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BRUEL & KJAER 2204 User Manual

BRUEL & KJAER 2204
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Measurement
of
Vibration.
The
Precision
Sound
Level
Meter
Type
2203
fitted
with
the
Integrator
and
the
Octave
Filter
Set
Type
1613 is
an
excellent
tool
especially
for
on
site
vibration
control
and
other
investigations
where
portable
equipment
is re-
quired.
Using
a
Briiel
& Kjrer
accelerometer
and
a
small
fixing
magnet
(de-
livered
with
the
accelerometer)
measurements
are
carried
out
quickly
and
effectively
at
many
points
in
a
short
time.
Effects
of
changing
vibration
isolators,
speed
of
shaft
rotation
etc.
are
readily
found.
Addition
of
the
Filter
Set
makes
possible
a
frequency
analysis
of
the
vibration
which
is
of
great
help
when
corrective
measures
are
to
be
decided
upon,
as
the
type
of
for
example
a
vibration
isolator
to
be
used
depends
upon
the
frequency
of
the
vibration.
Input
1.
Acceleration
2. Velocity
3. Displacement
Fig.
4..3.
Circuit diagram for
the
Integrator
ZR
0020.
The
Integrator,
containing
two
stages
of
integration,
is designed
for
screwing
directly
onto
a B & K
Precision
Sound
Level Meter
Type
2203, effectively
converting
this
into
a
handy,
portable
vibration
meter,
capable
of
indicating
levels
of
acceleration,
velocity
and
displacement
when
an
acceleration
pick-up
·
is
employed
as
a
vibration
transducer.
A
slide
rule
is
delivered
with
the
Integrator
which
may
be
set
to
the
acceleration
pick-up
sensitivity
and
used
for
direct
conversion
of
dB-readings
to
units
of
vibration
(inetric
and
British).
Accelerometer
sensitivities
from
10
to
1ooo mV/g
are
covered.
The
components
of
the
RC
integrating
networks
have
been
chosen
to
give
a
low-frequency
cut-off
(-
3 dB
point)
at
about
5 Hz.
This
is
sufficiently
low,
since
the
Precision
Sound
Level
Meter
itself
has
a
low-frequency
cut-off
in
the
same
region.
The
high-frequency
limits
are
determined
by
the
ca-
pacitive
coupling
between
input
and
output
and
are
about
10
kHz
for
-
velocity
and
4
kHz
for
displacement
measurements.
These
ranges
are
·
sufficiently
large
for
the
majority
of
applications
.
Frequency
response
curves
.
for
the
Integrator
set
to
"Acceleration",
"Velocity"
and
"Displacement"
with
the
Precision
Sound
Level
Meter
as
indicator
are
given
in
Fig. 4.4.
23-

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BRUEL & KJAER 2204 Specifications

General IconGeneral
BrandBRUEL & KJAER
Model2204
CategoryMeasuring Instruments
LanguageEnglish

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