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Impedance Spectra
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EIS Spectrum Analyser
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Menu: Open
File / Open data file
Select File / Open data file in the menu or click button in the toolbar. An impedance spectrum in Nyquist coordinate system (real part of impedance vs. imaginary part of impedance, ReZ vs. ImZ) will appear in Impedance Spectra plot. Opening a new file replaces the previously loaded data. Use Graph submenu to switch between Nyquist to Bode plots.
Data file structure
The following data file structure for impedance spectra is presently supported:
n
ReZ_{1} ImZ_{1} Freq_{1
…
}ReZ_{n} ImZ_{n} Freq_{n
}
n is the number of points in the impedance spectrum, ReZ  real
part of impedance (Ohm), ImZ  imaginary part of impedance (Ohm) (ImZ is
stored multiplied by 1), Freq  Frequency (Hz). The data are stored in
descending frequency order, each point of the spectrum in a separate
line.
File / Open Project
Opens an EISSA project (a file with eis extension, which stores impedance data and the status of all panels). Using this option you may resume your saved unfinished work on a spectrum.
EIS Spectrum Analyser, 2008

