GB2424.1 电工电子产品环境试验 高低温试验导则.pdf

ICS 19.040 K 04 IOjMj黯 中 华 人 民 共 和 国 国 家 标 准 GB/T2424.1-2005/IEC60068-3-1:1974 代替GB/T2424.1-1989 电工电子产品环境试验 高温低温试验导则 Environmentaltestingforelectricandelectronicproducts- Guidanceforhightemperatureandlowtemperaturetests (IEC60068-3-1:1974,Basicenvironmentaltestingprocedures- Part3:Backgroundinformation-Section1:Coldanddryheattestsand IEC60068-3-IA:1978,Firstsupplementtopublication60068-3-1,IDT) 2005-03-03发布 2005-08-01实施 中华人民共和国国家质量监督检验检疫总局 发 布 中 国 国家 标 准 化 管 理 委 员 会 GB/T 2424.1-2005/IEC 60068-3-1:1974 目 次 前 言 ···············································，······················…… m 1 引言 ···············································································································…… 1 2 不同试验规程的依据 ·······，···············································································…·…2 3 试验箱 ············································································································…… 4 4 测量 ·············································································································…… 5 对IEC60068-3-1;1974基《本环境试验规程 第3部分:背景材料 第1节:寒冷和干热试验》 的第一次补充文件 ······················································，····，································……6 附录A (资料性附录) 无强迫空气循环试验时试验箱大小对试验样品表面温度的影响 ·········…… 8 附录B(资料性附录) 气流对试验箱条件和试验样品表面温度的影响 ······························…… 10 附录C(资料性附录) 样品辐射系数对温度升高的影响 ··············································……14 附录D(资料性附录) 组件线端尺寸和材料对其表面温度的影响 ····································…… 15 附录E(资料性附录) 热传输计算及列线图 ····················································