Klaus said:The safest way would be connecting the scope to the mains via a 1:1 isolation transformer.
JimB said:Disconnecting the earth (ground) from the mains supply to the scope is a BAD idea, infact it is dangerous.
Nigel Goodwin said:This is common practice in the service trade, not only by engineers, but also by large multi-national electronics companies.
Nigel Goodwin said:'Cifrocco' has already found one of the dangers in an earthed scope, and has survived a possibly fatal situation.
Oznog said:The ground is there for your safety because any point you hook the probe ground to goes to the metal case.
"As I've already made clear, it all depends on your point of view!.
Your right hand on the earthed scope, and your left hand on a live wire is EXTREMELY dangerous - if the scope isn't grounded that danger is removed."
awright said:Perhaps the solution to his problem is to correctly locate the ground of his test object, not to create a dangerous situation by making his 'scope chassis capable of being connected to hot test points without blowing a fuse.
awright said:While I agree that lifting the ground on instruments is a dangerous practice, I think the discussion has gotten a little off the trail here.
Cifrocco said he blew the power supply's fuse twice by connecting his 'scope's ground lead to what he THOUGHT were ground points in his test object. Perhaps the solution to his problem is to correctly locate the ground of his test object, not to create a dangerous situation by making his 'scope chassis capable of being connected to hot test points without blowing a fuse.
awright said:While I agree that lifting the ground on instruments is a dangerous practice, I think the discussion has gotten a little off the trail here.
Cifrocco said he blew the power supply's fuse twice by connecting his 'scope's ground lead to what he THOUGHT were ground points in his test object. Perhaps the solution to his problem is to correctly locate the ground of his test object, not to create a dangerous situation by making his 'scope chassis capable of being connected to hot test points without blowing a fuse.
awright
Cifrocco said:Not sure if it is best to connect the power supply circuit through an isolation transformer or try to use the X and Y channels of my scope, having never attempted either before.
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