If the Oscilloscope has a Counter option you can use it, If not it is a problem because measuring the Waveform on the screen is not accurate.Yes, Power On and Off for several times to make sure that the Oscillator is working properly in the Temperature range.Please send me your report/Results so I can add it to my approval report. Is there any progress regarding the Coating of the Control board in the power supply?I understand that we stop the production on your side until this issue will be solve.Is it possible to make sure that the coating thickness will be at least 100um? (30um is too thin, the Manual Coating is way thicker and it seems better).Please tell me which method you used coating the Sample power supplies that you will send me. (Manual or automatic)