Thermo Scientific Dionex ICS-5000, Operator'S Manual, Page: 43 / 482

2 • Description
Doc. 065342-06 12/11
27
necessary, connect the seal wash system to pump 2 (the top pump), instead.
For instructions on how to replumb the system, refer to
Section 4.7 .
NOTE
For users who need to operate a piston seal wash system for
both pumps in the DP, Thermo Fisher Scientific offers an
External Seal Wash Kit (P/N 063518) or a second seal wash
system (P/N 068661).
2.2.6 Static Mixer (Analytical IC only)
For an analytical pump, a GM-3 or GM-4 static mixer is installed after the
secondary pump head (see
Figure 2-3 ). In the gradient pump, the mixer helps
to ensure that proportioned eluents are mixed thoroughly. In the isocratic
pump, the mixer is optional, but can function as a pulse damper.
The DP/SP gradient delay volume is 600

L
when a GM-3 is installed and
380

L
when a GM-4 is installed. The gradient delay volume (or dwell
volume ) is the volume of liquid in the system between the point where the
gradient is formed and the point where it enters the column. This includes the
mixer, transfer tubing, and swept volume in the injector or autosampler.
2.2.7 Pulse Damper (Capillary IC only)
For a capillary pump, flow output from the pressure transducer continues to
the pulse damper, which smooths minor pressure variations. From there, flow
is directed to the injection valve and then to the remainder of the
chromatography system.
Capillary
IC