Reference standard digital recorder with 200 MS/s-12 bit for HV impulse tests

The paper describes the hardware of a new generation of digital recorders, designed and optimized to fulfil all requirements for measuring of full or chopped lightning, switching and current impulses according to all applicable standards. Such digital recorders are required for Accredited Laboratories and National Metrological Laboratories. The results of the official calibration of the first digital recorder type TR-AS 200-12 performed by the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig are shown. This digital recorder is available now as Reference Standard of Measurement in our DKD Calibration Laboratory for electrical impulse parameter. The technical data and software properties are described