Calibration not working for me

Products & Technology DSO Quad
4

Hi HugMan,

thank you for your response. I describe what I am doing for channel A:

  1. I enter calibration, let it calibrate ZERO and Diff and after that I provide it with 250mV. It displays +.232V in the VOLTAGE column. With -…+ I adjust it to 250mv.
  2. I am going to the nex line, 0.1V: provide 0.51V, -> +.508V
  3. for 0.2V: 1.0V -> +1.00V
  4. 0.5V: 2.70V -> +2.70V
  5. 1V: 5.15V -> +5.16V
  6. 2V: 10.37V -> +10.4V
  7. 5V: 25.4V -> +25.4V
  8. 10V: I do not have 50-60V, so I adjust to the same 25.4V from step 7.: 10V: 25.4V -> +25.6V (25.4 wasn’t an option)
  9. I choose Exit AND SAVE CALIBRATION RESULTS
  10. Save the current Settings
  11. changing the voltage to 5.6V, DSO Quad shows Vpp: +6.40V and Vdc +6.40V -> That’s wrong
  12. Power Off and back on
  13. Still the same Input: 5.6V, DSO says 6.40
  14. 10.36 in, DSO says: 11.2V
  15. 1.40V in, DSO says: 2.20V

That’s the procedure I did very often and always the calibration fails.

Best regards
Wolfgang