BSWA309 Sound Level Meters
BSWA 309 is 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.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).
| Single chip high speed ARM with FPU | USB port function implemented |
| White backlight LCD | Update firmware via USB (also power supply) |
| Integral period from 1s~24h | Timer feature support auto measurement |
| 0.1s, 0.2s, 0.5s logger step added | Internal GPS (option) with GPS timing |
| 5 templates to save user setting | Single range to cover 123dB dynamic range |
| B-weighting added to meet ANSI standard | Reduce the noise floor (only for Class 1) |
| Automatic power on with external supply, ease of integration | Upper limit of measurement: 136dBrms/139dBpeak (40mV/Pa) |
Product Features：
● Class 1 (New BSWA 308) and Class 2 (New 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 IEC61260-1:2014 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 parallelwith different frequency/time weighting. 14 custom define measurement
● Calculate SPL, LEQ, Max, Min, Peak, SD, SEL, E
● LN statistics and time history curve display
● User define 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
● Basic noise measurement
● Environmental noise assessment
● Product quality check
● Evaluation of noise reduction engineering
| Specification | |
|---|---|
| Type | BSWA 309 |
| Accuracy | Class 2 / Type 2 |
| Standard | GB/T 3785.1-2010, IEC 60651:1979, IEC 60804:2000, IEC 61672-1:2013, ANSI S1.4-1983, ANSI S1.43-1997 |
| Octave |
1/1 Octave, Centre Frequencies: 31.5Hz to 8kHz GB/T 3241-2010 Class 2, IEC 61260-1:2014 Class 2 ANSI S1.11-2004 Class 2 |
| Supplied Microphone | MPA309T: 1/2” prepolarized measurement microphone, Class 2. Sensitivity: 40mV/Pa. Frequency Range: 20Hz~12.5kHz. |
| Mic Interface | TNC connecter with ICCP power supply (4mA/24V) |
| Detector / Filter | Fully float-point digital signal processing (digital detector and filter） |
| Integral Period | 1s-24h user define integral period. Repeat time: infinite, 1~9999 |
| Measurement Functions | LXY(SPL), LXeq, LXYSD, LXSEL, LXE, LXYmax, LXYmin, LXPeak, LXN. Where X is the frequency weighting: A, B, C, Z; Y is time weighting: F, S, I; N is the statistical percentage: 1~99 |
| 24h Measurement | Automatic measurement and log the history data |
| Frequency Weighting | Parallel A, B, C, Z |
| Time Weighting | Parallel F, S, I and Peak detection |
| Self-noise | Sound: 20dB(A), 26dB(C), 31dB(Z) Electrical: 14dB(A), 19dB(C), 24dB(Z) |
| Upper Limit | 136dB(A) Increase to 154dB(A) with 5mV/Pa Microphone |
| Frequency Response | 20Hz~12.5kHz |
| Linearity Range | 25dB(A)~136dB(A) |
| Dynamic Range | 122dB (14dB(A)~136dB(A)) |
| Peak C Range | 47dB(A)~139dB(A) |
| Range Setting |
Single range to cover whole dynamic range |
| Resolution | 24Bits |
| Sampling Rate | 48kHz |
| Noise Curve | Time domain noise curve display. Duration time: 1min, 2min, 10min |
| LCD Display | 160x160 LCD with white backlight, 14 step contrast level |
| Mass Storage | 4G MicroSD card (TF card) |
| Post-processing | Post-processing software VA-SLM can read, analyze and generate reports of store data |
| Export Data | Directly connect to the computer to read the memory card (USB disk) |
| Output | AC (max 5VRMS output), DC (10mV/dB), RS-232 serial interface and USB virtual serial port |
| Alarm | User define alarm threshold. LED indicate the alarm status |
| Power Supply |
4x1.5V alkaline batteries (LR6/AA/AM3), sustainable use of approx.10 hours (depends on battery). It also can be supply by external DC power (7V~14V 500mA) and USB power (5V 1A) |
| RTC | Built-in backup battery has been calibrated at factory to the error <30s in 30days (<10ppm, (25±16)℃). It can keep RTC running when replacing the main batteries. GPS timing function available (option with GPS module) |
| Firmware Update | Update firmware via USB port |
| Conditions | Temperature: -10℃~ 50℃. Humidity: 20% ~ 90%RH |
| RT Temperature | Real-time temperature display on the main screen |
| Size (mm) | W70 x H300 x D36 |
| Weight | Approx. 620g, including 4 alkaline batteries |
| GPS（option） | Receiver Type: 50 Channels; Time-To-First-Fix: Cold Start 27s, Warm Start 27s, Hot Start 1s; Sensitivity: Tracking -161dBm, Reacquisition -160dBm, Cold Start -147dBm, Hot Start -156dBm; Horizontal position accuracy: 2.5m, Timing accuracy: 30ns, Velocity accuracy: 0.1m/s; Update Rate: 1Hz, Operation Limits: Dynamic≤4g, Altitude<50000m, Velocity<500m/s |
| Calibrator(option) | CA111, Class 1, 94dB/114dB, 1kHz |
| Printer(option) | Mini-needle or thermal printer, optional, RS-232 port |
Download：
Firmware_P0274.SLM.3.3.201214.F5
Download information:
BSWA308/BSWA309
