标准摘要
[中文适用范围]： 测试涵盖温度突然和逐渐变化以及非散热和散热样本的测试。酌情涵盖带或不带强制空气循环的测试室的使用。通用框图 [外文原描述]： Gives background information for Tests A: Cold (IEC 68-2-1), and Tests B: Dry heat (IEC 68-2-2). Includes appendices on the effect of: chamber size on the surface temperature of a specimen when no forced air circulation is used; airflow on chamber conditions and on surface temperatures of test specimens; wire termination dimensions and material on surface temperature of a component; measurements of temperature, air velocity and emission coefficient.
英文名称Environmental testing - Part 3: Background information - Section One: Cold and dry heat tests