Optical cable torsion test

The optical cable torsion test can test the ability of the optical cable to withstand mechanical torsion. The primary purpose is to measure the attenuation change of the optical fiber when the optical cable is subjected to external torsional force. The second purpose is to evaluate the possibility of physical damage due to such stress.
Zhongke Testing Reliability Experiment Center has the mechanical properties of various optical cables and provides professional torsion test services for optical cables.

1. According to different transmission performance, distance and purpose, optical cables can be divided into user optical cables, local optical cables, long-distance optical cables and submarine optical cables.
2. According to the different conditions of transmission conductors and media, optical cables can be divided into metal-free optical cables, ordinary optical cables, and comprehensive optical cables (mainly used for railway dedicated network communication lines).
3. According to different laying methods, optical cables can be divided into pipeline optical cables, direct buried optical cables, aerial optical cables and underwater optical cables.
4. According to different structural methods, optical cables can be divided into flat structure optical cables, layered optical cables, skeleton optical cables, armored optical cables and high-density user optical cables.

Rotate the removable fiber optic cable clamp as follows:
1) Rotate 180° or 90° clockwise;
2) Return to the starting position;
3) Rotate 180° or 90° counterclockwise;
4) Return to the starting position. These four parts rotate to form a cycle. Each cycle can be completed within 1 minute at most, for a total of 10 cycles. The sample can be allowed to stand for at least 5 minutes before measuring the acceptance parameters. If necessary, the specimen may be removed from the equipment and visually inspected for appearance using normal vision.

GB/T 7424.21-2021 General Specification for Optical Cables Part 21: Basic Test Methods for Optical Cables Mechanical Performance Test Methods
IEC 60794-1-21: 2020 General Specification for Optical Cables Part 21: Basic Test Methods for Optical Cables Mechanical Performance Test Method
BS EN IEC 60794-1-2-2021 Optical fiber cables Part 1-2: General specifications Basic optical cable test procedures General rules
DS/EN IEC 60794-2-21-2021 General Specification for Optical Cables Part 21: Basic Test Methods for Optical Cables Mechanical Performance Test Method
LST EN 60794-1-21-2015 Optical cables Part 1-21: General specifications Basic test procedures for optical cables Mechanical test method
DIN EN 60794-1-21-2021 Optical fiber cables Part 1-21: General specifications Basic optical cable test procedures Mechanical test method
KS C IEC 60794-1-1-2007 Optical cables Part 1-1: General specifications General
GB/T 7424.2-2008 General specification for optical cables Part 2: Basic test methods for optical cables