- Sun Jan 30, 2011 8:29 pm
#118804
Circuit “ground” in most cases is NOT the same as mains / protective Earth. Not sure what's happening in your case , but as I said I have never seen a scope that didn't bond the ground clips to mains earth...
fll-freak wrote:...But if I do this with my elderly Lecroy, the ground clip drags the V/2 reference to ground. (The V/2 being created from a voltage divider). And I get sparks if I clip to the 5 volt rail. And yet, I have never experienced these issues with much more newer and expensive scopes at work. If all scopes tie the probe tips to ground, then I am at a loss to understand how this could have worked.If the circuit you’re measuring has no connection to main / protective Earth, then you should be able to clip the ground clip of the scope probe anywhere you like without issue.
Circuit “ground” in most cases is NOT the same as mains / protective Earth. Not sure what's happening in your case , but as I said I have never seen a scope that didn't bond the ground clips to mains earth...