Rion NA-83 User manual

3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
http://www.rion.co.jp/english/
INSTRUCTION MANUAL
SOUND LEVEL METER
NA-83

i
Organization of This Manual
This manual describes the features, operation and other aspects of the Sound Level
Meter NA-83. If the unit is used together with other equipment to congure a mea-
surement system, consult the documentation of all other components as well. The
following pages contain important information about safety. Be sure to read and
observe these in full.
This manual contains the following sections.
Outline
Gives basic information about the unit.
Controls and Functions
Briey identies and explains the operation keys and connectors and all
other parts of the unit. The display content is also explained.
Connections
Explains how to connect the microphone and AC adapter.
Menu Setup
Describes the various menu screens that are used for setting up the unit.
Calibration and Operation Check
Explains how to calibrate the unit and verify correct operation.
Measurement
Explains the basic procedure for making a measurement.
Connectors
Provides information about the MIC. IN connector on the front panel, and
the pin layout of the connector on the rear panel. A connection diagram is
also shown.
Default Values
Lists the settings that are active when power is supplied.

ii
* All company names and product names mentioned in this manual are
trademarks or registered trademarks of their respective owners.
Technical Reference
Provides information about the conguration of the unit, electrical and
acoustic specications, IEC compliance, and other items.
Specications
Lists the technical specications of the unit.
Serial Interface
Transfer Format and Protocol
Provides information about connection to a computer, and the procedures
for command reception and data transfer.
Commands
Lists the commands that are available to control the unit and retrieve mea-
surement data.

iii
FOR SAFETY
In this manual, important safety instructions are specially marked as shown
below. To prevent the severe damage to the unit or peripheral equipment,
make sure that all instructions are fully understood and observed.
Important
Disregarding instructions
printed here incurs the risk of
damage to the product.
Mentioned about the tips to
use this unit properly. (This
messages do not have to do
with safety.)
Note

iv
Precautions
Operate the unit only as described in this manual.
The NA-83 is a precision instrument. Protect it from shocks and vibra-
tions. Take special care not to touch the microphone diaphragm. The
diaphragm is a very thin metal lm which can easily be damaged.
Use only the microphone with the number as shown on the name plate of
the unit.
Do not use the unit in an environment where the specications for ambi-
ent temperature and humidity may be exceeded (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.
Always turn the unit off after use. When disconnecting cables, always
grasp the plug and do not pull the cable.
Before using the unit and before putting it away, always check that the
microphone grid has not become loose. If this has happened, refasten the
microphone grid rmly and then use or store the unit.
Clean the unit only by wiping it with a soft, dry cloth or, when neces-
sary, with a cloth lightly moistened with water. Do not use any solvents,
cleaning alcohol or chemical cleaning agents.
Do not try to disassemble or alter the unit. Otherwise type certication
will become invalid. In case of an apparent malfunction, do not attempt
any repairs. Note the condition of the unit clearly and contact the sup-
plier.
Do not tap the LCD panel or other surfaces of the unit with a pointed
object such as a pencil, screwdriver, etc.
Take care that no conductive objects such as wire, metal scraps, conduc-
tive plastics etc. can get into the unit.

v
The product described in this manual is in conformity with the
following standards;
EN61326-1:2006/IEC 61326-1:2005
Electrical equipment for measurement control and laboratory
use.
RION Co., Ltd.
3-20-41 Higashimotomachi, Kokubunji, Tokyo 185-8533, Japan
RION Co., Ltd. Europe Representative Ofce Schaepmanlaan 66, 4623 XZ,
Bergen op Zoom, The Netherlands
To conform to the EU requirement of the Directive
on Waste Electrical and Electronic Equipment,
the symbol mark on the right is shown on the
instrument.
To ensure continued accuracy, have the unit checked and serviced at
regular intervals.
Dispose of the unit according to national and local regulations at the place
of use.

vi
Contents
FOR SAFETY........................................................................................ iii
Outline ....................................................................................................1
Controls and Functions ...........................................................................2
Front panel .........................................................................................2
Right side panel .................................................................................3
Left side panel ...................................................................................5
Rear panel ..........................................................................................6
Display panel .....................................................................................7
Outdoor Microphone MS-11 ............................................................10
Connections ..........................................................................................11
Using the All-Weather Windscreen WS-13 ......................................11
Microphone connection ...................................................................16
Mounting the All-Weather Windscreen WS-13 on a tripod ..............17
Mounting on All-Weather Windscreen Tripod ST-81 .................. 17
Mounting on All-Weather Windscreen Tripod ST-88 .................18
Power on/off switching (AC adapter connection) .............................21
Power on ....................................................................................21
Power off ....................................................................................21
Connection of AC/DC OUT connector ............................................22
Menu Setup ...........................................................................................23
Microphone integrated sound source setup ......................................23
Frequency weighting setup ..............................................................24
Time weighting setup .......................................................................25
AC/DC OUT setup ..........................................................................26
Windscreen correction setup screen .................................................27
Calibration and Operation Check ..........................................................28
Calibration with microphone integrated sound source .....................28
Atmospheric pressure correction ................................................29
Acoustic calibration with Sound Calibrator NC-74 ...........................30
Operation check with microphone integrated sound source .............32

vii
Measurement ...........................................................................................33
Measurement of time-weighted sound level Lp(instantaneous value) .33
Measurement of maximum time-weighted sound level Lmax ..............35
Connectors ..............................................................................................37
MIC. IN connector .............................................................................37
Rear-panel connector .........................................................................38
Wiring diagram ..................................................................................39
DC power supply ......................................................................... 40
Reset control ............................................................................... 40
Default Values .........................................................................................41
Technical Reference .................................................................................42
Microphone and Preamplier .............................................................42
Construction and Operation Principle............................................42
Thermal Characteristics ................................................................43
Humidity Characteristics...............................................................43
Preamplier.................................................................................. 44
Integrated sound source ............................................................... 44
Condensation-preventing heater ................................................... 44
Inuence of Microphone Extension Cable ..........................................45
Frequency Weighting Network........................................................... 46
RMS Detection Circuit and Time Weighting ......................................47
Inuence of Background Noise.......................................................... 50
Description for IEC 61672-1 ...............................................................51
IEC61672-1 (JIS C 1509-1) Frequency Response ...........................59
Reference incidence direction and reference point position ...........61
Frequency Response .....................................................................62
Effect of All-Weather Windscreen WS-13 ....................................62
The greatest susceptibility conguration for radio frequency elds ...... 64
Frequency response adjustment data for periodic test................... 64
The lower and upper limits of the linear operating range ............. 65
Directional Characteristics ........................................................... 66
Random incidence response correction......................................... 69
Statement of conforming to the basic statement............................ 69
Specications ..........................................................................................70

viii
Serial Interface
Transfer Format and Protocol ................................................................80
Transfer protocol .............................................................................80
Local Mode/Remote Mode ..............................................................80
Transfer codes ..................................................................................81
Transfer format ................................................................................82
Block reception processing .........................................................83
Communication cutoff .....................................................................88
Ratings ............................................................................................88
Commands .............................................................................................89
Command list ...................................................................................89
Command format .............................................................................90
Error codes ......................................................................................91
Command send example ..................................................................91
Command description ......................................................................92
Measurement parameter related commands ................................92
Calibration/operation check related commands ..........................95
Measurement data retrieval related commands ...........................96
Setting and information related commands ................................98
Example for control via external commands ....................................99