The log interval defines the time between two successive recorded points. When recording, the L-min, L-max and Leq are reset at the beginning of each log interval. Then the instrument observes the signals for the duration of the log interval, and updates the L-min, L-max and Leq accordingly. At the end of the log interval the selected levels are written to memory. Then the next log interval is started… and so on until the recording is stopped or the memory is exhausted.

 

The log interval can be adjusted from 125 ms (1/8th s) to 2 H in increments of 125 ms.

 

The amount of memory consumed is inversely proportional to the log interval. The Memory-Depth indicator in the Setup panel automatically calculates the overall recording time as a function of the selection.