How do you calibrate a cen-tech scale?

To calibrate a Cen-Tech scale, first, ensure the scale is on a stable, level surface. Turn it on and allow it to warm up for a few minutes. Use standard weights that you know the exact weight of, placing them on the scale to check accuracy. If the reading is off, adjust the calibration settings according to the scale's manual, typically by using a calibration knob or digital settings, until the scale reads correctly with the standard weights.