Dear All,
              I constructed a PIC ORP(Oxidation Reduction Potential) interface using the help of Mr.Marcel Du Champ from this list. I am facing a problem with signal noise. The LCD display is showing a value close to 200mV when I dip it in a solution of potential of 200mV (say 203 to 207mV). When I remove my probe out of the solution, I see that my display is indicating all possible values between 0 and 900mV before returning to 0mV. I don't want my probe to pick up noises from the environment. It is also displaying some junk characters before returning to zero. How am I supposed to eliminate such erratic behavior?

I am planning to actuate a relay using the displayed voltage. I am worried whether any devices would be actuated due to such erratic behavior.


Sairam


      
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