Temperature control method for AC resistance standard
Double Helix Resistor (DHR), a kind of calculable AC/DC resistor that can be traced to quantum standard, is being developed as AC resistance standard in National Institute of Metrology (NIM). In order to improve the value stability of DHR, this paper presents a practical temperature auto-feedback control method based on four-arm electric bridge. The bridge uses one thermistor to detect temperature variation and one adjustable resistor to regulate bridge ratio. The temperature inside the specially designed resistance box can be changed and well maintained through dynamically regulating and balancing the bridge. Measurement results show that the relative stability of DHR is greatly enhanced by using the presented method.
AC resistance standard Double Helix Resistor temperature control.
Qu Zhengwei Wang Yunjing
State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Tsinghu Institute of Electrical Engineering,Yanshan University No.438,West of Hebei Avenue,066004 Qinhuangda
国际会议
2011 10th International Conference on Electronic Measurement & Instruments(第十届电子测量与仪器国际会议 ICEMI2011)
成都
英文
551-554
2011-08-16（万方平台首次上网日期，不代表论文的发表时间）