Yeap, that should be the case but I contacted with the NI supplier and tomorrow they are going to give me separate cd with pid toolkit.
The first scaling is the calibration equation to convert the voltage to the pressure difference. The second one is the flow rate equation that is in the attachment as screenshot_1. Sorry, I am going to check all those things tomorrow because I am out of the lab right now. 😞
Ok, when you get back to the lab, I recommend you do the following:
1) Put down this VI for a second and make a simple one that delivers a user-specified voltage to the system:
2) Go back to this Vi,
Hopefully, that will give you a solution.
Just checking: You're making sure that your "set point" and "numeric" are in the same unit? Both these inputs should be your flow rate while output should be voltage
Thank you very much for the great help :). I will do tomorrow as you suggested, I will check all of them. Yes you are right set point and numeric should be in the same unit but the output should be voltage.