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Dionex ICS-5000 Operator’s Manual
24
Doc. 065342-06 12/11
NOTE
For easier access to pump components when performing ser-
vice procedures, the pump panel can be pulled forward to the
front of the pump compartment. First, make sure that the five
red Phillips screws are removed from the component panel.
Then, use the handles to pull the panel forward. The upper
and lower component panels slide forward together.
2.2.1
Pump Heads
The DP/SP is a low-pulsation, serial dual-piston pump with electronic
compressibility compensation. Two pump heads—a
primary
head and a
secondary
head—are connected in series. Eluent passes through both pump
heads in succession.
The primary pump head delivers eluent at the selected flow rate, while
simultaneously filling the secondary pump head. The latter serves as a
reservoir and delivers eluent while the primary head carries out the refill
stroke.
The characteristic feature of the patented isokinetic pre-compression phase is
the programmed overlapping of the delivery strokes of the two pump heads.
When delivering compressible liquids without controlled pre-compression,
Figure 2-4. Analytical Gradient Pump Components
Proportioning
Valve Fittings
Vacuum Degas
Chambers (four
channels)
1
4
2
1
2
3
Static Mixer
4
Proportioning
Valve Outlet to
Primary Pump
Head
Pump Outlet to
EG or Injection
Valve
5
3
5
Summary of Contents for Dionex ICS-5000
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