IEC 61300-2-5 pdf download

IEC 61300-2-5 pdf download Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 2-5: Tests – Torsion
1 Scope
The purpose of this part of lEC 61300 is to determine the ability of the cable attachment element of the device under test to withstand torsional loads, while under tension, as might beexperienced during installation and normal service.The scope of the test also includes thoseelements designed for ribbon cables.
2Normative references
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies.For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 61300-1，Fibre optic interconnecting devices and passive components – Basic test andmeasurement procedures – Part 1: General guidance
IEC 61300-3-1, Fibre optic interconnecting devices and passive components – Basic test andmeasurement procedures – Part 3-1:Examinations and measurements – Visual examination
IEC 61300-3-3,Fibre optic interconnecting devices and passive components – Basic test andmeasurement procedures – Part 3-3:Examinations and measurements – Active monitoring ofchanges in attenuation and return loss
IEC 61300-3-4, Fibre optic interconnecting devices and passive components – Basic test andmeasurement procedures – Part 3-4:Examinations and measurements – Attenuation
IEC 61300-3-6, Fibre optic interconnecting devices and passive components – Basic test andmeasurement procedures- Part 3-6:Examinations and measurements – Return loss
3General description
The cable-to-device interface, while under a specified tension, is subjected to a torsional loador twisting action to determine the effects of this action on the physical and optical propertiesof the device.
4Apparatus
4.1 General
The test apparatus shall be capable of applying simultaneously both tension and a torsionalload or twisting action to the cable-to-device interface. Figures 1 and 2 show the basic partsof a test apparatus for component and closure test set-ups,respectively.
4.2 Mounting fixture
Use a fixture to rigidly mount the device under test and hold it in proper alignment throughout the test. The fixture shall allow the device under test to be connected to an optical source and detector for monitoring attenuation.
4.3 Cable clamp
The cable clamp is the point at which the torsional load is applied. The cable clamp shall be capable of grasping and securing the cable so that it does not turn or slip in the holder when loads are applied. The clamp shall not crush the optical fibres or cause a change in the attenuation. The cable clamp may consist of a mandrel around which several turns of cable are wrapped and secured.
4.4 Weights
Weights or another mechanism for applying a tensile load to the cable clamp are required. Values of recommended loads are given in Table 1 .