标准摘要
Applies to direct indicating electrical measuring instruments having analogue display, such as: ammeters, voltmeters, wattmeters, varmeters, phasemeters, frequency meters, synchroscopes and ohmmeters. Also applies to certain accessories used with such apparatus, e.g., shunts, series resistors and impedance elements.
英文名称Direct acting indicating analogue electrical measuring instruments and their accessories. Part 1: Definitions and general requirements common to all parts