Are both scales plugged into the same power source? Have you tried swapping the power supplies? Is either scales close to a source of EMR (electromagnetic radiation).
Are you zeroing the scale with the lid close and the weighting pan removed? Using the same weight? Checking the weight of the reference weight after calibration?
Are you zeroing the scale with the lid close and the weighting pan removed? Using the same weight? Checking the weight of the reference weight after calibration?
