Hand Held 0-80% Alcohol Refractometer Alcoholometer Alcohol Liquor Tester ATC Measurement range: 0-80% Min scale: 1% ATC automatic temperature compensatory 1. Measurement of alcohol and alcohol degree of alcohol degree; Alcohol meter, mainly used to detect liquor alcohol and medical alcohol degrees. 2. measure the alcohol degree of rice wine; Follow the instruction manual, you can get accurate rice wine alcohol. 3.Measure the alcohol level of the fruit wine ; Measuring fruit wine in theory is erroneous because fruit wine contains sugar and other soluble substances that affect the refractive index of alcohol. The specific error will vary from the brewing of fruit wine to the brewing of fruit wine. 1. Align the Cover Plate with light, adjust the Focus Adjustment until you see the scale clearly. 2. Calibration: Accurate Measurement depends on careful calibration. Please make sure the ambient temperature is about 68 degF, distilled water can be used to calibrate. A. Open the Cover plate. place 2-3 drops of the distilled water on the prism, then close the cover plate and make sure the water spread aro the prism without any air bubbles or dry spots. wait for about 30 seconds to let the reading to stabilize. Look into eyepiece and turn the calibration screw with the screw driver until the reading is "0" 3. Clean the prism with soft cloth, then place 2-3 drops of the liquid sample to be tested on the prism. then close the cover plate and make sure the water spread aro the prism without any air bubbles or dry spots. wait for about 30 seconds to let the reading to stabilize. Align the prism aembly with the light source. look into eyepiece and you can get the reading. 4. Please leep the refractometer dry and clean in the box, which can make sure the reading accuracy and durable. 1 x Refractomete 1 x Screw driver 1 x Cleaning cloth