Amprobe SM-10, SM-20 Users Manual

Users Manual

Mode d’emploi•
Bedienungshandbuch•
Manuale d’Uso•
Manual de uso•
Användarhandbok•

SM-10
SM-20

Sound Level Meters

SM-10 / SM-20

Sound Level Meters

Users Manual

SM10_Rev001
© 2008 Amprobe Test Tools.
All rights reserved.

English

1

Limited Warranty and Limitation of Liability

Your Amprobe produc t will be free from defects in material and workmanship for
1 year from the date of purchase. This warranty does not cover fuses, disposable
batteries or damage from accident , neglect, misuse, alteration, contamination,
or abnormal conditions of operation or handling. Resellers are not authorized
to extend any other warranty on Ampro be’s behalf. To obtain service during the
warrant y period, return the product with proof of purchase to an authorized
Amprob e Test Tools Service Ce nter or to an A mprobe dealer or distributor. See
Repair Section for details. THIS WARRANTY IS YOU R ONLY REMEDY. ALL OTHER
WARRANTIES - WHETHER E XPRESS, IMPLIED OR STAUTORY - INCLUDING IMPLIED
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY,
ARE HEREBY DISCL AIMED. MANUFACTURER SHALL NOT BE LIABLE FO R ANY
SPECIAL, INDIRECT, INC IDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES,
ARISING FROM ANY CAUSE OR THEORY. Since some states or countries do not
allow the exclusion or limitation of an implied warranty or of incidental or
consequential damages , this limitation of liability may not apply to you.

Repair

All test tools returned for warranty or non-warranty repair or for calibration
should be accompanied by the following: your name, company’s name, address,
telephone number, and proof of purchas e. Additionally, please include a brief
description of the problem or the ser vice requested and include the test leads
with the meter. Non- warrant y repair or replacement charges should be remitted
in the form of a check, a money order, credit card with expiration date, or a
purchase order made payable to Amprobe® Test Tools.

In-Warranty Repairs and Replacement – All Countries

Please read the warranty st atement and check your battery before requesting
repair. During the warranty period any defective test tool can be returned to your
Amprob e® Test Tools di stributor for an exchange for the same or like product.
Please check the “Where to Buy” sec tion on www.amprobe.com for a list of
distributors near you. Additionally, in the United States and Canada In-Warranty
repair and replacement units can also be sent to a Amprobe® Test Tools Service
Center ( see address below).

Non-Warranty Repairs and Replacement – US and Canada

Non-warranty repairs in the Unite d States and Canada should be sent to a
Amprob e® Test Tools Service Center. Call A mprobe® Test Tools or inquire at your
point of purchase for current repair and replacement rates.

In USA In Canada

Amprobe Test Tools Amprobe Test Tools
Everett, WA 98203 Mississauga, ON L4Z 1X9
Tel: 877-AMPROBE (267-7623) Tel: [phone]

Non-Warranty Repairs and Replacement – Europe

European non-warranty units can b e replaced by your Amprobe® Test Tools
distributor for a nominal charge. Plea se check the “Whe re to Buy” section o n
www.amprobe.com for a list of distributors near you.

European Correspondence Address*

Amprobe
In den Engematten 14
79286 Glotter tal, Germany
Tel.: +49 (0 ) 7684 8009 - 0

*(Correspondence only – no repair or replacement available from this address.
European customers plea se contact your distribu tor.)

®

Test Tools Europe

2

REC

HOLD

+

MAX

FAST
SLOW

A / C

Fast Slow

HOLD MAX dBA

MIN dBCN

1

2

3

4

5

6

7

8

9

10

HOLD

+

MAX

FAST
SLOW

A / C

Fast Slow

HOLD MAX dBA

MIN dBCN

3

4

5

6

7

8

9

1

2

SM-10 SM-20

➊ Windscreen

Microphone

➋

LCD display

➌

Frequency weighting select button

➍

Maximum/Minimum Hold button

➎

Power button

➏

Backlight button

➐

Time weighting select button

➑

Data Hold button

➒

Record button

➓

3

SM-10 / SM-20

Sound Level Meters

CONTENTS

Symbols .................................................................................................................5

Unpacking and Inspection ...................................................................................5

Introduction ..........................................................................................................5

Operation .............................................................................................................5

MAX/MIN ......................................................................................................... 6

HOLD ...............................................................................................................6

Backlight ..........................................................................................................6

Record (SM-20 Only) .......................................................................................6

Calibration Procedures ..................................................................................6

Specifications ........................................................................................................ 7

Maintenance and Repair ....................................................................................8

Battery Replacement .....................................................................................8

4

SYMBOLS

Refer to the manual



Conforms to relevant



Australian standards.

Do not dispose of this
product as unsorted



municipal waste.

Complies with EU



directives

 Warning and Precautions

For wind speeds over 10 m/sec (22.3 mph), use the windscreen on the •
microphone.

For general sound level measurements use A weighting. For checking the •
low-frequency content of noise use C weighting. If the C-Weighted level
is much higher than the A-weighted level, then there is a large amount of
low-frequency noise

For normal measurements use the FAST mode. For checking average level •
of fluctuation noise use the SLOW mode.

UNPACKING AND INSPECTION

Your shipping carton should include:

1 SM-10 / 20 sound level meter
1 9 volt battery
1 Download Suite CD-ROM (SM-20)
1 RS-232 to mini stereo phono jack (SM-20)
1 Users Manual

If any of the items are damaged or missing, return the complete package to
the place of purchase for an exchange.

INTRODUCTION

This Sound Level Meter has been designed to meet the measurement
requirements of safety Engineers, Health, Industrial safety offices and quality
control in various environments. This unit conforms to the IEC651 Type 2,
ANSI S1.4 Type 2, JISC1502 requirements for Sound Level Meters.

OPERATION

Press 1.  button for power ON.
Select the desired response time and weighting. If the sound source 2.

consists of short bursts or only catching sound peak, set response to FAST.
To measure average sound level, use the slow setting. Select A weighting
for general noise sound level and C weighting for measuring sound level
of acoustic material.

5

Hold the instrument comfortably in hand or fix on tripod and point the 3.
microphone at the suspected noise source, the sound pressure level will
be displayed.

MAX/MIN

The MAX MIN feature reads and updates the display to show the maximum
or minimum average value measured after you press the MAX MIN button.
Pressing the MAX MIN button for less than 1 second will put the meter into
a mode of displaying the maximum, minimum, average, or actual readings.
Each time the button is pressed, the meter will alternate between MAX
and MIN. Press the MAX MIN button for more than 2 seconds to disable this
feature.

HOLD

Freezes the reading present on the LCD at the moment the button is pressed.
To use this button feature set up the meter for the type of measurement and
range desired before pressing the button.

Backlight

Press the button you enable the display backlight to easy readings in dark
environments. Press more than 1 second to disable backlight, which however
it automatically OFF after 15 seconds.

Record (SM-20 Only)

Refer to CD-ROM for Download Suite
To transfer the data from the instrument to the PC the following procedure

must be followed:

TM

instructions .

Switch ON the instrument1.
Connect the serial output of the instrument to the serial output of the PC 2.

through the serial cable
Press the REC button on the SM-20.3.
Install the software and start it – Close the introduction window4.
Press F2 and follow the commands.5.
Refer to software help file for further instructions.6.

Calibration Procedures

Using a standard Acoustic Calibrator (SM-CAL1) (94dB, 1 kHz Sine wave)

Set meter for dBA and FAST. 1.
Insert the Microphone nozzle carefully into the insertion hole of the 2.

calibrator.
Press A/C button then press the HOLD button, hold the 2 buttons at 3.

the same time more than 1 second. LCD will be blinking to confirm
calibration.

6

When LCD blinked, release the A/C and the HOLD buttons. The sound level 4.
meter will display 94.0 dBA . The calibration is done.

The 94 dB calibration process can be repeated until the meter reads 94.0 5.
dB. Recalibration cycle: 1 year.

SPECIFICATIONS
General

Display: 4 digits LCD
Microphone: 1/2 inch Electret condenser microphone.
Low Battery Indication: Replace battery when LCD displays “”.
Power Supply: 9V NEDA 1604, IEC 6F22, JIS 006P battery.
Power Life : Approx. 50 hrs (alkaline Battery).
Auto Power Off: Approx. 5 min
Environment: Indoor operation, < 2000 m
Temperature / Humidity

Operation: 5 °C to 40 °C (41°F to 104°F); < 80% RH
Storage: -10 °C to 60 °C (14°F to 140°F); < 70 %RH
Dimension: 200 x 55 x 38 mm (7.8 x 2.2 x 1.5 in)
Weight: 233g. (0.5 lb.) Including battery

-EMC: EN61326-1 This product complies with requirements of the

following European Community Directives: 89/336/EEC (Electromagnetic
Compatibility) and 73/23/EEC (Low Voltage) as amended by 93/68/EEC (CE
Marking). However, electrical noise or intense electromagnetic fields in the
vicinity of the equipment may disturb the measurement circuit. Measuring
instruments will also respond to unwanted signals that may be present within
the measurement circuit. Users should exercise care and take appropriate
precautions to avoid misleading results when making measurements in the
presence of electronic interference.

Electrical (Audio)

Standard applied: IEC 651 Type2, ANSI 1.4 Type 2.
Dynamic range: 50 dB.
Resolution: 0.1 dB, Display Update: 0.5 sec.
Time weighting: FAST(125mS), SLOW(1 sec).
Frequency range: 31.5 Hz to 8 kHz.
Measuring level range: (Auto Range)
A Weighting: 30 to 130 dB.
C Weighting: 35 to 130 dB.
Accuracy: ± 1.5 dB.
Calibration cycle: 1 year.

7

MAINTENANCE AND REPAIR

OPEN

If there appears to be a malfunction during the operation of the meter, the
following steps should be performed in order to isolate the cause of the
problem.

Check the battery. Replace the battery immediately when the symbol 1.
“” appears on the LCD.

Review the operating instructions for possible mistakes in operating 2.
procedure.

Except for the replacement of the battery, repair of the meter should be
performed only by a Factory Authorized Service Center or by other qualified
instrument service personnel. The front panel and case can be cleaned with
a mild solution of detergent and water. Apply sparingly with a soft cloth and
allow to dry completely before using. Do not use aromatic hydrocarbons or
chlorinated solvents for cleaning.

Battery Replacement

Turn off the meter and slide out the battery cover. Replace the battery 1.
with a NEDA type 1604 or equivalent 9V alkaline battery. Replace the
cover.

Remove battery when the SM-10/SM-20 is not used for extended period.2.

Battery Replacement

8