scope:

This standard applies to direct acting indicating electrical measuring instruments having an 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. It also applies to certain accessories used with these instruments, such as: - shunts; - series resistors and impedance elements. If other accessories are associated with instruments, this standard is applicable to the combination of the instrument and the accessory provided that the adjustments have been made for the combination.