Agilent Technologies InfinityLab LC Series User Manual page 63

3 Using the Pump
Setting up the Pump with the Instrument Control Interface
Advanced Settings
The pump advanced method setup parameters are in four sections:
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•
•
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Table 13 Advanced method parameters
Parameter Limits
Minimum Stroke 20 – 100 µL
Compressibility
40·10
Default compressibility
value: 100·10
Maximum Flow 0.1 – 100 mL/min/min
Gradient Default value:
100 mL/min/min
Primary Channel
(Quaternary pump
only)
Agilent InfinityLab LC Series 1260 Infinity II Isocratic and Quaternary Pumps User Manual
Minimum Stroke
Compressibility
Maximum Flow Gradient
Primary Channel (Quaternary Pump only)
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 best performance and lowest ripple.
-6 -6
The compressibility of the mobile phase has an effect on the performance
– 150·10 .
of the pump. For best flow accuracy and mixing performance, you can set
the parameter according to the mobile phase being used.
-6
You can set a limit on the rate of change of the solvent flow to protect your
analytical column.
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.
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