An automatic 10V Josephson Series Array Voltage Standard (JSAVS) was integrated, characterized and established for the calibration of Zener reference standard which is the secondary standard of DC voltage. This system works at microwave frequency of 76 GHz. The expanded uncertainty of Zener reference standard calibration at 10V is ± 350 nV at k=2 Figure 2.2 and 2.3 show the block diagram and photograph of the automatic 10V JSAVS. The inset in the photographs shows the dc characteristics and the constant voltage steps (Shapiro steps). With the establishment of this standard NPLI is at par at the international level.

The 1 kΩ standard resistor was calibrated against Quantum Hall Resistance Standard and it was subsequently used to calibrate other standard resistors using automatic DCC bridge. During the above period, total 131 calibration reports were issued. Rs. 11.76 Lakhs as notional value (calibration of instruments of other decision packages to maintain their quality system) and Rs. 7.36 Lakhs as ECF were generated