IEC 60793-1-51:2014提供了一种在规定环境中评估光纤性能的实用方法。本标准的目的是确定光纤亚类A1a至A1d多模光纤以及B类和C类单模光纤在实际使用、储存和/或运输中可能出现的高温（干热）环境条件下的适用性。该测试主要旨在允许在给定时间段内观察高温的影响。根据IEC 60068-2-2测试Bd进行该程序。第二版取消并取代了2001年出版的第一版，构成了技术修订。与上一版相比，此版本包括以下重大技术变更: -使含量与相关纤维类型的截面规格相协调；-将文件的适用性扩展到C类单模光纤。 关键词:光纤亚类A1a至A1d多模光纤、B类和C类单模光纤、高温（干热）

IEC 60793-1-51:2014 provides a practical method for evaluating fibre performance in a defined environment. The purpose of this standard is to determine the suitability of optical fibre sub-category A1a to A1d multimode fibres and class B and C single-mode fibres to withstand the environmental condition of high temperature (dry heat) which may occur in actual use, storage and/or transport. The test is primarily intended to permit the observation of effects of high temperature over a given period. This procedure is conducted in accordance with IEC 60068-2-2, Test Bd. This second edition cancels and replaces the first edition, published in 2001, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- harmonizing the content with sectional specifications of relevant fibre types;
- extending the applicability of the document to class C single-mode fibres. Keywords: optical fibre sub-category A1a to A1d multimode fibres, class B and C single-mode fibres, high temperature (dry heat)