IEC 60794-1-212:2024定义了当两端固定有电缆元件的光纤电缆经受温度循环时检查衰减行为（衰减变化）的测试程序。该测试评估电缆在无端移动条件下的衰减行为，该条件旨在与例如互连设备或无源组件端接。本文件部分取消并取代IEC 60794-1-22:20 17。本版构成技术修订版。本版本包括以下与IEC 60794-1-22:20 17相关的重大技术变更: a)试验方法的描述改为“两端固定电缆元件”； b)在程序条款中增加了子条款； c)电缆样品和测试装置的制备-up已按逻辑方式排列； d)增加了图1，用于说明电缆样品、DUT和测试设置的制备； e)按照IEC 60794的规定，将温度室温度公差更改为±3°C？1？22，方法F1； f)在温度循环子条款以及最小浸泡时间表和循环程序图中增加了所有要求的步骤，并删除了对IEC 60794-1-22方法F1的引用； g)衰减的最大变化已添加到待指定的细节中； h)增加了新的子条款4.5，用于报告详细信息。

IEC 60794-1-212:2024 defines the test procedure to examine the attenuation behaviour (change in attenuation) when an optical fibre cable with cable elements fixed at both ends is subjected to temperature cycling. This test assesses the attenuation behaviour of a cable under a no-end movement condition intended for termination with, for example, interconnecting devices or passive components. This document partially cancels and replaces IEC 60794-1-22:2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60794-1-22:2017:
a) the description of the test method has been changed to “with cable elements fixed at both ends”;
b) subclauses have been added to the procedure clause;
c) the preparation of cable sample and test set-up has been arranged in a logical way;
d) Figure 1 has been added for illustration of the preparation of cable sample, DUT and test set-up;
e) the temperature chamber temperature tolerance has been changed to ± 3 °C as done in IEC 60794？1？22, method F1;
f) all required steps have been added to the subclause for temperature cycling as well as the table for the minimum soak time and the figure for the cycle procedure, and removed the reference to IEC 60794-1-22, method F1;
g) the maximum change in attenuation has been added to the details to be specified;
h) a new subclause 4.5 has been added for details to be reported.