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 E1 Reference Weights - Used as a primary reference for calibrating other reference standards and calibration weights where the stability of the environment and careful handling are assured. OIML Class E1 reference weights and weight sets should be used in calibration laboratories, metrology departments, or other similar weight calibration environments. OIML Class E1 weights can be used to calibrate analytica balances and Class I and Class II laboratory balances. OIML Class E1 weights are equivalent to ASTM Class 00 weights.