To calibrate the scale:

1. Under power off condition, Press “MODE” and “TARE” simultaneously unreleased until the display show “CAL”.

2. After the data be stable, press” TARE", then it displays"0.000g”.

3. Put the standard weight of "20g"on the scale.

4. Press "TARE" after the digital display is stable. Then it displays"20.000g".

5. Press "TARE" again. Then it displays” PASS”. And power off automatically. And the calibration finished.

These calibration directions for this scale on this page