BSWA - Model 309 -Sound Level Meter

• 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
• Real-time 1/1 and 1/3 Octave in accordance with IEC61260-1:2014 and ANSI S1.11-2004
• Linearity range: 22dBA~136dBA (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

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)

• Basic noise measurement
• Environmental noise assessment
• Product quality check
• Evaluation of noise reduction engineering

• Specification:
• Type: NEW BSWA 309
• Accuracy: Class 2 / Type 2
• Standard: GB/T3785.1-2010, GB/T3785.2-2010, IEC60651:1979, IEC60804:2000, IEC61672-1:2013, ANSI S1.4-1983, ANSI S1.43-1997
• Octave: Real-time 1/1 Octave: 20Hz~8kHz Optional Real-time 1/3 Octave: 20Hz~12.5kHz GB/T 3241-2010, IEC 61260-1:2014 ANSI S1.11-2004. Base 10 system
• 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: All 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 (It can also be applied to 1/1 and 1/3 Octave)
• 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
• Resolution: 24Bits
• Sampling Rate: 48kHz(Sampling interval for LN: 20ms)
• 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 more than 10 hours. 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?C). 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 thermal printer, RS-232 port