Sensor Adjustment - Velleman PEM300D Mode D'emploi

6. Alignment
a. Sensor Adjustment
1. Take the covers off both units.
2. Look into one of the transmitter's viewfinders (the 4 holes between the 2 sensors, figure p.1, #8).
3. Adjust the angle of the sensor block horizontally (figure p.1, bracket #9) and vertically (figure p.1, screw #7) until
you can clearly see the receiver in the viewfinder.
4. Repeat steps 2 and 3 with the receiver, looking for the transmitter.
5. Put the covers back on the units.
b. Laser Adjustment
WARNING: never look directly into the laser beam!
1. Take the covers off both units.
2. Switch on the receiver's laser (figure p.1, switch #11 ; beam #10). A red dot will indicate where the beam is aimed.
3. Aim the receiver's sensor block so the red dot is centred on the transmitter.
4. Turn the receiver's laser off.
5. Switch on the transmitter's laser (figure p.1, #11 and #10). A red dot will show where it is aimed at.
6. Adjust the angle of the sensor block horizontally and vertically (figure p.1, #9 and #7) until the red dot is centred
on the receiver and both the receiver's LEDs (figure p.1, #2 and 3) go out.
You may have to adjust the angle of the receiver's sensor block a little as well.
7. Turn the transmitter's laser off.
8. Put the covers back on the units.
c. Fine-Tuning the Receiver
1. Take the cover off the receiver.
2. The units can be fine tuned using a volt-ohm meter (VOM).
3. Set the range of the VOM to 0~10V DC.
4. Measure the voltage over the + and - measuring points (figure p.1, #4) on the receiver.
5. Adjust the angle of the sensor block until the VOM measures the highest voltage.
2.5 to 5V is OK, 5 to 8V is best.
6. Put the cover back on the receiver.
d. Delay Time
1. Take the cover off the receiver.
2. Adjust the delay time with the knob on the receiver (figure p.1 #5).
Objects passing faster than the selected delay time will not be detected.
A delay time of 50ms corresponds to someone running by at full speed.
A delay time of 700ms corresponds to someone walking by.
3. Put the cover back on the receiver.
After you've finished tuning and adjusting the units, put the covers back on and fix them with the bottom screw.
PEM300D 3 VELLEMAN