RelaxIS supports binary data formats from many manufacturers of measuring devices. Files can be easily loaded by drag&drop into RelaxIS.
This skips the need to first export and reprocess the measurement data before it can be used. We continually develop this functionality, since it is an important factor in the increase of efficiency during everyday work.
RelaxIS manages not only raw impedance data, but also additional metadata like temperature, or DC bias for each spectrum. The data can be loaded from the file, or manually attached later. Metadata is used in various advanced evaluation features.
Spectra can be plotted in different views like Bode or Nyquist plots as well as in various transfer functions like impedance or admittance.
Combined plots of multiple spectra and 3D graphs can be created, allowing for an easy comparison.
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.
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.
Tired of manually adjusting parameter values until the fit works?
The RelaxIS Auto Fit feature does it for you. 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.
RelaxIS can calculate the distribution functions of time constants 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.
In addition to the raw data export into text files it is also possible to create rich reports about the evaluated spectra.
These reports are fully customizable and can contain graphs, evaluation results or metadata about the spectra.
The reports are HTML based and therefore very flexible.
It is possible to create plugins for RelaxIS by using the RelaxIS SDK.
The plugins can extend the functionality of RelaxIS with new transfer functions, circuit elements, file formats and more.
The plugins can be written in C# or in VB.NET using either a third-party IDE or an integrated code editor.
RelaxIS Remote allows you the completely autonomous evaluation of measured data.
Data can be sent from external devices through either FTP or WCF connectivity to RelaxIS.
The data is then evaluated and stored based on settings defined by the sender. Afterwards the results can be sent back to the sender as raw data and/or reports.
Besides the pure fits and circuit diagrams, RelaxIS offers numerous additional helpful tools. These include for instance automated fits of the fit results to temperature-dependent functions (Arrhenius / Vogel-Fulcher-Tamman).
A simulation software for calculation of circuit data, parameters and measurement conditions is a useful implement in research as well as in employee training.
Residual analysis or a linear Kramers-Kronig check assists in the evaluation of the quality of measurement data and fits.
The creation of user-defined circuit elements enables a very flexible extension of the existing range of functions to other, user-specific problems.
RelaxIS 3 can be installed on any computer running Microsoft Windows 10 or 11 with .NET Framework 4.7.2.
The .NET Framework is pre-installed on most systems, or directly available from Microsoft.
The software RelaxIS - Impedance Spectrum Analysis has for instance been used for the following applications:
A great advantage is the ability to read data formats of varying measuring devices as well as the elegant and fast evaluation of numerous series of measurements with many spectra.
Support for Windows 7 has ended. It is recommended updating to Windows 10.
For Windows 7 users, don't update via the integrated updater. Instead, download the dedicated Windows 7 installer from https://www.rhd-instruments.de/relaxis-downloads/
Note that Windows 7 support for RelaxIS ends on December 31st, 2021.
Important for Windows 7 Users: An error may cause RelaxIS to not start correctly on Windows 7 installations. We recommend using v.3.0.15 until this is resolved in a maintenance update.
This may break projects with models using circuit element plugins with the same abbreviation. Please contact
SDK Breaking Changes
Note: To store the results, the EIS3 database format was updated. Old EIS3 files will be updated automatically to the new format. This creates MigrationBackup files for safety at their old locations.
Updated the Codemeter Runtime to version 6.30d
PLEASE INSTALL THE CODEMETER RUNTIME, AS IT WAS UPDATED TO A NEW VERSION!
Please install the Codemeter Runtime during the installation, as it was updated to a new version in this release.
Please note: Changes to the RelaxIS SDK may cause your plugins to not load properly. You may need to recompile and/or adjust the code to fix them.
Important: If you have PLUGINS you need to update them in order to use them in 220.127.116.11 due to changes in the SDK. Refer to the manual and SDK documentation.
This is the initial release of RelaxIS 3.It is a complete overhaul over RelaxIS 2 with many improved old and a lot of new features. Highlights include: