Comparison of small current sources

Project Description 

In the last few years several European institutes have independently developed current sources, based on the idea of applying a voltage ramp to a capacitor. These current sources are already or will be used in the near future as standards for calibrating commercial picoammeters for internal use or for customers. The currents generated by these sources are typically in the range from 10 fA to 100 pA, with corresponding typical uncertainties from a few aA to a few fA. In order to support their CMC’s, the project partners aim to compare their standards by means of a supplementary comparison.

Final Report 2013-03-26

The comparison has been completed and results are available in the KCDB.

Electricity and Magnetism (EM)
Gerd-Dietmar Willenberg, PTB (Germany)
Phone: +49 531 592 2141
Fax: +49 531 592 2105
Coordinating Institute
PTB (Germany)
Further Partners
INETI (Portugal)
VNIIM (Russia)