Agilent Technologies 1200 Series Manual page 13

the same time moving the second plunger downwards. Then the sequence
starts again moving the plungers up and down between the two limits. During
the up movement of the first plunger the solvent in the chamber is pressed
through the outlet ball valve into the second chamber. The second plunger
draws in half of the volume displaced by the first plunger and the remaining
half volume is directly delivered into the system. During the drawing stroke of
the first plunger, the second plunger delivers the drawn volume into the
system.
For solvent compositions from the solvent bottles A, B, C, D the controller
divides the length of the intake stroke in certain fractions in which the
gradient valve connects the specified solvent channel to the pump input.
Table 1
Delay volume
Materials in contact with mobile phase
DCGV
Pump head
inlet valve
Outlet valve
Adapter
Purge valve
Damping unit
For quaternary pump specifications, see
Specifications"
1200 Series Quarternary Pump User Manual
Pump Details
on page 21.
Overview of the Hydraulic Path
800–1100 µl, dependent on back pressure
PTFE
SST, gold, sapphire, ceramic
SST, gold, sapphire, ruby, ceramic, PTFE
SST, gold, sapphire, ruby
SST, gold
SST, gold, PTFE, ceramic, PEEK
Gold, SST
"Site Requirements and
1
Introduction
13