Compact Instruments Minivls111 Instrucciones página 3

MiniVLS Instructions - Laser Speed Sensor
Specification
Optical Range:
Fixing method (Threaded):
Fixing method (Plain body):
Supply current:
Pin Connections
Moulded Cable
Pin 1 Brown
Pin 3 Blue
Pin 4 Black
Instructions for use
1. Fix a piece of reflective tape as shown below.
2. The minimum size of the reflective target in the
direction of travel should be twice the size of the light
source image.
3. Arrange the laser speed sensor fixing so the beam is
roughly in the center of the tape.
4. With the laser speed sensor connected, the LED
should light as a signal is received back from the
target. On fast rotating targets the LED will appear to
be on continuously. 4.7k resistor pull-up resistor is
connected internally sensor, no need to connect extra
pull-up resistor externally.
Use Without Reflective Tape.
Under controlled conditions reflective tape may not be required. If there is an existing difference in reflectivity on part
of the object to be monitored then this may be used e.g. keyways and slots in bright shafts, spokes of a wheel, fan
blades etc.
If there is more than one target per revolution of the shaft, then the resulting reading must be divided by the number
of targets to obtain the correct reading. In the case of multiple targets these must be equally spaced around the shaft
or disc or jitter will occur in the measured value, this effect is most apparent at slow speeds.
On bright shafts it is possible to paint a black non-reflective segment and conversely on non-reflective shafts a white
mark can be painted.
Caution
The unit detects contrasts in reflectivity no differences in colour.
As conditions can vary greatly from application to application some experimentation may be required to determine the
best method.
100 - 2000 mm typ.
M20 x 1.5mm thread (bulkhead fixing).
Slotted for bracket mounting.
30mA typ.
Screened Cable
Red
Green
Yellow
LASER RADIATION
DO NOT STARE INTO BEAM
CLASS II LASER PRODUCT
MiniVLS xx1 5V
MiniVLS xx2 8 to 24V
MiniVLS xx3 6 to 12V
Ground
Signal output (NPN, 4.7K pull-up internally)
Tape orientation for use on discs or shafts.
WARNING
Ε Ν
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