Hi,
Let's say you want to update the datatable cell Table1.A1 with the value from Pot1 (can be any source) when Pushbutton Pb1 is pushed.
Make the following connection using Edit connections for the Table1.A1 datamember to achieve this:
Table1.A1 = if(Pb1, Pot1, Table1.A1)
This should be pretty clear; for the false condition, we write back the value from the cell to the cell when Pb1 goes false (thus not resetting the value).
Please give more info' on what kind of pH calibration system you're trying to build. May be someone here may have ideas you can use.
Good luck!
Khalid 🙂