IoT Experiments

DSO138 [2]: Calibration

Jean-Matthieu DECHRISTE -

After assembling the DSO 138 Kit, I had to calibrate the device.

For that, you have to plug the red probe on the square signal connector, on the top of the device.

Set the setting as such:

  • CPL: AC
  • SEN1: 0.1V & SEN2: X5 => 0.5V/div
  • 0.1ms / div

Use a small screwdriver to gently turn the C4 capacitor trimmer.

Do the same with the C5 capacitor trimmer, with the following settings:

  • CPL: AC
  • SEN1: 1V & SEN2: X1 => 1V/div
  • 0.1ms / div

Unfortunately, my first try was not a success. One of the capacitor trimmer was defective, and I had to un-solder it and buy another one to replace it.