9. How it works

The procedure for calibrating a weight includes the following operations:

• cleaning (if necessary) ;

• thermal stabilization of the weight before calibration;

• determination of stabilization time ;

• mass comparator repeatability test;

• weight calibration ;

• calculating conventional mass ;

• calculating measurement uncertainty ;

• evaluation of results (classification) ;

• issue a calibration certificate.

Each of these operations is developed in the following paragraphs.

Further information on marking, use and storage of weights...