ORA_10_18_20_32_80BB-BA-e-1510 10merse the device in water or hold it under running water. Never handle the devicewith wet or damp hands.Never touch the measuring prism [2] with hard tools made from plastic, wood, rubber,metal, glass etc. Hard objects can quickly damage the relatively soft prism glass, re-sulting in measurement errors.The refractometer is maintenance-free.Cleaning should be carried out immediately before and after each use of the refrac-tometer to maximise its life and optimise measurement results.9 StorageStore the refractometer in a dry, non-corrosive environment, preferably between10°C and 30 °C.10 ServiceAfter reading this operating manual, if you have any questions about setting up orusing the refractometer, or if any unexpected problem occurs, please contact yourdealer. The device housing may only be opened by trained service techniciansauthorised by KERN.11 DisposalThe packaging consists of environmentally friendly materials which can be disposedof via local recycling facilities.The device and storage box should be disposed of by the operator in accordancewith applicable national or regional regulations at the place of use.12 Additional informationThe product may differ slightly from the illustrations.Avoid exposing the refractometer to direct sunlight.Never bring the refractometer into contact with solvents.