CN0326 measurement error


I using kit CN0326 measurement pH and temperature connect SMT32f407. I using code reference CN0326

I measurement it with voltage if supple DC Powe Supply KEYSIGHT E3632A, range 0 - 1170mV , result very well. channel 1( measurement Voltage,) channel 2(mes PT1000).

However i connect sensor pH Atlas or Hanna HI8424 result not stability, 

Please hepl me.

Thank you .

Parents Reply Children