Maker Pro
Maker Pro

Connect ground

René Gothe

Feb 7, 2018
3
Joined
Feb 7, 2018
Messages
3
Hi there!
Right now, I work with my Picoscope, PC and transformer.
Combined with my picoscope, I have two probes with a "ground cable" attached to each probe.

I´m about to meassure the drop voltage on 3 electronic items, and the idea in order to not frie my Pico is to connect the item
and my transformer at the same time in a common output.
So that was my task.
But I´m not sure where I can connect my ground from the probe?
Kind of a crucial connection to avoid potential damages, so it has to be right, and therefore I choose to ask you guys here.
 

Minder

Apr 24, 2015
3,478
Joined
Apr 24, 2015
Messages
3,478
If any part is connected to a PC input without any form of isolation, the input will be referenced to earth ground in any case.
The normal practice for 'scope type of equipment is to ensure the AC supply is isolated, as the 'scope lead common is normally connected to earth ground.
This is a practice when working on equipment that has no galvanic isolation from the AC mains supply.
You would need to determine if the pico probe commons are isolated from earth ground.
M.
 

René Gothe

Feb 7, 2018
3
Joined
Feb 7, 2018
Messages
3
Good point about the earth ground, but my pico probe commons are infact isolated from earth ground.
 

Minder

Apr 24, 2015
3,478
Joined
Apr 24, 2015
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3,478
Then quite possibly there is no concern.
M.
 
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