Model 407738 Version 2.2 September 2005
8
Typical A-Weighted Sound Levels
50HP Siren (100')
130
120
110
100
90
80
70
60
50
40
30
20
10
140
0
Jet takeoff (200')
dBA
Riveting machine
Chain saw
Subway (20')
Boiler room
Pneumatic drill (50')
Freight train (100')
Vacuum cleaner (10')
Speech (1')
Large store
Large Office
Small office
Residence
Night residential area
Whisper (5'0)
Sound studio
Threshold of hearing
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 to 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 (781) 890-7440 ext. 210 for authorization or visit our website
www.extech.com for contact information. 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.
Copyright
©
2005 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any form.
