™
Fibrlok II 2529
Universal Optical Fiber Splice
Instructions
January 1994
Issue 1, 34-7035-4458-4
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1.0 General
™
1.01
The 3M brand Fibrlok II 2529 Universal Optical Fiber Splice provides permanent mechanical splices for
™
single- or multimode fiber having 125 m diameter cladding. The Fibrlok II 2529 Universal Splice is
designed to accommodate any combination of fibers with coating diameters from 250 m to 900 m.
™
1.02
All Fibrlok II 2529 Universal Optical Fiber Splices are gray in
Cap
™
color and are marked with the 3M Fibrlok II logo on the splice
cap.
End Plug
(each end)
1.50" (38.1 mm)
0.250"
(6.4 mm)
.150"
(3.8 mm)
Jacket
Fiber Entry Port
(each end)
™
1.03
Fibrlok 2501 Assembly Tool
Pivoted Handle
(shown open)
Splice Holding
Cradle
Fiber Alignment
Guides (2)
Fiber Retention
Pad
Toggle Arm
Toggle Arm
Fiber Retention
Pad
Finger Cutout
Instruction Label
(2)
Base
Fiber Cleave
Length Gauge (both
ends of tool)
Mounting Holes
(4)
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1.04
Tools and Materials Required are as follows:
1.05
Some Compatible Organizers are:
• 3M 2118, 3M 2524, 3M 2672
• AT&T UC-SS/M1
• GTE Part 910470 0000, 910470 1000
• Siecor M67-070
• Keptel LightLink
• Fibrlok™ 2500 or 2501 Assembly Tool
• Plastic Coating (Buffer) Stripper
• Reagent Grade Isopropyl Alcohol
• Lint-free Wipes
• Cleaver
• Fibrlok 2505 Assembly Tool
Mounting Adaptor (optional)
Others compatible with minor modifications:
™
• DiTel UST 3000, UST 3010, UST 3500
• AT&T 846 280 626, 846 280 634,
846 280 642, 846 280 659
• Fibrlok II Video Instruction Tape (optional)
• Tool Kit (optional)
• Raychem FOSC 100/TK
2.0 Splicing Set-Up
2.01
The splicing area should be clean, dry and well-lighted.
A clean, well-organized splicing area will improve splice
efficiency and minimize the risk of contamination of fibers or
splices.
2.02
Open the buffer tubes, expose and clean the fibers per your
company practice.
Note:
Storage, use and disposal of isopropyl alcohol should be
per your company health, safety and environmental
instructions. Refer to solvent label or Material Safety
Data Sheet.
2.03
See Section 6.0 for recommended procedures for fiber
organization and splice storage.
2.04
Remove Fibrlok splice from protective package. Load the
splice into the assembly tool by pressing firmly at the ends of
the splice.
Note:
Carefully follow health, safety and environmental
information on Fibrlok II Splice label or Material Safety
Data Sheet.
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2.05
If using the Fibrlok 2501 Assembly Tool, rotate the toggle
arms for the appropriate fiber size.
Inward – 250
m
Outward – 900
m
3.0 Fiber Preparation
3.01
Remove the minimum length of fiber required to prepare and
splice the fibers.
1" to 2" (25 mm - 51 mm)
(depending on cleaver)
3.02
Strip approximately 1 to 2 inches (25 mm to 51 mm) of
plastic coating from the fiber using a mechanical stripper.
Note:
The stripper should be in good operating condition to
prevent scratches or other damage to the glass cladding.
3.03
Clean the bare glass by pulling the fiber through an alcohol
soaked lint-free wipe. This will remove any fragments or dirt
remaining on the fiber.
Note:
Note:
Do not wipe the fibers more than two times, and limit the
time that the bare fiber is exposed to the atmosphere.
Carefully follow health, safety and environmental
information on container label or Material Data Sheet for
isopropyl alcohol being used.
3.04
Cleave fiber to 12.5 mm ≠0.5 mm (0.492 ≠0.020 inches).
™
Important: The Fibrlok II 2529 Universal Splice uses a cleave length of
12.5 mm ≠0.5 mm (0.492 ≠0.020 inches) for both 250 m and
900 m coated fibers.
Note:
The cleaver should be in good operating condition and used
in accordance with the manufacturer's instructions. It is
recommended that the cleaver provide a consistent cleave-
to-coating length within ≠0.5 mm. In addition, standard
cleavers should produce cleaved ends within 2≠of
perpendicular and free of major defects. Cleavers
specifically designed to produce controlled, angled cleaves
of greater than 2≠may also be used with the Fibrlok™ II
Optical Splice.
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3.05
Check the cleave length using the 12.5 mm cleave length
gauges on the Fibrlok Assembly Tool. Adjust the cleaver to
provide the prescribed cleave lengths. Check cleave lengths
periodically during subsequent splicing operations.
Note:
Do not allow cleaved end to contact tool. Do not clean
the fibers again after they have been cleaved.
250 µm 900 µm
250 µm : 12.5 mm
900 µm : 14.0 mm
900 µm : 12.5 mm
4.0 Splice Assembly
4.01
Push the fiber down into the fiber retention pad on the proper
side of the splice.
Note:
Hold the coated portion of the fiber ONLY. Do not allow
the cleaved end to contact any surface before insertion
into the splice.
4.02
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.
Note:
Note:
When splicing 250 m to 900 m coated fiber, always
insert the 250 m coated fiber first.
Fiber should be placed in the retention pad and inserted
into the splice immediately following cleaning to
minimize exposure to the atmosphere and reduce the risk
of contamination.
Note:
Push fiber straight into fiber alignment guide,
NOT AT AN ANGLE.
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4.03
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).
Note:
If properly inserted, bare glass should not be visible
outside of splice. If bare glass is visible, pull back slightly
on fiber and continue insertion until resistance is met.
Never fully remove fibers from splice after initial
insertion. Do not pull on fiber after it has been properly
inserted.
4.04
4.05
Prepare second fiber (strip, clean and cleave) as described in
Section 3.
Lay fiber into foam retention pad and begin to insert the fiber
end into the splice, as in 4.01 and 4.02.
4.06
4.07
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.
4.08
Push the first fiber back against the second fiber until there
are equal bows in both fibers.
Note:
Do not pull on either of the fibers following
establishment of the bows in the first and second fibers.
The fiber ends must be held together by the compressive
forces induced by the bows to produce a low loss splice.
If fiber bows are NOT observed to move as described,
repeat steps 4.02 – 4.07 of Splice Assembly but DO NOT
fully remove fibers from the splice. If bow movement is
still not observed, remove fibers, strip, clean and re-
cleave, checking for proper cleave length. Re-splice per
splicing procedure using a new splice.
Do not attempt to "tune" or optimize the splice as this
may result in higher splice loss. The Fibrlok™ II Splice is
not designed to be "tuned." Fiber alignment does not
occur until the splice is activated.
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4.09
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.
4.10
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.
Note:
In the event a splice must be refabricated, simply cut the
fibers at each end of the splice (this will remove 1-1/2" of
fiber from the loop) and re-splice per instructions. Splice
fabrication will require a new splice and a length of 2
inches on each fiber.
DO NOT REMOVE FIBERS AND RE-USE FIBRLOK SPLICES.
5.0 Fiber Repositioning
5.01
If high loss is observed after splice has been actuated, it is
possible that the fiber ends are separated. In this case, lift the
splice cap and reposition fiber ends, as instructed below.
NOTE: DO NOT COMPLETELY REMOVE FIBERS FROM
FIBRLOK SPLICES.
5.02
While the splice is in the splice holding cradle, insert the short
prongs of the Fibrlok II Splice Cap Lifter into the two holes
on the side of the splice. The cap lifter will be at an angle to
the splice. The long prongs will be resting against the top of
the splice cap.
5.03
Slide the bottom of the cap lifter inward until it is in a vertical
position, lifting the splice slightly out of the cradle.
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5.04
5.05
Hold the cap lifter in place with one hand and push down on
the ends of the splice with the other hand. This action should
reseat the splice into the holding cradle and lift the cap at the
same time.
Repeat fiber centering and splice actuation (See step 4.06 –
4.09.) If after two attempts an acceptable splice loss is not
obtained, remove fiber, strip, clean and re-cleave. Re-splice
using a new splice.
6.0 Fiber Organization and Splice Storage
6.01
When storing fiber slack in a splice tray, the spliced fiber ends
will twist one full turn for each full loop of fiber being stored.
This rotation places stress on the fibers. This rotational stress
makes fiber organization more difficult and may affect fiber/
splice performance, particularly in 900 m coated fibers. The
stiffness of the 900 m fiber does not distribute this stress in
the same manner as 250 m coated fiber. The following
procedure is strongly recommended when splicing 900 m
coated fibers and will improve fiber organization when
splicing all fiber types.
6.02
6.03
Secure the buffer tubes of the fibers to be spliced to the tray
so that the fibers are free to rotate through the point of
attachment.
Select the first two fibers to be spliced and lay them into the
tray. Trim the fibers so they are the right length for splicing
plus approximately 1 to 2 inches (2.5 to 5 cm) for fiber end
preparation.
6.04
Place the splice assembly tool close to or on top of the splice
tray. Match the orientation of the tool to that of the splice
holder or tray whenever possible.
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6.05
6.06
6.07
Remove the minimum amount of fiber required for fiber
preparation and splicing. Remove less than one loop if
possible.
Prepare fibers and complete splice as described in Section 3
and 4.
Carefully lay the splice on top of the holder without securing
the splice into the holder.
6.08
For 250 to 250 m and 900 to 900 m splices:
a. Store the shorter of the two fibers in the tray.
b. Observe how the splice lays in its relaxed state. Rotate the
splice through the smallest possible angle to install it in the
tray.
c. Store the second fiber.
6.09
For 250 to 900 m splices:
a. Store the 900 m fiber first.
b. Grasping the splice by the 900 m fiber, observe how the
splice lays in its relaxed state. Rotate the splice through
the smallest possible angle to install it in the tray.
c. Store the 250 m fiber.
10
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7.0 Splicing Accessories
7.01
The 3M Fibrlok™ 2524 Splice Organizer Tray holds up to 24
Fibrlok Splices and provides superior fiber and splice
organization. Easily installed, the tray will accommodate up
to eight buffer tubes holding up to 48 fibers (250 m or 900
m coated fibers) and can be adapted for fusion splice
storage.
7.02
7.03
The 2524 Splice Tray fits and mounts into the 3M 2177 Fiber
Optic Splice Closure, the 3M 2178 Fiber Optic Splice Case
and the 3M 2190 PST Fiber Optic Splice Closure. It is also
compatible with a variety of non-3M closures.
The 3M Fibrlok™ 2505 Assembly Tool Mounting Adapter
permits mounting of the Fibrlok Assembly Tool on standard
3M MS2™ Splicing Rigs, conventional camera-type tripods,
and other standard telco splicing rig components. The 2505
Mounting Adapter provides the ability to mount the Fibrlok
Assembly Tool on a variety of surfaces, and in any
orientation, for splicing in difficult locations such as
manholes, aerial splice points, pedestals and distribution
frames.
7.04
3M Fiber Preparation Kits provide all the tools necessary for
the assembly of the Fibrlok Splice. Fiber Splice Preparation
Kits are available in a variety of combinations with or without
the Fibrlok Assembly Tool and/or cleaving tool.
Fiber Splice Preparation Kits:
3M Stock Number
#2530 Kit with all components listed below and Thomas & Betts Cleave Tool ..................... 80-6104-5390-6
#2531 Kit with all components listed below............................................................................ 80-6104-5317-9
#2533 Kit with all components listed below excluding Fibrlok Assembly Tool..................... 80-6104-5319-5
Splice Kits Components Listing (available separately)
Fibrlok 2501 Assembly Tool .................................................................................................... 80-6105-8187-0
Cable Strippers ......................................................................................................................... 80-6104-4314-7
Cleaning Alcohol Bottle ........................................................................................................... 80-6104-4329-5
Scissors ..................................................................................................................................... 80-6104-4754-4
No-Nik Stripper (.008) ............................................................................................................. 80-6104-4808-8
Micro Stripper (.006)................................................................................................................ 80-6105-7250-7
Lint Free Cloth (100/pkg.) ....................................................................................................... 80-6104-4324-6
Magnifier, Cleaved Fiber Inspection........................................................................................ 80-6104-4799-9
Coaxial Cable Stripper ............................................................................................................. 78-8073-7415-8
Instruction Manual ................................................................................................................... 78-6900-1905-0
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Important Notice
All statements, technical information and recommendations related to the Seller's products are based on information believed to be
reliable, but the accuracy or completeness thereof is not guaranteed. Before utilizing the product, the user should determine the suitability
of the product for its intended use. The user assumes all risks and liability whatsoever in connection with such use.
Any statements or recommendations of the Seller which are not contained in the Seller's current publications shall have no force or effect
unless contained in an agreement signed by an authorized officer of the Seller. The statements contained herein are made in lieu of all
warranties, express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose
which warranties are hereby expressly disclaimed.
SELLER SHALL NOT BE LIABLE TO THE USER OR ANY OTHER PERSON UNDER ANY LEGAL THEORY, INCLUDING BUT NOT
LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY INJURY OR FOR ANY DIRECT OR CONSEQUENTIAL DAMAGES
SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY OF THE SELLER'S PRODUCTS THAT WERE DEFECTIVE.
Telecom Systems Division
6801 River Place Blvd.
Austin, TX 78726-9000
800/426-8688
Printed in USA
© 3M 1994 34-7035-4458-4
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