
68
1200 Series Handheld Control Module Users’s Guide
3
Using the Pump
Adjusting Stroke Volume
Adjusting Stroke Volume
The stroke volume defines the volume of mobile phase which is displaced by
one stroke of pump piston 1. You can set the stroke volume to AUTO
(automatic) or a value between 20 and 100 µl. When the stroke is set to AUTO,
the pump uses large strokes at high flow and shorter strokes at low flow rate.
This can improve the mixing performance and gradient linearity by reducing
the size of the solvent packets to be mixed.
The stroke volume can be accessed by using the
Settings
button [
F1
] in the
Analysis
screen, selecting the pump and then pressing More ...
The amplitude of the pressure pulsation is directly proportional to the stroke
volume. Decreasing the stroke volume decreases the pulsation amplitude,
giving a better signal-to-noise ratio with flow-sensitive detectors. To maintain
the flow, the pumping frequency is increased, increasing the frequency of the
pressure pulsation. Increasing the pump frequency gives better peak area
reproducibility at low flow rates.
Automatic Shut-down
At the end of a sequence you can set the pump to be automatically turned off
using the Sequence End
Actions
button [
F1
] in the
Sequence
screen. You can
turn off the pump completely or load a specific shut-down method.
Troubleshooting the Pump
1
Select the
Tests
button [
F3
] in the
System
screen.
2
Select Pump from the menu.
You can now select various tests to check the pump. For further information
about these tests see the
Reference Manual
for the Agilent 1200 Series pump.
Содержание G1323A
Страница 1: ...A Agilent 1200 Series Handheld Control Module User s Guide ...
Страница 14: ...14 1200 Series Handheld Control Module Users s Guide Contents ...
Страница 74: ...74 1200 Series Handheld Control Module Users s Guide 4 Using the Degasser Changing Solvents ...
Страница 100: ...100 1200 Series Handheld Control Module Users s Guide 7 Using the Detectors Configuring the Analog Channel Output ...
Страница 112: ...112 1200 Series Handheld Control Module Users s Guide 8 Using the Column Compartment Resetting the Column Compartment ...
Страница 122: ...122 1200 Series Handheld Control Module Users s Guide 9 Running an Isocratic Analysis Starting the Analysis ...
Страница 132: ...132 1200 Series Handheld Control Module Users s Guide 10 Running a Gradient Analysis Starting the Analysis ...
Страница 154: ...154 1200 Series Handheld Control Module Users s Guide 12 Running an Injector Program Saving the Method ...
Страница 162: ...162 1200 Series Handheld Control Module Users s Guide A Appendix Agilent Technologies on Internet ...
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