ESI SR104 Overview
The SR104 Transportable Resistance Standard represents a significant improvement on the classical approach to resistance standards. Establishing a reference level at 10 kohms instead of the traditional 1 ohm, the unit offers a substantial improvement in accuracy and stability at the working resistance level. The extremely low temperature coefficient of this standard facilitates its use for precise interlaboratory comparisons without critical environmental control. Virtually immune to the thermal and mechanical shock sometimes encountered in commercial transport, its accuracy is 5 ppm. It features 5 terminal construction for guarded 4-terminal calibrations. Stability is 1 PPM per year.