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How to connect BNC to fixture

Question asked by andrew257 on Aug 28, 2009
Hi All,

i have a problem with a test setup i am using. I have a diecast box that contains a PCB with the DUT mounted inside it. I am measuring leakage current with a power supply and electrometer.

The problem i have is that the diecast box is being used as a return path for the signal because the BNC sockets are chassis mount. now i have read that it is good to ground the chassis of your fixture to prevent noise pickup etc but i am worried about electric shock since i am using high voltage. Look at the diagram for a better understanding.

Should i be worried about electric shock, and will i see any more noticable noise pickup from using the chassis as part of the return(GND) circuit.

Thank You