
Direct acting indicating analogue electrical measuring instruments and their accessories Part 1: Definitions and general requirements common to all Parts
出版:Japanese Standards Association

专家解读视频
This Standard applies to direct acting indicating electrical measuring instruments having analogue display, such as: ammeters and voltmeters; wattmeters and varmeters; frequency meters of pointer and vibrating-reed types; phasemeters, power-factor meters and synchroscopes; ohmmeters, impedance meters and conductance meters; multi-function instruments of the above types.