IEC TR 62981:2017(E)是一份技术报告，提供了国际练习和比较的结果，重点是了解对晶粒取向电工钢进行的单板测试仪(SST)测量的统计性能。这些实验旨在指定通过单张测试方法测量的强制性参考值，用于高渗透性（P级）晶粒取向（g.-o.）材料的分级，独立于当今实践的Epstein分类。除此之外，还进行了Epstein测试测量，以获得更多最新的统计性能，以便与SST统计特征进行比较。进行了一些实验，旨在提高对SST系统误差性能的了解，即，它们旨在确定SST轭中绝缘分离叠片的质量与测量损耗之间的相关性。

IEC TR 62981:2017(E), which is a Technical Report, provides the results of international exercises and comparisons focusing on achieving the knowledge of the statistical performance of single sheet tester (SST) measurements made on grain-oriented electrical steel. These experiments aim at specifying obligatory reference values, measured by the single sheet test method, for the grading of high permeability (P grades) grain-oriented (g.-o.) materials, independently from the Epstein classification as it is practiced today. Besides this, Epstein test measurements have been made in order to gain more up-to-date statistical performance for comparison with the SST statistical characteristics. A few experiments were carried out aiming at improved knowledge on the systematic error performance of the SST, i.e. they were to determine the correlation between the quality of insulation separating laminations in the SST yokes and the measured loss.