The 752A Reference Divider sets the standard for direct voltage ratio accuracy and ease of use. It offers two divider outputs, 10:1 and 100:1 with output uncertainties of less than 0.2 ppm and 0.5 ppm respectively. The unit also includes internal switching for calibrating the 100 mV, 1 V, 10 V, 100 V, and 1000 V ranges of a voltage calibrator to a 10 V reference source without having to change the lead connections. It provides the voltage division capability required to calibrate state of the art calibrators and similar instruments.