Calibration Weights are used to check the reading of scale, to make sure it is still accurate. They used when calibrating a scale.
While the calibration states how a scale behaves, adjustment of the scale changes its behavior. What it dose is a set of operations carried out on a scale so that it provides prescribed indications corresponding to given values of a quantity to be measured.
Therefore, adjusting a scale means modifying its indications in a way that allows them to correspond – as much as possible – to the quantity values of the measurement standards applied.
OIML Class F2 Calibration Weights - For calibration of semi-analytical balances and for student use. OIML Class F2 calibration weights and weight sets should be used in classroom settings or where simple weight calibrations are needed. Class F2 weights can be used to calibrate Class III, Class IIIL, or Class IIII digital scales or other weighing scales.