Pilot study comparison of developed and improved mass scale measurement capabilities

The objective of the Pilot Study was the calibration of sub-multiples of the kilogram, which was organised as a EURAMET Pilot Study in order to demonstrate a diagnostic comparison for the developed and improved Calibration Measurement Capability (CMC), while realising the mass scale of the participating National Measurement Institutes (NMIs). Due to the instability of some weights a simplified method was used to evaluate the results. It compares the laboratory result for each weight with the reference value obtained by the fitted weighted trendline, including the correlation due to the Consensus Value. It was the first time that the method of subdivision of a decade has been compared among laboratories by comparing the individual mass differences of the design matrix. The aim of improving capabilities and realising the mass scale with uncertainties of 1/3 mpe of the OIML Class E1 tolerance was achieved by the participating NMIs.