1.1 本试验方法涵盖了一般分类为中等导电性且既非良好电绝缘体也非良好导体的材料的电阻和电阻率的测定。 1.2 本试验方法适用于体积电阻率在10 0 至10 7. Ω-cm或10范围内的表面电阻率 3. 至10 7. Ω（每平方米）。 1.3 本试验方法设计用于在23°C和50°C的标准条件下进行测量 % 但其操作原理可应用于在较低或较高温度和相对湿度下测量的试样。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 具体的预防说明见 8.3 . 1.5 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 该试验方法可用于材料比较、质量控制试验和规范目的。 5.2 本试验方法适用于电线、电缆、套管、高压旋转机械和其他有屏蔽或电压应力分布价值的电气设备中材料的选择和使用。 5.3 市售的“中等导电”材料通常由导电和电阻成分组成（即，纤维素纤维，其部分表面附着有胶体炭黑颗粒，或粘附在电绝缘聚合物表面的离散导电颗粒）。 这种市售材料通常以导致导电各向异性的方式制造。因此，使用这种测试方法进行测试的重要性取决于测试样本的电场方向以及该方向与使用这些材料的电气设备中材料的方向之间的关系。

1.1 This test method covers the determination of electrical resistance and electrical resistivity of materials that are generally categorized as moderately conductive and are neither good electrical insulators nor good conductors. 1.2 This test method applies to the materials that exhibit volume resistivity in the range of 10 0 to 10 7 Ω-cm or surface resistivity in the range of 10 3 to 10 7 Ω (per square). 1.3 This test method is designed for measurements at standard conditions of 23 °C and 50 % relative humidity, but its principles of operation can be applied to specimens measured at lower or higher temperatures and relative humidities. 1.4 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 precautionary statements are given in 8.3 . 1.5 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 This test method is useful for the comparison of materials, as a quality control test, and for specification purposes. 5.2 This test method is useful in the selection and use of materials in wires, cables, bushings, high-voltage rotating machinery, and other electrical apparatus in which shielding or the distribution of voltage stress is of value. 5.3 Commercially available “moderately conductive” materials frequently are comprised of both conductive and resistive components (that is, cellulose fibers with colloidal carbon black particles attached to portions of the surfaces of those fibers, or discrete conductive particles adhered to the surfaces of electrical insulating polymers). Such commercially available materials are often manufactured in a manner that results in anisotropy of electrical conduction. Hence, the significance of tests using this test method depends upon the orientation of the specimen tested to the direction of the electric field and the relationship between this orientation and the orientation of the material in the electrical apparatus, which uses these materials.