Extech Instruments 407744 Manuale Utente
2 407744 & 407766-EN v5.3 1/14
Introduction
Congratulations on your purchase of Extech’s Sound Level Calibrator. Extech Calibrators
accommodate Sound Level Meters with a 0.5” microphone. The Calibrator’s die-cast aluminum
housing is built for ruggedness and durability. The 407744 provides a 94dB calibration output signal
while the 407766 provides both 94dB and 114dB outputs. This professional calibrator, with proper
care, will provide years of safe reliable service.
accommodate Sound Level Meters with a 0.5” microphone. The Calibrator’s die-cast aluminum
housing is built for ruggedness and durability. The 407744 provides a 94dB calibration output signal
while the 407766 provides both 94dB and 114dB outputs. This professional calibrator, with proper
care, will provide years of safe reliable service.
Description
Note that only the 407766 is pictured.
1. ½” Microphone adaptor
2. 407766:
OFF-94dB-114dB
switch
407744: OFF-BATTERY TEST-94dB switch
3. 407766: POWER-ON / LOW-BATTERY status LED
407744: BATTERY OK LED
4. Battery compartment cap
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