Siecor 5000 Series - Assessing the Splice and Repeating Fusion; Visual Assessment; Splice Loss Indication with LID; Splice Assessment with Video Programs

Operating Instructions 4-21 M90 Fusion Splicer
Issue 02/97 Splicing
Assessing the Splice and Repeating Fusion
Visual assess-
ment
The cladding glass has a smooth surface if the splice is good. The cores are not visible
on the monitor, however. The bright stripe in the middle of the fiber is the result of the
lens effect of the fiber.
Light stripe
Attenuation:
0,02 dB
Good Splice
Splice loss indi-
cation with LID
Splicing programs with activated LID system display the splice loss in dB in the auto-
matic and fully automatic modes (in the case of single-mode fibers). The accuracy is +/-
0.05 dB for standard single-mode fibers.
Multimode fibers
Accurate measurement of the splice loss is not possible due to the undefined mode
distribution in multimode fibers. Consequently, the display merely indicates whether the
splice loss is ≤0.10 dB or > 0.10 dB.
Splice assess-
ment with video
programs
In the automatic and fully automatic mode the finished splice is analyzed following the
fusion process. The splice point is examined first for enlargements or constrictions as
well as homogeneity. In the event of a fault, the monitor displays "Bad splice, fuse
again?" and the opportunity will be given to repeat the fusion process.
You can repeat fusion by pressing button
.
If the splice appears in order, the splice loss is calculated and displayed in dB. The
splice loss calculation provides accurate results if the following conditions are satisfied:
- The fusion parameters must be correct.
- The fibers used must be of good quality in terms of the eccentricity of the core rela-
tive to the outer contour.
Troubleshooting Section 7 provides examples of poor splices, their possible causes and the relevant
remedies.
Fuse again
"Fuse again" is an aid to parameter optimization and to enhancing the splicing results if
the set fusion time was too short or the fusion current too low.
When button
is pressed, the question "Fuse?" or " Fuse again?" appears on the
display. This allows you to perform repeat fusion, i.e. to re-ignite the arc. The splice loss
achieved is displayed after that.
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