after checking the wave forms of voltage, current, power , i have exported all data & saved.
but when i open the session later, i could not get the complete session, only the session which was on front available.
how to save entire sesssion without loss , pls suggest
I am not sure that I understand what you are asking. I think that you want to record data for longer that what is displayed on the screen. Have you tried the record button on the sidebar?
Press once to start the recording. Press again to stop the recording. In the Joulescope UI, you can then select View → File and File → Open to view the file. You can also double click on on the file under Windows File Explorer.