user to set the profiles for any method parameter with up to nine
individually configured segments. This makes it possible to develop advanced temperature and gas
flow profiles.
Note:
The profiles in the Expert method could contain up to nine time segments.
To add a time segment, click the right mouse button pointing on the profile line where
the segment should start. Select “Add Step”, the segment will be added the graph and the
parameters in the parameter list will be updated. To remove a segment, press the right
mouse button and select “Remove Step”.
The relevant method parameters are divided in groups as for the other above described methods.
The groups which contain parameters specific for the Expert method are:
Inlet Temperature group:
• Initial Inlet Temperature
• Delay Time (used to ensure equilibration of the gas flow parameters due to a rapid inlet
pressure change after the injection)
• Ramp Rate 1 - 9
• Hold Temperature 1 - 9
• Hold Time 1 - 9
Note that both positive and negative temperature ramps can be set (see also Section 9.4 “Negative
temperature ramps in Expert Methods”).
Column Flow group:
• Carrier Control Mode: Flow or Pressure
• Start Column Flow 1 - 9
• Column Flow Time 1 - 9
• End Column Flow 1 - 9
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