In this paper an equipment for precise measurement of QHR in NIM is described.The essential parts in this equipment are a resistance comparator of one-to-one ratio with a comparison uncertainty of 3×10-8 and two ...In this paper an equipment for precise measurement of QHR in NIM is described.The essential parts in this equipment are a resistance comparator of one-to-one ratio with a comparison uncertainty of 3×10-8 and two specially designed resistor networks for determination of ratio between 12906.4035Ω of QHR at i=2 and 10kΩ or 1kΩ The transfering procedure from QHR to 10kΩ or 1kΩ can be completed easily with this equipment by a few one to one comparisons with a total uncertainty of展开更多
基金The project is supported by Natural Science Foundation Committee of China
文摘In this paper an equipment for precise measurement of QHR in NIM is described.The essential parts in this equipment are a resistance comparator of one-to-one ratio with a comparison uncertainty of 3×10-8 and two specially designed resistor networks for determination of ratio between 12906.4035Ω of QHR at i=2 and 10kΩ or 1kΩ The transfering procedure from QHR to 10kΩ or 1kΩ can be completed easily with this equipment by a few one to one comparisons with a total uncertainty of
