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User's Guide 

 
 
 

Digital Sound Level Meter 
Model 407735 

 
 
 
 

 
 

 

 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Introduction 

Congratulations on your purchase of the Extech Model 407735 Digital Sound Level Meter. 
This professional meter, with proper care, will provide years of safe reliable service. 
 

 

Summary of Contents for 407735

Page 1: ...tal Sound Level Meter Model 407735 Introduction Congratulations on your purchase of the Extech Model 407735 Digital Sound Level Meter This professional meter with proper care will provide years of safe reliable service ...

Page 2: ...ity 10 to 90 RH Dimensions weight 9 45 x 2 68 x 1 240 x 68 x 25mm 6 75oz 210g Meter Description 1 Microphone 2 LCD display 3 POWER OFF RANGE select switch 4 RESPONSE HOLD select switch 5 A C weighting and Calibration switch 6 Calibration adjust screw for 94dB 7 Reset key resets max hold reading 8 AC DC analog output 3 5mm phone jack 9 Battery compartment and Tripod mount are located on back of met...

Page 3: ...y directives or standards will dictate which response to select For example most hearing conservation or OSHA related testing is done using SLOW mode and A weighting MAX HOLD In this mode the meter only updates the LCD when a higher reading than the one presently on the display is detected Select MAX HOLD using the RESPONSE switch The LCD shows MAX HOLD in this mode Press RESET to reset the MAX HO...

Page 4: ...r 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 imp...

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