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Influence of Adaptor on the Calibration of Inductance Standards

  • Kassim, Dewi Mohd (University of Science and Technology, (UST)) ;
  • Kim, Dan Bee (Korea Research Institute of Standards and Science, (KRISS)) ;
  • Kim, Wan-Seop (Center for Electricity & Magnetism, Korea Research Institute of Standards and Science, (KRISS))
  • 투고 : 2017.12.11
  • 심사 : 2018.01.02
  • 발행 : 2018.03.01

초록

Influence of the adaptors on the calibration of $100{\mu}H$ inductance standard was studied as a function of torque, applied when tightening the standard inductor terminal with the adaptor. Two different homemade adaptors of BPO gold-plated brass (BPO-Au) and banana-copper (BN-Cu) were made for the connection between the LCR meter and the inductance standard. The measured inductance (L) of the standard inductor and the contact resistance ($R_C$) between the adaptor and the standard inductor terminal showed exponential decreases against the torque increase from $25cN{\cdot}m$ to $150cN{\cdot}m$. The measured L and the calculated equivalence series resistance ($R_S$) were dependent on the adaptor type as well as on the $R_C$. The results of the adaptor analysis imply that the BPO-Au adaptor with the lower $R_C$ is more suitable for the inductance calibration. The calculated inductance of $99.956{\mu}H$ corrected by subtraction of the adaptor inductance and the contact resistance contributions from the measured value using the BPO-Au adaptor agreed well with the certificate ($99.948{\mu}H$) of the PTB within the measurement uncertainty of $140{\mu}H/H$.

과제정보

연구 과제번호 : Development of Electro-Magnetic Measurement Standards and Application Technologies

연구 과제 주관 기관 : Korea Research Institute of Standards and Science

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