This part of IEC 61083 is applicable to digital recording instruments used for measurements during tests with high alternating and direct voltages and currents It specifies the measuring characteristics and calibrations required to meet the measuring uncertainties and procedures specified in the relevant IEC standards (e.g. IEC 60060-1, IEC 60060-2, IEC 60060-3, IEC 62475, IEC 61180). This standard is applicable to those digital recording instruments that are designed and type tested after publishing of this standard. Digital recording instruments are considered as black boxes (including Hardware, Firmware, and Software). They are characterised for their intended application by physical calibration with the waveforms needed for that application. This part " defines performance requirements for digital recording instruments used during tests with alternating voltages and currents (AC) or direct voltages and currents (DC); " specifies the necessary requirements for such instruments to ensure their suitability for use under the relevant standards; " establishes the tests and procedures necessary to demonstrate their compliance; " defines the terms related to digital recording instruments with recording function and access to raw data. NOTE 1: Examples for relevant alternating and direct voltages and currents to be measured are listed in Annex D.