DS-TACHO-4
TECHNICAL REFERENCE MANUAL
4.3. Adjustment of the probes
Operational mode of the sensor can be seen at the end of the optical fibre by a light beam (not
dangerous), which is emitted when the sensor is in “1” mode and not emitted when the sensor is in “0”
mode. The sensor keeps its wavelength in near Infra-Red to ensure power and immunity of the
detection function. This also gives an indication about the condition of the optical fibre.
The sensor should be placed about 2 to 5mm above the tape. A sensitivity potentiometer is available to
adjust the trigger level for reliable pulse output.
First turn the potentiometer in mid position. Bring the probe closer to the target until the indicator at
the head lights up, targeting the white mark. Shift the probe, and repeat this operation in order to
detect the triggering limits on the black marks of the target. Set up the probe in an average position
(length), review this operation to confirm the accurate detection: the set up is finished.
Image 8: Probe adjustment
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