A description is given of a resistance bridge based on a cryogenic current comparator covering a range of 1-12 906 Omega . Type-B ('systematic') uncertainty contributions are carefully evaluated and are less than 0.004 p.p.m. (1 sigma ). Type-A or random contributions are 0.006 p.p.m. ( sigma , 20 min.) in a transfer of the quantized Hall resistance R/sub H/ (i=2) to 100 Omega . Measurements relating h/2e/sup 2/ to Omega /sub VSI/ maintained by the Van Swinden Laboratory are presented, showing agreement to 0.09 p.p.m. with the results of other national standards institutes.
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机译：给出了一种基于低温电流比较器的电阻桥的描述，其覆盖范围为1-12 906Ω。 B型（“系统性”）不确定性因素经过仔细评估，且小于0.004 p.p.m.。 （1西格玛）。 A型或随机供款为0.006 p.p.m. （σ，20分钟），将量化的霍尔电阻R / sub H /（i = 2）转换为100Ω。提出了与Van Swinden实验室维护的Ω/ sub VSI /有关的h / 2e / sup 2 /的测量结果，表明与0.09 p.p.m.一致。与其他国家标准机构的结果。
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