Linking the results of Key Comparisons CCEM-K8 and EUROMET.EM-K8

Key comparisons CCEM-K8 and EUROMET.EM-K8 on DC voltage ratio [1, 2] were carried out in parallel, both having IEN as the pilot laboratory. Two Datron 4902S voltage dividers were used as travelling standards, each divider being dedicated to one comparison. On these dividers the measurements of the ratios 1000 V / 10 V and 100 V / 10 V were mandatory and were used to evaluate the degrees of equivalence of the participants with respect to the reference value of their own comparison. The mandatory measurements were performed by all the 15 participants in CCEM-K8 and by 19 out of the 20 participants in EUROMET.EM-K8.