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

Organization of This Manual

This manual describes the functions and operation method of the Class 2 Sound Level Meter NL-43 and Class 1 Sound Level Meter NL-53. When the measuring system is configured with other equipment, make sure to read the instruction manual of the equipment for how to operate the other equipment.
In addition, safety precautions are described on “Safety Precautions” onwards. Please be sure to read them.

The manual consists of the chapters listed below.

  • Overview of This Product
    Describes the basic information on this device.
  • Terminology and Notation
    Explains notation such as quantifiers and their names.
  • Name and Function of Each Part
    Briefly describes the name and function of each key and port.
  • Turning on the Power
    Describes how to turn on the power.
  • Reading the Display
    Explains the symbols displayed on the screen.
  • Setting Menu
    Describes how to configure the settings of the device.
  • Store Operation
    Describes how to store the measurement data.
  • Connection with Peripheral Devices
    Describes how to connect peripheral devices.
  • Calibration
    Describes how to calibrate the device.
  • Measurement
    Provides the basic explanation of measurement.
  • Optional Programs
    Describes optional programs.
  • Specifications
    Lists the technical specifications.

About Extended Function Program NX-43EX

By installing the Extended Function Program NX-43EX, the following functions are added to the NL-43/NL-53.

  • Auto store function (including Maker function)
  • I-time-weighted calculation function
  • Comparator function
  • Trigger function for measurement start
  • LAN communication
  • Continuous data output function
  • Other optional programs such as Waveform Recording Program NX-43WR can be installed
Icon Meaning
NX-43EX This mark is a function given by the Extended Function Program NX-43EX.