Portable outdoor noise monitoring system with sound recording Larson Davis SoundAdvisor™ NMS-SE-831C

Price: Contact

Model	NMS-SE-831C
Manufacturer	LARSON DAVIS (a part of the PCB PIEZOTRONICS)
Power supply	N/A
Weight	N/A
Size	N/A
Condition	Stocking
Warranty	12 months

Details description
Specifications
Video
Download document
Accessory

Need a Portable outdoor noise monitoring system that you can deploy outdoors, collect measurement data, and then retrieve for analysis?

I. Specifications of Portable outdoor sound monitoring system Larson Davis SoundAdvisor™ NMS-SE-831C

Powered with SoundAdvisor Sound Level Meter Model 831C, Portable outdoor noise monitoring system with sound recording Larson Davis SoundAdvisor™ NMS-SE-831C with 831C-SR firmware is a rugged, portable solution that can make sound recordings for easier noise source identification.

Powered via 8 D-cell battery pack, the SoundAdvisor™ NMS-SE-831C can continuously make measurements for one week.

Ideal to deploy, measure, download, then analyze
Records sound for noise source identification*
Includes SoundAdvisor Sound Level Meter Model 831C.

(* Sound recording requires 831C-SR firmware option.)

APPLICATIONS

Mining Operations Noise Monitoring
Construction Site Noise Monitoring
Wind Turbine Noise Monitoring
Entertainment Venue Noise Monitoring
Unattended Noise Monitoring.

II. Firmware for Portable outdoor noise monitoring system with sound recording Larson Davis SoundAdvisor™ NMS-SE-831C

From Octave Band Analysis to Event Detection and Alerts

REVERBERATION TIME MEASUREMENTS

Model: 831C-RA

Reverberation times are used in architectural acoustics applications ranging from simple experimental reverberation time determination for room performance, to calculating absorption coefficients for material performance. SoundAdvisor™ with 831C-RA firmware measures decays and then computes reverberation time according to ISO or ASTM standards. When using the Interrupted Noise method, the SoundAdvisor not only triggers the data acquisition, but its built-in Noise Generator can be used to drive the omni-directional sound source. Integrated Impulse method is also available. Measurements can be made using 1/3 octaves or full octave bands. The meter computes the decay times automatically, shows the T20 and T30 spectra superimposed, computes seven (7) quality indicators per frequency, and grades the measurement data.
The resulting data and decays can be exported to the G4 LD Utility or can be processed further in DNA for reverberation time, absorption coefficients, or sound insulation calculations.

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MEASURED SOUND RECORDING

Model: 831C-SR

Measuring sound levels is a well-accepted way to objectively quantify the noise radiated by a product in an environmental survey. Rather than rely simply on the objective data, why not record a sample of the sound to truly determine the source of the noise?
The firmware 831C-SR option enables the SoundAdvisor to record audio files in a raw format (.wav) for lossless recording or with .ogg compression to reduce file size. Listen live or to recordings from the meter, or listen to recordings from G4 LD Utility Software or LD Atlas Mobile App. Record audio of automatically triggered events, at the beginning of each Measurement history, manually, or with logic level input.

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OCTAVE BAND ANALYSIS

Model: 831C-OB3

In many applications, it is important to acquire both the broadband level and spectral content of noise data. With spectral information, the source and content of the measured level can be better understood. Constant percentage bandwidth filters (1/1 or 1/3 octave) best approximate human perception of sound.
Option 831C-OB3 firmware enables simultaneous real-time measurement of 1/1 and 1/3 octave Leq, Lmax, Lmin along with all the ANY LEVEL™ broadband parameters. Option 831C-OB3 is compliant with IEC 61260:2014 Class 1 and ANSI S1.11-2014 Class 1 standards covering the entire frequency range of human hearing: 6.3 Hz to 20 kHz for 1/3 octave bands.
When 831C-OB3 is combined with Time History Logging (831C-LOG) or Automatic Event Detection and Event History (831C-ELA), it is possible to review the frequency content of logged data or specific events.

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FFT SOUND AND VIBRATION ANALYSIS

Model: 831C-FFT

When higher frequency resolution than 1/3 octaves is needed, FFT Frequency Analysis Model 831C-FFT is the ideal solution. The narrow-band filtering provided by Fast Fourier Transform (FFT) Analysis of single-channel acoustic or vibration sources is useful for machinery analysis, product development, source detection, tonality measurement, fault analysis, and vibration troubleshooting. Offering precision spectral analysis of signals, FTT acquisition settings can be adjusted to visualize specific acoustic and vibration phenomena. Using FFT on the handheld Larson Davis SoundAdvisor™ 831C Sound level meter is a convenient way to achieve an objective measurement of tones or vibration phenomena in the field.

Tonality Standards Supported

ISO/PAS 20065:2016
ISO 1996-2:2007 Annex C
ISO 1996-2:2017 (ISO/PAS 20065).

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ACOUSTIC PARAMETER LOGGING

Model: 831C-LOG

The Sound level meter Larson Davis SoundAdvisor™ 831C can be used to record the evolution of sound pressure level over time as a Time History (TH). The Time History is then used to profile the observation period, which can vary from several seconds to continuous monitoring.

With the addition of Time History Logging Firmware (831C-LOG), users can pre-select from logging periods as small as 20 ms to a full 24 hours. Parameter selections consist of familiar acoustic metrics as well as non-acoustic metrics, such as battery condition, outdoor microphone performance, and meteorological data (831C-WTHR).

LOGGED FOR OBA FILTER

(Selected Frequency and Time Weighting Parameters for 1/1 and 1/3 Octaves)

Leq
Lmin
Lmax.

LOGGED FOR A, C, AND Z WEIGHTINGS (VARIABLE W)

Lweq
Lwpeak
LwSmax
LwFmax
LwImax
LwSmin
LwFmin
Lwlmin
LwS
LwF.

OTHER PARAMETERS

LCeg - LAeg
LIeg - LAeg
Statistics (Ln)
Battery
Temperature
External Power
Wind Speed
Gust Direction
Gust Speed
Avg Temp
Max Temp
Min Temp
Avg Humidity
Max Humidity
Min Humidity.

Portable-outdoor-noise-monitoring-system-with-sound-recording-larson-davis-soundadvisor-nms-se-831c

MEASUREMENT HISTORY

Model: 831C-ELA

While Time Histories are typically logged at one sample per second, longer- term averages are often useful to see trends, e.g., 10 minute or hourly averages. 831C-ELA firmware enables Measurement History (MH) and logs these parameters similar to Time History (TH) over a longer interval time. MH and TH can run together simultaneously or independently.
Data for each measurement or location is saved in a unique MH record and may include the Leq, Lmax, Lmin, SPL, and statistical distribution of the SPL (Ln). A complete set of MH records then can be stored in a single measurement that keeps all the noise survey data in a single file. Finally, an automated sound recording at the beginning of each MH period can be achieved with 831C-SR firmware.

DATA	PARAMETERS			NOTES
Averages	Leq	LE
Sound	Lmax	Lmin	Lpeak
Occurrence Date & Time	Lmax	Lmin	Lpeak
Temperature	Avg	Max	Min
Relative Humidity	Avg	Max	Min
Wind Speed	Avg	Max	Min
1/3 Octaves	Leq	Lmax	Lmin	w/ 831C-OB3
1/1 Octaves	Leq	Lmax	Lmin	w/ 831C-OB3
Date & Time	Date	Time
Measurement Time	Run Duration	Run Time	Pause Time
GPS	Lat	Lon	Elevation	w/ GPS002
Other	Exceedance	6 Ln

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AUTOMATIC EVENT DETECTION AND ALERTS

Model: 831C-ELA

In Sound level meter Larson Davis SoundAdvisor™ 831C, events are defined as one of the following:

Exceedance of a fixed threshold level for a minimum duration
Exceedance of a dynamic threshold level for a minimum duration
External trigger set by the digital input signal.

With 831C-ELA firmware, event definition is defined by you – including threshold level, duration, and event continuation period when the SPL drops below the threshold level for a specific period of time. Triggering status icons identify event progression and qualification (see graph above).

SoundAdvisor™ 831C can automatically generate an email alert to provide fast notice of any noise exceedance. The event alerts can be sent to a user configurable list of email addresses or by text message using an email to MMS gateway. Email event sound recording in conjunction with option 831C-SR.

ADDED FUNCTIONALITY WITH 831C-ELA OPTION
With Option	Description
831C-OB3	Frequency analysis of the event
831C-LOG	Record an independent time history of the event including filters when combined with 831C-OB3
831C-SR	Record event audio in .wav or compressed file

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NOISE MONITORNING SCHEDULING TOOLS

Model: 831C-SCH

Data and alerts are often needed only on certain days or specific times. With 831C-SCH firmware, schedule run/stop times, modem usage, and alert type and recipient. Together with the optional event feature, 831C-ELA, trigger levels and alert recipient can be adjusted for time of day or day of the week. In conjunction with 831C-SW firmware, schedule power to the modem - conserve power when the modem is not needed.
With the graphical interface in G4 LD Utility software, easily configure SoundAdvisor™ 831C to measure and report only what you need, even when those needs change.

Example of an 831C-SCH schedule with daily Run/Save times (green), two alert recipients on weekdays (orange), three alert levels (red), a special weekend schedule, and the modem “waking up from” low power consumption mode every weekday evening (purple).

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CELLULAR COMMUNICATION

Model: 831C-SW

We understand how beneficial it can be to have access to your noise monitor at any time of the day. Due to the remoteness or need to setup contracts and get permits, connecting a noise monitor to a wired network or main power just isn’t feasible.
With option 831C-SW you can connect the Sound meter Larson Davis SoundAdvisor™ 831C by USB directly to a Sierra Wireless gateway and get a highly portable noise monitor that can easily be powered by battery and/or solar. We recommend the Sierra Wireless model RV50X because of its low power usage and industrial design.

Portable-outdoor-noise-monitoring-system-with-sound-recording-larson-davis-soundadvisor-nms-se-831c

III. Software solutions for Portable sound monitoring system with sound recording Larson Davis SoundAdvisor™ NMS-SE-831C

SoundAdvisor™ NMS-SE-831C has numerous on-board capabilities, yet often further processing, visualization, or reporting needs exist. For this purpose the Sound meter SoundAdvisor™ NMS-SE-831C can be used as a portable instrument and retrieve the data, work as a data acquisition front-end, or in combination with other products.

G4 LD UTILITY SOFTWARE

With G4, connect, control, download, and view data from multiple devices simultaneously. Organize files and meters by project. View data, generate reports, and easily export in Excel® format for further data analysis. Examine graphs of multiple parameters and heat maps of octave band data. G4 is compatible with Models 831C, 831, LxT, HVM200, 730, 730-IS, Series 821ENV and 821IH.

Store measurement set-ups for use on one or more Sound Level Meters
Download data to PC and export to Excel® for further analysis
Connect to 831C-based meters and noise monitoring systems via USB, Ethernet, or cellular connection
Manage multiple noise meters and systems with simple and convenient project and file management
View time history data in graphical format
Listen to audio recordings
View Sound Level Meter screen on your PC – ideal for presentations or training.

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LD Atlas™ MOBILE DEVICE APPLICATION

Install the free LD Atlas on your phone or tablet – iOS or Android – and connect to your SoundExpert™ Sound Level Meter 821ENV, Spartan™ Sound Level Meter Series 821IH, Spartan™ Noise Dosimeter Model 730, SoundAdvisor™ Sound Level Meter Model 831C, and Human Vibration Meter Model HVM200.

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DATA SERVICE WEB-BASED NOISE MONITORING

Data Service is a cloud-based tool that provides both public access to noise levels and easy access to in-depth historical noise data and reports.
Data Service collects data from Larson Davis SoundAdvisor™ 831C noise monitors and presents the information in a format accessible and appropriate for all stakeholders.

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SoundLink SOFTWARE SERVICES

SoundLink Service enables remote access worldwide. This solution reduces labor costs, simplifies data gathering, and allows for remote status monitoring and quick responses to noise concerns. SoundLink is compatible with Model 831C, NMS044, and NMS045.

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DATA NAVIGATION AND ANALYSIS SOFTWARE (DNA)

Data Navigation and Analysis Software (SWW-DNA) is designed to analyze and report environmental noise, worker exposure, and architectural acoustic measurements with an interactive graphical interface. With many sound studies being similar in nature, a drag- and-drop feature places new data in an existing layout that allows for quick, professional-looking reports. DNA can either retrieve existing files from Model 831C, or can drive the 831C as a data acquisition front-end.

Remote network access
Interactive graphs with data: zoom, overlay Time History and spectrogram with playable event sound recordings, advanced event analysis, mapping, industrial hygiene, and more.
Template-based operation with customizable options.

Portable-outdoor-noise-monitoring-system-with-sound-recording-larson-davis-soundadvisor-nms-se-831c

SOFTWARE DEVELOPMENT KIT (831C-SDK)

Build your own software or integrate the SoundAdvisor into your existing application using our Software Development Kit (SDK).
The Software Development Kit for the Sound level meter Larson Davis SoundAdvisor™ 831C interfaces smoothly and directly with Microsoft® or Linux® programming environments supporting Excel®, HTML5, Javascript, Visual C++, or C# programming languages. The SDK provides functionality to connect and fully control the Model 831C over USB, network, or wireless gateway (modem) connections. File download is supported and the SDK includes documentation and software for extracting data from files. With JSON (JavaScript Object Notification), the SDK makes it easy to create modern, web-based applications with minimal effort.

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IV. Ordering information of Portable outdoor noise monitoring system with sound recording Larson Davis SoundAdvisor™ NMS-SE-831C

Model Number	Description
Sound Level Meter
831C-FF	SoundAdvisor Model 831C sound level meter with Class-1 free-field, pre-polarized precision condenser microphone (50 mV/pa), preamplifier (PRM831), accessory kit (831C-ACC)
831C-FF-KIT1	831C-FF with DVX012 and firmware options 831C-LOG, 831C-OB3, 831C-ELA & 831C-SR
831C-FF-KIT2	SoundAdvisor Model 831C-FF with firmware options 831C-LOG & 831C-OB3
831C-RI	SoundAdvisor Model 831C sound level meter with Class-1 random-incidence pre-polarized condenser microphone (50 mV/Pa), preamplifier (PRM831), accessory kit (831C-ACC)
831C-RI-KIT1	SoundAdvisor Model 831C-RI with DVX012 and firmware options 831C-LOG, 831C-OB3, 831C-ELA & 831C-SR
831C-LOWN	SoundAdvisor Model 831C sound level meter with 378A04 low noise, ICP® microphone and preamplifier (450 mV/Pa), accessory kit (831C-ACC) and ICP adapter (ADP074)
831C-ENV	SoundAdvisor Model 831C class 1 sound level meter base kit for environmental noise. Includes EPS2116, PRM2103-FF, CBL203-20 & PSA032 and firmware options 831C-LOG, 831C-OB3, 831C-ELA, 831C-SR & 831C-SW
831C	SoundAdvisor Model 831C sound level meter for environmental and community noise without microphone or preamplifier
Firmware Options
831C-LOG	Upgrade Model 831C sound level meter with logging of time histories with periods from 20 ms to 24 hr
831C-OB3	Upgrade Model 831C sound level meter with Real-time 1/1 & 1/3 octave filter set
831C-ELA	Upgrade Model 831C sound level meter with event, interval and daily histories logging
831C-SR	Upgrade Model 831C to record compressed and uncompressed audio
831C-MSR	Upgrade Model 831C to add Measurement History and sound recording
831C-SW	Upgrade Model 831C to add direct USB communication with Sierra Wireless RV50 gateway
831C-FFT	Upgrade Model 831C to add FFT Analysis and tonal assessment
831C-RA	Upgrade Model 831C to add Room Acoustic measurement capability
831C-SCH	Upgrade Model 831C to add scheduling for measurements, communication options, and alert levels
Calibration
CER-831	ISO 17025 compliant calibration and certification of 831C (SLM, preamplifier with microphone) and 831C-RPT
CER-831-E	Environmental certification Model 831C for [-40,+158] °F ([-40,+70] °C) range. Includes calibration of 831C and PRM831, 831-RPT, environmental test of microphone. Microphone calibration not included.
CER-MIC	Calibration and certification for microphone
CER-PRM2103-E	Environmental Certification Model PRM2103 for [-40,+158] °F ([-40,+70] °C) range; (no microphone certification); environmental test of microphone
831-RPT	Model 831C Sound Level Meter certification test report. Certificate for SLM, preamplifier, and microphone.
Accessories
831C-ACC	Accessory kit for Model 831C sound level meter, which includes case (831-CCS), batteries (4-AA), power supply w/ USB cable (PSA029), WiFi dongle (DVX014), and windscreen (WS001)
831-CCS	Hard shell case with rugged foam lining
831-MEM32G	USB memory, 32GB
ADP074	Adapter to provide ICP output on BNC connector
ADP097	Direct input adapter with BNC connector for Model 831C & 831 sound level meters
BAT015	8 D cell battery holder with fuse; batteries not included
CBL138	Cable USB A to mini-B 6 ft (1.8 m)
CBL139	AC/DC output cable with 2.5 mm sub-miniature plug to BNC or RCA
CBL140	DC power cable for Model 831 Sound Level Meter, 10 - 25 VDC includes lead-acid battery clamps and 12 V car plug
CBL170	Cable connecting Model 831 to 9-pin D connector (wind speed, direction, logic I/O, 3 slow ADC) and coaxial DC connector (to PSA027)
DVX018	USB Adaptor to serial (DB9 connector)
DVX012	USB to Ethernet adapter
DVX013	Gigabit Ethernet dongle for 831C with USB-A connector to RJ-45 (CAT5) and includes 3 port USB hub. Hub requires external 5V power, AC adapter included (StarTech model ST3300GU3B). For DC power use PSA036
DVX014	WiFi adapter supporting b/g/n for 831C (D-Link DWA-121)
DVX015	USB self-powered 2 port hub (Cables To Go model #29525)
EXC006/10/20/50	Microphone extension cable, 5 pin Switchcraft, 6 ft (2 m), 10 ft (3 m), 20 ft (6 m), 50 ft (15 m). Additional lengths available
GPS002	USB connected GPS receiver
PSA029	AC Power supply (100-240 VAC to 5 V USB w/mini-B cable, CBL138)
PSA036	12V to 5V DC power adapter for use with DVX013
SEN025	Single axis accelerometer, 10 mV/(m/s2) or 100 mV/g ICP.
WS001	3.5 inch diameter windscreen for 0.5 inch microphone
Microphones and Preamplifiers
377B02	0.5inch free-field, prepolarized condenser microphone, typical sensitivity = 50 mV/Pa, 3.15 Hz to 20 kHz (±2 dB)
377C20	0.5 inch random incidence, prepolarized condenser microphone 50 mV/Pa, 3.15 Hz to 16 kHz (±2 dB)
377C10	0.25 inch pressure, prepolarized condenser microphone typical sensitivity = 1.6 mV/Pa, 4 Hz to 70 kHz (±2 dB)
378A04	ICPr Low noise microphone & preamplifier system, 6.5 dB A-weighted typical noise
ADP043	0.25 inch microphone to 0.5 inch preamplifier adaptor
PRM831	Model 831C Sound Level Meter preamplifier for 0.5 in free-field or random incidence prepolarized microphones
PRM2103-FF	Permanent Outdoor Preamplifier with free-field microphone with Remote Calibration Check, humidity reading and heater, for pre-polarized microphone. Random or 90 degree response can be selected on the Model 831C.
Software
SWW-SLM-UTILG4	G4 LD Utility software for SoundTrack® LxT and Model 831C sound level meter: download, upgrade, translate, print text reports or export to spreadsheet. CD with Quick Start Guide
SWW-DNA	Basic software and dongle (USB) for evaluation and reporting of data downloaded from the Larson Davis instruments, requires an instrument driver
SWW-DNA-831	Instrument driver for instrument control, set-up, live display, data translation, and data download for Model 831C & 831 sound level meter
SWW-DNA-EV	DNA option for Events tracking: PNL and PNLT Event Time History and EPNL Event
SWW-DNA-BA	DNA software Building Acoustics, allows calculation of transmission loss and sound insulation calculations
SWW‑DNA‑REMOTE	DNA software for monitoring a remote location when using 820, 824, 870, or 831C Models. Uses modem connection for communication and data download.
Calibrators
CAL200	Class 1 acoustic calibrator with user selectable output of 94 or 114 dB at 1 kHz. 1/2 inch opening (no adaptor)
CAL250	Class 1 microphone calibrator, output 114 dB at 251.2 Hz. 1 inch opening with 1/2 inch (ADP019) adaptor. 3/8 inch (ADP020) and 1/4 inch (ADP021) adaptors available
Noise Monitoring System Components
COM-RV50-DC-E/U	Sierra Wireless Model RV50 cellular gateway to add Internet connectivity through cellular network to 831C. Choose /U for US and /E for rest of world. Requires option (831C-SW for direct USB connection).
EPS030-831	Case for Model 831C Sound Level Meter including (1) 21 Ah battery, charger (PSA032), internal preamplifier cable (CBL141), and power distribution cable (CBL151)
EPS036-831	Case on wheels (CCS035) to enclose Model 831C with (2)x 21 Ah batteries (BAT011). Includes CBL166 & CBL168 to power Model 831C
EPS037-831	Case on wheels (CCS035) to enclose Model 831C with 100 Ah batteries (BAT012). Includes CBL166 & CBL168 to power Model 831C
EPS042	Environmental protection for 831C, 831 or LxT with BAT015 in a CCS002 hard case; includes a cable gland
EPS044	Noise monitor enclosure for 831C including CCS051, CCS052, ACC009, PSA038, CBL224-02, CBL225-01, CBL226-02 & CBL228-03
EPS044-SLA	Noise monitor enclosure for 831C including CCS051, CCS052, BAT020 35 Ah SLA battery, ACC009, PSA038, CBL224-02, CBL225-01, CBL226-02 & CBL228-03
EPS044-LFP	Noise monitor enclosure for 831C including CCS051, CCS052, BAT019 45 Ah LiFePo battery, ACC009, PSA038, CBL224-02, CBL225-01, CBL226-02 & CBL228-03. License required to ship battery
EPS2116	Environmental protection for 1/2 inch preamplifiers with windscreen, bird spikes, desiccants, and universal mounting
SEN031	Combined weather sensor: wind speed and direction (no moving parts), temperature, humidity, pressure, rainfall (requires CBL167 cable + DVX008A)
TRP001	Instrumentation tripod with ADP032 preamplifier to tripod interface
TRP003	Support tripod, maximum height 8 ft (2.4 m) used in portable NMS systems
CBL174	Waterproof cable connecting EPS030-831 to external PC, 2 m USB A-to-B
ACC009	Monopole for use in EPS044 and NMS044 systems
BAT019	45 Ah 12V LiFePo battery. Weighs 12.8 pounds (5.8 kg)
BAT020	35 Ah 12V SLA battery. Weighs 24.7 pounds (11.2 kg)
CBL218	Cable, USB-A to micro-B, 3 ft (1 m)
CBL222-08	Cable connecting 831C or 831 to PRM2103 with Anderson Powerpole® connectors for 12V power. (8 ft / 2.4 m)
CBL222-20	Cable connecting 831C or 831 to PRM2103 with Anderson Powerpole connectors for 12V power. (20 ft / 6 m)
CBL223-02	Power cable for Sierra Wireless with sense line and Anderson Powerpole connectors for 12V power (2 ft / 0.6 m)
CBL224-02	Power cable for 831C or 831 with Anderson Powerpole connectors for 12V power (2 ft / 0.6 m)
CBL225-01	Power cable for battery with spade connectors and Anderson Powerpole connectors for 12V power (1 ft / 0.3 m)
CBL226-02	Power cable with Anderson Powerpole connectors to bare wires (2 ft / 0.6 m)
CBL228-03	Cable, 1m, with MC-4 connectors for solar and bare wires for use with solar charge controllers
CCS051	Base enclosure for EPS044 and NMS044 systems that includes mounting plate, glands and mount for ACC009
CCS052	Canvas bag with zipper and handles. 19 x 9 x 6 in (48 x 23 x 15 cm)
COM-ANT-GPS	GPS antenna with SMA connector and cable for use Sierra Wireless modem like RV-50
SLP001	Portable folding 60 Watt solar panel with integrated stand and carrying case
SLP002	Portable folding 100 Watt solar panel with integrated stand and carrying case
PSA038	Solar charge controller, 10A, used in EPS044 and NMS044 configurations
PSA039	AC power supply, 15 V, 90 W, with MC4 connectors for use with EPS044 & NMS044
PSA040	SLA Battery Charger with PowerPole output connectors. Input: 100-240VAC, 50-60Hz, 0.80-035A. Output: 14.7VDC, 2.25A
Noise Monitoring System Components
NMS044‑LFP100‑E	Complete NMS for use outside US including Model 831C with 831C-LOG, 831C-ELA, 831C-SW, EPS044-LFP, COM-RV50-DC-E, 2 ea. COM-ANT-HG, PRM2103-FF, EPS2116, SLP002, PSA039 & necessary cables. For use when solar insolation > 1 kW•h/m2/day
NMS044‑LFP100‑U	Complete NMS for use in US including Model 831C with 831C-LOG, 831C-ELA, 831C-SW, EPS044-LFP, COM-RV50-DC-U, 2 ea. COM-ANT-HG, PRM2103-FF, EPS2116, SLP002, PSA039 & necessary cables. For use when solar insolation > 1 kW•h/m2/day
NMS044‑SLA100‑E	Complete NMS for use outside US including Model 831C with 831C-LOG, 831C-ELA, 831C-SW, EPS044-SLA, COM-RV50-DC-E, 2 ea. COM-ANT-HG, PRM2103-FF, EPS2116, SLP002, PSA039 & necessary cables. For use when solar insolation > 1 kW•h/m2/day
NMS044‑LFP100‑U	Complete NMS for use in US including Model 831C with 831C-LOG, 831C-ELA, 831C-SW, EPS044-LFP, COM-RV50-DC-U, 2 ea. COM-ANT-HG, PRM2103-FF, EPS2116, SLP002, PSA039 & necessary cables. For use when solar insolation > 1 kW•h/m2/day

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Technical specifications of Portable outdoor noise monitoring system with sound recording Larson Davis SoundAdvisor™ NMS-SE-831C

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)
AC Output Voltage Range	± 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)
Operating Time (with power save options)	> 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