1.1 本指南描述了使用电导测量方法定位暴露或覆盖的防水膜泄漏的标准程序。 1.2 本指南解决了对用于测试和验证防水膜完整性的当前方法和程序进行一般技术描述的需求。 1.3 本指南不旨在取代目视、红外线或其他检查方法。如有规定，应将其与其他屋顶检查方法结合使用。 1.4 本指南建议对所用的泄漏定位设备、程序和调查参数进行校准，以满足既定的最低泄漏检测灵敏度。泄漏检测灵敏度校准应根据制造商的建议定期进行验证。 1.5 泄漏位置调查可用于安装在屋顶、广场甲板、水池、水景、有盖水库和其他防水应用中的防水膜。 1.6 该程序适用于由聚乙烯、聚丙烯、聚氯乙烯、沥青材料和其他电绝缘材料制成的膜。 1.7 本指南提供了使用电导定位薄膜缺口的设备和方法的一般说明。有关本指南中所述设备的正确操作和使用，请参阅制造商的说明。 1.8 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。 1.9 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 在安装过程中以及安装后未能尽快纠正膜缺陷，可能会导致膜过早失效。问题包括设计缺陷、膜系统的错误应用以及后续交易造成的损坏。 4. 在植被屋顶、隔热层、磨耗层或顶板等覆盖层下采用防水膜的屋顶设计大大加剧了泄漏定位问题。 4.2 本指南介绍了使用电导测试定位防水膜缺口的方法。 5. 所述方法包括测试程序，旨在提供膜装置施工质量控制的一部分。 4.3 本指南中描述的方法也可用于现有防水膜的完整性或取证测试；具体限制适用。 4.4 本指南中所述的电导方法要求在膜下使用导电基底作为测试电流的接地回路。在屋顶组件中，薄膜安装在电绝缘材料上，如绝缘泡沫或保护板，或两者兼而有之，通往任何导电甲板的电路径都会中断。这种情况可以通过将导电材料直接放置在膜下面来补救。导电材料为测试电流提供了返回路径。

1.1 This guide describes standard procedures for using electrical conductance measurement methods to locate leaks in exposed or covered waterproof membranes. 1.2 This guide addresses the need for a general technical description of the current methods and procedures that are used to test and verify the integrity of waterproof membranes. 1.3 This guide is not intended to replace visual, infrared, or other methods of inspection. It is to be used in conjunction with other methods of roof inspection when specified. 1.4 This guide recommends that the leak location equipment, procedures, and survey parameters used are calibrated to meet established minimum leak detection sensitivity. The leak detection sensitivity calibration should be verified on a regular basis according to the manufacturer’s recommendations. 1.5 Leak location surveys can be used on waterproofing membranes installed in roofs, plaza decks, pools, water features, covered reservoirs, and other waterproofing applications. 1.6 The procedures are applicable for membranes made of materials such as polyethylene, polypropylene, polyvinyl chloride, bituminous material, and other electrically insulating materials. 1.7 This guide provides a general description of the equipment and methods for locating membrane breaches using electric conductance. Refer to the manufacturer’s instructions for the proper operation and use of the equipment described in this guide. 1.8 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. 1.9 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 ====== 4.1 The failure to correct membrane defects during and as soon as possible after its installation can cause premature failure of the membrane. Problems include design deficiencies, faulty application of the membrane system, and damage by subsequent trades. 4 Roof designs incorporating a waterproof membrane under overburden such as a vegetative roof, insulation layer, wear-course, or topping slab greatly exacerbate the problem of leak locating. 4.2 This guide describes methods for using electric conductance testing to locate breaches in waterproof membranes. 5 The methods described include testing procedures designed to provide a part of the construction quality control of membrane installations. 4.3 The methods described in this guide may also be used for integrity or forensic testing of existing waterproof membranes; specific limitations apply. 4.4 The electric conductance methods described in this guide require a conductive substrate under the membrane to serve as a ground return path for the test currents. In roof assemblies where the membrane is installed over electric insulating material such as insulating foam or a protection board, or both, the electric path to any conductive deck is interrupted. The situation can be remedied by placing a conductive material directly under the membrane. The conductive material provides the return path for the test currents.