SoundAdvisor Sound Level Meter Model 831C

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

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

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 25% to 90% relative humidity at 104 °F (40 °C)

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

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

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

Levels

0.1 dB

Elapsed Time

0.1 s

Real Time Clock

1 s

Calendar

Through January 1, 2038

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

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.

Number of Selectable Parameters

6 in xx.xx% format

Distribution Resolution

0.1 dB

Spectral Statistics

Requires Octave Analysis option (831C-OB3)

Number of Markers

10

Prenamed Markers

Truck, Automobile, Motorcycle, Aircraft, Exclude

Back Erase Time

5 or 10 s

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

< 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

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

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

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)

Data Memory

Non-volatile flash memory, backup performed every minute

Real-time Clock

≥ 1 year with batteries removed