I am having issues with setting up my MPX2010DP pressure transducer. I have it hooked up to a pitot tube, which takes pressure measurements from inside of a duct. The transducer output is wired to an NI 9215 +/- 10V analog input module. This module records the data, and this data is processed using a Labview VI that I wrote.
The transducer has 4 pins. 1: Ground, 2: V+out, 3: Vsupply (I'm using 12 volts from a power supply), 4: V-out. The V+out and V-out are wired to the NI 9215 analog input module. The pin 1 ground is wired to the COM of the 9215 module which is wired to the power supply ground. the Vsupply is wired to the 12V power supply.
Problem) I can't seem to get the setup right. Whether it be wiring, proper supply voltage, or something. Using a voltmeter, I seemed to get voltages that didn't correspond to any pressure fluctuations; it was acting as a voltage divider.
Solution) The output range of the transducer is 0-25mV. Does this call for signal conditioning or amplification? Use an op-amp that has a gain of 400 so I can achieve a 10V output range?
Question) What am I doing wrong? I thought I would simply supply a voltage and read the outputs with an analog input, but it has turned out to be difficult. Am I over-analyzing my issue?