1.1 本试验方法包括测定电线电缆填充化合物和相关材料的损耗因子、介电常数（介电常数）和交流体积电阻率，这些材料在室温下为固体，但在高温下能够熔化。 1.2 每当以不同单位呈现两组值时，第一组中的值为标准值，而括号中的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 第节给出了具体的危险说明 7. . 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 损耗因子、介电常数和直流体积电阻率是通信电缆填料和填料组件的特性，这些填料和组件受到控制，以使电缆的电气性能在其设计极限内。极性化合物、水或盐等相对少量的污染物会降低电缆的电气性能。 电缆填充化合物的介电性能限制通常由电缆制造商、行业标准或两者规定。

1.1 This test method covers the determination of dissipation factor, permittivity (dielectric constant), and ac volume resistivity of wire and cable filling compounds and related materials that are solid at room temperature, but capable of being melted at elevated temperature. 1.2 Whenever two sets of values are presented, in different units, the values in the first set are the standard, while those in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 7 . 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Dissipation factor, permittivity, and dc volume resistivity are properties of communication cable fillers and filler components that are controlled in order that the cable's electrical performance falls within its design limits. Relatively small amounts of contaminants, such as polar compounds, water, or salts degrade the cable's electrical properties. Limits on the dielectric properties of the cable filling compound are usually specified by the cable manufacturer, by industry standards or both.