What to use to calibrate scales to 500g?

To calibrate scales to 500g, you can use certified calibration weights specifically designed for this purpose. These weights are available in various materials, such as stainless steel or brass, and should be marked with their exact weight for accuracy. Ensure that the scale is placed on a stable surface and follow the manufacturer's instructions for calibration. Always verify the scale's accuracy after calibration with additional weights if possible.