Hi, my name is Claudio. I would like to ask a question about an issue that i'm facing while trying to acquire acceleration datas of a vibrating object using an NI 9234. Considering that the acceleration datas refer to a vibrating object I expected to acquire some positive and negative datas with a mean value close to 0. Instead the datas that I'm acquiring are all positive and with a mean value that is pretty far from 0. I tried acquiring those same datas on Matlab, and it gave the expected results. Now what I don't understand is if this is a code issue or something that has to do with the hardware I'm using. I thank you in advance for your answers.

Have you tried using NI MAX to set up your accelerometer channel? If you can get that to work, you just need to recreate the channel setup in LabVIEW. For an IEPE accelerometer, you usually have to set the excitation source to be Internal and the excitation value to be either 2.1 or 4 mA (check what your accelerometer requires). I don't think that DC coupling is correct because the IEPE power supply imposes a DC offset. https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000x0VRCAY&l=en-GB