Grounding Loop @ AI measurement

[Grey]

Hi,

I have a project where the DUT's input supply ground and measurement (DUT's output) signal ground is same.

I decided to use RSE measurement method.

a brief diagram is shown in the attached pic.

worrying about ground loop and anybody let me know is this diagram is safe to implement?

I planned to use PCIe6320.

Any suggestion about implementation of optical isolation here? ]

thanks.

[Espelkamper]

Hi Grey,

Assume that on the 230V supply side it is protective earth rather than ground.

Got in mind that inside the computer the "AI GROUND" is connected to protective earth.

You have to make sure that your DC power supply is completely isolated from mains, including protective earth.

When there are no other connections (i. e. surprises) you can go ahead.

Regards,

Espelkamper

[Grey]

Hi Espelkamper,

In my attached Image..Assume,if the 230V power supply is an Isolation transformer...is that one help??