Operating Instructions 7-11 M90 Fusion Splicer
Issue 02/97 Troubleshooting and Care/Maintenance
Fault Appearance Cause Remedy
Splice appear-
ance
Enlargement
Feed too large Reduce in steps of 1 µm
Not fused through Fusion current too
small
Increase in steps of 0.2 to 0.3 mA
Prefusion time too short Standard value: 0.25 s, change only
in exceptional cases. Increase in
steps of 0.05 s
Seeds or inclusions Dirty end faces before
splicing
Clean end faces before fusion! If
necessary, increase cleaning current
by 0.2 - 0.3 mA or increase cleaning
time by 0.1 s
Bad cleavage Check cleavage quality before fu-
sion
Fusion current too high Reduce prefusion and main fusion
currents
Prefusion time/current
too low
Increase prefusion time in steps of
0.1 s
Match-stick heads Electrodes dirty, arc
burns irregularly
Clean electrodes
Fusion current is much
too high
Reduce in steps of 0.5 to 1.0 mA
Prefusion time is much
too long
Set guide value of 0.25
Prefusion current is
much too high
Set guide value of 14.5 mA
Feed is too small Increase feed in steps of 1 µm
Separation too large Reduce separation in steps of 1 µm
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