type
2230
Precision Integrating Sound Level Meter
USES:
FEATURES:
• Measurement
of
Sound Pressure Level (SPL)
•
RMS
and Peak detector modes
• Determination of
Leq
for assessment of hearing
• Impulse, Fast and Slow time weightings
loss risk or noise annoyance.
• Fulfils IEC
804
Type
1,
and relevant sections of
• Measurement
of
cyclical machine noise
IEC
651
Type
11,
and
ANSI
S1.4.1971
Type 1
• Determination of Sound Exposure Level
(LEA,r)
• Digital and quasi-analogue liquid crystal display
•
Measurement
of
Max. and Min. noise levels
•
73
dB Pulse range;
70
dB Linearity range
• Spatial averaging of machine noise
• Sound power level measurements according to
survey method
•
24
to
130
dB measuring range
(30
to
150
dB with
attenuator)
in
6 overlapping sub-ranges
•
A,
C,
Lin. and All-pass weightings
• Octave or 1f3 octave frequency analysis with filters
Types
1624
and 1625
The
Precision Integrating Sound Lev-
el
Meter Type 2230 is a Type 1 preci-
sion instrument. Its comprehensive con-
struction
and
versatility make
it
ideal
for all kinds of sound level measure-
ments including octave
and
l/3
octave
frequency analysis using a snap-on filter
set.
The
Type 2230 carries out five mea-
surements in parallel:
SPL, Max., Min.,
L
eq
and L
EA,T•
all
of
which can be ob-
tained
for
the
same signal. A choice be-
tween 2 detector modes
(RMS
and
Peak), 3 time weightings (Slow, Fast,
Impulse), 4 frequency weightings
(A,
C,
Lin and All pass)
is
available for
the
measurements.
A partial (Max./Min.) reset, a
total
reset
and
a pause function increase
the
usefulness of
the
instrument. A linear
free or a linear diffuse field frequency
response is obtained by electronic fre-
quency weighting for measurements in
accordance with IEC or
ANSI stan-
dards.
The
measurements are displayed with
0,1
dB resolution on a large 4 digit liq-
uid crystal display.
The
SPL
is continu-
ously monitored on a quasi-analogue
60
dB scale. Indications of overload, de-
pleted batteries
and
illegal settings are
also displayed.
AC
and DC
outputs
allow
chart
or
tape
recordings
and
audio monitoring
of
the
SPL
with
the
selected frequency
weighting.
Despite its Type 1 performance
and
the
numerous functions included,
the
Type
2230 is
37
em long
and
weighs less
than
1
kg.
It
is easily held in one hand,
even when the Filter
Set is connected.
BP0102-15
The
Precision
Integrating
Sound
Level
Meter
Type
2230 complies
with
the
IEC
804
Type
1
and
IEC
651
Type
1 I
and
ANSI
Sl.4.1971
Type
1
stan-
dards.
In
addition
to offering
Type
1 preci-
sion,
the
main
characteristic
of
the
Type
2230 is versatility.
Functions
normally requiring several
instru-
ments
have been
included
in
this
sin-
gle
hand-
held
Sound
Level Meter.
The
principle of
the
Type
2230,
sampling
of
the
detector
output
fol-
lowed by analogue
to
digital conver-
sion
and
processing by microproces-
sor, enables
it
to
carry
out
five mea-
surements:
SPL,
Min., Max., L
eq
and
LEA
T·
As all five
measurements
are
made
in
parallel,
the
five values
can
be
read
successively for
the
same signal.
Min.
and
Max.
can
be
reset
without
resetting
the
other
measurement
val-
ues.
Leq
and
LEA
,T
measurements
must
be
carried
out
in
"RMS"
mode
with
a
Fast
time
weighting. All
other
mea-
surements
can
be
carried
out
in
either
"RMS"
mode with "Slow",
"Fast"
or
"Impulse"
time
weightings, or
"Peak"
mode. All
these
measurements,
with
the
various
time
weightings
and
detec-
tor
modes,
can
be
made
in
accordance
with
either
IEC
or
ANSI
standards,
i.e.
with
either
a
linear
free field
or
a
linear diffuse field frequency response
for
the
microphone.
The
change
in
fre-
-
,.,.
...........
_
...
_
'*"""
f§
1
Oft
.....
-Oft
,,
....
.. -
It
c.
U....r'\l.H\
,
F~
·
~l'*#
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