Database management system of AC Voltage Standards

The paper presents a database management system of AC voltage standards maintained in the Laboratory of AC-DC Standards of Institute of Measurement Science, Electronics and Control, Silesian University of Technology, Gliwice, Poland. The database stores the basic metrological parameters and other details of the standards, especially their AC-DC transfer differences at different voltages and frequencies. The database also stores previous (historical) values of the AC-DC transfer differences of the standards which enables the observation of time drift of these parameters.