环境测试 - 第 3-4 部分：支持文件和指南 - 湿热测试

[中文适用范围]： IEC 60068-3-4:2023 以 IEC 60068-3-4:2023 RLV 形式提供，其中包含国际标准及其红线版本，显示了与前一版本相比技术内容的所有变化。IEC 60068-3-4： 2023 提供了环境测试中湿度影响的必要信息和基本原理，以协助准备相关规范，例如组件或设备的标准。此外，还提供了有关操作气候测试室的信息。第二版取消并取代了 2001 年发布的第一版。该版本构成了技术修订。与前一版本相比，本版本包括以下重大技术变化： a) 修订了蒸馏水和去离子水的要求； b) 已包含有关测试室清洁程序的建议； c) 增加了加湿系统（超声波加湿器和雾化器）； d) 细化了水渗透机制的描述。 [外文原描述]： IEC 60068-3-4:2023 provides the necessary information and the basic principles of the effect of humidity in the context of environmental testing to assist in preparing relevant specifications, such as standards for components or equipment. Furthermore, information is provided on operating climatic test chambers. This second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the requirements for distilled and deionized water have been revised; b) recommendations for the cleaning procedure of test chambers have been included; c) humidification systems (ultrasonic humidifiers and atomizers) have been added; d) the description of water penetration mechanisms has been refined.