08-17-2015 07:02 AM
Hi All,
I'm looking to perform some low current measurements on my DUT and therefore am looking at including the Guard wires on my DUT evaluation PCB. I have two related questions on this issue.
1: The pinout of my 4141 says that there are two guard pins and I have verifed this with a DMM, they are connected together and drive at the same level as the Channel HI. However the recommended cable DB25F-DB25F Low leakage cable only has one of these guard pins connected through. Is this correct or is there an error with my cable? I have checked all 4 channels and they are the same.
2: Does anyone know of any good information / best practices for the guard tracking on my PCB?
Thanks all,
Nick
08-18-2015 01:43 AM
Question now moved to a more appropriate board:-
http://forums.ni.com/t5/Digital-Multimeters-DMMs-and/SMU-Guard-connections/td-p/3179600
Nick