Model 831 Manual 831 Features 1-1
CHAPTER
1
831 Features
Welcome to the Larson Davis Model 831. This versatile
instrument, with graphic display, performs the functions of
several instruments; It puts the combined features of a
precision sound level meter and a real-time frequency
analyzer in the palm of your hand.
Hardware Features
The Larson Davis Model 831 has the following features:
• Precision integrating sound level meter
• 2 GB data storage
• 160 X 240 graphic LCD display with backlight and
icon-driven user interface
• Quiet Touch elastomeric keypad
• Large dynamic range > 120 dBA
• RMS Detectors: Slow, Fast & Impulse
• RMS Frequency Weighting: A, C & Z
• Peak Frequency Weighting: A, C & Z
• Any Level
TM
: Simultaneous measurement and display
of Max and Min sound pressure levels (Slow, Fast and
Impulse detectors), plus Leq and Peak levels, all with
A, C and Z frequency weighting
• Weather Measurements (Wind Speed and Direction,
Temperature and Humidity)
• Jack for AC/DC output or headset microphone and
speaker
• Compatible with 61 m (200 ft.) microphone extension
cable (full scale to 20 kHz)
• 4-AA batteries provide upwards 8 hour operating
time
• Dust tight (IP53) durable plastic case with tripod
mount (tripod not included) and lanyard
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