Siecor 5000 Series - Parameter Setting; Significance of the Additional Parameters; Other Parameters

Operating Instructions 5-5 M90 Fusion Splicer
Issue 02/97 Attenuation Splice
Parameter Setting
The parameter record for the attenuation splice program contains the same parameters
as in program group "Automatic fusion time". Parameters
attenuation, additional time
and lead have been added.
Procedure for
determining the
optimum pa-
rameters
- For initial attempts, use the
default parameters
or the values set out in the
"Parameter Recommendations" section.
- If this does not yield good results, follow the procedure set out in section "Possible
Problems".
- If you still fail to get good results, the following section shows you the effect of
changing the individual parameters.
Significance of
the additional
parameters
Attenuation Setting range 0 to 10 dB: This is the default setting for the required attenuation and is
displayed as the first menu item prior to each splice.
Additional time Setting range 0 to 0.5 s: This value affects the length of the fusion pulses. The default
value is 0.15 s. The value must be increased if the 20 fusion pulses are not sufficient to
attain the required attenuation even though the lead has been set correctly. The value
must be reduced if the attenuation is well below the required value after one or more
fusion pulses. If the additional time is set appropriately, the required attenuation is at-
tained to within an accuracy of approx. 0.1 dB (display value).
Lead Setting range 0 to 100 %: This value determines the attenuation at which the first fusion
phase is terminated. The default value is 30 %. This means that, for example, for a
5-dB splice the target for the first fusion phase is 6.5 dB.
The
value must be increased if the actual attenuation falls below the required value
after the first fusion phase.
The
value must be reduced if the number of fusion pulses required becomes too high or
20 fusion pulses are insufficient to attain the required attenuation.
Other parame-
ters
The other parameters - with the exception of the fusion current - are to be set to the
values determined for a standard splice:
Fusion current The fusion current applies for the first fusion phase and for the fusion pulses. It is gen-
erally set 0.5 mA lower than for a standard splice. The default value is 14.5 mA. If fu-
sion times below 1 s or over 6 s are regularly obtained for the first fusion phase, the
fusion current must be reduced/increased slightly. The
prefusion current
is selected in
exactly the same way as for a standard splice (default value 14.5 mA).
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