Retriever IV Fraction Collector User Manual - Isco

Retriever IV Fraction CollectorSection 3 Operating Procedures3.9 Internal Overflow The Retriever IV contains a polypropylene overflow tray beneaththe racks and shuttles. This overflow tray is designed to divertspills to waste. An outlet is provided for attaching tubing. Theoutlet from the tray is designed to accept 7/16” OD tubing asshown in Figure 3-5. The volume of the internal overflow tray is1.5 liters.Bezel RetainingScrewsFront Edgeof TrayOverflowRetaining Nut7/16” OD TubingTransformerCoverFigure 3-5 Overflow TrayWARNINGDo not plug the overflow drain. If the drain is blocked, theoverflow could fill the tray. If the solvent is flammable,sparks from contacts inside the unit could ignite theaccumulation of overflow.3.10 Case Top The Retriever IV’s case top is designed to be easily removed forcleaning or convenient storage of samples. Simply release thefour case top latches and remove the sensor/drop formerassembly (refer to section 5.2).CAUTIONRisk of electric shock. Disconnect electric power before servicing.Only trained service personnel may remove the transformercover or the overflow tray.3.11 Valves Two solenoid-operated valves, which stop flow during tubechanges and at the end of the run are available as an option fromTeledyne Isco. These valves are made of Kel-F ® and Teflon ® , andare essentially inert. Similar valves (with different plugs and differentoperating voltages) are used on other Teledyne lscofraction collectors, so it is important to be sure you have thecorrect valve.These valves stop or divert effluent flow approximately 0.8seconds before each tube change. They will always stop or diverteffluent flow at the end of a run, and during power failure. Theyare especially recommended when working with radioactive or3-8