ICS-1000 Ion Chromatography System Operator's Manual

3 • Operation and Maintenance• Dionex strongly recommends vacuum degassing all eluents. Thishelps prevent bubbles, caused by outgassing, from forming in thepump heads and the detector flow cell.• The optional vacuum degas assembly provides programmable, onlinedegassing. The degas assembly must be installed in the ICS-1000 atthe factory. If the ICS-1000 does not contain a degas assembly,manually degas eluents daily (following the instructions below) andstore it in pressurized reservoirs.Manual Degassing of Eluent1. Prepare the eluent required for the application and pour it into avacuum flask1. Pour the deionized water into a vacuum flask2. Attach the flask to a vacuum pump or water aspirator.3. Vacuum degas the eluent deionized water for 5 to 10 minutes byshaking or sonication.4. Remove the flask from the vacuum. Do not allow water to flowfrom the aspirator back into the flask.5. Pour the degassed eluent deionized water into a pressurizablereservoir. Do not shake the eluent.6. Install an end-line filter on the eluent deionized water line (seeSection 3.4.3).7. Pressurize the reservoir (see Section B.20).3.4.3 Filter the EluentFiltering removes small particulates in the eluent that may contaminatethe pump check valves and cause erratic flow rates or loss of prime. Anend-line filter (P/N 045987) is provided in the ICS-1000 Ship Kit(P/N 057905) for this purpose.Install the end-line filter on the end of the eluent line, inside the reservoir.Verify that the end of the filter extends to the bottom of the reservoir andthat the filter is submerged in eluent. This prevents air from being drawnthrough the lines. Refer to the Pressurizable Reservoir InstallationInstructions for details.Doc. 031879-01 3/03 3-7