3M 250/900 User Manual

78-0013-6978-0-B

250 µm fi ber

2.6 Close the funnel door and bow start door on the fiber

holder. Again ensure that the guide funnel is pushed
completely forward to the end of the fiber holder.
Pull the fiber back until the fiber tip is flush with
the end of the funnel. To verify the cleave length is
still correct, all coatings should align with the hole
located in the funnel. Close the back clamp.

Note: for semi-tight buffer fi ber, the 250 µm coating
may protrude up to 1 mm past the 900 µm buffer. If
necessary, re-strip, clean and cleave the fi ber to meet
length requirements.

Fiber coatings

2.7 Place fiber holder in assembly base and slowly slide

fiber holder forward, toward the connector.

Note: Allow 10 seconds for this movement from the
time the fi ber begins to enter the boot on the connec-
tor until the fi ber holder bottoms out in the assembly
base.

10 seconds or a rate of 3 mm/sec

Guide funnel door opened by
cam on the assembly base

Fiber bow should start when the white line on
fiber holder aligns with the “BOW START”
mark on the assembly base

2.8 While slowly sliding the fiber holder toward the

connector, a bow should start to form in the fiber
when the white line on the fiber holder aligns with
the white BOW START line on the assembly base.
If a bow is not seen, slide the fiber holder back. If
a bow is not seen, or if a bow is seen before the
two white lines meet, slide the fiber holder back.
Re-strip, clean and cleave the fiber, and begin the
termination process again.

Fiber bow

Release lever

Guide funnel stops when
ear contacts release lever

No gap between fiber
holder and actuation
when fully inserted

2.9 Continue to slowly slide fiber holder towards

connector until it stops. Verify fiber bow again.

Note: The fi ber will bow and lift the middle cover
for rigid fi bers and remain closed for 250 µm and
especially ﬂ exible 900 µm fi bers. This ensures proper
fi ber insertion force.

Guide funnel

Place fiber tip here

Hole