Wednesday, 8th February 2012

EPR Converter (e2a)

The Bruker spectrometers output data by default in the Bruker BES3T format, which whilst being perfectly usable is not recognisable by most operating as standard.

This script was originally written for the benefit of the project students in the lab who wanted to plot their cw EPR data in Excel without going to the trouble of learning how to use MATLAB. Or for going back to the spectrometer and trying to export their data in ASCII format.

Instead, they can call e2a (EPR spectrum “2” ASCII), they are presented with a standard “Open file” window to select the file.  A message box then asks whether they want the converted file put into the same folder or somewhere else, which if selected presents a standard “Save as” window to save elsewhere.

By default files are saved as standard comma seperated value files (*.csv) which are directly readable by Excel / OpenOffice / etc

More advanced users can specify delimiters and other file extensions, for example:

E2A = ('path/to/file.DTA',' ', '.txt')

Takes the file “file.DTA” and converts it to “file.txt” where values are seperated with a space rather than the standard comma


E2A ('path/to/file.DTA')
E2A (delimiter)
E2A ('path/to/file.DTA',delimiter)
E2A ('path/to/file.DTA',delimiter, extension)
E2A ('path/to/file.DTA',delimiter, extension, interval)


input1      – The path to a file

input2      – Delimiter is the seperator in the file ‘,’ for comma, ‘ ‘ for space, ‘\t’ for tab, etc
input3      – Extension is the file format to output eg ‘.csv’ , ‘.txt’, ‘.dat’, etc
input4      – Desired magnetic field interval eg 0.2 to use interpolation to give data points every 0.2 Gauss


output      – a file by default a common seperated value file (.csv)



Standard use, a graphical user interface to select file to convert and where to put it

E2A = ('/path/to/file.DTA',' ','.txt')

Take the file “file.DTA” and convert it to “file.txt” where values are seperated with a space rather than the standard comma

Available for download here

This script also requires BrukerRead to run

About Morgan Bye

Scientist, programmer and all around techie


EPR toolbox