Calibration

When calibrating weighing equipment, the weighing is verified, and possible deviations are documented.

When calibrating weights, updated procedures are used; and a certificate is issued indicating the weight class according to the criteria established in OIML Directive R111-2004, of international validity, which classifies the test weights in hierarchical form, in various kinds of precision.

Fine accuracy

• F1 - This accuracy class is used for calibration of F2 class weights and for calibration of weighing instruments of accuracy class I and II. 
• F2 - This accuracy class is used for calibration of M1 class weights and for calibration of weighing instruments of accuracy class II involved in major business transactions (eg, precious metals and stones).

Medium accuracy

• M1 - This accuracy class is used for calibration of M2 class weights and for calibration of weighing instruments of accuracy class III.
• M2 - This accuracy class is used for calibration of M3 class weights and for calibration of weighing instruments of accuracy class III used in general business transactions.