I have a pressure sensor that outputs 0-5v corresponding to 0 - 400 barS (sealed gauge). I connected the sensor as shown in the attached photos and the pressure in that pipe is at 5 bar as shown on the gauge.I took data at 1HZ and I should be getting a pressure reading of 5 bar after scaling. but I have attached a screenshot of the values I obtain during the test. it is at 0bar and just spikes up to >5 bar. It spikes a lot.When the pressure in the pipe was at 0 bar, it still displayed the same type of output.Please help.I have attached the connection with the DAQ as well. Pressure sensor part number: 3100-R-0400S-01-B-0-00. use this to check the data sheet. file 7 is a screenshot of the connection diagram from datasheet. code b voltage mode.

Now, I see the mistake, you need to connect the GND to the DAQ' AI GND as well, not just the signal to DAQ.

Multifunction DAQ

Help with pressure transducer connected to NI USB-6000

Solved!

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Santhosh
Soliton Technologies

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