Metrological Characterization of a Primary Vickers Hardness Standard Machine- NIS Egypt 1 Metrological Characterization of a Primary Vickers Hardness Standard Machine- NIS Egypt

The main goal of NIS is to provide traceability to international measurement standards to help the Egyptian industry to penetrate world markets. One of the most important fields of metrology is hardness measurements. A Primary Vickers Hardness Standard Machine (PVHM) was designed to improve the capabilities to qualify the primary hardness test blocks locally. The machine has been constructed to perform Vickers hardness test for scales HV10, HV20, HV30, and HV50 with expanded uncertainty of ±1.4 %.This standard machine has been metrologically characterized by NIS. In this paper metrological characterization of the machine will be shown. The characterization includes the methods and results of direct verification of influences parameters (test forces, indentation measuring system, indenter and test cycle time), and a comparison with PTB standard machine. © Metrology Society of India, All rights reserved 2010. 1