Agilent Technologies 1260 Infinity II User Manual page 66

3
Using the Module
Setting up the Pump with the Instrument Control Interface
Advanced Settings
The Quaternary Pump advanced method setup parameters are in five sections:
• Minimum Stroke
• Compressibility
• Maximum Flow Gradient
• Primary Channel
• Mixer Selection
Table 8 Advanced method parameters
Parameter Limits
Minimum Stroke 20 – 100 µL
Compressibility
Maximum Flow 1.000 –
Gradient 1000.000 mL/min/min
in steps of
0.001 mL/min/min
Default value:
100.000 mL/min/min
66
Description
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.
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.
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.
1260 Infinity II Flexible Pump User Manual