Why Should I Use Certified Calibration Weights?

ASTM class 0 and ultra-class as well as OIML class "E0" and E1 should be used for the highest level of precision i.e. mass standards (calibrating other weights), micro-balance testing and calibration, and critical weighing applications.

ASTM classes 1 & 2 and OIML classes E2 & F1 should be used for precision applications i.e. analytical balance testing and calibration.

ASTM classes 3 & 4 and OIML classes F1 & F2 are best suited to top-loading balance calibrations and testing and moderate precision applications (laboratory non-critical).

Important Note: If a balance or scale is calibrated, the weight set used and the class must be documented. This documentation is crucial for maintaining traceability and ensuring compliance with quality management systems and regulatory requirements.

Choosing the right class of certified weights is essential for achieving the desired level of accuracy in your weighing processes. Using weights of insufficient accuracy can lead to measurement errors that compromise the quality and reliability of your results.