In the LA-7000 series Sound Level Meter, data files are automatically saved and named.
ex) SNGL-AUTO_-A072-200707131140.csv
If A001→A999 is used, the next data file will be B001.
When B…, C…, up to Z999 are used, it returns to A001 again.
However, the time stamps after Axxx are different,
thus they will be recognized as different file names and saved.
Revised:2020.07.08