The reference step method for DC voltage at 1 mV and 10 mV

Abstract

We have investigated the performance of a method called the Reference Step Method at low voltage levels. The method has been evaluated earlier at voltage levels from 0.1 V to 1 kV with excellent results. The advantages of this method are that it uses commonly available equipment and can be fully automated. We have made comparisons with three other lowvoltage methods and the differences show that the uncertainties can be less than 30 μV/V at 1 mV and 3 μV/V at 10 mV, making it possible to use this method to perform automated calibration of calibrators with sufficient accuracy for calibration of high-end instruments.Index Terms -DC voltage ratio, dc range calibrators, dc voltage scale, dc voltage build-up, low voltage measurements.

Automatic DC voltage precision resistive divider with ratios between 10:1 and 107:1

“…NMIs and laboratories without JVS need alternative methods. In [16][17][18][19][20] interesting solutions to calibrate sources and meters, also at low voltages, with easily available standards, are proposed. The aim of the construction of the INRIM divider, as part of the INRIM technology transfer task, was just the realization of a standard to involve, after its characterization, in a setup for calibration of nanovoltmeters extending the INRIM DC Voltage CMCs to lower values that current ones.…”