Cement mixing station measurement system in the measurement of cement, sand and other materials, is not necessarily very accurate, there will be errors, the specific error can be how much is qualified, the following to give you a detailed description. Small indicator of cement aggregate weighing equipment is 35 scale value, allowable error range: the scale error range is less than or equal to 200 scale, the error is plus or minus 1 scale value; Greater than 200 marks, plus or minus 2 marks. In the operation, the error is: less than or equal to 100 scale, the error is in plus or minus 1 scale; It is larger than the scale value of 200, and the error is plus or minus 3. Therefore, some errors are normal when weighing aggregate, as long as it is within the scale value range.