AquaController Jr PH calibration issues

[KyleO]

I just got through setting up my new AquaController Jr. and calibrating the PH probe. I already had a PinPoint PH meter on the tank and when I stuck the AC Jr. PH probe in after calibrating I was very surprised to see quite a difference (Pinpoint reads 8.22 and the AC Jr. reads 8.06).

I calibrated both units again and tested the tank water against a chemical PH test and it reads closer to the Pinpoint. I do notice that the AC Jr. initial readings before setting the calibration set point is quite a bit off. The initial reading with the 10.01 calibration fluid is around 11.4 and the initial reading with the 7.01 calibration fluid is around 9.

I see that the AC Jr. adjusts down the the true PH level of the cal. fluid by measuring the calibration fluids after the calibration. After calibrating both units read the calibration fluids true (7 & 10) but disagree quite a bit when it comes to the tank water.

What the heck is going on?

Anybody have experience and/or advice with this???

[crab0000]

You may want to ask in the Neptune forum; they may know what's going on. http://www.reefcentral.com/forums/fo...s=&forumid=368

[KyleO]

Originally posted by crab0000
You may want to ask in the Neptune forum; they may know what's going on. http://www.reefcentral.com/forums/fo...s=&forumid=368

Thanks! I did............didn't know there was a Neptune forum.

Thanks again!

[chris4869]

You might have a defective probe. My AC Jr PH probe went through the same thing. Try to keep it away from electrical equipments.

[crab0000]

Originally posted by KyleO
Thanks! I did............didn't know there was a Neptune forum.

Thanks again!

No problem, glad I could help a little.