HTT is accredited by the General Accreditation Directorate (DPA) for carrying out laboratory tests in accordance with the standard S SH EN IEC / ISO 17025:2006, Certificate No. L027. HTT has been reaccredited on 23.03.2017 after three years of testing activities in the field of electric meters, Certificate No. L068.
HTT is accredited by the Institute of Accreditation of the Republic of North Macedonia (IARNM) for performing the laboratory calibrations in accordance with the standard MKC EN ISO / IEC 17025:2018, Certificate LC-011.
HTT is accredited by the General Accreditation Directorate (DPA) for performing on-field inspections in accordance with the standard ISO / IEC 17020:2012, Certificate TI 027.