Microsonic LCA-2 - Manual (Page 37)

Parameter change in the Label-/Splice Sensors esp-4 and esf-1 Page 37 of 51
P ARAMETER CHANGE IN THE L ABEL -/S PLICE S ENSORS ESP -4
AND ESF
-1
Labels are guided through the fork. An ultrasonic transmitter in the lower tine of the fork beams a fast
sequence of pulses through the backing material. The sound pulses cause the backing material to
vibration, so that a greatly attenuated sound save is beamed from the opposite side. The receiver in the
upper tine of the fork receives this sound wave.
The backing material transmits a different signal level from the label. This signal difference is evaluated by
the esf-1. The signal difference between the backing material and the label can be very slight. To ensure
a reliable distinction, the esf-1 must be trained to the label.