407735 Datasheet, PDF (4/4 Pages) Extech Instruments Corporation. – Digital Sound Level Meter

Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and
workmanship for one year from date of shipment (a six month limited warranty applies on sensors and
cables). If it should become necessary to return the instrument for service during or beyond the warranty
period, contact the Customer Service Department at [phone] ext. 210 for authorization or visit our
website at www.extech.com (click on ‘Contact Extech’ and go to ‘Service Department’ to request an RA
number). A Return Authorization (RA) number must be issued before any product is returned to Extech. The
sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in
transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper
wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification.
Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and
will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited
to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty,
whether written or oral, is expressed or implied.
Calibration and Repair Services
Extech offers repair and calibration services for the products we sell. Extech also provides NIST certification for
most products. Call the Customer Service Department for information on calibration services available for this
product. Extech recommends that annual calibrations be performed to verify meter performance and accuracy.
Support Hotline [phone]
Tech support: Ext. 200; Email: [e-mail]
Repair/Returns: Ext. 210; Email: [e-mail]
Website: www.extech.com
Typical “A” Weighted Sound Pressure Levels
50HP Siren (100')
Jet takeoff (200')
Riveting machine
Subway (20')
Pneumatic drill (50')
Vacuum cleaner (10')
Large store
Small office
Night residential area
Whisper (5'0)
Threshold of hearing
dBA
140
130
120
110
100 Chain saw
90 _{Boiler room}
80 _{Freight train (100')}
70 _{Speech (1')}
60 _{Large Office}
50 _Residence
40
30
20 ^{Sound studio}
10
0
Copyright © 2003 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any form.
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407735 Ver. 2.1 04/2006