Linearity Testing of High Precision Digital Voltmeters with Programmable Josephson Voltage Standard

Programmable Josephson Voltage Standard (PJVS) recently established in TUBiTAK UME, is used to investigate the linearity of the high precision digital voltmeters (DVM). The new system with fast settling and stable output voltages is an efficient tool to test DVM linearity from 0 to $\pmb{\pm 10}\mathbf{V}$ with an uncertainty better than $\pmb{0.1\mu} \mathbf{V}/\mathbf{V}$