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fluctuating signal with usb 6212

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fluctuating signal with usb 6212

‎12-31-2017 11:08 PM

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I am using NI USB DAQ 6212 for measuring the pressure value from MPX2010GP. The output of the sensor is the differential one varies upto 30mv. For supply voltage to the sensor, I am using the 11.2 V battery.

 

I am getting the noise at the output. But when i am measuring it with multimeter its showing a voltage with no noise. I tried connecting only the differential input and also with connecting the AI- with AI gnd. But no improvement in the signal.

 

Looking forward for suggestions to stabilize the sensor output in labview.

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Accepted by topic author kashifsherwani

Re: fluctuating signal with usb 6212

‎01-01-2018 05:41 AM

DMMs tend to have a lot of filtering, so they will not show noise.  Try using an oscilloscope to verify the noise.


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