This Standard applies only to newly manufactured ”combined meters”, measuring more than one type of electric energy (e.g. active and reactive) and meters integrating additional functions which are not in the scope of the standards in 2.1, 2.2 and 2.3 and the standard in preparation for static apparent energy meters; these additional functions, all related to electric energy metering are, for instance, maximum demand indicator, time switches, ripple control or radio receivers, etc.