ICS-3000 Ion Chromatography System
262 Doc. 065031-04 1/08
NOTE After starting the pump, wait at least 5 minutes
(longer for flow rates below 1.0 mL/min) before
beginning an analysis. This allows the DP/SP
Moduleware to stabilize the flow rate.
9.4 Replacing the Check Valves
A dirty check valve causes erratic flow rates and pressures; in addition, it may
cause the pump to lose prime and/or be difficult to reprime. If a check valve leaks
or is dirty, it should be replaced.
1. Click Motor on the pump Control panel in Chromeleon or Chromeleon
Xpress to turn off the pump flow.
2. Begin monitoring the Current Pressure reading on the Control panel. When
the system pressure reaches zero, do the following:
• Disconnect the pump from the software by clearing the Connected check
box on the Control panel.
• Press the POWER button on the front of the DP/SP for 2 seconds to turn
off the pump.
3. Open the DP/SP door to access the mechanical components.
4. Use the handles on the component mounting panel to pull the panel forward
until it reaches the stop.
NOTE On newer pumps, three red Phillips screws are installed
on the component mounting panel before shipment from
the factory. If the mounting panel does not move freely,
make sure these screws have been removed.
5. To prevent contamination of pump parts, wear cleanroom gloves while
disassembling the pump head.
Never disassemble the pump head with bare hands. Even minute
particles of dust, dirt, etc., on the check valves or piston can
contaminate the inside of the pump head and result in poor pump
performance.
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