M90 Fusion Splicer 4-20 Operating Instructions
Splicing Issue 02/97
Positioning
The following measurements are performed during the positioning process:
- Detection of interfering light
- Assessment of end face quality
- Detection of end angle
Detecting inter-
fering light
Interfering light will cause positioning and measuring errors in the LID programs. It is
produced by interference between the LID transmit signal and signals from external
devices (e.g. active OTDR)
If interfering light is detected, "Attention interfering light!" is displayed on the monitor
and the current operation is stopped. Switch off the source of the interfering light.
Reselect the sequence that has been halted by pressing button
.
Start the selected sequence by pressing button
.
Assessing
the end face
quality
This measurement is performed in all programs if the fibers are fused in fully automatic,
automatic or semi-automatic modes.
If the video system detects dirt or end angle errors totalling in excess of 2.3°, the mes-
sage "fiber dirty or bad end faces" appears.
Fiber end faces which are poorly prepared will yield high splice losses and incorrect
splice loss evaluation.
Detecting the
end angle
In the case of single-mode fibers in LID programs, the splicer detects fiber end angle
errors that are overall > 2°. The monitor then displays "Bad endfaces".
If one of these fault messages appears, you should then prepare the faulty end face
again.
If you press button
instead, you will instruct splicing to continue. This is indicated by
the attenuation indicator flashing. The displayed splice loss may be incorrect.
Fusion using End Face Preparation with low-cost
Cleavers
Generally, it is also possible to operate the splicer using low-cost cleavers to prepare
the end faces.
All programs can be employed. The inaccuracy in the attenuation display can generally
be expected to be greater in such cases. In the case of the "Attenuation-splice" pro-
gram, this may be
additionally
accompanied by increased inaccuracy in the attenua-
tion actually attained. If "Bad endfaces" is displayed on the monitor, press button
to
continue the fusion process. The splice loss displayed after fusion may have a much
greater error. This is indicated by the display flashing. In such cases, measure the
splice point with an external test set to determine the exact splice loss.
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