FFS2000 Series Chapter 9: Proof Test (Item #s FFS2000PT and FFS2000WS)
Page 56 TTN047338-D02
Chapter 9 Proof Test (Item #s FFS2000PT and FFS2000WS)
The proof testing station of the FFS2000PT or FFS2000WS can be used to determine the breaking strength of a
fiber or to ensure that a fusion spliced fiber meets a minimum strength requirement. The section of fiber to be
tested is located between two mandrels. The ends of the fibers are wrapped once around each mandrel and held
in place by an integral clamping mechanism. A load is automatically applied to the fiber by the rotation of one of
the mandrels. The load can be taken up to a predetermined level and released (proof test) or it can be taken up to
the breaking strength of the fiber (tension test). The tension level is displayed on the monitor as a bar graph which
can be configured to display the tension in units of pounds, kilograms, kpsi, newtons or GPa.
9.1. Setting Up
It is important to check the following items before beginning the proof test.
Fiber Diameter
In order for the proof test station to calculate the tensile stress applied to the fiber under test, the diameter of the
fiber must be entered. To access the Proof Test Configuration popup window, select Configuration Proof
Tester from the Menu Bar. If a fiber diameter other than the one displayed is desired, enter the new value in
microns.
Units
Check the units selection displayed in the Proof Test Configuration popup window, Select the desired units: kpsi,
lb, kg, N, or GPa.
Timeout
Limits the length of the proof test. This is necessary in case the fiber breaks before reaching the peak tension
level. The proof test mechanism will reset after the chosen timeout period. If the fiber strength exceeds the proof
test peak, the proof test mechanism will automatically reset before the chosen timeout period has expired. Check
the timeout value displayed in the Proof Test Configuration popup window. If a timeout value other than that
displayed is desired, enter the new timeout in seconds. Allowable values are 0 - 20 seconds. A default setting of
10 seconds will be used if either an out-of-range value or no value is entered.
Peak
This is the level to which the proof test will be performed. Check the selected value displayed in the Proof Test
Configuration popup window. If a peak level other than that displayed is desired, enter a peak level in the current
units.
9.2. Proof Testing
9.2.1. Loading the Fiber
Position the fiber so that the splice region or portion of fiber to be tested is centered between the mandrels. Press
and hold the button on top of one mandrel to release its clamp. Wrap the fiber around the mandrel twice,
centering it on the rubber grips. Make sure the wrapped fiber is not overlapped. Release the button on top of the
mandrel, securing the fiber end under the clamp. Repeat with the other mandrel. The fiber should be taut (no
slack) between the mandrels.
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