I have trouble calibrating my recently bought dso nano. The bootlogo shows version number 1.5.20p
I managed to set the zero point to a small value (±2mV), but when I reboot the zero offset is again set to another value.
Here are the steps I did:
Start up the dso nano, while pressing the left button. Pressing play a few seconds, so that it shows the measurement
data. Pressing left/right until I get the Vavg close to zero. Pressing m, and then play for a second.
Then I get “parameter saved”. Then I turn off and on again the dso nano.
But the offset is back to a larger value.
The dso nano is a nice little device, but I hope to be able to calibrate it for accurate results!