New Setup for Bridge Amplifier Linearity Investigation

We present a setup for linearity investigation of high precision bridge amplifiers as used for strain gauge transducer in static force and torque measurements. The setup allows to characterize bridge amplifiers in much more detail than the 0.1m V/V step size of the BN100 bridge standard or a recently proposed resistor-based strain gauge bridge transducer simulator. Only with the presented linearity investigation setup it is now possible to verify the specified uncertainty of high precision bridge amplifiers of \pmb5. 10
^-6
mV/V at 225 Hz.