BSWA 309 - 3. Measurement Screen

BSWA 308/309 BSWA Technology Co., Ltd
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1. Introduction
1.1 General Description
The new BSWA 308/309 are new generation octave sound level meter upgrade from base
BSWA 308/309 to meet the market demand. It fulfill the 1/1 octave and 1/3 octave
requirement of IEC standard and China GB/T standard.
The BSWA 308/309 is a digital sound level meter which design and manufacture by BSWA.
The use of high precision 24 Bits AD converter makes the instruments to be an ideal choice
for performing many kinds of measurement, for example, environmental noise, vehicle noise
and industrial application.
The new types upgrade the dual-core (DSP+ARM) architecture to single chip ARM with float
point unit, and update all fix-point calculation to float-point which significantly improves the
accuracy and stability. Re-design analog front end circuit also lower the noise floor and linear
range of product. The new developed algorithm brings a single measurement range which
can cover more than 120dB dynamic range while still meets the standard.
BSWA 308 is Class 1 and BSWA 309 is Class 2. Both instruments have certificated by the
China CPA (Certification of Pattern Approval) and CMC (China Metrology Certification).
1.2 Applications
 Basic noise measurement
 Environmental noise assessment
 Product quality check
 Evaluation of noise reduction engineering
1.3 Features
 Class 1 (BSWA 308) and Class 2 (BSWA 309)
sound level meter
 Comply with IEC 61672-1:2013, ANSI S1.4-1983 and ANSI S1.43-1997
 Real-time 1/1 and 1/3 Octave in accordance with IEC 61260-1:2014 and ANSI S1.11-2004
 Linearity range: 22dBA~136dBA (BSWA 308), 25dBA~136dBA (BSWA 309)
 Single range to cover 123dB (BSWA 308) / 122dB (BSWA 309) dynamic range