Splicing Procedure

Splicing Set-up

The splicing area should be clean, dry and well-lighted. A clean, well organized splicing area will improve splicing efficiency and minimize the risk of contamination of fibers or splices

Open the buffer tubes, expose and clean the fibers per company practice

Remove Fibrlok splice from protective package. Load the splice into the assembly tool by pressing firmly at the ends of the splice

If using the Fibrlok 2501 Assembly Tool, rotate the toggle arms for the appropriate fiber size. Inward – 250 µm Outward – 900 µm

Fiber Preparation

Remove the minimum length of fiber required to prepare and splice the fibers – 1″ to 2″ (depending on cleaver)

Strip approximately 1 to 2 inches (2.5 to 5 cm) of plastic coating from the fiber using a mechanical stripper. Clean the bare glass by pulling the fiber through an alchohol soaked lint-free wipe. This will remove any fragments or dirt remaining on the fiber

Cleave fiber to the length indicated below:

Fibrlok Splice Designation Cleave Length for End of Splice with Black Plug & Symbol Cleave Length for End of Splice with White Plug & Symbol
3M Fibrlok 2525 (250 µm x 250 µm) 12.5 mm ± 0.5 mm (.492 in. ± .020 in.)
3M Fibrlok 2590 (250 µm x 900 µm) 12.5 mm ± 0.5 mm (.492 in. ± .020 in.) 14.0 mm ± 0.5 mm (.551 in ± .020 in.)
3M Fibrlok 2599 (900 µm x 900 µm) 14.0 mm ± 0.5 mm (.551 in ± .020 in.)

Check the cleave length using the cleave length gauge on the Fibrlok Assembly Tool. Adjust the cleaver to provide the prescribed cleave lengths. Check cleave lengths periodically during subsequent splicing operations. Do not allow cleaved end to contact tool

Splice Assembling

Push the fiber down into the fiber retention pad on the proper side of the splice

Grasp the coated fiber about .25 inches (6 mm) from the bare glass and move the fiber end onto the fiber alignment guide on the Assembly Tool such that the end is resting on the alignment guide outside of the splice

Gently continue pushing the fiber into the splice until resistance is felt. When fully inserted, the first fiber should be straight or have a slight bow – up to .1 inch (3 mm)

Lay fiber into foam retention pad and begin to insert the fiber end into the splice

Gently push the second fiber in small increments straight through the alignment guide into the fiber entry port. As the coating of the second fiber enters the fiber entry port, watch for the bow in the first fiber to increase. This occurs when the end face of the second fiber contacts the first fiber and pushes the first fiber slightly back out of the splice. Continue gently pushing the second fiber until it meets resistance. Following proper insertion, the second fiber will be approximately straight but may have up to a .1 inch (3 mm) maximum bow. At this point, the first fiber will have a larger bow than the second fiber and larger than it had initially

Push the first fiber back against the second fiber until there are equal bows in both fibers

Pivot the handle of the Fibrlok Assembly Tool down until it contacts the cap of the Fibrlok Splice. Squeeze the handle of the assembly tool as shown in order to close cap and actuate the splice. When possible, secure the tool to a work surface for added support. A snap sound will be heard when the splice is actuated

Remove the Fibrlok Splice from the Assembly Tool by first removing the fibers from the foam retention pads and then lifting the splice from the splice holding cradle