I need to perform data acquisition for my RTD (PT 100) temperature sensor. My sensor is first attached to Broderson PXT 10 temperature converter and then to national instruments BNC 2090 - NI DAQ board.
PXT 10 gives 0-10V DC as output, which is then supplied to BNC 2090.
As BNC 2090 reads only voltage, the DAQ gives certain voltage readings. I want to know how can I convert the obtained voltage reading through DAQ into corresponding temperature.
Currently I am using Callendar Van Dussen equation for the conversion. As I am taking a very low exciation current, the conversion gives me resistance values in thousand ohm, and hence I do not get the correct temperature value. I have attached an image for reference.
Can somebody please help?
Thank you.