Model
407780
‐
EN
v2.3
1/14
2
Introduction
Congratulations on your purchase of the Extech 407780 Integrating Sound Level Meter. The
407780 with programmable integrating time provides precise linearity over a wide range (100dB)
and displays Leq, SEL, SPL, MAX-L, and MIN-L measurements. Response time (FAST, SLOW,
and IMPULSE) and frequency weighting (A and C) are programmable. The analog output (AC and
DC) can be used with headphones, chart recorders or other devices to store data. The 407780
with PC Interface and real-time calendar clock datalogs (stores) up to 32,000 readings for later
transfer to PC. Careful use of this meter will provide years of reliable service.
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