01-14-2008 03:07 AM
01-15-2008 04:02 PM
Hi AhGang,
I wanted to ask a few questions to get a full understanding of the question so that I can give better answer.
What do you mean by guard signal?
What card are you using to measure the 10UA?
01-18-2008 12:21 AM
01-21-2008 10:40 AM
Hi AhGang,
I believe the best thing for you would be to use 6-wire resistance measurements. National Instruments does produce a guard card that allows for this type of measurement. There is a great NI Developer Zone Article called “Improve Resistance Measurements with 6-wire Technique” that I would like you to take a look at. Our guard cards can be easily paired with our Digital Multi-meters (DMM). If you would like to do switching to measure several different signals with the guard card and DMM then just check the switch card specifications to ensure that the switch you are interested is sufficient for your application. My suggestion to you is to call a technical representative to get assistance with purchasing your system. They can help to ensure that the hardware specs are sufficient for your system and that the hardware works well together. Please visit www.ni.com/contact to speak to a technical sales representative to help select the correct hardware for your application.
I hope this helps!