The JSA JIS C 60068-3-5 standard provides supporting documents and guidelines for the performance validation of temperature boxes in environment testing. The standard is designed to ensure the accuracy and Reliability of temperature boxes in environment testing, and is suitable for high temperature, low temperature and temperature cycle testing of electronic components. The standard specifies the performance validation items of temperature boxes in detail, including Temperature uniformity, fluctuation, deviation, door opening test and power-off insulation test. Through these tests, the performance of temperature boxes under no load and full load can be evaluated to ensure that it meets the requirements of environment testing. This standard provides laboratories and manufacturers with a uniform method of performance verification, which helps to improve the accuracy and repeatability of test results.