Larson Davis 831-INT Noise Monitoring Station - Sound Level Meter, Noise Analyzer, and Data Acquisition Station

Larson Davis 831-INT Noise Monitoring Station - The LD 831-INT device combines the capabilities of a Class 1 precision sound level meter, remote controllable and high-capacity data logger, and real-time noise analyzer in a compact, user-friendly measuring station, with data retrieval/remote control via USB, analog modem, or GPRS.

Among its special features are: replayable audio and sound recording, multiple communication options (including GPRS), real-time 1/1 and 1/3 octave analysis ... In the time trend recording mode, the instrument stores 6 sets of Lns, RTA Leq, RTA Max, or RTA Min spectral data in each time interval (ANY LEVEL^TM function).

Additional user-friendly features include: backlit graphical display and keyboard, Windows-based PC software (optional) for instrument setup, data download, evaluation, and export to spreadsheet software. Optionally, weather parameters (wind speed, wind direction, temperature, humidity) can also be measured/recorded with the LD 831-INT station.

• Environmental noise measurement
• Airport noise monitoring
• Industrial noise emission checks
• Research and development measurements

• Class 1 precision integrating sound level meter and real-time noise analyzer with octave analysis
• Compliance (standards):
  • ANSI S1.4-1983 (R2006) Type 1
  • ANSI S1.11-2004 Class 1
  • ANSI S1.25-1991 Class 1
  • ANSI S1.43-1997 (R2007) Type 1
  • IEC60651 (2001) Class 1, Group X
  • IEC60804 (2000) Type 1, Group X
  • IEC61252 (2002) Type 1
  • IEC61260 (2001) Class 0, Group X
  • IEC61672-1 (2002) Class 1, Group X
• Dynamic range: 120 dB
• Long-term data logging capabilities: Noise level trend and analysis Automatic data logging (20 ms ... 24 hours) 2-channel dosimeter function
• Memory: 250 MB (option: 2 GB)
• Measurements/display: Equivalent and peak Ln statistics and histogram
• Detection: fast, slow, impulse, and peak (simultaneous)
• Real-time filters: 1/1 octave (8 Hz ...16 kHz), 1/3 octave (6.3 Hz ... 20 kHz)
• Integration: linear or exponential (fast, slow, or impulse)
• Weighting: A, C, and Z frequency filter characteristics
• Noise and sound recording with playback
• Output: AC/DC, parameterizable
• USB 2.0 connector (4 ports)
• Interface (options): RS-232, modem, or GPRS remote query/remote control via GPRS or modem
• Power supply: 100 ... 240 V AC or 12 ... 30 V DC
• Temperature range: -40 ... 70°C
• Windows software (optional): configuration, remote control, data transfer