How do I copy logged data from the TV2 to a computer?

Use the free TView software over USB or over your local network. TView finds monitors on the LAN, downloads the log, and draws a chart on screen. You can download on demand or leave automatic download running.

With automatic download enabled TView writes a new file each month for everything logged during that month, so backups accumulate without anyone having to remember to do it.

Downloading does not erase anything on the monitor. The log stays in non-volatile memory on the TV2 whether or not you ever connect a computer.