静电学 第4-7部分：特定应用的标准测试方法 电离

[中文适用范围]： IEC 61340-4-7:2025 CMV包含官方标准及其注释版本。注释版本为用户提供了快速且便捷的方式来比较IEC 61340-4-7:2025第3版与IEC 61340-4-7:2017第2版之间的所有变更。此外，IEC TC 101专家的注释也提供了对最相关变更原因的解释，或对内容部分进行澄清。IEC 61340-4-7:2025为评估和选择空气电离设备和系统（电离器）提供了测试方法和程序。本文件在规定条件下建立了测量技术，用于确定电离器的偏移电压（电荷平衡）和衰减（电荷中和）时间。本文件不包括电磁干扰（EMI）的测量，或电离器在与弹药、易燃物、爆炸品或电引爆爆炸装置相关使用中的内容。根据本文件，电离器的测试方法和测试条件可用于电离器制造商提供描述其产品的性能数据。电离器用户应根据其具体应用修改测试方法和测试条件，以使电离器适用于特定用途，或对电离器性能进行定期验证。用户将决定每种应用所需数据的详细程度。与前一版相比，本版包含以下重大技术变更：a）在图5中，添加了注释3，以澄清对于交流电极条和网格，使用一个在正负极性之间交替的单一发射器；b）在附录B中，测量设备的相对误差已更新，包括对电压表分辨率的考虑。 [外文原描述]： IEC 61340-4-7:2025 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 61340-4-7:2025 edition 3.0 and the previous IEC 61340-4-7:2017 edition 2.0. Furthermore, comments from IEC TC 101 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content. IEC 61340-4-7:2025 provides test methods and procedures for evaluating and selecting air ionization equipment and systems (ionizers). This document establishes measurement techniques, under specified conditions, to determine offset voltage (ion balance) and decay (charge neutralization) time for ionizers. This document does not include measurements of electromagnetic interference (EMI), or the use of ionizers in connection with ordnance, flammables, explosive items or electrically initiated explosive devices. As contained in this document, the test methods and test conditions can be used by manufacturers of ionizers to provide performance data describing their products. Users of ionizers are urged to modify the test methods and test conditions for their specific application in order to qualify ionizers for use, or to make periodic verifications of ionizer performance. The user will decide the extent of the data required for each application. This edition includes the following significant technical changes with respect to the previous edition: a) in Figure 5, a NOTE 3 was added to clarify that for AC bars and grids, a single emitter alternating between +/− polarity is used; b) in Annex B, the relative error for measurement equipment was updated to include the consideration for the resolution of the voltmeter.