Hello everybody !
I'm follwing CN0359 circuit in oder to measure conductivity of water.
I have some problem with this circuit:
1) My system always return 130.45 C degree when i don't connect PT1000 to J3. Seem, this temperature value is R13 (1.5KR) inside CN0359.
2) When my system operating, both AD8253ARMZ(U15-A and U18-A) ICs very hot(Whitout Conductivity cell).
Please give me some suggestions !
Thanks all !