3D Microscopy Maintenance and careB 40-022-4 e 07/98 112.3 Maintenance and care2.3.1 GeneralNever expose the components for 3Dmicroscopy to inadmissible climatic conditions(high humidity and temperature) for longerperiods of time.The components must be protected from dustand humidity and covered with the dust coverafter every use.2.3.2 Cleaning of opticalcomponentsThe 3D shutter in the eyepieces and in the 3Dillumination shutter are equipped with apolarizing foil.The polarizing foils must not be cleaned withsolvents.The foils are sensitive to scratching.1 Fuse compartment2 Voltage selector3 Holding unit4 WindowChanging the voltage selector on the rear of the3D-CONTROL DSA-3 unitClean the polarizing foils as follows: Remove dust using a rubber blower Use a soft optics cleaning cloth Use a natural hair brush degreased in alcoholand dried before.The glass plate of the window of the CCDcamera can be cleaned using the cleaning budssupplied.2.3.3 Change of voltage and fusesPrior to connection to the line, check whetherthe voltage set on the selector at the rear of the3D-CONTROL DAS-3 unit complies with the linevoltage; it may be necessary to change from230 V to 115 V. Pull the power plug before changing thevoltage or the fuses Use a small screwdriver to turn back theclamping piece of the fuse holder at the rearof the 3D-CONTROL DAS-3 unit;lift the fuse holder out of the fusedepartment Remove the fuses Pull voltage selector out of its holder Turn voltage selector around 180° and insertit back in its holder:the new voltage is visible in the window Insert the fuses listed under "Technical Data" Insert fuse holder back in the fusedepartment until click-stop.