EVOLUTIONS IN HARDNESS SCALES DEFINITION |
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| Giulio Barbato, Alessandro Germak, Konrad Herrmann, Samuel Low |
- Abstract:
- A conventional characteristic of hardness measurements is the strong dependency on the official definition of each scale. For this reason, and to assure a good connection between National Metrology Institutes (NMIs), scientific organizations (e.g., IMEKO1) and international organizations for standardization (e.g., ISO2 and OIML3), a new Working Group on Hardness (WGH) was created a few years ago under the Consultative Committee for Mass and Related Quantities (CCM) of the Comité International des Poids et Mesures (CIPM). One of the principal aims of the WGH is to analyze the level of accuracy corresponding to the state-of-the-art of national primary standards, ultimately leading to improvements in the hardness scale definitions and, at the same time, providing well-defined traceability, in terms of uncertainty, of industrial measurements. Recent efforts to improve hardness scale definitions and the consequential reduction of uncertainty are presented in this paper. Contributing to this effort are the NMIs that currently maintain hardness standards and those that have plans to realize them in the near future. By improving the definitions and the associated uncertainty, certain advantages will be obtained at all levels in the dissemination of hardness standards: from the calibration and testing laboratories to industrial measurement applications.
- Keywords:
- hardness scales, definitions, uncertainty
- Download:
- PWC-2003-TC5-003.pdf
- DOI:
- -
- Event details
- Event name:
- XVII IMEKO World Congress
- Title:
Metrology in the 3rd Millennium
- Place:
- Dubrovnik, CROATIA
- Time:
- 22 June 2003 - 28 June 2003