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User's Guide Digital Sound Level Meter MODEL 407736 • 1.5 dB accuracy meets ANSI and IEC 651 Type II standards • A/C weighting & Fast/Slow response • Built-in calibration check • 0.1dB resolution...
Introduction Congratulations on your purchase of the Extech Model 407736 Digital Sound Level Meter. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Meter Description Microphone LCD display POWER OFF & RANGE select switch RESPONSE &...
Meter Operation Quick Start 1. Power the meter by moving the RANGE switch to the LO or HI position. The meter will begin displaying sound levels. If the LCD does not display, check that the battery is good. 2. Place the meter on a tripod or hold the meter in hand facing the microphone toward the source of the sound to be measured.
Threshold of hearing Warranty EXTECH INSTRUMENTS CORPORATION (A FLIR COMPANY) warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext.
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