环境试验 第2-18部分:试验 随机试验指南 水

[中文适用范围]： GB／T 2423的本部分规定了适用于在运输、贮存或使用期间可能遭受滴水、冲水或浸水的电工电 子产品的试验方法，是考核电工电子产品的外壳和遮盖物等密封件在水试验后或在试验期间能否保证 设备和元件良好的工作性能。 本部分所规定的试验方法不适用于腐蚀试验。 本部分不模拟水和试件之间的大温差作用，例如由于压力变化和热冲击而引起的进水增多。 本部分包括了以自然条件为基础的人工淋雨试验，但通常情况下不考虑有强风速的自然降雨。 本部分对所选择的试验和严酷等级的应用给出了导则。 本部分可作为产品技术标准的引用依据。 [外文原描述]： IEC 60068-2-18:2000 Provides methods of test applicable to products which, during transportation, storage or in service, may be subjected to falling drops, impacting water or immersion. The primary purpose of water tests is to verify the ability of enclosures, covers and seals to maintain components and equipment in good working order after and, when necessary, under a standardized dropfield or immersion in water. These tests are not corrosion tests and should not be considered and used as such. The effects of a large temperature difference between the water and the specimen, such as increased water ingress resulting from pressure changes, as well as thermal shock, are not simulated. Established water tests in other standards are not intended to simulate natural rainfall and their quoted intensities are too high to be adopted for that purpose. Therefore, in addition to the high-intensity severities, Test R includes an artificial rain test based upon natural conditions but not taking into account high wind speeds generally associated with natural rain. Guidance is given on the applicability of the tests and the severities to be selected. It has the status of a horizontal standard in accordance with href="https://webstore.iec.ch/publication/7516">IEC Guide 104 .