1.1. Handle with care and caution during use, and follow the instructions precisely. Do not disassemble the instrument's connecting parts arbitrarily, avoid dropping, colliding, or exposing it to vibrations. 2. After use, do not immerse it directly in water for cleaning. Wipe it with a clean, soft cloth. The optical surface must not be damaged or scratched. 2. Key Technical Parameters: Measuring range and minimum scale: Sugar content: 0–40%, minimum scale: 0.2% Alcohol content: 0–25% Equipped with a temperature compensation function to offset data deviations caused by temperature changes, ensuring more accurate results. The eyepiece has been improved, and the lens is made of heavy optical crown glass, not ordinary glass. 3.3. The instrument should be stored in a dry place of corrosive gases. Calibration: Before measurement, the device must be zerocalibrated. Place a few drops of distilled water on the detection prism and adjust the zerosetting screw to align the dividing line to the 0% scale position. Then, clean the detection prism and proceed with testing. 4. Product Application: The refractometer features a simple structure, shock resistance, ease of use, portability, a clear field of view, and affordability. The sugar series is widely used in canned food production, juice processing, wine fermentation, beverages, fruits, honey harvesting, and other fields. The following precautions should be observed during use and maintenance: