Nonlinear scale problem

Hello. I'm changing to the input of an amplifier that I thought was linear, but it is not. I have a 0 - 5V signals from NI DAQ (USB-6002) card that is driving an amplifier 0-200V. This amplifier has what is "Blood pressure monitor" port BNC labeled on the front of the amplifier. In addition, on the front of the amplifier is a label that reads "10mV/1V. These are the raw numbers of LabVIEW:

1V = 0.20V

2V = 0.58

3V = 0.96V

4 = 1.35v and

5 = 1.73V.

I need to put this on the scale so that:

1V = 40V

2V = 80.6V

3V = 120 V

4V = 161V and

5 V = 201.4V

Thank you for your help.

Well, given your data, here's how to change the values after the polynomial coefficients. (you can remove the rest of the code after playing with polynomial order, etc.).

Tags: NI Software

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