Leuze GSX14E, Руководство пользователя

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ALC (Auto Level Control) function
With the ALC function, the sensor automatically corrects the switching threshold in
such a way that the maximum function reserve is always available during opera-
tion.
NOTICE
The ALC function is active by default and is indicated by illumination of
the yellow ALC LED.
In each teach event, the current signal values in the sensor are digitally deter-
mined. This results in the optimum switching threshold being calculated for maxi-
mum function reserve.
All values are saved and are non-volatile, retaining their validity as long as the dy-
namic parameters of the system remain unchanged and the material is not
changed.
Signal changes can result each time the roll is changed, even with labels that are
apparently the same.
– This is caused, for example, by material variations which affect the acoustic
impedance of the ultrasonic system (material thickness, homogeneity, etc.)
or the optical system (transmission factor, homogeneity).
– In addition, changes to the dynamic system parameters (tape tension, mid-
dle position of the labels, jitter, etc.) could have a negative effect on the func-
tion reserve of the sensor.
With the ALC function, the sensor automatically corrects the switching threshold in
such a way that the maximum function reserve is always available during opera-
tion - the sensor works absolutely reliably and free of errors.
The teach event only needs to be repeated if the sensor does not switch following
a change of material.
NOTICE
When changing to another type of label, a new adjustment must gener-
ally be carried out by teaching it.
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EN