Velleman projects EDU09 Assembly instructions - Manual (Page 12)

- 12 -
Calibration & assembly
III. CALIBRATION
There is no external driver necessary, the EDU09 uses the internal Microsoft Windows HID driver,
these will loaded automatic.
• Set RV1 to the middle position.
• Connect the EDU09 oscilloscope to the USB slot of the PC. The red led should light.
• Run the installed software EDU09.EXE
• If it is connected for the first time, calibration procedure will start automatically.
• If it does not start automatically: In the Options menu select “Calibrate” and then click OK to
start the calibration. Wait until calibration is successful.
Advanced calibration:
Fine tuning of the input amplifier circuit (requires a 1.5V battery)
This calibration is not really necessary, you must only do this, if you want a higher precision of your
measurements
• In the ‘Options’-menu select “Expert Settings”.
• In the ‘View’-menu select “Waveform Parameters...”.
• In the ‘Waveform Parameters’-window select the check box “DC Mean”.
Bolts
(4x)
Nuts
(4x)
Distance bolts
(4x)
IV. ASSEMBLY
Your scope is now ready for use.
Caps
(4x)
25mm M3 Bolt
15mm
M4 spacer
black cap
M3 nut
black cap
Mount the cover.
+ 1.5V
+ -
+
-
• Measure the output of the battery with a multi-
meter and remember it.
• Connect the battery to the oscilloscope’s input.
• Set Volts/Div. to “0.5V” and click the “Run”
button.
• Adjust trimmer RV1 until the displayed “DC
Mean” value in the ‘Waveform Parameters’-
window corresponds with the measured value.
• Remove battery.