This technical report demonstrates the capabilities to measure niobium-based Josephson junction arrays at liquid helium temperatures at less than 50 mV. We find current switching with voltage consistent with the transition from Cooper-pair to quasiparticle tunneling. The results agree with the industrial manufacturers specifications. We use a recently created empirical model applicable to Josephson junction devices and arrays and obtain excellent fits to the characteristics and extract the non-ideality. These capabilities and calibration results will assist in the characterization of advanced superconductor-ionic quantum memory and computation devices.