Applies to X-t recorders used for the measurement of voltage and current which measure and record analogue electrical quantities as a function of time. Also applies to non-interchangeable accessories and accessories of limited interchangeability (e.g. shunts, impedance-elements) if they are used with the recorder and the adjustments have been made for the combination. IEC 61143-1 and IEC 61143-2 cancel and replace IEC 60484 (1974).This consolidated version consists of the first edition (1992) and its amendment 1 (1997). Therefore, no need to order amendment inaddition to this publication.