This part of IEC 60 is applicable to complete Measuring Systems@ and to their components@ used for the measurement of high-voltages and currents during tests with direct voltage@ alternating voltage@ lightning and switching impulse voltages and for tests with impulse currents@ or with combinations of them as specified in IEC 60-1.The limits on measurement uncertainties stated in this International Standard apply to test levels stated in IEC 71-1. The principles of this International Standard apply also to higher levels but the uncertainty may be greater.This standard:- defines the terms used@- states the requirements which the Measuring Systems shall meet@- describes the methods for approving a Measuring System and checking its components@- describes the procedure by which the user will show that a Measuring System meets the requirements of this standard.