MIL-STD-2042-2B(SH)
a. Work a small amount of sealant tape around the optical fibers approximately l9 mm (0.75 inch) from the end of the BOF tube.
b. Place the appropriate tapered tube plug around the optical fibers and sealant tape.
NOTE: The tapered tube plug should be oriented with the tapered end of the plug towards the short piece of BOF tube.
c. Push the short piece of BOF tube over the tapered tube plug until the plug is fully inserted into the short piece of BOF tube.
NOTE: Do not pull slack fiber out of the BOF tube while assembling the plug to the individual fibers and the short piece of BOF tube. If slack fiber is accidentally pulled out of the BOF tube, re-establish the fibers to their original position and continue the procedure.
Step 8 - Using the scissors, trim the flange on the tapered tube plug even with the outer diameter of the short piece of BOF tube.
Step 9 - Slide the short piece of BOF tube with the tapered tube plug into the tube coupler and firmly seat the tube within the tube coupler (see figure 2Fl-2). Apply an axial load of approximately 22 N (5 lbs) between the two BOF tubes to verify that the tube coupler is properly engaged onto the tubes.
NOTE: The optical fibers should now be fixed in the tapered tube plug and should not move into or out of the BOF tube during the furcation unit installation or fiber termination process.
NOTE: When a tee tube coupler is used, the tee connection is end sealed after conduct of the tube sealing integrity test.
Blown optical fiber tube
Tube coupler
Short blown optical fiber tube
Individual fibers
FIGURE 2Fl-2. Short BOF tube and fibers.
Step l0 -When a tee tube connection is used, one of the following optional steps may be performed:
option a. Using the tube cutter, cut a short piece of BOF tubing (length as necessary to allow easy access). Visually verify that the ends
of the tube are cut perpendicular to the tube length. Clean the ends of the short piece of BOF tube with a wipe dampened with alcohol and blow dry as necessary. Slide the short tube into the tee position of the tee tube coupler. Firmly seat the short BOF tube into the tee tube coupler. Apply an axial load of approximately 22 N (5 lbs) between the BOF tube and the tee tube coupler to verify that it is properly engaged into the tube coupler.
option b. Clean a pressure valve assembly with a wipe dampened with alcohol and blow dry as necessary. Slide the pressure valve assembly
into the tee position of the tee tube coupler. Firmly seat the
2Fl-4 METHOD 2Fl
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