What sampling interval do you wish to use ?
I would suggest trying our Beta software http://labs.picotech.com/#psw6
setting the "Collection Time" to something like 200 s/div, approximately 33minutes plus for the screen, and importantly set the "Number of Samples" upto the maximum. Right click on the display and select "View Properties" and you will see exactly what scope settings have been selected.
The trace will stream very slowly across the screen and not look very clear, however you can zoom in to see the data in more detail once the capture is complete.
Hope this helps.