Manual
BATTERY INSTALLATION AND REPLACEMENT 
• Replace the battery if the Power Indicator (3) does 
NOT light when 94dB/114dB/Off Slide Switch (4) 
is in the 94 dB or 114 dB position and/or when there 
is no audible tone. 
• Unscrew the Battery Compartment Ring (5). 
• There are wires connected to the Battery Compart-
ment (6), so SLOWLY lift the center to access the 
battery. 
• Insert a fresh 9V Alkaline battery. 
• Replace the Battery Compartment (6) and tighten 
the Battery Compartment Ring (5). 
• A fresh Alkaline battery should power your calibrator 
for approximately 20 hours of use.  
• Remove the battery if the calibrator will not be in 
use for a long period of time. 
• Tampering with the internal circuitry will void your 
warranty. 






