I use DrDAQ for pH measurements and the readings are not correct with the picolog recorder, where the reading is stuck in a value around 7 in all cases. Moreover, readings shows 7.56 in 0.1mol/L HCl solution, and 6.74 is shown in 0.1mol/L NaOH solution.
This situation is quite the same also in Parallel Port and USB Parallel Port
I use picolog recorder rerease R5.20.1 and Windows Vista Home Premium SP1.
Could you please offer a solution?