RelaxIS

Save valuable time by quickly importing data without prior export

RelaxIS supports many file formats produced by various analyser manufacturers. So you can import your files directly without the need for a prior text export.

Also benefit from customisable text file import to load multiple spectra simultaneously from one file – including metadata like temperature or voltage if available.

Flexible data visualization

The visualization of impedance spectra is an important, but often overlooked aspect of data analysis. 

RelaxIS offers a multitude of ways to look at your data, i.e. freely customisable Nyquist- or Bode-, overlay- and 3D-plots (allowing an easy comparison) as well as in various transfer functions like impedance or admittance.

You can even use live-analysis views like DRT or KK that shows quick calculations while browsing the data.

All graphs can be exported into image or vector graphic files or as raw data

An arbitrary number of spectra can be loaded into RelaxIS. Each spectrum can be assigned to one or more equivalent circuits.

The ease of testing different models for fitting your data improves the ability to explore possible interpretations of the measured processes.

Besides all common equivalent circuit elements, RelaxIS also features common Transmission Line Models (TLM) and a custom TLM-builder.

Further user-defined elements can be added via the RelaxIS plugin system, that allows you to program your own models in C# or VB.NET

You don’t just measure one spectrum, right?

RelaxIS offers powerful tools to initialize fits, like painting shapes into the data or a genetic algorithm to assist in the initialization of the parameters.

In addition, it is possible to evaluate particular types of spectra fully automated using the fit wizard. These include conductivity measurements or battery spectra. Here, only minimal user interaction is necessary.

If larger data sets are analyzed, a batch fitting routine can be applied. It enables the evaluation of related spectra with only a single adjustment of the initial values. Depending on the application, the analysis of several dozen spectra per second is possible.

Powerful Auto-Fit

RelaxIS Auto Fit feature automatically adjusts parameter values until the fit works. Simply choose a model, and the Auto Fit takes care of the rest.

Employing a powerful genetic algorithm optimized for use with EIS spectra, most models can be fitted very reliable out of the box.

For the very hard cases you can take full control over the parameters.

Outstanding DRT calculation features

RelaxIS can calculate the distribution functions of time constants (DRT) for your spectra. Multiple spectra can be selected at a time for batch processing. 

In the DRTs you can perform peak-picking and integration and export these results for further use.

RelaxIS 3 allows you to further evaluate the model parameters you obtained from fitting to equivalent circuits.

The parameters can be plotted, recalculated and fitted as a function of metadata variables such as temperature or DC bias.

This allows for example the fitting of temperature dependent data to VFT- and Arrhenius-models, but extends the functionality of RelaxIS 2 by allowing other, arbitrary models as well.

A fast and easy export of the data into other applications is essential. For this purpose, RelaxIS provides extensive possibilities to export the various data into easy-to-use data formats. 

Besides the pure fit results, also data like spectra with fit curves, circuit images and all other sorts of plots can be placed into text files or the Windows clipboard.