IEC 61300-3-28 Ed. 1.0 b:2002

Describes methods to measure fast variation of attenuation due to mechanical stresses. Transient loss measurement shows the effect of fast mechanical disturbances on fibres, such as, dropping, vibration, or manipulation. The duration is generally longer than several tens of milliseconds. This method is not designed to measure very fast transient losses, with duration less than 1 ms.