CCE comparison of AC-DC voltage transfer standards at the lowest attainable level of uncertainty

In May 1996 the international comparison of AC-DC voltage transfer standards at the lowest attainable level of uncertainty, which started in Jan. 1994, was completed. A PTB multijunction thermal converter was used as the traveling standard. The results show an agreement of the majority of the participating National Metrology Institutes with the average value of better then 0.5/spl times/10/sup -6/ at the frequency of 1 kHz, 0.6/spl times/10/sup -6/ at 20 kHz, 1.4/spl times/10/sup -6/ at 100 kHz, and 15/spl times/10/sup -6/ at 1 MHz.