Here's a question that hopefully a non facebook user can get answered.
My alkatronic has traditionally reported higher than the actual DKH (control being the Hanna checker but accuracy isn't what this question is about.) I chalk this up to not being able to get my alkatronic less than 3 feet away from a water source, so I have to rely on baseline calibration adjustments to ensure pallpark DKH.
I recently recalibrated all the pumps and pH probe. While I was at it I wanted to reset the baseline calibration as well.
Although I'm somewhat confident that I did it right, here are the steps I used to do it.
Settings
Disable Baseline Settings
Save
Extra measurement Start
*after the test completed it displayed 8.85, the hanna checker displayed 7.8
Settings
Baseline Calibration
Reference DKH = 7.80
Alkatronic DKH = 8.85
Ok
Save
Extra measurement Start
*after the test completed it displayed 7.79
Task seemed to be completed, however over the course of the night the readings started to ascend back to the previous Baseline numbers (which hovered around 8.10). Upon noticing this morning, I grabbed the hanna checker and the DKH was still 7.8.
Here's a snapshot of the graph, I can also post the Table/History if necessary
Can someone explain this problem? And how to go about fixing it? I personally lean towards an algorithm correction, where it tries to predict levels instead of actual and displays them based on history. But that is a crackpots hypothesis. I would like someone with actual knowledge to help diagnose it.
Thanks