Converting a *.chn file to a text file Convert an Ortec 1000 channel file (*.chn) to a text file as follows: First click on the "browse" button to select the *.chn file from your computer. Next, click on the "Upload *.chn File" button to upload the file to memory. Then, click on the "Write Data to text window" button to produce a text file of the data. Finally, copy and paste the data in the text window to a text file on your computer.