Digital sampling setup for calibration of strain gauge bridge calibration unit BN100

This paper describes minimalistic, economic, automated, digital sampling calibration setup for calibration of a strain gauge bridge calibration unit BN100 or similar high division ratio dividers. The setup uses impedance divider instead of the IVD as the reference divider. It achieves comparable or better uncertainty for division ratios below 1 mV/V compared to the IVD based methods. For 1 mV/V the expanded uncertainty (k = 2) is 8 nV/V from the input.