Class 1 Sound Level Meter NL-53 / Class 2 Sound Level Meter NL-43
with Extended Function Program NX-43EX Instruction Manual Operation Guide

10.7 File organization

  • * The extension .rnd is a store data file.
  • * The extension .rnh is a header file where settings etc. are recorded (Auto only).
  • * For Leq store, files are divided every 60,000 stores.
  • * For Lp store, files are divided every hour.
  • * Lp store is divided every 1000 files.
  • * NL-53 has the same file structure.
File organization