3 LC Hot Melt Fiber Optic Connectors Installation March 2005 78-8135-4385-3-A
Contents 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 Safety and Helpful Hints ................................................................................................................3 Hot Melt Oven Safety Information ................................................................................................3 3M™ LC Expansion 6650-LC Kit Contents ...................................................................................
1.0 Safety and Helpful Hints Use reagent-grade isopropyl alcohol that is 99% pure to clean the fibers and other components. When terminating connectors on any cable containing grease, ensure that all grease is wiped away and the buffer, coating and fiber are thoroughly cleaned with isopropyl alcohol. Isopropyl alcohol is not shipped with the 3M™ Field Termination Kits; however, a bottle for the alcohol is included.
2.0 3M™ LC Expansion 6650-LC Kit Contents A A A A C B D B1 E F I G H A. LC Hot Melt Connector Holder (4) B. LC Polishing Jig Assembly with Weight B1 Spare Polishing Jig C. LC Crimp Tool D. LC Adapter for View Scope E. Heat Shrink Fixture F. Cleaning Pins (3) G. Laminated Strip Template H. Polishing Pads 4.5" × 5.5" I. Lapping Film a. 9 micron silicon carbide 5" diameter (Slate Gray) b. One Step 2 micron AO 5" diameter (Blue/Green) c. 0.5 micron diamond 4.5" × 5.
3.0 3M™ LC Connectors 3.1 The Behind The Wall (BTW) LC is used for simplex 900 micron applications. The connector contains (A) dust cap, (B) connector, and (C) strain relief boot. Note: The BTW LC multimode connector has a beige extender cap at the rear of the connector. The singlemode connector has a blue extender cap at the rear of the connector. A 3.1 B C The duplex 900 micron LC contains (A) dust cap, (B) connector, (C) duplex clip, and (D) strain relief boot.
3.3 The 3.0 mm LC connector contains (A) dust cap, (B) connector, (C) metal strength sheath, (D) metal crimp sleeve, (E) strain relief boot. Note: Multimode simplex yokes are beige and singlemode yokes are blue. A B C D E 4.0 Setup 4.1 Plug in the 120V or 230V power cord. Turn on the 3M™ Hot Melt Oven. The oven requires 6 minutes to warm up (red exposed on switch indicates power on). 4.2 Open the connector package and remove components. 4.
4.4 Insert the connector into the hot melt connector holder. 4.5 Place the load adapter, with slot aligned with handle, into an available port in the oven. IMPORTANT: Do not place connector in a hot load adapter. This may cause adhesive to flow to the outside of the ferrule. Load adapter should be at room temperature when connector is inserted. 4.6 The 3M™ LC Hot Melt Connector should be in the oven for at least 75 seconds. The connector should not be in the oven longer than 5 minutes. 4.
5.0 900 micron Cable Connector Preparation 5.1 Place strain relief boot on cable as shown. 6.0 1.6 – 2.0 mm Jacketed Cable Connector Preparation 6.1 Place the strain relief boot first and then the heat shrink crimp sleeve on the cable as shown. 7.0 3.0 mm Jacketed Cable Connector Preparation 7.1 Place the strain relief boot first and then the metal crimp sleeve on the cable as shown.
8.0 Strip Guide �������������� ������������� ����� ������ 9.0 Stripping Procedure for 900 micron Fiber 9.1 Place the cable on the strip template. Mark buffer at 11 mm. Using the 3M™ Stripping Tool 6365-ST, remove the buffer in small increments until 11 mm of buffer has been removed. 9.2 Using a lint-free cloth moistened with isopropyl alcohol, clean the bare fiber to remove any oils or acrylate coating debris. 9.3 Check the final strip length and adjust if necessary. 10.0 Stripping Procedure for 1.
.2 Snip the aramid yarn to 5-6 mm (approx. 3/16"). 10.3 Flare aramid yarn evenly around buffer. 10.4 Using the 3M™ Stripping Tool 6365-ST, remove the buffer in small increments until 21–22 mm (approx. 7/8") of buffer is left. 10.5 Using a lint-free cloth moistened with isopropyl alcohol, clean the bare fiber to remove any oils or acrylate coating debris. 10.
.0 Stripping Procedure for 3 mm Jacketed Fiber 11.1 Place the jacketed fiber on the strip template and use a fiber marking pen to mark the location of the jacket cut. Using the 3M™ Stripping Tool 6365-ST, remove 33 mm (1 1/3") of jacket off cable. 11.2 Holding the aramid yarn firmly away from the buffer tube, insert the metal strength sheath over the buffer tube and push down until fully inserted into the jacket. Top of sheath should be even with the upper edge of jacket 11.
11.5 Using the 3M™ Stripping Tool 6365-ST, remove the buffer in small increments until 21–22 mm (approx. 7/8") of buffer is left. 11.6 Using a lint-free cloth moistened with isopropyl alcohol, clean the bare fiber to remove any oils or acrylate coating debris. 11.7 Check the final strip lengths and adjust if necessary. 12.0 Connector Mounting 12.1 While connector is still in oven, mount fiber into connector inserting until buffer stops inside the connector.
12.2 Maintaining fiber position in connector, push the jacketed fiber into the cable v-slot feature on the load adapter until secure. 12.3 Attempt to line up the holder arm to keep cable as straight as possible. 12.4 Remove the load adapter from the oven by grasping the cool-touch handle. CAUTION Do not touch the metal portion of the load adapter or connector, as it will be hot! 12.5 Rest the load adapter in one of the available cooling ports located on both sides of the oven.
13.0 Boot Placement for 900 micron Fiber 13.1 Remove connector from the load adapter and slide the boot over connector until fully seated. IMPORTANT: Remove connector gently so that you don’t break the fiber. If connector sticks to the sides of the load adapter when trying to remove, re-heat the connector slightly until connector can be removed from the load adapter. Use the cleaning pin furnished in the kit to scrape the adhesive out of the load adapter hole before proceeding with next connector. 14.
14.3 Using the die labeled “A” with the 3M lettering facing to the left, crimp the metal portion of the sleeve once. Note: Crimp sleeve must be bottomed against connector prior to crimping. The 3M lettered side of the crimp die should be touching the rear of the connector. 14.4 Place the crimp/shrink tube in the shrink fixture assembly and heat for 8 to 10 seconds. Tube should shrink snug around the jacket. Rotate, if needed, to complete shrink. 14.5 Slide boot over crimp/shrink tube.
15.0 Crimping and Boot Placement for 3 mm Jacketed Fiber 15.1 Remove connector from load adapter 15.2 Slide metal crimp sleeve down and over aramid yarn. It should rest over the metal strength sheath as shown. 15.3 Using the LC die labeled “A” with the 3M lettering facing left, crimp the left half of the the crimp ring once making sure that the 3M lettered side of the die is flush with the connector prior to crimping. Note: The crimp ring must be flush against the connector prior to crimping.
15.5 Slide boot over crimp until boot is flush against the connector. Note: Jacketed boots appear the same in the photos but the boots for all 3 types of connectors are different sizes and cannot be interchanged. 16.0 Scribing 16.1 Position the scribe blade so the flat side of the blade is resting on the bead of adhesive and the blade is perpendicular to the fiber. 16.2 Score the fiber by gently sliding the blade across the fiber just above the bead of adhesive.
17.0 Multimode Polish 17.1 Perform an air polish by holding the 9 micron lapping film firmly in one hand and gently moving the film in a circular motion for approximately 10 strokes or until approximately one half of the bead height is removed. Note: You can polish approximately 20 connectors with each piece of 9 micron lapping film. 17.2 Using a lint-free cloth and isopropyl alcohol clean the connector after the air polish to remove all debris left by the 9 micron lapping film. 17.
17.7 Clean the flat side of the polishing jig with a lint-free cloth moistened with isopropyl alcohol. 17.8 Place the polishing jig assembly on the lapping film. 17.9 Place the ferrule in the polishing jig aligning the latch side of the connector with the slot until it stops. Note: The ferrule must be able to slide freely inside the hole in the polishing jig. If not, the ferrule may have adhesive on it which needs to be cleaned off with alcohol and a lintfree cloth. 17.
17.11 Polish 10 figure-eight strokes or until bead of adhesive is no longer visible. Note: Do not hold polishing jig assembly by the weight when polishing. Hold only by the textured polishing adapter. Note: Because bead is 3 to 4 times smaller than classic hot melt connectors you will not feel the bead of adhesive being removed as you polish. IMPORTANT: Make sure that polishing jig stays flat on lapping film at all times 17.12 After bead of adhesive is no longer visible, polish an additional 5 strokes. 17.
17.15 Good Polish (Coaxial light) 17.16 Good Polish (Oblique light) 17.17 Bad Polish – Cut or scratch going through center of core. In this picture half of fiber is missing. 18.0 Singlemode Polish to –40db 18.1 Complete steps17.0 through 17.13 of the multimode polish before proceeding further with the singlemode polish. Note: You may also use steps 18.0 – 18.11 to obtain a cleaner cosmetic multimode polish. 18.
18.3 Place several drops of alcohol on to the rectangular rubber pad. 18.4 Before the alcohol evaporates, place a sheet of the 0.5 micron pale gray diamond lapping film on the polishing pad, shiny side down. 18.5 Clean the lapping film with a lint-free cloth moistened with isopropyl alcohol. Note: The 0.5 micron diamond lapping film can be used for up to 10 connectors. 18.6 Place several drops of distilled water on to the diamond lapping film. 18.7 Insert the connector into the polishing jig assembly. 18.
19.0 Singlemode Polish to –55db Note: Complete steps 17.0 through 17.13 of the multimode polish and 18.0 through 18.11 of the singlemode polish before proceeding further. 19.1 Place several drops of alcohol on to the second gray rectangular rubber pad. 19.2 Before the alcohol evaporates, place a sheet of the white frosted final lapping film on the polishing pad, shiny side down. 19.3 Clean the lapping film with a lint-free cloth moistened with distilled water.
19.8 Leaving polishing jig assembly positioned on the lapping film rotate 180 degrees. Perform 4 additional figure eights. 19.9 Once polishing is complete , refer to steps 17.14 through 17.17 on inspecting the connector with the 200X fiber view scope before proceeding to final step. 20.0 Finishing 20.1 If connector is not to be immediately put into service, install the protective dust cap. 21.0 Installing Duplex Yokes 21.1 Duplex yokes may be mounted after connector has been terminated. 21.
21.3 Taper on the boot will cause the yoke to spread allowing the correct placement at the rear of the connector. 21.4 Pinch the top and bottom of the yoke closed and press together the outer edges of the yoke, snapping firmly into connector. 21.5 A design improvement includes a live hinge on the bottom of the duplex yoke (currently available in multimode). The new duplex yokes will be installed in the same manner as the current yoke, however, the live hinge allows the yoke to be re-opened without damage.
22.0 3M™ Expansion Kit 6650-LC and Replacement Part Numbers 6650-LC LC Expansion Kit (complete) ............................................................................80-6113-1353-9 6650-LH LC Hot Melt Connector Holder (4 ea.) ..............................................................80-6113-1348-9 6650-JW LC Polishing Jig Assembly with Weight (includes 2 pucks) .............................80-6113-1354-7 6650-LT LC Crimp Tool .................................................................
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