Calibration And Repair Services - Extech Instruments 407706 User Manual

Calibration and Repair Services

Extech offers complete repair and calibration services for all of the products we sell. For periodic
calibration, NIST certification or repair of any Extech product, call customer service for details on services
available. Ex tech recommends that calibration be performed on an annual basis to insure calibration
integrity.
Typical A Weighted Sound Levels
50HP Siren (100')
Jet Takeoff (200')
Riveting machine
Chain saw
Subway (20')
Freight train (100')
Vacuum cleaner (10')
135db Speech (1')
120dB Large store
110dB Large office
100dB Residence
90dB Night residential area
80dB Whisper (5')
72dB Sound studio
68dB
62dB
58dB
48dB
42dB
32dB
24dB