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Specifications | SoundAdvisor™ Model 831C Sound Level Meter

From Standards Compliance to Measurement Information

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STANDARDS
The Model 831C meets the specifications of the following standards:
Sound Level Meter Standards
IEC61672-1 Ed. 2.0 (2013) Class 1, Group X
IEC60651 Ed 1.2 (2001) plus Amendment 1 (1993-02) and Amendment 2 (2000-10) Type 1, Group X
IEC60804 (2000-10) Type 1, Group X
ANSI S1.4-2014 Class 1
ANSI S1.43-1997 Type 1
DIN 45657
Octave Filter Standards (Option 831C- OB3)
IEC61260 Ed. 2.0 (2014) Class 1, all filters
ANSI S1.11-2014 Class 1, all filters
Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use
2006/95/EC Low Voltage Safety Directive
IEC 61010-1 Ed. 3.0 (2010-06)
EMC Immunity and Emission
2004/08/EC EMC Directive
IEC 61326-1 Ed. 2.0 (2012-07)
IEC 61672-1 Ed. 2.0 (2013-09)
FCC Title 47 CRF Part 15, Class B
SPECIFICATIONS
General
Reference Level 114.0 dB re. 20 µPa
Reference Level Range Single large range for SLM measurements
Reference Frequency 1000 Hz
Reference Direction 0° is perpendicular to the microphone diaphragm
Operating Temperature ≤ ± 0.5 dB variation between -22 °F to +122 °F (-30 °C to 60 °C)
Storage Temperature -22 °F to 158 °F (-30 °C to 60 °C)
Humidity ≤ ± 0.5 dB variation from 10% to 99% relative humidity (non-condensing)
Equivalent Microphone Impedance 12 pF
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.
Effect of an Extension Cable None up to 200 ft (61 m) with EXCxxx cable
Approvals CE, ROHS, WEEE
Extended Weather Options -40 °F to +158 ºF (-40 °C to +70 ºC) operation with CER-831-E
Physical
Length with Microphone and Preamplifier 11.35 in 29.0 cm
Length, Instrument Body Only 8.8 in 22.4 cm
Width 2.8 in 7.1 cm
Depth 1.6 in 4.1 cm
Weight with Batteries, No Preamplifer or Microphone 17.3 oz 490 g
Weight with Batteries, Preamplifer, and Microphone 18.8 oz 532 g
Sound Level Meter Specifications
Averaging (Integration Method) Linear or Exponential
Time Weightings Slow, Fast,or Impulse
Frequency Weightings A, C, and Z
Peak Detector Frequency Weighting A, C, or Z
Gain 0 dB or +20 dB
Sample Rate 51,200 Hz
Peak Rise Time 30 µs
Metrics Measured Leq, Lmax, Lmin, Lpeak, Ln (6 values), LDN, LDEN, LCeq – LAeq
Resolution Specifications
Levels 0.1 dB
Elapsed Time 0.1 s
Real Time Clock 1 s
Calendar Through January 1, 2038
Integration Time
Time Averaged Levels and Sound Exposure Levels
Minimum 0.1 s
Maximum with Daily Autostore Enabled Unlimited
Maximum with Daily Autostore Disabled > 23 days with error < 0.5 dB
Broadband Noise Levels
Self-generated Electrical Noise 0 dB Gain 20 dB Gain
Weighting Typical (dB) Max (dB) Typical (dB) Max (dB)
A 13 15 6 10
C 15 22 12 16
Z 22 25 19 26
Self-generated Total Noise 0 dB Gain 20 dB Gain
Weighting Typical (dB) Max (dB) Typical (dB) Max (dB)
A 18 19 17 17
C 18 23 17 19
Z 23 26 21 26
Note: Combination of the electronic noise and the thermal noise of the 377B02 microphone at 68 °F (20 °C) measured in a sealed and vibration isolated cavity with an averaging time of 60 seconds. Electronic noise of the instrument with an ADP090 (12 pF) in place of the microphone highest anticipated self-generated noise.
FEATURES
Ln Statistics
Number of Selectable Parameters 6 in xx.xx% format
Distribution Resolution 0.1 dB
Spectral Statistics Requires Octave Analysis option (831C-OB3)
Markers
Number of Markers 10
Prenamed Markers Truck, Automobile, Motorcycle, Aircraft, Exclude
Back Erase Time 5 or 10 s
Measurement Control Modes
Available Modes Manual Stop, Timed Stop, Stop when Stable, Continuous, Single Block Timer, Daily Block Timer
Timed Stop Time in hh:mm:ss
Stop When Stable Delta level in xx.x dB and time in hh:mm:ss
Continuous with Daily Auto-Store 1, 2, 4, 6, 12, 24, 48, 96 or 144 files per day, automated file numbering
“yymmddnn.LD0”
Restart after Power Failure Automatic if powered by 12 VDC and continuous run mode
Single Block Timer Start date and time to end date and time
Daily Block Timer Up to 3 blocks between each start and end date
Clock Stability
< 1 sec in 24 hours, at 75 ºF (+24 ºC)
< 10 sec in 30 days, at -40 °F to +158 °F (-40 °C to +70 °C)
<1 s when using NTP
Microphone Input
Connector Latching 5-pin connector
Input Impedance 100 kΩ and 300 pF
Full Scale Input (0 dB gain) 14 Vpeak
ICP Current (requires ADP074) 4 mA
AC/DC Output
Jack 2.5 mm (3/32 in) female
AC Output Voltage Range ± 14 Vpeak (preamplifier output)
± 2.1 Vpeak with 0, 20 or 40 dB gain (for LINE inputs)
AC Output Recommended Load 10 kΩ or greater
DC Output Voltage Scale 10 mV per dB, 0 V for 0 dB, 1 V = 100 dB
DC Output Frequency & Time Weighting Follows SLM Settings: A, C, or Z and S, F, or I
Power
Batteries 4-AA (LR6) NiMH, 1.5 V Lithium or Alkaline cells (supplied with 2500 mAh NiMH)
External Power (5 V from USB) USB Mini-B connector to * USB interface from computer * PSA029 AC to DC power adaptor
External Power I/O connector: 10 to 25 VDC (Use cable CBL140)
Operating Time (with power save options) > 18 hours (1.5 V Lithium batteries)
> 8 hours (Alkaline or NiMH batteries)
Power Consumption with PRM831 1.1 W (backlight off, running)
≤ 2 W (with DVX012)
5 W (maximum)
Memory Retention
Data Memory Non-volatile flash memory, backup performed every minute
Real-time Clock ≥ 1 year with batteries removed