Extech Instruments 407780A User Manual page 2

Introduction
Thank you for selecting the Extech Instruments Model 407780A. This device is shipped fully tested
and calibrated and, with proper use, will provide years of reliable service. Please visit our website
(www.extech.com) to check for the latest version of this User Guide, Product Updates, and
Customer Support.
Features
The Sound Level Meter complies with the requirements of IEC 61672‐1:2003 standard for a
Class 2 instrument.
The instrument contains several features which permit sound level measurements under a
variety of conditions.
Features include:

Five measurement ranges

Fast, Slow and Impulse time weighting settings

A and C frequency weighting settings

Storage of up to 32000 measurement records

USB serial port for downloading records to a computer or real time analysis

AC/DC signal outputs are available from a single standard 3.5mm coaxial socket suitable
for use with a frequency analyzer, level recorder, FFT analyzer, graphic recorder, etc.

Leq, SEL, SPL MAX, SPL MIN, PH (Peak Hold), L05, L10, L50, L90, and L95, ten measured
parameters are monitored during measurement

Preset measurement time

Sound level alarm output connector
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2
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