Open the balance. Under normal circumstances, the balance is directly opened and is zero. If not, you can tare it to zero.

Electronic balance calibration (take BSM-220.3 as an example). After the balance returns to zero, press the CAL key of the balance, and the balance will display PLEASE waiting for flashing, and then +200.000 g will be displayed. At this time, open the glass door of the balance and put on the 200g weight. Close the glass door.

Press the CAL key, then the balance will blink, and then tick by tick, and the display screen of the balance will show +200.000g, indicating that the balance has been calibrated.

The balance can be used normally.

If you have any other questions, you can also ask me!