General Tools General Tools DSM20 Manual

USB DIGITAL SOUND

LEVEL DATA LOGGER

USER’S MANUAL

DSM20

Please read this manual carefully and thoroughly before using this product.

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TABLE OF CONTENTS

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 –3

Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

What’s in the Package . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Setup Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 –5

Install the Battery . . . . . . . . . . . . . . . . . . . . . 4 –5

Software, Drivers, Configuration . . . . . . . . . . . . . 5

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . 5 –6

Deploy the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Button Functions . . . . . . . . . . . . . . . . . . . . . . 5 –6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Maintenance Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . 7 –8

Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . . 8

INTRODUCTION

Thank you for purchasing General Tools & Instruments’
DSM20 USB Digital Sound Level Data Logger. Please read this
user’s manual carefully and thoroughly before using the
instrument.

The DSM20 is a low-cost, compact, battery-powered sound
level meter capable of unattended logging (recording) of the
decibel level of an environment for days, weeks or months.
Data logging can be started or stopped by pushing a button on
the unit, eliminating the need to bring a laptop to the job site.

Windows®7 and Windows®XP are registered trademarks of Microsoft Corporation.

After a data log has been captured and stored, it can be

®

uploaded as a .txt file to any PC running the Windows

®

Windows

XP operating system after plugging the DSM20 into

7 or

one of the computer’s USB ports. The DSM20’s internal flash
memory is large enough to store up to 32000 data points.

Included with the product—which is slightly larger than a
thumb drive—is a mini-disc with the drivers needed to
interface the unit to the computer, as well as software that
can display a data log file as a table or graph and/or export it
to Microsoft Excel. Exporting to Excel is recommended for
sophisticated trending and analysis of sound level data and
easy detection of unexpected excursions.

KEY FEATURES

• One button starts/stops data logging without a PC

• Plug-and-play USB 2.0 interface; no need for cables,
cradles or docks

• Large storage capacity offers the ability to track, store, and
download 32,000 data points into Excel-Format.

• LCD displays real time sound level

• A/C frequency weighting

• FAST/SLOW time weighting

• MAX/MIN/AVG displays

• High and low alarm limit, selectable sampling time

• Ability to analyze data in graph view using included
software and also print or save the results.

SAFETY INSTRUCTION

Do not use the DSM20 in the presence of flammable or
explosive gases.

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