DC Voltage

Representation of the DC Voltage unit

Josephson DC Voltage Standard as Primary Standard

The representation of DC voltage at BEV is based upon the Josephson effect. Calibrations of extremely high-stable electronic voltage standards and of voltmeters with the highest resolution can be achieved with the Josephson-Standard.

Electronic DC Voltage Standards used as Working Standards

A set of electronic working standards is calibrated as a result of the high-precision representation of the unit of direct voltage through the Josephson effect. These electronic voltage standards use a hermetically sealed and heated zener diode as an internal voltage reference. The electronic voltage standards generate an output voltage of 1.018 V and 10 V.

Voltage standards and voltmeters are calibrated against this set of working standards.

Higher DC voltages are split by a resistive divider into voltages between 1 V and 10 V and subsequently measured with a voltmeter connected to the Josephson standard.