You can check that:

http://www.abc.chemistry.bsu.by/vi/analyser/

thnx for the suggestion , but I have all the data in txt file , it cant be read by the EIS Spectrum Analyser.

Yes, you need some extra work... You need first to adapt your data (with a text editor) and save it as "*.eis"

Data file structure:

The following data file structure for impedance spectra is presently supported:

n

ReZ1 -ImZ1 Freq1

…

ReZn -ImZn Freqn

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.

Hi Manas,

You can try this free software ZSim Demo (http://www.echemsw.com/demo02.htm)..

I guess it would not be a problem even if your data is in txt format.

All the best,

Hazwan

I generally use e-chem analyst. It is a software from Gamry Frameworks, it is free and pretty much dependable.

I suggest VersaStudio. I just started it for EIS. You can follow this link:

http://www.princetonappliedresearch.com/Our-Products/Electrochemical-Software/VersaStudio.aspx.

When I did not have access to Nova software (needs license), I used ZView - a free version. Z view can accept data in .txt file. But compared to Nova I was not so happy with it.

There is a problem in using Zview, the trial version allows you to use only 15 data points. Any suggestions for this? 

@ Anil, you can open the data file in origin, arrange the data in 3 column as Freq, Real Z, -(ImZ), select all the three columns and go to EXPORT option in File menu followed, save file in ASCI-II format, it stores your file in .dat format., which is compatible with Zview software.

Did you try VersaStudio? 

can any body tell me how to get the Zview software. I am trying to get it for quite a long time. Any downloadable link will be of great help to me......

Try links here: http://al-chemist.info/node/156

http://al-chemist.info/node/156

thank you Alex Lugovskoy 

@Muhammad Shuja Khan, I have installed Versa studio, but i am unable to find the circuit fitting feature. Can you kindly guide on it?

Hi all

I can suggest EIS spectrum analyser to probe the circuit model and its parameters.

Cheers

viswanathan

You can use Zsimpwin. The trial software is online. You can fit and see the results of fitting graphically. But if you want to know the circuit parameters, you must purchase the full version which cost around $1,000 in 2010.

i use Zview softwere for calculating impedance spectral analysis. it is excelent.

Hello everyone

How to extract files via original .dat extension compatible with the software ZView

cordially

ZSimpwin software is the best for this.

Sanjeez Kumar Sharma can u plz share the right download lind for ZSimpwin software....

Hi, Also I am doing impedance spectroscopy measurement and I want to fitting data. Which one software should be use in windows. Any suggestions for this?

ZSimpwin software is the best and free software.

Hi,

It's not free but I am developing an Impedance Analysis Software called RelaxIS for the company rhd instruments (disclaimer: I work for rhd). RelaxIS is not bound to a particular type of measurement device and offers many features in regards to fitting, simulation and  advanced analysis like DRT. It also treats spectra's metadata like temperature and allows you to e.g. perform an Arrhenius analysis directly in RelaxIS. You can find more information on our website (see link below). Just contact us for more information :-)

https://www.rhd-instruments.de/en/products/software/relaxis

Can anybody tell me the formula of electrical conductivity from dielectric data 

I think this link will be helpful for you...

https://www.researchgate.net/post/Dielectric_Constant_F_m_vs_Conductivity_S_cm

Dear Shaveta , the simple formulae for the real and imaginary parts of Ac conductivity in terms of imaginary and real parts of complex relative permittivity are as follows  sigma'(omega)=omega.epsilonnot.epsilon doubleprime (omega).&

Sigma"(omega)=omega.epsilon not.epsilon prime(omega).where omega represents angular frequency; epsilon not is the vacuum permittivity and epsilon prime and epsilon double prime are the real and imaginary parts of complex relative permittivity. Hope, this will do for you. 

Thanx a lot Ashutosh Sir

Thanks Ehsan Ziyaei sir

@ If you have z.view with his sireal number. that is very good .because  the trial version  of z.view  will detail  only with  15 point 

Thanks Yousuf Air,  Bt I don't have it's serial number

Dear all, please help me to draw impedance graphs using Z view software..... Plz give me step by step detail...

Thanks,

ElchemaAnalytical ( http://www.elchemea.com ) does have a batchfitting option like you describe if you do a local installation.

I've used Echem Analyst that is free and easily available.

https://www.gamry.com/support/software-updates-3/

What is range of chi square value acceptable for EIS fitting?

@Mangesh Pise: It is not really possible to give a range of Chi² as particularly good or bad. Chi² is in essence the sum of squared residuals (just scaled with degrees of freedom) and depends on things like number of datapoints (even though it is included in the DOF), their sizes (e.g. a fit of a conductivity spectrum in the kilo-ohm range will probably always have a higher Chi² value than battery spectrum in the milli-ohm range) and the weighting method. If you are always looking at similar spectra with the same parameters you may be able to compare Chi², but as a generalized quality-of-fit parameter it is not really suitable.

Better factors may be

1) Normal distribution of residuals

2) Chi² calculated from residuals weighted by the inverse square of the individual data points (proportional weighting)

3) The R² value, but be careful, there are multiple ways to calculate it for non-linear fits

4) Parameter errors from the fits covariance matrix, or e.g. calculated by a bootstrap method I had also implemented in RelaxIS) can give information of the suitability of the model

So determining fit quality is not really easy or straightforward. Always check careful, if the values you get at least make sense from the spectrum at hand and their physical meaning.

Thanks Jens!

You can edite the data file in text format. In doing so, remove the first line in the file(first line is parameter name), then remove the empty space in the bottom of the data(the spcae bewteen last data point and the end of the page). In the final step, rename the data file to .dat and save it. Now Zview will show all data points. Hope it helps.

Hello guys,

Out of all these software, does any one know which free software does batch processing and circuit fitting ? Zview is one example. Any other softwares ?

ZSim is an another software which you can use it.

Thank you sir

For information regarding second software of impedance analysis.

MEISP

This is a “Multiple EIS parameterization” software that uses LEVM engine for fitting but adds to it ability to analyze multiple spectra together and observe tendencies of parameter changes. It supports automatic pre-fit of initial guesses, which eliminate the need of manual guessing and allows forcing of time-constant order to different elements. Graphical presentation of the spectra, results and parameters is also included. In addition it includes rich library of commonly used equivalent circuits and distributed elements (such as limited length diffusion), that can be included as part of the circuits. There is also a graphical circuit editor that allows to create arbitrary circuits, as well as support of user created models as DLLs.

Ccommercial version of this program is no longer available because project was discontinued, but there was a fully-functional trial version that was freely distributed. See details and download link here:

http://impedance0.tripod.com/#3

Own software based on statistical methods like genetic algorithms abd particle filters:

https://doi.org/10.1016/j.electacta.2005.02.123

https://doi.org/10.1016/j.electacta.2011.01.047

Hello!

The best and accurate method is fitting Impedance spectra by your CHI or autolab analyser itself, by interpreting the mechanism after recording the spectra. It is true and reliable than using any software analysis.

I have used MEISP. It is free and good too.

After fitting directly the EIS data in CHI software, how to extra the data of the fitted graph to plot it in Origin. i tried but only got the data of the original graph.@Bushra Ali

Arnauld Robert Tapa it depends what kind of Plot you want. On Origin you can plot only between two entities e.g. Rct Versus RS, Rct versus WI and so on. If you want, send me Data and I can plot for you or we can have a discussion on Microsoft meetings.

you can also consider:

EIS Spectrum Analyser

and old-school soft EQUIVCRT by Bernard Boukamp

Hi, in the demo version of EC-Lab (which is free to download here:https://www.biologic.net/support-software/ec-lab-software/), the EIS data modeling tool is included. Its name is Zfit. you can also find some tutorials here: https://www.youtube.com/watch?v=_NkRdObUeCk

Hope it helps, Aymeric