DO NOT SUBMERGE INSTRUMENT IN LIQUIDS.
DO NOT hold instrument under running water.
DO NOT leave instrument in direct sunlight or in a vehicle on a sunny day.
DO NOT subject instrument to temperatures above 50°C (122°F) or less than –10°C (14°F).
DO NOT attempt to repair, modify, or disassemble any portion of the instrument.
DO NOT let liquid fall from instrument onto clothing or other surfaces after taking readings.
DO NOT drop or subject instrument to strong shocks or vibration.
DO NOT use a metal device to transfer samples to the measuring surface.
DO NOT use an instrument unless you have personal knowledge of its calibration.
DO NOT attempt to recharge the batteries that came with the instrument.
DO NOT press the buttons with anything other than a finger.
Note: When storing the instrument for long periods of time, it is advisable to remove the batteries. Use only AAA batteries. Pay close attention to battery polarity when inserting batteries. Reversing the polarity can cause instrument damage.
The entire refractometer may be cleaned with a soft, clean cloth or paper towel, dampened with a mild liquid dish soap and water. The use of solvents or petroleum-based cleaners is not recommended.
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