Rion NL-21 Manual de usuario

INSTRUCTION MANUAL

Sound Level Meter

NL-21 / NL-31

3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan

http://www.rion.co.jp/english/

Organization of the NL-21/NL-31 Documentation

The documentation for the Sound Level Meter NL-21/NL-31 consists of three

separate manuals.

zInstruction Manual (this document)

Describes operating procedures for the Sound Level Meter NL-21/ NL-31,

connection and use of peripheral equipment such as a level recorder and printer,

and use of the memory card.

zSerial Interface Manual

Describes how to use the serial interface built into the Sound Level Meter

NL-21/NL-31. The manual covers the communication protocol, use of

control commands for the sound level meter, format of data output by the

sound level meter, and other topics.

zTechnical Notes

This document provides in-depth information about the circuit

configuration and performance of the sound level meter, microphone

construction and characteristics, influence of extension cables and

windscreen on the measurement, and other topics.

* Company names and product names mentioned in this manual are usually

trademarks or registered trademarks of their respective owners.

To conform to the EU requirement of the Directive

2002/96/EC on Waste Electrical and Electronic

Equipment, the symbol mark on the right is shown

on the instrument.

iii

Organization of This Manual

This manual describes the features, operation and other aspects of the General-

Purpose Sound Level Meter NL-21 and High-Precision Sound Level Meter

NL-31.

The manual contains the following sections.

Outline

Gives basic information about the configuration and features of the

unit, and also contains a block diagram.

Controls and Functions

Briefly identifies and explains the controls and connectors and all other

parts of the unit.

Preparations

Gives information about power supply, pre-use checks, installation,

connections, key settings etc.

Reading the Display

Explains the symbols and other information appearing on the display

of the unit.

Power On/Off

Explains how to turn the unit on and off.

Measurement

Explains how to perform measurement.

Store Operations

Explains how to store measurement results in the memory of the unit.

Memory Card

Explains how to use memory cards with the unit.

Default Settings

Lists the factory default settings of the unit.

Output Connectors

Explains the output connectors of the unit.

Optional Accessories

Explains how to use external equipment for example to store measure-

ment data.

Messages

Explains the various messages that may appear on the screen.

Specifications

Lists the technical specifications of the unit.

FOR SAFETY

In this manual, important safety instructions are specially marked as shown below.

To prevent the risk of death or injury to persons and severe damage to the unit or

peripheral equipment, make sure that all instructions are fully understood and observed.

Caution

Important Disregarding instructions

printed here incurs the risk of

damage to the product.

Disregarding instructions

printed here incurs the risk of

injury to persons and/or dam-

age to peripheral equipment.

Mentioned about the tips to use

this unit properly. (This mes-

sages do not have to do with

safety.)

Note

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Precautions

zOperate the unit only as described in this manual.

zProtect the unit from shocks and vibration. Be especially careful not to

touch the microphone membrane to avoid damage. The membrane is an

extremely thin metal film which can be damaged easily.

zDo not use the unit with a different microphone/preamplifier from the

one indicated on the name plate of the unit.

zAmbient conditions for operation of the unit are as follows: temperature

range -10 to +50°C, relative humidity 10 to 90%.

Protect the unit from water, dust, extreme temperatures, humidity, and

direct sunlight during storage and use. Also keep the unit away from air

with high salt or sulphur content, gases, and stored chemicals.

zAlways turn the unit off after use. Remove the batteries from the unit if it

is not to be used for a long time. When disconnecting cables, always

grasp the plug and do not pull the cable.

zBefore using the microphone and before putting it away, always check

that the microphone grid has not become loose. If this has happened,

refasten the microphone grid firmly and then use or store the microphone.

zClean the unit only by wiping it with a soft, dry cloth or, when necessary,

with a cloth lightly moistened with water. Do not use any solvents, cleaning

alcohol or cleaning agents.

zDo not try to disassemble the unit.

In case of an apparent malfunction, do not attempt any repairs. Note the

condition of the unit clearly and contact the supplier.

zDo not tap the LCD panel or other surfaces of the unit with a pointed

object such as a pencil, screwdriver, etc.

zTake care that no conductive objects such as wire, metal scraps, conductive

plastics etc. can get into the unit.

zTo ensure continued precision, have the unit checked and serviced at

regular intervals.

zWhen disposing of the unit, be sure to observe all applicable legal

regulations and guidelines in your country and community.

vii

Quantifier Notation of Sound Level Meter NL-21/NL-31 According to

International Standards and JIS

(Excerpts from ISO 1996, 3891, IEC 61672-1:2002, JIS Z 8202, 8731)

viii

Contents

FOR SAFETY .................................................................................... v

Outline ................................................................................................ 1

Controls and Functions ...................................................................... 4

Front View .................................................................................... 4

Operation Keys ............................................................................. 5

Bottom View ................................................................................. 8

Rear View...................................................................................... 9

Preparations ...................................................................................... 10

Power Supply .............................................................................. 10

Windscreen (WS-10) .................................................................. 13

Tripod Mounting......................................................................... 13

Memory Card, Program Card ..................................................... 14

Microphone Extension Cables (EC-04 series)............................ 15

Connection to a Printer (DPU-414, CP-11, CP-10).................... 17

Connection to a Level Recorder

(LR-06, LR-07, LR-04, LR-20A).................................... 20

Connection to a Computer .......................................................... 20

Setting the Date and Time .......................................................... 21

Measurement in Dark Locations................................................. 23

LCD Contrast.............................................................................. 24

Calibration .................................................................................. 25

Language selection ..................................................................... 30

Reading the Display ......................................................................... 31

Display screen............................................................................. 31

Menu screens .............................................................................. 36

Power On/Off ................................................................................... 45

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