122 Agilent 1200 Preparative Pump User Manual
7 Maintenance
Simple Repairs
Exchanging the Filter Frit
Changing the Filter Frit
1 Using a 1/4 inch wrench disconnect the capillary between multi assembly
and EMPV.
Whenever replacing the filters on the multi assembly is required because of a pump seal
change or because excessive back pressure indicates the need for a replacement, make
sure to replace the filter cup first (see “Exchanging the Filter Cup” on page 120) and then
the filter frit, after having pumped another 200 ml of solvent.
When When the back pressure exceeds 10 bar pumping 50 ml/min of pure water with open purge valve.
After 200 ml solvent have been pumped through the pump after a filter cup exchange.
Tools required • Wrench 7/16 inch
• Wrench 1/4 inch
• Hex-key 4 mm
• Wash bottle containing Isopropanol
Parts required # Part number Description
1 5022-2192 Filter frit 2 µm
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