This equipment is used to determine the ability of optical fiber cable to withstand mechanical twisting. This machine is specially designed in accordance with IEC-60794-1-2-E7.

Application: The length of the specimen under torsion should be sufficient to permit the appropriate clamping and twisting, and long enough to sustain the applied torsion. A typical value for

small cables 1m, whereas larger cable samples are usually defined in terms of the cable diameter. A common length is 125 times the cable diameter. Armored cables may require a longer cable sample or a smaller number of torsion cycles.

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