1 ScopeThis part of IEC 62059 provides one of several possible methods for estimating product lifecharacteristics by accelerated reliability testing.Acceleration can be achieved in a number of different ways. In this particular standard,elevated, constant temperature and humidity is applied to achieve acceleration. The methodalso takes into account the effect of voltage and current variation.Of course, failures not (or not sufficiently) accelerated by temperature and humidity will not bedetected by the application of the test method specified in this standard.Other factors, like temperature variation, vibration, dust, voltage dips and short interruptions,static discharges, fast transient burst, surges, etc. – although they may affect the lifecharacteristics of the meter – are not taken into account in this standard; they may beaddressed in future parts of the IEC 62059 series.This standard is applicable to all types of metering equipment for energy measurement, tariffandload control in the scope of IEC TC 13. The method given in this standard may be usedfor estimating (with given confidence limits) product life characteristics of such equipmentprior to and during serial production. This method may also be used to compare differentdesigns.