The zero and full-scale errors of electronic scales can be adjusted artificially, which will happen if they are not adjusted properly. According to the principle of electronic scales, there is a simple method to check whether 1 is displayed as zero when things are not weighed. 2. Find a standard object to measure the error. For example, after weighing about 200 kilograms of corn, weigh it with your own standard weight, and you will know that the scale is accurate. If the weight of corn is large, such as 1000 kg, you have to increase the standard and add more people. The closer the weight of the weighed object is to the standard object, the more accurate it is. There is no other way. You can't give others a weight. I wish I could help you.