Computer Connection to Pinpoint PH Meter

[johnfr]

I am wondering if anyone has researched the possibility of modifying a standard Pinpoint PH Meter to allow monitoring with a computer. I do electronic insturmentation all the time and have noumerous DAQ boards that I could use to monintor PH, Temp etc.. I just ordered a Pinpoint PH monitor and would like to connect to a spare computer.

Usually these kind of instruments have some anolog electronics with a DC voltage that varies as a function of the PH value. This DC voltage is then read by an A/D converter to be displayed by the digital display. I am hoping someone has alreay located the point in the circuitry at which I can tap off the DC voltage.

 

[Gordonious]

Have any luck with this? Seems as if no one responded was curious if you found anything on your own or in another thread.

 

[johnfr]

Never had any responses to this post. I have not opened up my Pinpoint as I don't want to void warrenty. I have found a couple of high input impedence circuits that can be used to read and amplify the output of a standard PH probe. The output of these curcuits can be readily digitized by any standard DAQ card. I haven't built it yet as I have been dealing with health issues this last 2 months. If interested I could send to you if you want to send me your email by private mail.