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BRUEL & KJAER 2225 - Page 7

BRUEL & KJAER 2225
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Robustly
constructed
in a compact
case,
the
types
2225
and
2226
are
go
-
anywhere
instruments
.
Light
in
weight,
but
full
of
facilities
for·
easy
comprehensive
A-
weighted
measure-
ment
of
commun
i
ty
or .
industrial
noise.
The
short
-
term
(60
second)
leq
meas
-
urement,
used on
fluctuating
signals,
eliminates
the
errors
inherent
in
aver-
aging by eye and can
also be used
to
obtain
SEL(LAX ).
"Slow
" , "
Fast"
and
"
Peak"
hold
(with
a
30
J.JS
rise
time)
are
featured
on
the
2225.
"Slow",
"Fast"
and "
Impulse
" all
with
"Max
.
hold"
of t
he
displayed level on
the
2226
.
Easi
ly
read "
thermometer
" display,
automatic
rese"t, and
many
other
fea-
tures
which
enable
the
operator
to
make valid and accurate
measure
-
ments
after
a
minimum
of
training
.
DC
output
of
all
functions
continu
-
ously
to
a level recorder.
FEATURES:
•
Sturdy,
compact
design
(weight
only
370
g)
•
Short-term
(one
minute)
Leq
with
up
to
50
dB
crest
fac
t
or
•
Simple
conversion
to
SEL(LAx)
•
Fulfils
IEC
651
Type
2*,
DIN
45
634
and
ANSI
S
1 , 4 - 1 9 7 1 , Type S
2A
•
25
dB(A)
to
140
dB(A) peak
measuring
range
•
"Slow
"
and
"Fast"
time
constants
with
up
to
40
dB
crest
factor
•
A -
weighted
max-hold
peak
detecto
r
(2225
only)
*
excep
t for "
Max
. hold" on
2225
19-12
1
Integrating
Sound
Level
Meter
type
2225
Integrating
Impulse
Sound
Level
Meter
type
2226
1i\
\,
•
Integ
r
ating
Sound
Level M eter
dBI" J
I
I
d8(
AJ
I
-~
Ill
-~
-
-
-
-
-
-
-::
-
-
-
-
-
-
e
·
-=
A
....
e
·
-=
R
eNt
(B
en)
(B
•ttJ
-
-
:
-
-
-::
-
-
-
-
e
-
·-=
.2!l.
-
e
·
-=
.2!l.
-
O
ff
Off
-
-
-
-
-
}
·-
-
-
-
}·-
-
-
-
-
·
-=
-
·
-=
-
-
-
-
-
-
-
-
-
-
-
-
-
m.;
-
m.;
BrUel & Kjoor
~
Type
2225
t
~
Type2226
•
A-weighted
impulse
USES:
detector
(2226
only)
•
Community
and
Industrial
•
40
dB
"thermometer
"
noise
surveys
display
with
0,5
dB
•
Determination
of
Leq
for
resolution
evaluation
of
noise
•
Readable
even
in
direct
annoyance
or
hearing
loss
sunlight
risk
•
Equipped
with
robust
•
Measurements
of
non
-
B & K
Prepolarized
steady
noise
Condenser
Microphone
•
Determination
of
Sound
•
Built
in
A-weighting
Exposure
Level,
SEL(LAX)
network
•
Assessment
of
the
harmful
•
Easy
one
handed
operation
effects
of
impact
noise
•
DC
output
of
all
functions
(2225
only)
to
a level
recorder
•
Assessment
of
the
•
Automatic
reset
and
loudness
of
impulsive
switch
-
off
noise
(2226
only)
•
"
Max.
hold"available
on
•
Measurement
of
maximum
all
functions
(2226
only)
levels
(2226
only)

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