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34972A Data aquisition Device and a 3 wrire RTD

Question asked by towens on Sep 6, 2013
Latest reply on Sep 9, 2013 by tomc
I am have trouble understanding how to connect a 3 wire RTD to my 34972A data logger.  I have read:

http://digital.ni.com/public.nsf/allkb/5BFB36CFCC32C662862570D5006DC0C0
http://www.home.agilent.com/agilent/editorial.jspx?cc=CA&lc=eng&ckey=853226&nid=-33257.922596&id=853226


I do not quite follow how these type of wiring is accomplished.

I have the 34902A and 34901A cards.  I am confused about the EX ports

Are the EX+ and EX- terminals the COMM port on the acquisition card?  or are they a second AN+ and AN- port?

When I get this wired do I use a 2 wire RTD setting on the SW?

Could someone sketch a quick wiring diagram for me (preferably with ports labelled as they are on my card)?

Thanks,  

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