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Rion NL-21 User Manual

Rion NL-21
164 pages
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INSTRUCTION MANUAL
Sound Level Meter
NL-21 / NL-31
3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
http://www.rion.co.jp/english/
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Rion NL-21 Specifications

General IconGeneral
TypeSound Level Meter
Frequency WeightingA, C
Time WeightingFast, Slow
Microphone1/2 inch electret condenser microphone
Measurement Level Range30 dB to 130 dB
Frequency Range20 Hz to 8 kHz
DisplayLCD with backlight
Applicable standardsIEC 61672-1
Measurement functionsLeq
Measurement time1 second
PowerAC adapter or battery
Battery Life30 hours

Summary

Controls and Functions

Unit Views and Components

Details the physical layout and components on the front, bottom, and rear of the unit.

Operation Keys

Comprehensive guide to all control keys and their respective functions.

Preparations

Power and Connectivity

Covers power supply options, battery insertion, AC adapter, and peripheral connections.

Calibration and Settings

Procedures for setting date/time, contrast, language, and performing unit calibration.

Display Interpretation

Understanding the Display Screen

Explains the meaning of various symbols, indicators, and menu screens.

Power On/Off Procedures

Step-by-step instructions for turning the unit on and off.

Measurement Procedures

Basic Sound Level Measurement

Step-by-step guide for performing basic sound level measurements.

Advanced Measurement Types

Instructions for measuring Leq, LE, Lmax, Lmin, LN, and auxiliary values.

Back-Erase Functionality

How to use the function to exclude data from processing.

Data Storage and Management

Storing Measurement Data

Details manual, Auto 1, and Auto 2 modes for saving data.

Reading and Clearing Data

How to recall, view, and clear data from memory or storage.

Optional Accessories

Microphone Extension Cables

Information on using extension cables for the microphone.

Printer and Recorder Connections

Guides on connecting printers and level recorders for data output.

Filter and Program Cards

Details on using filter program cards and loading software.

Messages and Troubleshooting

Error and Information Messages

Explains various messages displayed by the unit during operation.

Specifications

Technical Specifications

Lists applicable standards, measurement functions, ranges, and characteristics.

Power and Output Details

Information on power requirements, output signals, and connectors.

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