Larson Davis 831 Class 1 Sound Level Meter

Rent Larson Davis 831 Class 1 Sound Level Meter
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Brochure
This versatile instrument, with high definition display, performs the functions of several instruments. It puts the combined features of a precision Class 1 sound level meter, environmental noise analyzer, personal noise dosimeter, and a real-time frequency analyzer in the palm of your hand. The Larson Davis Model 831 is a fifth generation Larson Davis sound level meter, designed for simple single handed operation, yet is fully featured, smart and versatile with an ever expanding firmware platform.

Features:

  • IEC 61672-1:2002, ANSI S1.4, ANSI S1.43 Class 1 integrating sound level meter
  • Voice Annotation
  • ANY LEVEL Display
  • User programmable run modes
  • Six user selectable statistics (Ln)
  • Threshold exceedance data
  • Community Noise Calculations (Lden, CNEL)
  • GPS Global Positioning Support
  • Back Erase Functionality
  • Normalized Spectrum
  • User-selectable screen layout and lockable setup protection
  • Remote access and field upgradable
  • Wide variety of non-proprietary powering options including – 4XAA internal batteries, AC, USB and external batteries.

Specifications:

Reference level 114.0 dB SPL
Reference level range Single large range for SLM Normal for OBA option
Reference frequency 1000 Hz
Reference direction 0° is perpendicular to the microphone diaphragm
Temperature ≤ ± 0.5 dB error between ≤ ± 0.5 dB error between -10° C and 50°C
Storage temperature -20°C to 70°C
Humidity ≤ ± 0.5 dB error from 30% and 90% relative humidity at 40°C
Equivalent microphone impedance 12 pF for Larson Davis 1/2" microphone
Range level error (OBA option) ≤ ± 0.1 dB relative to the reference range
Digital Display Update Rate Four times per second (0.25 sec between updates). First display indication is available 0.25 seconds after initiation of a measurement
Electrostatic Discharges The instrument is not adversely affected by electrostatic discharges
Extended weather options -40 °C to +70 °C operation with CER-831-E
Resolution Specifications
Levels 0.1 dB
Dose 0.1%
Elapsed time 0.1 second
Real time clock 1 second
Calender 01 Jan 2008 - 31 Dec 2038
Integration Time
Time averaged Levels and Sound Exposure Levels (s)
Minimum 0.1 second
Maximum with daily autostore enabled Unlimited
Maximum with daily autostore disabled > 23 days with error > 0.5 dB
Dosimeter Metrics: TWA, Dose (s)
Minimum 0.1 second
Maximum Unlimited