Buchi DuMaster D-480, Operation Manual, Page: 219 / 354

Operating instructions DuMaster D-480 ©BÜCHI Labortechnik AG
8 - Maintaining the instrument 219
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Lift off the ring at the pilots.
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Clean the plastic top section and ring with

a soft cloth or bottle brush and

some water with a mild laboratory cleaner.
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Allow the carousel to dry. If necessary, remove the last traces of moisture with warm air.
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Replace the ring on the plastic top section and use a wrench to turn the hexagon head screws so
the tips of the screws prevent you from lifting off the ring (tighten the screws only slightly). The
metal ring will be held with the plastic top section by means of a magnet.
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Move the plastic section until the reference hole (bore in the plastic section without number
indicated by a white ring) matches the bore in the metal ring.
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Insert the carousel into the holder and observe that the ejector openings of the ring must be
above the ball valve.
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Subsequently, perform a reference run.