Recently, i am working on a project of using AD7793 with Arduino mini pro as accuracy temperature measurement,
I am using 4-wire PT1000 , 5.1k ohms (use multimeter measure 5.237k ohms) as ref resistance.
AD7793 set ( Continuous read , Gain 4 , bipolar, external reference, current 210uA, update rate 4.17Hz . )
The Arduino code and Matlab data acquisition code are posed as follow.
But i get weird "discontinuous" output signal, seems it get different offset when the temperature rise or fall .
please help me out.
Thanks a lot
Arduino code :
Matlab code :