407790A-en-US_v2.0 8/16
5
1.2
Features
The
Sound
Level
Meter
complies
with
the
requirements
of
IEC
61672
‐
1:2003
standard
for
a
Class
2
instrument.
See
specifications
section
for
more
applicable
standards
that
apply
to
this
meter.
1/1
octave
band
analysis
from
31.5Hz
to
8kHz
1/3
octave
band
analysis
from
25Hz
to
10kHZ
Can
perform
1/1
and
1/3
octave
band
analysis
simultaneously
4GB
Micro
SD
card
USB
interface
Datalogging
function
AC/DC
signal
output
available
for
level
and
graphic
recorder
Comparator
output
function
External
trigger
input
function
Real
time
clock
with
calendar
Main
channel
(sound
meter,
analyzer
mode)
Sub
Channel
(sound
level
meter
mode)
The
407790A
allows
the
following
quantity
measurements.
Simultaneous
measurements
of
all
items
with
selected
time
weighting
and
frequency
characteristics.
Sound
level
Lp
Equivalent
continuous
sound
Leg
Sound
exposure
level
SEL
Maximum
sound
level
Lmax
Minimum
sound
level
Lmin
Percentile
sound
level
L
N
(L05,
L50,
L90,
L95)
calculated
from
Lp
Frequency
rating
A,
C,
Z
Time
weighting
Main
Channel
Fast,
Slow,
10ms,
impulse
Sub
Channel
Fast,
Slow,
10ms,
impulse
Safety
Symbol:
Complies
with
EMC
