We have tried to explain the steps below to carry out the calibration procedure along with a video.

Step 1.  Switch the scale ON and immediately press the Unit button for 4 times

Step 2.  When scale display's 5000 press Tare button, it shows CAL0 and 5000

Step 3.  Place the 5kg weight on the scale until the display calculates weight and 'PR 55' appears on screen. This means scale is calibrated and passed.

Step 4.  Remove the 5kg weight from the scale and switch OFF.