This International 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 IEC 60687, IEC 61036, IEC 61268 standards 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. When other devices and functions not related to electric energy metering and billing are enclosed in the same meter case this standard applies only to the energy metering and processing section. For all the meter characteristics and functions already described in existing standards, these standards will apply for the corresponding characteristics and functions.