Operator`s manual

Dionex ICS-1100 Ion Chromatography System
30 Doc. 065289-03 10/12
Pressure Transducer
Flow exiting the secondary pump head is directed to the pressure
transducer (see Figure 2-12
), which measures the system pressure.
Pressure readings indicate that the pumping system is delivering smooth,
accurate flow. Pressure readings can be monitored from the Chromeleon
Control panel.
The system pressure should remain consistent (no more than a 3%
difference from one pressure reading to the next). High and low pressure
limits can be used to stop the pump flow if a limit is exceeded. The
pressure limits can be set from Chromeleon (in the Server Configuration
or in the control program). See Section 4.2
for troubleshooting
information if a pressure limit is exceeded.
Pulse Damper
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.
Piston Seal Wash
The pump includes a piston seal wash assembly that can be set up to
continuously rinse the back of the piston seals to remove salt crystals and
prolong the life of the seals. To use this feature, an external water source
must be connected. For connection instructions, refer to the Dionex ICS-
1100 installation instructions.
For continued protection of the pump, replace the piston rinse seals (see
Section 5.7
) and O-rings in the seal wash assembly every 6 months, or
whenever you replace the main piston seals for the Dionex ICS-1100
pump.
2.4.4 Injection Valve
The injection valve (P/N 057968) is a six-port, electrically-activated
valve. A 25-L sample loop (P/N 042857) is installed on the valve at the
factory.
The valve has two operating positions: Load and Inject (see Figure 2-13
).