Hi, i have an oscilloscope, Hantek DSO 5072P i have recently bought it, and i-am trying to measure the output from a transformer.
I have made the transformer for a project. I have 4 outputs: 6V(8A), 13V(3A), 17V(3A), 25V(3A), volts are measured with the multi-meter and are according to my design calculations. In the secondary between each layer of wire is a layer of paper and electric tape, excepting the primary because there are to many turns and layers... there is no short circuit between coils.
When is use a multi-meter to measure the Volts, everything is ok, even with very cheap chinese multi-meter.
When i use the oscilloscope, well... i attach some screenshots to see what is showing.
I have made a Self-Calibration on the oscilloscope, and the test signal shows ok (there is also a screenshot attached). I have measured some other signals from some PWM devices and they are ok. i have measured direct current and is ok...
So what is happening?
Thank you.
The screenshot are in order: 25 volt, 6 volt, 13 volt, and test signal
Later Edit: if i change the coupling from DC to AC the voltage shows even higher.