Reading of mV current transformer connected to NI 9206 by cRio chassis

I'm reading a current transformer mV two-wire (+/-) with output between 0.0 - 0.4V.  I have connected to AI0 channel (+) pos and (-) neg to the AI8 channel.  Channel AI0 is set to DIFF, +/-1V.  The pos (+) and (-) neg are also connected each their own 47Kohm resistance that are both connected to COM.   Using a multimeter Fluke 189 I get a read out of the constant the +/-90mV son.   9206, however, returns a float value between +/-150 mV.  Any ideas of what I'm doing wrong so I can get the 9206 to read in the same way as the Fluke?  Any help would be greatly appreciated.


Tags: NI Hardware

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