Report on the key comparison, CCM.F-K23 in force at 200 N and 500 N

The working group force of the CCM decided to make a comparison at 200 N and 500 N at the meeting held in Kajaani in November 2014. At the meeting held in Braunschweig in June 2017 it was decided that METAS would be the pilot of this comparison. The working group agreed that the transfer standard would be independently organized by each participating laboratory according to the principle "bring your own device". This solution would reduce the work needed by the pilot and would allow for a fas...

Report on EURAMET supplementary comparison on measurement of a 1 mm stage micrometer

The metrological equivalence of national measurement standards and of calibration certificates issued by national metrology institutes is established by a set of key and supplementary comparisons chosen and organized by the Consultative Committees of the CIPM or by the regional metrology organizations in collaboration with the Consultative Committees. At its meeting in Espoo, 16-17 October 2017, the EURAMET Technical Committee for Length (TC-L) decided to carry out a supplementary comparison...

Experimental realization of robust weak measurements

Traceability for indentation measurements in Brinell-Vickers-Knoop hardness

Hardness is an important material property describing a material's resistance to localized deformation from an indenter pressing or scraping against its surface. It is determined by measuring the indentation size realised on the tested material surface. This can be done by different hardness testing methods, like the Brinell, Vickers and Knoop scales. This project will investigate the indentation measurement phenomena for the above-mentioned scales to provide a better defined, more consistent...