Dear Cyril,

From an impedancemeter you detemine the impedance Z of your device under test as a function of frequency.

You can represent the evolution of the impedance with frequency in various ways including Cole-Cole, Nyquist, Bode, etc.These plots have various avantages and drawbacks, but they mostly help you determine the "nature" of your device under test (which will help you come up with the right model).

Based on your question, I assume that your device under test is a capacitance (e.g. a ceramic slab between electrodes). In this case, it is commonly assumed that you can model your system with a RC parallel circuit and determine the dielectric contant from the characterization of the complex impedance. But if your device under test is more complicated (e.g. a not-so-good thin film with a complicated electrode structure), then you will need to search for the right model that fits to your case.

I am not familiar with the software that you would like to use, so I can't help with that. But I can tell you that finding the right model may become a challenging task.

Thank you Charlotte for your kind reply.

Dear Chelliah,

I used ZSimpWin software to fit my impedance data and you will get all possible equivalent circuit to get all the value. To fit impedance data we need frequency, real part of impedance and imaginary part of impedance. I checked your data but i could not find the imaginary part.

But your data shows almost capacitance behavior.

Best Regards,

Bapi