Soundadvisor Model 831C Octave Band Analysis Software - Option 831C-Ob3 - Larson Davis SoundAdvisor 831C Reference Manual

Location, GPS (internal or external GPS, records
last fix of measurement):
• Latitude: dg m.m
• Longitude: dg m.m
• Elevation: m or feet
• Time Acquired: h:m:s
Measurement Control
Multiple control modes provide for manual and
automated measurements
Manual: Manually control measurements-- RUN,
PAUSE, RESUME, STOP, STORE
Timed Stop: Start manually and runs for set run
time (1 second to 99 hours)
Stop When Stable: Start manually and runs until
levels are stable
Continuous: Start manually or at power on and
runs without interruption, Daily Auto-Store
A.4 SoundAdvisor Model 831C Octave Band Analysis
Software – Option 831C-OB3
Standards Met
Octave Filter Standards: IEC 61260-1:2014/Part 1,
1/1 and 1/3-octave Bands, Class 1, Group X, all
filters
ANSI/ASA S1.11-2014/Part 1, 1/1 and 1/3-octave
Bands, Class 1, Group X, all filters
Bandwidth
1/1 Octave, 1/3 Octave, or simultaneous 1/1 and 1/
3 Octave
Filter Type and Sample Rate
Digital filters are sampled at a rate of 51,200
samples per second, with base 10 center
frequencies and have real-time performance for all
filters. The 0 dB gain setting and "high" OBA range
FIGURE A-1 Filter Shape
SoundAdvisor Model 831C
-20.0
0.0
20.0
40.0
60.0
80.0
100.0
120.0
100.0 1000.0
Frequency Hz
available, special restart after low battery features
enabled
Single Block Timer: Runs from a set date and time
to another date and time
Daily Timer: Runs for up to three time blocks per
day qualified by a start date and an end date
Measurement Status
Measurement status is indicated on the display
and with lights below the STOP and RUN keys.
Stopped Reset, Stopped, Run, Paused, Stored,
Standby
Icons on display indicate Overload, battery state
and memory status.
Back–Erase
Erase the previous five or ten seconds from a
measurement.
is the reference range and the reference input
signal is .5 Volt rms at 1 kHz.
1/1 Octave Center Frequencies
8 Hz to 16 kHz
1/3 Octave Center Frequencies
6.3 Hz to 20 kHz
Measurement Range
Normal (110 dB full scale) and High (140 dB full
scale).
Filter Shape
1/3 octave band centered at 1 kHz. Overlaid with
the Class 1 limit curves.
1 kHz Filter
Lower Limit
Upper Limit
10000.0
A-8