In the process of second supervisory assessment and evaluation in order to expand the scope of accreditation by the Accreditation Body of Serbia, Directorate of Measures and Precious Metals (DMDM) managed to prove their competence for calibration of short gauge blocks by interferometric method, and to extend accreditation for calibration field to calibration of measuring instruments for pressure and volumetric flow rate of liquids (rotameters). Extended DMDM scope of accreditation for calibration can be found at: http://www.registar.ats.rs/predmet/671/.