Product Manual for Dionex IonPac AS23 Columns - Cromlab
Product Manual for Dionex IonPac AS23 Columns - Cromlab
Product Manual for Dionex IonPac AS23 Columns - Cromlab
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<strong>Product</strong> <strong>Manual</strong> <strong>for</strong> <strong>IonPac</strong> <strong>AS23</strong> amd <strong>IonPac</strong> AG23 <strong>Columns</strong> Page 22 of 326.1.2 Replacing Column Bed Support AssembliesIf the column inlet bed support is determined to be the cause of the high back pressure, it should be replaced. To change the inletbed support assembly, refer to the following instructions, using one of the two spare inlet bed support assemblies included in theShip Kit.A. Disconnect the column from the system.B. Carefully unscrew the inlet (top) column fitting. Use two open-end wrenches.C. Remove the bed support. Turn the end fitting over and tap it against a benchtop or other hard, flat surface to removethe bed support and seal assembly. If the bed support must be pried out of the end fitting, use a sharp pointed objectsuch as a pair of tweezers, but be careful that you DO NOT SCRATCH THE WALLS OF THE END FITTING.Discard the old bed support assembly.D. Place a new bed support assembly into the end fitting. Make sure that the end of the column tube is clean and freeof any particulate matter so that it will properly seal against the bed support assembly. Use the end of the column tocarefully start the bed support assembly into the end fitting.<strong>IonPac</strong> <strong>AS23</strong>4-mm <strong>Columns</strong>(P/N)<strong>IonPac</strong> <strong>AS23</strong>2-mm <strong>Columns</strong>(P/N)Analytical Column 064149 064145Guard Column 064147 064143Bed Support Assembly 042955 044689End Fitting 052809 043278CAUTIONIf the column tube end is not clean when inserted into the end fitting, particulate matter may obstruct a properseal between the end of the column tube and the bed support assembly. If this is the case, additional tightening maynot seal the column but instead damage the column tube or the end fitting.E. Screw the end fitting back onto the column. Tighten it fingertight, then an additional 1/4 turn (25 in x lb). Tightenfurther only if leaks are observed.F. Reconnect the column to the system and resume operation.NOTEReplace the outlet bed support ONLY if high pressure persists after replacement of the inlet fitting.Document No. 065120-05 ©2012 Thermo Fisher Scientific July 2012