IEC 61300-3-28:2012描述了测量光纤和无源光学元件在使用寿命期间由于机械应力而引起的衰减快速变化的方法。该方法不适用于测量可能影响传输系统性能的极快瞬态损耗（持续时间小于1ms）。它经过优化，可检测因部件性能标准中规定的试验而产生的机械应力引起的瞬态损耗，其持续时间通常超过几十毫秒。本文件前一版的变更旨在更新试验方法并重新考虑要求。 关键词:瞬时损耗

IEC 61300-3-28:2012 describes methods to measure fast variation of attenuation due to mechanical stresses applied on optical fibres and passive optical components during their lifetime. This method is not designed to measure very fast transient losses (with duration less than 1 ms) that could affect the performance of transmission systems. It is optimised to detect transient losses caused by mechanical stresses due to the tests prescribed in the component performance standards, whose duration is generally longer than several tens of milliseconds. Changes from the previous edition of the document are to update the test method and to reconsider the requirements. Keywords: Transient loss