The Istituto Nazionale di Ricerca Metrologica (INRIM) and Galileo section of LTF S.p.a. have cooperated for many years in the field of hardness for developing and improving Primary Hardness Standards and measuring systems for their laboratories. With this experience, Galileo-LTF has realized many installations for several NMIs in the world. All these Hardness Standards and measuring systems have been metrologically characterised by INRIM. In the paper, experiences made during the metrological characterization will be shown. They include the methods and results of direct verification of influence parameters (force, displacement, time, velocity, angle, etc.) and of indirect verification (hardness scales or indenters comparison) of the systems.
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机译：istituto nazionale di ricerca metrologica（Inrim）和ltf s.p.a的伽利略部分。在为他们的实验室开发和改进主要硬度标准和测量系统的硬度领域已经合作了多年。通过这种体验，伽利略-TF已经实现了世界上几个NMIS的许多安装。所有这些硬度标准和测量系统都是在造型的特征的特征。在本文中，将显示在计量表征期间进行的经验。它们包括直接验证影响参数（力，位移，时间，速度，角度等）和间接验证（硬度尺度或凹槽比较）的方法和结果。
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