Extech Instruments 407727 User Manual

Battery replacement
Remove the battery compartment cover on the rear of the meter by removing the cover screw. Replace 9V
battery and compartment cover.
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 (10’) 72dB Sound studio 24dB

Extech Instruments 407727 Specifications

General

Brand	Extech Instruments
Model	407727
Category	Measuring Instruments
Language	English