Defines test methods for immunity to ripple at the d.c. input power port of electrical or electronic equipment. Applies to low-voltage d.c. power ports of equipment supplied by external rectifier systems, or batteries which are being charged.This standard defines- test voltage waveform;- range of test levels;- test generator;- test set-up;- test procedure.This consolidated version consists of the first edition (1999) and its amendment 1 (2001). Therefore, no need to order amendment inaddition to this publication.