Tektronix Technical Forums are maintained by community involvement. Feel free to post questions or respond to questions by other members. Should you require a time-sensitive answer, please contact your local Tektronix support center here.

Ground loop between 6221 and 2182a

Post Reply
mwally
Posts: 1
Joined: February 27th, 2019, 7:33 am
Country: Germany

Ground loop between 6221 and 2182a

Post by mwally » March 10th, 2019, 1:46 pm

Hi all,

I am trying to make a 4-point contact resistance measurement on a nanowire using the 6221 current source and the nanovoltmeter 2182a. I contact first the current source without any problem - the device blinks when the contact tips are in the air and as soon as they land on the sample it stops blinking. However, when making contact with the voltage-measuring tips, the nanowire burns and the current source starts blinking again. I believe it is a ground loop problem. The substrate of the sample is insulating. What would be the 6221's triax inner shield configuration that I need to use? Both hardwares are connected to the same electrical ground of the laboratory through the ground pin of the power cable.

Thanks in advance for any help.

Best.
Mauricio

Post Reply

Return to “Low Voltage Measurements”

Who is online

Users browsing this forum: No registered users and 3 guests