Battery Replacement - Extech Instruments 407736 User Manual

Battery Replacement

When the low battery message appears on the LCD replace the 9V battery as soon as possible.
The battery compartment cover resides at the bottom, rear of the meter. Slide the battery
compartment cover off, change the battery, and replace the compartment cover.
Never dispose of used batteries or rechargeable batteries in household waste.
As consumers, users are legally required to take used batteries to appropriate collection sites, the
retail store where the batteries were purchased, or wherever batteries are sold.
Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-
of-life devices to a designated collection point for the disposal of electrical and electronic
equipment.
Typical 'A' weighted Sound Pressure Levels
50HP Siren (100')
Jet takeoff (200')
Riveting machine
Subway (20')
Pneumatic drill (50')
Vacuum cleaner (10')
Large store
Small office
Night residential area
Whisper (5'0)
Threshold of hearing
dBA
140
130
120
110
100 Chain saw
90
Boiler room
80
Freight train (100')
70
Speech (1')
60
Large Office
50
Residence
40
30
Sound studio
20
10
0
4
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