octave sound level meters updating the dual-core (DSP+ARM) architecture to single chip ARM with float point unit, and updating all fix-point calculation to float-point, which signif cantly improves the accuracy and stability. Re-design analog front end circuit also lower the noise fl oor and linear range of product.
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
1/1 Octave in accordance with IEC 61260-1:2014 and ANSI S1.11-2004
Linearity range: 20dBA~134dBA (BSWA 308), 25dBA~136dBA (BSWA 309)
Single range to cover 123dB/122dB dynamic range
Frequency weighting: A/B/C/Z. Time weighting: Fast/ Slow/Impulse
3 profile calculation in parallel with different frequency/ time weighting. 14 custom def ne measurement
Calculate SPL, LEQ, Max, Min, Peak, SD, SEL, E
LN statistics and time history curve display
User def ne integral period measurement, integral period up to 24h
High speed ARM core with FPU (Float Point Unit) to achieve wide frequency response, large dynamic range and low noise floor
4G MicroSD card (TF card) mass storage
RS-232 remote control port
Mini thermal printer for measurement data print
Internal GPS module (option), support GPS timing.
APPLICATION
Basic noise measurement
Environmental noise assessment
Product quality check
Evaluation of noise reduction engineering
