Calibration of hardness testers is carried out at the completion of hardness testers production. Calibration is performed by VNIIFTRI - National Metrological Institute of Russia. For all hardness testers a "Calibration certificate" of the established form is issued, which is included into the hardness tester delivery set.
Calibration of MET-HRC, MET-HB and MET-HV hardness testers is performed using hardness reference test blocks by a direct method on all main hardness scales - Rockwell C, Brinell and Vickers.
All hardness testers of MET-MINI series are introduced into state Register of Measuring Equipment of Russia and have Certificates of Approval of measuring equipment type.
Centre MET have licenses for their production.