While the scale is off, press and hold the ON/OFF button and ZERO button at the same time. - The LCD will read “CAL” in the upper right.
2. Press the ZERO button again and the LCD will flash “500.0g”
3. Place a 500g calibration weight onto the center of the platform.
4. The LCD will read “PASS” then return to the normal weighing mode
5. Calibration is complete.