IET Labs / Quadtech / General Radio / Genrad 1417 Capacitance Standard

The 1417 Four-Terminal Capacitance Standard consists of a 1-?F standard capacitor and two precise inductive voltage dividers used to scale the value of the 1-?F capacitor up to 1 F in decade steps. This arrangement provides accuracy and stability unattainable with very high-value true capacitors. 0.25% basic capacitance accuracy 0.02 to 0.25% ratio accuracy Dissipation-factor standard