Vapor Generation Accessory VGA–77 Operation manual

VGA–77An alternative method of removing traces of iodine from the tubingand gas liquid separator is to pump a freshly prepared 1% sodiumthiosulfate solution through the system for 5-10 minutes. You mustthen remove the thiosulfate by pumping distilled water through thesystem for 5-10 minutes.5.2 Replacement procedures5.2.1 Pump tubes5.2.2 Reaction coilTo remove the pump tubes, use the reverse procedure of that given insection 2.2.8.1. Remove the gas/liquid separator as described above.2. Remove the thumbscrew holding the reagent manifold cover inplace. Remove the cover by pulling the top of the cover awayfrom the manifold block and pushing the cover down.3. Remove the black fluoro-elastomer sleeve from the end of thereaction coil. Pull the end of the reaction coil through the hole inthe manifold block, then pull the reaction coil out of the channel.4. Slide the ‘T’ connection and the pump tubing connector out oftheir slots. You will find it easier if you remove all of the ‘T’ piecesand pump connectors.5. Hold the upper ‘T’ piece and sleeve firmly with one hand and pullthe reaction coil out of the sleeve.6. Fit the new reaction coil into the sleeve, then replace all of thepump tube connections and ‘T’ connections into their slots.7. Wind the reaction coil around the channels and out through thehole in the manifold block. Ensure that there are no kinks in thetubing.8. Fit the black fluoro-elastomer sleeve onto the end of the reactioncoil.9. Replace the manifold cover.10. Replace the separator.Publication date: May 2004 5-5