环境试验 第2-18部分:试验 随机试验指南 水

[中文适用范围]： IEC 60068的这一部分提供了适用于在运输、储存或使用过程中可能遭受落水、冲击水、浸没或高压水冲击的产品的测试方法。水测试的主要目的是验证外壳、盖子和密封件在标准化跌落场或浸入水中后（必要时）保持组件和设备处于良好工作状态的能力。这些测试不是腐蚀测试，不能被视为和使用。其他标准中规定的水测试并不是为了模拟自然降雨，而且它们引用的强度太高，无法用于此目的。因此，除了高强度的强度之外，测试R还包括基于自然条件的人工降雨测试，但没有考虑通常与自然降雨相关的高风速。对测试的适用性和选择的严重性给出了指导。 [外文原描述]： IEC 60068-2-18:2017 provides methods of test applicable to products which, during transportation, storage or in service, can be subjected to falling water drops, impacting water, immersion or high pressure water impact. 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 drop field or immersion in water. These tests are not corrosion tests and cannot be considered and used as such. 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. This third edition cancels and replaces the second edition published in 2000. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a. addition of the new test method Rb 3.