Gives a functional and design specification for flicker measuring apparatus intended to indicate the correct flicker perception level for all practical voltage fluctuation waveforms. Information is presented to enable such an instrument to be constructed. A method is given for the evaluation of flicker severity on the basis of the output of flickermeters complying with this standard.This consolidated version consists of the first edition (1997) and its amendment 1 (2003). Therefore, no need to order amendment inaddition to this publication.