1.1 本规程描述了使用电磁（涡流）方法分选有色金属的程序。该程序适用于使用绝对或比较器型线圈的仪器，用于区分质量、形状、电导率和其他变量（如合金、热处理或硬度）的变化，这些变量可能与材料的电性能密切相关。还描述了用于评估分拣可行性和建立标准的样本选择。 1.2 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。 1.3 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 绝对法和比较法提供了一种根据成分或条件或两者对大量有色金属零件或库存进行排序的方法。 5.2 当需要高灵敏度检查时，使用比较法或双线圈法。这种方法的优点是几乎完全抑制干扰。 5.3 圆满完成此类分离的能力取决于有色金属零件的电气特性与其物理条件的关系。 5.4 这些方法可用于全自动装置中的高速分拣，其中检查速度可能接近每秒许多样本，具体取决于其大小和形状。 5.5 有色金属材料的成功分选主要取决于样本中存在的变量以及频率和填充因子的正确选择。 5.6 在测量期间，测试线圈磁场和被测零件之间的耦合将极大地影响排序的精度。

1.1 This practice describes a procedure for sorting nonferrous metals using the electromagnetic (eddy current) method. The procedure is intended for use with instruments using absolute or comparator-type coils for distinguishing variations in mass, shape, conductivity, and other variables such as alloy, heat treatment, or hardness that may be closely correlated with the electrical properties of the material. Selection of samples to evaluate sorting feasibility and to establish standards is also described. 1.2 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. 1.3 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 Absolute and comparative methods provide a measure for sorting large quantities of nonferrous parts or stock with regard to composition or condition, or both. 5.2 The comparative or two-coil method is used when high-sensitivity examination is required. The advantage of this method is that it almost completely suppresses interferences. 5.3 The ability to accomplish these types of separations satisfactorily is dependent upon the relation of the electric characteristics of the nonferrous parts to their physical condition. 5.4 These methods may be used for high-speed sorting in a fully automated setup where the speed of examination may approach many specimens per second depending on their size and shape. 5.5 Successful sorting of nonferrous material depends mainly on the variables present in the sample and the proper selection of frequency and fill factor. 5.6 The accuracy of a sort will be affected greatly by the coupling between the test coil field and the examined part during the measuring period.