Impedance with PmodIA decreases

[Gabi22]

Hi,

I'm trying to measure the impedance of a KCl solution with the PmodIA. First, I've measured the impedance with the EVAL-AD5933 and then I compared it with the PmodIA. We can observe that the impedance decreases and it is not constant with the PmodIA and I would like to know why? I'm using both devices in the same conditions. I'm using a 100kOhms resistor to calibrate.

Thanx

[jpeyron]

Hi @Gabi22,

Here is a forum thread where the forum member was able to get all of the functions working correctly. They also posted some helpful setup and usage hints as well as their code(unverified). I haven't worked with the PmodIA but I do know that there are specific calibration ranges in reference to impedance.

cheers,

Jon