IEC 61753-131-03:20 21包含机械光纤接头需要满足的最低测试、测试严重性和测量要求，以便被归类为满足IEC 61753-1中定义的OP类（室外保护）环境中使用的单模光纤接头的要求。本机械接头文件定义了在一组规定条件下标准光学性能的要求。该标准包含一系列或一组测试和测量，明确规定了条件、严重性和通过/失败标准。该系列测试通常被称为操作服务环境或性能类别，旨在作为证明产品满足特定应用、市场部门或用户组要求的能力的基础。本第一版取消并取代2010年发布的IEC 61753-131-3第一版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: a)增加定义； b)增加IEC 60068-2-10霉菌生长测试和材料的测试严重性； c)用IEC 61753取代IEC 61753 1:20 07 U类试验和试验严重性？1:20 18类别OP测试； d)增加尺寸符合IEC 61756-1的要求； e)增加弯矩试验； f)冷态试验中低温的变化和温度试验向？25°C。如果需要40°C，用户可以参考OP+类别。

IEC 61753-131-03:2021 contains the minimum tests, test severities and measurement requirements which a mechanical fibre splice need to satisfy in order to be categorised as meeting the requirements of single-mode fibre splice for use in category OP (Outdoor protected) environments, as defined in IEC 61753-1. This document for mechanical splices defines the requirements for standard optical performance under a set of specified conditions. The standard contains a series or a set of tests and measurements with clearly stated conditions, severities and pass/fail criteria. The series of tests, commonly referred to as an operating service environment or performance category, is intended to be a basis to prove the product’s ability to satisfy the requirements of a specific application, market sector or user group. This first edition cancels and replaces IEC 61753-131-3 first edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) addition of definitions;
b) addition of IEC 60068-2-10 mould growth test and test severities for materials;
c) replacement of the IEC 61753 1:2007 category U tests and test severities by the IEC 61753？1:2018 category OP tests;
d) addition of the requirement that dimensions are in accordance with IEC 61756-1;
e) addition of the bending moment test;
f) change of low temperature in cold test and change of temperature test to？25°C. If 40°C is required, the user can refer to category OP+.