BRUEL & KJAER 2203 User Manual

well as a recorder output, for con -
nection of headphones, level record-
ers etc. are also provided . A built-
in reference voltage provides easy
electrical calibration of the instru-
ment. The sound level meter is pow-
ered from three standard 1, 5 volt
batteries giving 1 0 hours of continu-
ous operation. Longer operating
times can be obtained using alka-
line batteries or rechargeable NiCd-
cells. The battery condition can eas-
ily be checked on the meter.
Sound Measurements
As standard , the instrument is
equipped with a B & K high sensitiv-
ity, 1 / 2" diameter, free-field Con-
denser Microphone Type 4165, giv-
ing it a measuring range from 26 to
140 dB(A) and a wide frequency
range, both in free and diffuse
sound fields, due to its excellent om-
nidirectivity . The microphone is de-
livered with its own individual cali-
bration chart giving all relevant cali-
bration data and complete fre-
quency response curve.
The microphone may be mounted
directly on the instrument but
should normally be mounted on the
Extension Rod UA 0196, which is
included, and which, together with
the conical shaped front - end of the
instrument secures the omnidirE::c-
tional characteristics required to ful -
fil IEC, DIN and ANSI requirements
for precision sound level meters . If it
is desired to remove the micro-
phone even further from the instru -
ment, a 3 metre Extension Cable
AO 0128 is available. A wind-
screen is supplied with the instru-
ment and should be fitted over the
microphone when measuring out -
doors,
to reduce wind noise . Also in-
cluded is an input adaptor, to be fit -
ted
instead of the mic r ophone, al-
lowing direct electrical input , for in-
stance from an accelerometer for vi-
bration measurements, or from a
hydrophone for underwater sound
measurements.
The instrument can measure the
linear sound pressure level as well
as the standard frequency weighted
sound levels. Two meter response
times in accordance with the stan-
dard recommendation s can be
chosen.
Use with other Microphones. For
the measurement of higher levels
2
co
"0
+20
+10
c
A
5l 0
c:
0
~-10
.........
v---
-
~
-----
~
~
-
~
::::::::-.....
QJ
a:
~ -20
·;
~ -30
- 40
-50
- 60
v
/
/
v
v
/
/
/
v
- 70
10
2 5
/
...........
/
2 5 2 5
2
Frequency Hz
1 682 17
Fig . 1. Frequency response curves of the A. B and C weighting networks
and frequencies than is possible
with the 1 / 2" microphone Type
41
65, or if a linear , random inci-
dence microphone response is re-
quired, other 1 / 2" microphones
from the B & K range can be
used
directly, for instance Type
4133, 4134, 4163 or 4166. For
measurement of lower levels, the
1" microphones Type 4145 or
41 61 can be used . Adaptors DB
0962 and DB 0375 are available
for fitting these Microphones di-
rectly onto the input stage or onto
the extension rod respectively. In or-
der to fulfil the standard require-
ments to omnidirectivity, the 1" mic-
rophones require the use of a Ran-
dom Incidence Corrector UA 0055
instead of the normal mi crophone
protection grid. For special applica-
tions, the sound level meter can be
used
with other microphones than
described here and the Product
Data Sheet for the B & K micro-
phone range should be consulted.
See also survey of accessories avail-
able, on page 4 .
Vibration Measurements
When the microphone is replaced
by the Input Adaptor JJ 2614 (in-
cluded) and one of the B & K acceler-
ometers is connected, the instru-
ment functions as a vibration meter
indicating the acceleration level.
Connection of the Integrator ZR
0020 between the accelerometer
and Sound Level Meter permits
measurement of vibration velocity
and displacement as well as acceler-
ation . A calcu. lating disc delivered
with the Integrator makes conver-
Fig.2. The Integrator ZR 0020
Fig. 3. The sound level meter equipped with integrator and accelerometer for vibration measure -
ments and Octave Filter Set Type 1613 for frequency analysis

BRUEL & KJAER 2203 Specifications

General

Brand	BRUEL & KJAER
Model	2203
Category	Measuring Instruments
Language	English