Feedback 12-304 and 12-305 not work I0 but in ELVIS protobard work!

[N1ckfm]

Hi all, I have a Feedback product, 12-304 and 12-305 this board when I put in NI ELVIS II and I want use the analog output I0 in the osciloscope give me 200mv for example when in reality is 3Vp-p but en I1 to I7 this work normal so I thought that problem is the port I0, but when I put the board of ELVIS (protoboard) and use the I0, this work normal! only the problem is the I0 when I use 12-304 and 12-305 or in Feedback product is a part of specification not work I0?, I hope some help for this, thanks.

[PSJr.]

Hello,

This ouput "l0" that you refer, it's a output from ELVIS protoboard or of the Feedback product?
I think this is a problem with this line in the Feedback products.

Sincerely,

[N1ckfm]

Hi, I found the answer  some days ago, the feedfack has  a resistence in the ch 0, 100ohm, so the voltage is different because the resistence is used for measurement of current.