ISO 17025 accreditation conform R 46

Recently the ISO 17025 accreditation of NMi was extended with the OIML R 46, which is good news for manufacturers of electricity meters. This means that NMi can not only test electricity meters in accordance with the IEC 62052 / 62053 series, the EN 50470 documents but also with the OIML R 46.

The OIML R 46 was published last year and will primarily be important in order to obtain metrological approvals in countries such as Australia, South-America, China and other Asian countries. Up till now NMi is the only OIML Issuing Authority that is allowed to issue OIML Certificates of Conformity for the R 46. Please see The document itself can be downloaded on the OIML website.

At this point both MIRS from Slovenia and NMi are preparing the cross reference of the OIML R 46 with the MID. This means that in the near future the R 46 can also be used as a normative document to issue EC type examination Certificates under the MID in Europe.

Henri Schouten

Henri Schouten

Business Development Manager Utilities, Worldwide

Expert for all utility residential meters (electricity/ gas/ water/ heat). Member/ chairman of multiple IEC, CENELEC, OIML and WELMEC groups. Chairman of the Dutch mirrorgroup NEC13. One of the writers of OIML R137.