Extech Instruments 407706 User Manual Download Page 7

 

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 (781) 890-7440 for 

authorization. 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. 

Copyright 

©

 2000 Extech Instruments Corporation. 

All rights reserved including the right of reproduction 

in whole or in part in any form.

 

407760    V1.2   10/00 

Summary of Contents for 407706

Page 1: ...User s Manual Model 407706 Analog Sound Level Meter ...

Page 2: ...airports sound studios theaters auditoriums automobiles and in the home This precisely calibrated meter features a large easy to read analog indicator and is battery powered for portable use Specifications Ranges 50 to 126dB in 7ranges of 12dB referenced to 0 00002 bar Resolution Analog Continuous Accuracy 2 dB at 94 dB sound level Microphone type Condenser Electret Analog output AC 0 707Vrms full...

Page 3: ...o have the meter respond as the human ear would with regard to frequency response the human ear boosts and cuts amplitude over the frequency spectrum therefore it is not flat responding A weighting is used for environmental measurements OSHA regulatory testing law enforcement and workplace design Select C weighting for a flatter response measurement especially for lower frequencies C weighting is ...

Page 4: ...st accuracy always use the lower of any two possible settings For example If the RANGE is set to 80 dB and meter reads approx 5 reset the RANGE to 70 dB and the meter will read 3 for actual sound level of 73 dB Max Hold Maximum Hold permits the user to freeze the meter s maximum reading by locking the needle indicator at the sound level peak Press the Max button to activate Max Hold Press again to...

Page 5: ... output to a datalogger chart recorder etc for logging purposes Tripod Mount A threaded insert on the rear of the meter permits attachment to a tripod stand for increased stability and accuracy eliminates hand noise and minimizes the effects of sound reflected from the user s body Battery replacement Remove the battery compartment cover on the rear of the meter by removing the cover screw Replace ...

Page 6: ...ails on services available Extech recommends that calibration be performed on an annual basis to insure calibration integrity Typical A Weighted Sound Levels 50HP Siren 100 135db Speech 1 68dB Jet Takeoff 200 120dB Large store 62dB Riveting machine 110dB Large office 58dB Chain saw 100dB Residence 48dB Subway 20 90dB Night residential area 42dB Freight train 100 80dB Whisper 5 32dB Vacuum cleaner ...

Page 7: ...g 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 warrantiesor merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or con...

Reviews: