px26 pressure transducer amplification with AD620 opamp, calibration techiniques

Discussion in 'General Electronics Chat' started by krishnachaitanya, Mar 5, 2015.

  1. krishnachaitanya

    Thread Starter New Member

    Mar 5, 2015
    3
    0
    Hi,

    I'm new to circuits and electronics have no basic understanding prior to this project, please forgive my ignorance asking these basic questions and help me.
    For my project I have to use a px26 omega differential pressure transducer to find out the pressure in a flow, as you know px26 works in millivolts. I use arduino and matlab to collect data. Arduino cannot detect something in milli volts, hence i have to amplify the sensor output. I have learnt that I could do this using industrial Ad620 op amp.
    So, ,me being new to all this, I'm having problems using the op amp.
    1) Where do i check my amplified voltage is it port 6? Vout?
    2) I'm trying to amplify the voltage from 16 milli volts to about 3.2 volts(something that arduino is comfortable with) so I have used an Rg of 400 ohms. is it correct?
    3) Can someone tell me the calibration procedure for this pressure sensor? I have been to about shunt calibration using a voltage divider as a reference and comparing those values to the opamp+pressure sensor circuit. What values should i compare, this is quite confusing.
    I have to have this amplified voltage fed into the arduino board which connects to matlab simulink .

    I have attached a circuit that I'm trying to understand.

    Thanks & Regards
     
  2. Reloadron

    Active Member

    Jan 15, 2015
    963
    232
    See your replies in the other forum you posted in. Carl gave you the answers to your questions.

    Ron
     
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