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Two-Point Bend Tester

Brand:Fiber SigmaModel:TP-2

The 2- point bend test is an extremely convenient techn ique for determining the strength and fatigue pa rameters of fibers in general and high strength& nbsp;optical fibers and ribbons in particular. First& nbsp;described by Murgatroyd  [ref. 1], the technique is now used extensively& nbsp;in the optical fiber industry. Reference 2  contains a detailed description and evaluation of&nbs p;the method. 2- point bending can rapidly generate large quantities&n bsp;of data for routine strength and fatigue mea surements and for evaluating various polymer coatings .

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The 2-point bend test involves placing a loop of fiber bent through 180° between two faceplates. The faceplates are grooved to locate the fiber in position. The faceplates are then brought together by a computer controlled stepper motor translation stage. An acoustic detection circuit halts the stepper motor when the fiber breaks. The computer software then calculates the strength from the faceplate separation at failure. The system includes:

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stepper motor controlled translation stage and controller.

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bending hardware for mounting on the translation stage. Includes mounting plates and single grooved faceplates for holding a 250 µm coating diameter polymer coated fiber.

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digital interface designed for connection to the parallel printer port of an IBM PC, PS/2 or compatible. Does not require an expansion slot if the computer's existing printer port is used.

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computer interface unit also contains a digital position readout, manual motor control and acoustic break detector with acoustic transducer.

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software for complete control of the system from an IBM PC or compatible.

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miscellaneous software utilities for statistical analysis of results and data presentation.

bullet all necessary cables and connectors.

The control software is extremely powerful featuring:

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strength measurement under conditions of constant faceplate velocity, constant strain rate or constant stress rate. (Only the constant faceplate velocity mode is available with 2POINT Direct.)

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incorporates a corrections for the non-linear fiber elastic modulus.

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a static fatigue mode in which the time to failure is determined as a function of the faceplate separation (ref. 3).

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reports strain and stress, faceplate speed, strain rate and stress rate at failure and time to failure and all other key experimental parameters.

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fully configurable by the user both from configuration files and by menus - configurable parameters include fiber dimensions and elastic properties, faceplate gap for loading fiber, speed parameters, screen menu colors etc. etc.

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guaranteed to meet all requirements of current standards (TIA/EIA, IEC, Bellcore/Telcordia, etc.).

Click here for a full description of the 2POINT for Windows control program.