3Using the Module
Setting up the Pump with the Instrument Control Interface
1260 Infinity II Flexible Pump User Manual 80
Table 10 Advanced method parameters
Parameter Limits Description
Minimum Stroke 20 – 100 µL The Stroke Volume is used for optimizing between performance of the
module and seal life time. For performance a low stroke volume is
beneficial, as it divides disturbances into smaller packages, but a larger
volume is extending the life time of the pump seals.
If Automatic is activated, the pump tries to achieve an optimized stroke
volume for the Inline Weaver geometry.
Compressibility The compressibility of the mobile phase has an effect on the performance
of the pump. For best flow accuracy and mixing performance, you can set
the parameter according to the mobile phase being used.
Use solvent types:
• Select this check box (recommended) for using the enhanced and
automatic compressibility calibration. Then select the calibrated solvent
from the drop-down lists using the combo boxes in the Solvents section.
Using this checkbox hides compressibility fields for manual settings.
• Clear this check box to display the compressibility fields, which allow
you to enter manual compressibility values, which are constant over
pressure. This setting is available for method backward compatibility
e.g. from 1260 Infinity pumps. For best performance, use solvent types.
Maximum Flow
Gradient
1.000 – 1000.000 mL/
min/min in steps of
0.001 mL/min/min
Default value:
100.000 mL/min/min
You can set a limit on the rate of change of the solvent flow to protect your
analytical column. You can set individual values for Flow ramp up and Flow
ramp down.
Primary Channel Using Automatic is recommended.
The primary channel can be specified as A to D for optimizing highly specific
methods. It is split up to deliver the first and last solvent package created by
the MCGV in order to optimize composition precision. The primary channel
does not change during a gradient, as long as the channel is used. Using
Automatic chooses the channel with the highest percentage at start
conditions before a gradient.
Mixer Selection Click the down-arrow and select the mixer to use from the list:
•Use any mixer: The currently installed mixer is used, irrespective of its
type.
• Do not use mixer: The valve is set to bypass the mixer so that it is not in
the flow path.
•<Mixer Name>: Only the specified mixer may be used; it the mixer is not
found, the pump goes into a Not Ready state.
To Next Page
Loading...
Need help?
General
