| Title |
Development of a Ratio Calibration Bridge for Inductive Voltage Dividers |
| Authors |
강전홍(Kang Jeon Hong) ; 한상옥(Han Sang Ok) ; 김한준(Kim Han Jun) |
| Keywords |
권선 ; 전압 비 교정 IVD(Inductive Voltage Divider) ; Totoidal Core ; Inphase ; Quadrature Error ; Bridge |
| Abstract |
A inductive voltage divider(IVD) is widely used as a ratio arm of precise impedance measurement bridges at low frequencies of audio frequency range and a well fabricated IVD has ratio error of 10^{-7} order without any calibration. Recently, the order of 10^{-8} of the best measurement uncertainty is needed for calibration and maintenance of impedance standards as national standards. In order to achieve that uncertainty, the IVD which is used for a ratio arm of precise impedance measurement bridge should be calibrated within the uncertain of order of 10^{-8} For this purpose, a ratio calibration bridge for IVDs has been developed. The measurement uncertainties of both inphase and quadrature of the bridge are analyzed less then 3×10^{-8} respectively at 1 kHz and 25 V. |