How do I set the TLOG calculation's reset timer?

For relative time, set the time until the end of the interval (00:01–24:00). For absolute time, set a reference time, then select an interval from the following.
1min, 2min, 3min, 4min, 5min, 6min, 10min, 12min, 15min, 20min, 30min, 1h, 2h, 3h, 4h, 6h, 8h, 12h, 24h