For example, the price of meat is 15 yuan Jin, and the seller will enter the unit price as 30 yuan/Jin, because all electronic scales are calculated in kilograms, then the weight of meat will be displayed in the column of electronic scales as 1.2 Jin (two kilograms and four ounces), and the total price will be 36 yuan (30X 1.2).
Electronic scale is a national compulsory verification measuring instrument, and its qualified products have the standards of verification score e and score d, which are protected by the national metrology law.
According to the "Metrology Law of People's Republic of China (PRC)" and "Catalogue of Working Measuring Instruments Compulsory Verification in People's Republic of China (PRC)", all electronic scales used as social public measurement standards, electronic scales used by departments, enterprises and institutions as the highest measurement standards, and electronic scales used for trade settlement, safety protection, medical and health care and environmental monitoring can only be used after passing the measurement verification.
Those who fail to apply for metrological verification or fail to pass the verification shall not be used.
Working principle:
When an object is placed on the scale, pressure is applied to the sensor, and the sensor deforms elastically, so that the impedance changes, and at the same time, the excitation voltage changes, and the changed analog signal is output.
First, the correct placement: first of all, we must use electronic scales, first of all, we must know how to place them. Under normal circumstances, it should be placed on a level and stable table, so that it can be used correctly. In addition, other items such as paper cannot be placed under the scale. If you tilt or shake, it will affect the reading of the electronic scale.
2. Correct use: If the mercury bubble on the panel deviates from the center during use, it means that the electronic scale is not in a horizontal state, and the levelness of the disk surface needs to be adjusted first. The four feet of the semi-electronic scale can be adjusted by rotation, and the mercury bubbles on the panel can be kept in the middle position by manually adjusting the feet.
3. Correct maintenance: Any electronic equipment has a service life, so it must be well maintained at ordinary times, and the electronic scale should be carefully put down in daily work, because violent vibration will lead to the loosening of the pawls and rubber legs of the sensor. So avoid all kinds of bumps, and don't throw each other during handling and moving.