1:Reset the scales by pressing [ON/OFF] key
2: Wait until the LCD display "0.0" and then press and HOLD [UNITS] or [MODE] key for 3 seconds,the LCD will display "CAL",and then release the [UNITS] or [MODE] key
3:Press [UNITS] or [MODE] key again,the LCD will display "CAL" followed by the required calibration weight
4:Add the required calibration weight,the display will show "PASS" and return to normal weighing mode.(some item need Press [Units] or [MODE] key before step 4)
