pressure sensor calibration in labview

[sgirgin]

Hi all,

I have a problem in calibration of pressure sensor.In attachment i am sending the data-sheet of the sensor and the block diagram i made.I used linear fit to calibrate.y axis range:0-100 bar x axis range:0-10VDC

Are there more accurate solutions existing?

Regards,

[RavensFan]

That linear fit being in there makes the VI more complicated than it needs to be.  Since 0-10V equals 0-100 psi, it is simple enough to just multiple the DAQ read by 10 and your done.

Back to your other thread, now that you've told us that the sensor outputs 0-10V, that means you have the right DAQ card, but using Pressure(Bridge) in the DAQ assistant was just wrong.  You would have used analog input.  You can set a custom scale in there to convert 0-10V to 0-100 psi.

At the end of the day, your current VI is better because you are using the real DAQmx VI's rather than the DAQ assistant.

[sgirgin]

Yes, i did not create a block diagram using DAQ assist if you have a look on vi because of the reason you said.So you say use constant 10 and multiply it instead of linear fit?

[RavensFan]

You could use DAQ Assistant.  You'd just have to pick the correct input.  Analog Input is right.  Pressure (bridge) is wrong.

Yes, just multiply by 10.  You don't need linear fit.

[sgirgin]

Ok, you said 0-10V equals 0-100 psi.So in order to convert psi to bar i have one more multiplication?