An Automated Test Equipment for Calibration of Energy Meters

摘要

Calibration of electrical energy meters (EEM) is coming up as a metrological concern. Latest EU directives, about measuring instruments adopted for commercial transactions, state that their accuracy must be verified in actual operating conditions. This requirement is leading all laboratories involved in EEM calibration in serious difficulty because this kind of metrological verification is, at the moment, still not fully developed or even clarified. In this paper a proper automated measurement station able to perform calibration, also on-site, is presented, the compensation techniques for improving spectral purity of test signals integrity are discussed, finally performance evaluation and examples of EEM metrological verification are shown.