Weighing balance calibration is an important activity to get reliable outcome & confidence in routine weighing results, most of the electronic weighing balance now a days comes with a feature of Internal and external calibration, for batter accuracy it is always recommended to calibrate the weighing balance with place a calibration weight on the pan and record the result.
Switch on the scale, allow it to warm up and then press the button or key for “auto-calibrate” or “calibrate”. Most internal calibrations will first display a “no weight” measurement, and then require a specified standard check weight to be placed on them. After placing the weights, verify the use range of the balance.