Automated voltage divider to calibrate a 10-V output of Zener voltage standard

The authors present a voltage divider developed to calibrate the 10-V output of a Zener-diode voltage standard with reference to a 1-V Josephson array voltage standard. The ratio of the divider can be automatically self-calibrated by a digital voltmeter and a switching system controlled by a computer. The principle used for ratio calibration of the voltage divider is discussed. The configuration used for measurement of the divider ratio and the configuration used for calibration of the 10-V output of the Zener standard are described. The operation of the system is also described.<>