The IEC 6 2059-31 - 1 standard specifies a method for testing electrical energy Measurement equipment under elevated temperature and humidity conditions in accelerated reliability tests. The method is designed to evaluate the long-term reliability and performance stability of the equipment by simulating its working state in a high temperature and high humidity environment. It should be noted that the application of the test methods specified in this standard may not detect failures that do not occur due to temperature and humidity acceleration. In addition, Miscellaneous factors such as temperature changes, vibration, dust, voltage dips and short interruptions, electrostatic discharge, etc., may also affect the reliability of the equipment. Therefore, when conducting accelerated tests, a variety of environmental factors should be comprehensively considered to comprehensively evaluate the reliability of the equipment.