BRUEL & KJAER 2203 - Introduction; Precision Sound Level Meter Type 2203; Precision Sound Level Meter Standards

1. INTRODUCTION
1.1. PRECISION SOUND LEVEL METER TYPE 2203
The Bruel and Kjmr Precision Sound Level Meter Type 2203 is a com-
pact, portable instrument for precision sound and vibration measure-
ment. The 2203 meets the standards of IEC 179/1973 for Precision
Sound Level Meters.
Built into the 2203 are the A, B, and C weighting networks. Provision
is
also made for external filters such as the 1 613 (Octave) and 1 61 6
(Third Octave)
filters permitting truly portable analysis.
The 2203 is capable of sound measurements over a wide frequency
and dynamic range with the Condenser Microphone (4145) provided
with it. It accurately measures the RMS values of signals with crest fac-
tors up to 5. Slow and Fast meter dampings are provided according to
IEC 179. It can also be used for vibration measurements when fitted
with a suitable accelerometer.
Sound Level Meters Type 2203 from serial number 467152 are of a
new construction featuring generally improved gain stability with tem-
perature variation, lower output impedances, and a new expanded list of
accessories.
The
2203 is available with a wide range of accessories making it a
versatile, portable instrument.
1.2. PRECISION SOUND LEVEL METER STANDARDS
The IEC (International Electrotechnical Commission) has set various
standards
for sound level meters. IEC Publication 1 23 gives the require-
ments for general purpose Sound Level Meters which are made more
stringent in Publication 179 for Precision Sound Level Meters. The B & K
2203 meets or exceeds all requirements of IEC 1 79, the main points of
which are given below:
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