Information on the most widely used ASTM standards within the materials testing industry
Model: UTOF35-WB, IEC 60794-1-21 Method E11: Bend Test
UTOF35-WB Optical Fiber Warp Bending Testing Machine is suitable for testing the ability of optical cables or optical cable components to withstand winding around a mandrel. By applying repeated winding forces, qualified optical cables are required to ensure that the fibers do not break, the change in fiber attenuation does not exceed the values specified in the detailed product specifications of the optical cable, and the cable sheath does not crack. Compliant with IEC 60794-1-E11A.
General introduction
UTOF35-WB Optical Fiber Warp Bending Testing Machine is suitable for testing the ability of optical cables or optical cable components to withstand winding around a mandrel. By applying repeated winding forces, qualified optical cables are required to ensure that the fibers do not break, the change in fiber attenuation does not exceed the values specified in the detailed product specifications of the optical cable, and the cable sheath does not crack. Compliant with IEC 60794-1-E11A.
Test Procedure 1 – Test method E11 A (standard test procedure)
The sample shall be wrapped in a close helix around the mandrel at a uniform rate. Sufficient tension shall be applied to ensure that the sample contours the mandrel. The sample shall then be unwrapped.
The intent of test method E11 A is to specify the test using the apparatus in Figure, that is, the total number of coils in the helix. Either apparatus may be used for testing per test method E11 A.

Acceptance criteria:
The acceptance criteria for the test shall be as stated in the detail specification. Typical failure modes include loss of optical continuity, degradation of optical transmittance or physical damage to the cable.
Key Features
This testing machine uses computer control, servo motor drive, and precision ball screw transmission for loading, with measurement via a precision load sensor signal. It features smooth loading, accurate measurement, rapid control response, and various control modes, allowing for convenient and precise digital calibration of load and elongation. It also includes full-load protection and position protection.
IEC 60794-1-21 Optical fibre cables - Part 1-21: Generic specification - Basic optical cable test procedures - Mechanical tests methods
IEC 60794-1-21 Method E11: Bend Test
EN 60794-1 Optical fibre cables - Part 1: Generic specification - Basic optical cable test procedures
GB/T 7424.21: Optical fibre cable generic specification - Part 21:Basic optical cable test procedures- Mechanical test methods
Main technical specification
| Driving wheel diameter | 200mm, 300mm, 400mm |
| Driven wheel | diameter 300mm, adjustable travel range: 250mm |
| Winding speed | 1-10 cycles per minute |
| Number of winding turns | 2–10, freely set. One cycle consists of n turns forward and n turns backward, where n is the set number of turns |
| Number of windings | 1–9999, freely set |
| Weight | 150kg |
| Can start tests independently as a stand-alone machine, automatically records the number of windings, and stops automatically after the test ends | |
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