Ok, am a relatively rusty automation technician since i changed trade like 20y ago. I dont really understand alot of the tech stuff i read in a another tread relating to this subject of if i should use ground or not, but here is the thing.
I have just bought used this analog LEADER LBO 524 Oscilloscope and when i measure every bit of metal on the chassis including the groundpart of the BNC connectors against the earthwire on the mainslead on the scope, there is infinite resistance. No conn whatsoever. I opened it up and everything looks untouched. So looking at this video below i dont understand whats going on. My scope is a 230V one and its delivered and bought in Norway where i live. Is it correct what i measure? Also it looks like that there is danger in using mains earthed instruments too according to this video.