before starting, im trying to measure the output waveform of an inverter. we are near the distribution transformer of our electricity provider, so our ground resistance to earth its just few ohms (ergo im not connecting the ground clip).
i have already done some measurement but with a normal 10x probe, and after a while the trimmer cap happily released the blue smoke
but im threathing everything as directly connected to the mains and im also following the rule of the "pocket", so i was away and nothing dangerous happened.
now i want to do some more measurements, but a bit safer, and because its a one-off and i need it quickly i wonder how safe is to make a hw probe by myself.
even better, because its just 50Hz how bad would it be to add 9 10M resistor in series with a 10X probe? (
so making a 100x probe whitout compensation cap)
i dont need absolute precision, i just want to see what appens at the waveform while i switch off the grid and the inverter kicks in.
thanks for any advice