Noise USB 6211 problem

Hi, I use USB 6211 to measure pressures, but I got too much noise. Please see the attached figure. In order to test if it is the problem of the data acquisition card. I tried to record a 5 V DC from a power supply, and I had V - 2 noise without last coherent. Power supply has been confirmed without problem. I used the DIFF mode. Could someone help this out please? Thank you.


Tags: NI Hardware

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    My analog differential signal (signal DC to DC power supply) is connected to an analog input in box usb-6211 (AI1 and AI9 ports).

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    It might be a good idea to test it with a 9V battery using a differential connection with wiring configuration described in the manual (photo and link below). I know it sounds Basic, but re-seats black connector of i/o to the device might help. Make sure you reference GND AI as well.

    http://www.NI.com/PDF/manuals/371931f.PDF

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    Christian,

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