1. Clean and dry the breathalyzer completely before use (wipe it with soap or alcohol)
2. After clean treatment, the alcohol meter can not be held in the marking line part of the indexing, need to gently hold the index finger and thumb on the dry tube scale paper - and pay attention to not hold horizontally, should be held vertically, in case of breaking;
3. Clean the measuring cylinder used for wine so as not to affect the reading;
4.Pour about 100 ml of liquor or steamed wine into the measuring cylinder, when you do not know the liquor measured about degree, should choose a high range of alcohol meter measurement, if the alcohol meter reading all surface of the liquid, use a low range of alcohol meter measurement, put thermometer and alcohol meter into the measuring cylinder do not stick to the wall, wait a moment;
5. When measuring the temperature, put the thermometer in the white wine first and read it after the reading is stable. Do not take out the thermometer and then read it.