Larson Davis SoundAdvisor 831C, 831C Reference Manual

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SoundAdvisor

Model 831C Sound Level Meter

Vertrieb für Österreich :

nbn Elektronik Handelsgesellschaft m. b. H.

Riesstraße 146, 8010 Graz | Tel. +43 316 40 28 05 | Fax +43 316 40 25 06www.nbn.at

Larson Davis

SoundAdvisor

Model 831C

Reference Manual

Copyright 2017, by PCB Piezotronics, Inc. This manual is copyrighted, with all rights reserved. The manual may not be copied in whole or in part for any use without prior written consent of PCB Piezotronics, Inc.

Disclaimer

The following paragraph does not apply in any state or country where such statements are not agreeable with local law:

Even though PCB Piezotronics, Inc. has reviewed its documentation, PCB Piezotronics Inc. makes no warranty or representation, either expressed or implied, with respect to this instrument and documentation, its quality, performance, merchantability, or fitness for a particular purpose. This documentation is subject to change without notice, and should not be construed as a commitment or representation by PCB Piezotronics, Inc.

This publication may contain inaccuracies or typographical errors. PCB Piezotronics, Inc. will periodically update the material for inclusion in new editions. Changes and improvements to the information described in this manual may be made at any time.

Safety

If the equipment is used in a manner not specified by Larson Davis, the protection provided by the equipment may be impaired.

Record of Serial Number and Purchase Date

SoundAdvisor Model 831C Serial Number: ___________

Preamplifier Model: _________ Serial Number: ___________

Microphone Model: _________ Serial Number: ___________

Recycling

PCB Piezotronics, Inc. is an environmentally friendly organization and encourages our customers to be environmentally conscious. When this product reaches its end of life, please recycle the product through a local recycling center or return the product to: PCB Piezotronics, Inc. Attn: Recycling Coordinator 1681 West 820 North Provo, Utah, USA 84601-1341 where it will be accepted for disposal

Warranty

For warranty information, refer to our Terms and Conditions of Sale on our website, www.larsondavis.com/TermsConditions.aspx.

i.1 Contact Larson Davis

Website

www.larsondavis.com

Worldwide Corporate Headquarters

Larson Davis - a PCB Piezotronics division 3425 Walden Avenue Depew, NY 14043-2495 USA

Toll-free (in the US): 888-258-3222 Phone: 716-926-8243 USA fax: 716-926-8215

E-mail: sales@larsondavis.com

SoundAdvisor Model 831C i-2

i.2 Download G4 LD Utility

G4 LD Utility (G4) software enhances the features, flexibility, and ease-of-use of Larson Davis instruments by providing setup utilities, instrument calibration, computer-based control of the instrument, data download and manipulation, printing, and export of data to third-party software for post processing and analysis.

When you insert the G4 LD Utility software CD, it will start automatically. If it does not, access the CD drive and click LDsetup.exe. Alternatively you can download G4 at http://www.larsondavis.com/G4

The install program prompts for any additional required information. A PCB Piezotronics menu item will be created under the Program menu item in the Start menu and a shortcut will be placed on the desktop.

i.2.1 Connecting SoundAdvisor to G4

After installing G4 LD Utility, make your initial connection via USB cable from your instrument to PC. Press the power button 0 on SoundAdvisor to turn the instrument on. Launch the G4 software and click Connect.

FIGURE I-1 G4 LD Utility Connect

In the Connect to Meter dialog box, select the device and connection type. Instruments that are detectable via USB connection appear automatically in the list. When your instrument appears, select it and click Connect when the instruments appear. G4 can be connected to multiple instruments through both TCP/IP address and USB connection. For more information about G4 see the G4 LD Utility Manual.

FIGURE I-2 Connection To Meter

SoundAdvisor Model 831C i-3

i.3 Using A Digital Reference Manual

Jump Back button for when you go to a link and want to return to your last place in the document

Loupe Tool allows for a quick zoom window

Make text notes that point directly to sections

Highlight or underline any text

Create links to open other documents you have that relate to the content.

Larson Davis is committed to the green practices of limited paper waste. In this effort, we only offer reference manuals in a digital PDF format. Digital notes and comments can be made in certain readers, and you are encouraged to print any procedures or sections for quick references that fit your needs. Each page is drafted on A4 size, and can be easily scaled to fit most printers. When printing set scaling to “Fit to Printable Area”.

FIGURE I-3 PDF View on Adobe Acrobat Pro

SoundAdvisor Model 831C i-4

Table of Contents

Module 1 SoundAdvisor Features 1-1

1.1 Overview ........................................................................................................................1-1

1.2 Basic Operations ............................................................................................................1-1

1.3 Applications .................................................................................................................... 1-2

1.4 Hardware Features ......................................................................................................... 1-2

1.5 Performance Features .................................................................................................... 1-3

1.6 Available Options ...........................................................................................................1-3

1.7 Accessories ....................................................................................................................1-4

Module 2 Instrument Overview 2-1

2.1 Overview ........................................................................................................................2-1

2.2 Instrument ...................................................................................................................... 2-2

2.3 Keypad ...........................................................................................................................2-4

2.4 Microphones and Preamplifiers ...................................................................................... 2-6

2.5 Displays and Icons .........................................................................................................2-6

Module 3 Getting Started 3-1

3.1 Unpacking & Inspecting .................................................................................................. 3-1

3.2 Connecting the Microphone & Preamplifier ....................................................................3-3

3.3 Connecting the Preamplifier to SoundAdvisor ................................................................ 3-4

3.4 Disconnecting the Preamplifier .......................................................................................3-4

3.5 Powering the SoundAdvisor ...........................................................................................3-4

3.6 Turn the SoundAdvisor ON ............................................................................................ 3-8

3.7 Long Term Storage of SoundAdvisor ........................................................................... 3-10

Module 4 Data Display 4-1

4.1 Overview ........................................................................................................................4-1

4.2 Data Labels ....................................................................................................................4-2

4.3 Live Displays .................................................................................................................. 4-2

4.4 Overall Displays ............................................................................................................. 4-6

4.5 Session Log Tab .......................................................................................................... 4-16

4.6 Adjust Graph Scale ...................................................................................................... 4-17

Module 5 Calibration 5-1

5.1 Calibration Overview ...................................................................................................... 5-1

5.2 Calibration Displays ........................................................................................................5-2

5.3 Choosing a Calibrator ..................................................................................................... 5-5

5.4 Performing a Calibration ................................................................................................. 5-6

Module 6 Measurement Setup 6-1

6.1 Overview ........................................................................................................................6-1

6.2 Setup Manager ...............................................................................................................6-2

6.3 Default to LD Default Setup ............................................................................................6-9

6.4 User Defined Setup ........................................................................................................ 6-9

6.5 Exiting the Setup Manager ...........................................................................................6-10

Module 7 Making a Measurement 7-1

7.1 Overview ........................................................................................................................7-1

7.2 Before You Start ............................................................................................................. 7-2

7.3 Performing the Measurement ......................................................................................... 7-4

7.4 Storing the Measurement ............................................................................................... 7-7

7.5 Low Level Sound Fields ................................................................................................. 7-8

Module 8 Measurement Data Files 8-1

8.1 Overview ........................................................................................................................8-1

I831C.01 Rev C Supporting Firmware Version 3.0.2 ii-1

8.2 Data Storage Preferences .............................................................................................. 8-1

8.3 Data File Manager ..........................................................................................................8-2

8.4 USB Drive Storage ......................................................................................................... 8-4

8.5 File Naming System ....................................................................................................... 8-6

8.6 Out Of Memory ...............................................................................................................8-7

8.7 Access Limited ...............................................................................................................8-7

Module 9 System Properties 9-1

9.1 Overview ........................................................................................................................9-1

9.2 Device ............................................................................................................................9-2

9.3 Time ...............................................................................................................................9-2

9.4 NTP ................................................................................................................................ 9-3

9.5 Power .............................................................................................................................9-3

9.6 Preferences .................................................................................................................... 9-6

9.7 Localization .................................................................................................................... 9-9

9.8 Displays ........................................................................................................................9-10

9.9 Options .........................................................................................................................9-11

9.10 Network ........................................................................................................................9-11

9.11 Email ............................................................................................................................9-12

9.12 Other ............................................................................................................................9-13

9.13 Set Reference Spectra .................................................................................................9-14

Module 10 About System 10-1

Module 11 Lock 11-1

11.1 Overview ......................................................................................................................11-1

11.2 Lock Meter .................................................................................................................... 11-1

11.3 Lock Modes .................................................................................................................. 11-2

11.4 Allow Calibration When Locked .................................................................................... 11-3

11.5 Constraints ................................................................................................................... 11-4

11.6 Unlock ..........................................................................................................................11-4

Module 12 System Utilities 12-1

12.1 Bad Flash Blocks ..........................................................................................................12-1

Module 13 Communications & WiFi 13-1

13.1 Communication ............................................................................................................ 13-1

13.2 Connecting to an Ethernet Port .................................................................................... 13-2

13.3 WiFi ..............................................................................................................................13-2

Module 14 Upgrade Firmware 14-1

14.1 G4 LD Utility .................................................................................................................14-1

14.2 Upgrading SoundAdvisor Firmware ............................................................................. 14-1

14.3 Upgrading Options ....................................................................................................... 14-3

14.4 Enabling/Disabling Optional Firmware ......................................................................... 14-4

Module 15 Measurement History 15-1

15.1 Overview ......................................................................................................................15-1

15.2 Enabling Measurement History .................................................................................... 15-1

15.3 Setting up the Measurement ........................................................................................ 15-1

15.4 Making a Measurement ................................................................................................ 15-4

15.5 Viewing Measurement Data ......................................................................................... 15-5

15.6 Storing Measurement History ....................................................................................... 15-6

Module 16 Time History 16-1

16.1 Overview ......................................................................................................................16-1

16.2 Metrics Logged .............................................................................................................16-1

16.3 Enabling Time History .................................................................................................. 16-3

SoundAdvisor Model 831C ii-2

16.4 Setting up the Measurement ........................................................................................ 16-3

16.5 Making a Time History Measurement ........................................................................... 16-5

16.6 Markers ........................................................................................................................16-5

16.7 Viewing Time History Data ........................................................................................... 16-6

16.8 Storing Time History ..................................................................................................... 16-8

Module 17 Event History 17-1

17.1 Overview ......................................................................................................................17-1

17.2 Enabling Event History ................................................................................................. 17-1

17.3 Setting up the Measurement ........................................................................................ 17-2

17.4 Making an Event History Measurement ....................................................................... 17-5

17.5 Viewing Event History Data .......................................................................................... 17-5

17.6 Storing Event History .................................................................................................... 17-7

17.7 Triggering Method ........................................................................................................ 17-7

Module 18 Sound Recording 18-1

18.1 Overview ......................................................................................................................18-1

18.2 Enabling Sound Recording Option ............................................................................... 18-1

18.3 Create Setup File ......................................................................................................... 18-1

18.4 Manual Sound Recording ............................................................................................. 18-2

18.5 Marker Sound Recording ............................................................................................. 18-3

18.6 Event Sound Recording ............................................................................................... 18-4

18.7 Sound Recording Playback .......................................................................................... 18-7

18.8 Storing Sound Recordings ........................................................................................... 18-8

Appendix A Technical Specifications A-1

A.1 Overview ....................................................................................................................... A-1

A.2 SoundAdvisor Model 831C Instrument Platform ........................................................... A-1

A.3 SoundAdvisor Model 831C Base Software ................................................................... A-4

A.4 SoundAdvisor Model 831C Octave Band Analysis Software – Option 831C-OB3 ........ A-7

A.5 SoundAdvisor Model 831C Event Logging Software – Option 831C-ELA .................. A-13

A.6 SoundAdvisor Model 831C Time History Software – Option 831C-LOG .................... A-14

A.7 Frequency Response .................................................................................................. A-15

Appendix B Measuring IEC61672-1 B-1

B.1 Overview ....................................................................................................................... B-1

B.2 Section 9.3 .................................................................................................................... B-1

Appendix C Glossary C-1

C.1 Overview ....................................................................................................................... C-1

C.2 Glossary of Terms ......................................................................................................... C-1

SoundAdvisor Model 831C ii-3

Module

1.1 Overview ............................................................................................................... 1-1

1.2 Basic Operations ................................................................................................... 1-1

1.3 Applications ...........................................................................................................1-2

1.4 Hardware Features ...............................................................................................1-2

1.5 Performance Features ..........................................................................................1-3

1.6 Available Options .................................................................................................. 1-3

1.6.1 Purchase-Required Options .....................................................................1-3

1.7 Accessories ...........................................................................................................1-4

1.7.1 Optional Accessories ...............................................................................1-4

1 SoundAdvisor Features

1.1 Overview

TAKE NOTE The “C” in 831C

stands for color.

1.2 Basic Operations

TRY THIS Explore the

interface, press buttons, change settings, and test the operations.

The SoundAdvisor Model 831C (the SoundAdvisor, 831C, or meter) is a

Class 1 acoustic monitoring instrument with a full-color touch screen that measures noise frequency, sound pressure level, and community and environmental sound.

G4 LD Utility (G4) software connects your meter through USB 2.0 highspeed and other wired and wireless methods to your PC. With G4 you can calibrate the meter, create setup files, download measurements, and analyze the results.

The SoundAdvisor performs the following operations:

• Measures sound: stop, pause, and resume measurement

• Display broadband and spectral sound values on a full-color display screen

• View live and stored data while a measurement is in process

• Log simultaneously to time, statistical measurement and event histories

• Use markers to annotate portions of time histories, including voice annotation

• Automatically back up data to prevent data loss on power failure

• Calibrate using a Precision Acoustic Calibrator, and store calibration history

SoundAdvisor Model 831C Overview 1-1

1.3 Applications

• Time stamping for L

• Sync clock with PC, attached GPS, or Network Time Protocol (NTP)

• Create multiple Setup configurations using the Setup Manager

• Record audio in .wav and .ogg formats with event, manual, or time-based triggers

The SoundAdvisor monitors:

• City noise

• Construction noise

• Airport noise

• Nuisance noise

• Noise ordinance compliance

max

, L

min

, L

peak-(max)

single event metrics.

1.4 Hardware Features

The SoundAdvisor is a precision integrating sound level meter with the following hardware features:

TAKE NOTE Up to 32GB USB

memory can be purchased from Larson Davis as an option.

• Wind farm noise

• 2 GB internal industrial grade data memory

• 240 x 320 full-color graphic LCD display with touchscreen user interface

• Quiet Touch elastomeric keypad

• 4-AA batteries provide upwards of 8 hours operating time, usable with NiMH, photo-lithium, lithium-Ion, and alkaline cells

• AC/DC output jack with full dynamic range option

• Compatible with 61 m (200 ft.) microphone extension cable (full scale to 20 kHz)

• Dust resistant durable plastic case with lanyard and tripod mount (tripod not included)

• USB 2.0 high-speed host connector for mass storage, weather sensors, USB headset, and WiFi communication devices

• USB 2.0 high-speed peripheral connector for control and data download by a PC

• I/O connector for power, weather transducers, logic input/output, and preamplifier communications

SoundAdvisor Model 831C Applications 1-2

1.5 Performance Features

• Large dynamic range > 120 dBA

• RMS Detectors: Slow, Fast & Impulse

• RMS Frequency Weighting: A, C & Z

• Peak Frequency Weighting: A, C & Z

• Any LevelTM 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 with SEN03x)

• Multiple language support: English, French, Italian, German, and Spanish

• Field-upgradeable firmware

1.6 Available Options

LEARN MORE To purchase

options, see “Contact Larson Davis” on page ii-2.

The SoundAdvisor is delivered with all firmware options available at the time of manufacture already installed. However, only those options which have been purchased are enabled. Any of the other firmware options can be enabled at a later date, following purchase, using a file delivered from Larson Davis.

1.6.1 Purchase-Required Options

831C-LOG

Time History data logging with periods from 2.5 ms to 24 hours 831C-OB3 Real-time 1/1 & 1/3 Octave Frequency Analysis

831C-ELA

Measurement History for the manual or timed storage of statistical data, and exceedance-based Logging Analysis with Events

831C-SR

Make event based and manual sound recordings that can be sent via email or SMS and stored in the measurement data.

831C-MSR

Measurement History for the manual or timed storage of statistical data, and exceedance-based Logging Analysis with Events, with all sound recording capabilities

831C-SW

Make direct USB communication with Sierra Wireless RV50 gateway.

SoundAdvisor Model 831C Performance Features 1-3

1.7 Accessories

TAKE NOTE Some of these

options may not be provided with systems designed for specific applications.

Microphone Preamplifier

Microphone

Software CD

Unless otherwise noted, the SoundAdvisor is delivered with these standard accessories:

PRM831 or PRM2103

377B02 1/2” free-field prepolarized microphone, 50 mV/Pa, providing performance conforming to Class 1 sound level meter standards or 377C20 1/2” random incidence prepolarized microphone, 50 mV/Pa, providing performance conforming to Class 1 sound level meter standards

G4 LD Utility Software for setup, measurement, download, and data viewing through CBL138 USB, TCP/IP, serial, or analog modem connections

Accessory Kit

Other

1.7.1 Optional Accessories

Microphones

831-ACC includes:

• 831-CCS Hard Shell Case

• PSA029 Universal AC USB Power Adaptor

• CBL138 USB to mini-B cable, 1.8 m

• WS001 3 1/2” Windscreen

• 4 Rechargeable AA NiMH batteries

Lanyard

• 377C01 1/4” free-field prepolarized microphone, 2 mV/Pa, for higher level and/or higher frequency measurements (ADP043 adaptor required)

• 377C10 1/4” pressure prepolarized microphone, 1.0 mV/Pa, for higher level and/or higher frequency measurements (ADP043 adaptor required)

SoundAdvisor Model 831C Accessories 1-4

Microphone Preamplifiers

Environmental Protection

• 426E01 1/2” ICP Low Noise Microphone Preamplifier (requires adaptor ADP074)

• PRM2103 Outdoor Microphone Preamplifier

• PRM426A12 Outdoor Microphone Preamplifier

EPS2116 Environmental Shell

Protects microphone and preamplifier from rain and wind with mounting options for pipes, poles, and most tripods

EPS030-831

Weather-proof enclosure for remote noise monitoring; includes battery

NMS/EPS043

Weather proof enclosure for remote noise monitoring

NMS044

Solar powered noise monitoring system for outdoor, long-term, and unattended sound monitoring

Weather Data Acquisition

• 831-INT 831 Interface Unit for use with 426A12 Outdoor Microphone Preamplifier and weather sensors

Communication

• DVX012, 013, 014, 015

• DVX008A USB to RS232, 9 Pin Adaptor

• 831-INT-ET 831-INT with integrated Ethernet capability

GPS

GPS001 GPS Receiver, USB Magnetic Mount

Equivalent Electrical Impedance Adaptor

An equivalent electrical impedance adapter can be used in place of the microphone when very high impedance measurements need to be made and the instrument is being tested electrically. The adapter is simply a series capacitor with the same capacitance as the microphone it is replacing. The following adapters are available. If square wave pulse measurement is to be performed, then the adapter must also be used with a 100 kHz, low pass, T filter.

• ADP002 6.8pF BNC Input Adaptor for 1/4 in., 7pF microphone equivalent

• ADP090 12pF BNC Input Adaptor for 1/2 in., 12pF microphone equivalent

• ADP092 BNC In-Line Low Pass Filter 75kHz

SoundAdvisor Model 831C Accessories 1-5

Cables

Extension and Interface Cables

• Microphone Extension Cable: EXCXXX (shielded), where XXX is the length in feet (XXX = 010, 020, 050, 100 and 200 available)

• CBL138 USB Cable

• CBL139 AC/DC Output Cable

Cables for Environmental Monitoring

• CBL152 Cable; 426A12 to 831 Signal, 20’

• CBL153 Cable; 426A12 to 831-INT Control, 20’

• CBL154 Cable; 426A12 to 831C Control, 20’

• CBL203 Cable; PRM2103 to 831Control, 20’

• CBL208 Cable; PRM2103 to 831-INT Control, 20’

Cable for use with PSA027 Universal Input Power Supply AC Power Adaptor

• CBL140 Cable; 831 Power, 2.5 mm JACK, 1’

Power Supply

Tripods

• PSA027 Universal 90-240 AC Power Adaptor providing power from electrical outlet, used to power the SoundAdvisor in conjunction with CBL140, CBL145 or CBL154. 1.25 A,

2.5X5.5X14 mm

• BAT015 External battery holder for the 831, holding 4 or 8 Dsized alkaline 1.5 volt batteries to extend run time

• TRP001 Instrument/Camera Tripod with ADP032 1/2 in. microphone clip used with EPS2116

• TRP002 Microphone Stand with Boom

• TRP003 Support Tripod, heavy duty, can be used with EPS029, EPS030 and EPS2116

• ADP091 Mounting adapter, 426A12 TO TRP003

• TRP019 Permanent 17' tilt down pole.

• TRP020-06 Heavy duty 6' tripod

• TRP020-10 Heavy duty 10' tripod

• TRP020-15 Heavy duty 15' tripod

• TRP020-20 Heavy duty 20' tripod

Other Hardware

Calibrators

• CAL200 Class 1 Sound Level Calibrator, 94/114 dB @ 1 kHz

SoundAdvisor Model 831C Accessories 1-6

Optional Software

• CAL250 Class 1 Sound Level Calibrator, 114 dB @ 250 Hz

Soft Case

CCS032 pouch with belt clip

DNA (Data Navigation and Analysis) software

SoundAdvisor Model 831C Accessories 1-7

Module 2 Instrument Overview

2.1 Overview ............................................................................................................... 2-1

2.2 Instrument ............................................................................................................. 2-2

2.3 Keypad .................................................................................................................. 2-4

2.3.1 Navigating and Selecting ......................................................................... 2-4

2.3.2 Basic Run Function .................................................................................. 2-5

2.3.3 Entering Text ............................................................................................ 2-5

2.4 Microphones and Preamplifiers .............................................................................2-6

2.5 Displays and Icons ................................................................................................ 2-6

2.5.1 Measurement Data Tabs ..........................................................................2-7

2.5.2 Pages ....................................................................................................... 2-8

2.5.3 Status Bar Icons ....................................................................................... 2-9

2.5.4 Display Menus ........................................................................................ 2-13

2.1 Overview

The SoundAdvisor Model 831C accomplishes all tasks related to sound

monitoring. The SoundAdvisor is a reliable and diversely competent meter. With the SoundAdvisor, you can:

• Measure all area sound

• Stream and record audio continuously or for events using sample rates up to 51.2 ksps in compressed or uncompressed format

• Communicate with via USB, Ethernet, cellular, or WiFi

• Operate completely from the device itself, or remotely using G4 LD Utility software

• Easily expand memory using USB memory

• Automatically synchronize the clock with Network Time Protocol (NTP) or GPS for optimal accuracy

• Select desired color theme on the full-color graphic LCD display with touchscreen user interface

This module describes the hardware and visual components that make up the SoundAdvisor.

SoundAdvisor Model 831C Overview 2-1

2.2 Instrument

Standard 1/2” free field or random incidence microphone

Release button to disconnect the preamp from the meter

240 x 320 full-color graphic LCD display with touchscreen user interface (shown with Dark color theme)

Display navigation softkeys

Multicolor backlit keypad

Tools button leads to system set-up information

On/Off button is also a one-touch power control access

Reset/Clear Measurement

USB Auxiliary port, AC/DC output jack, and I/O connectors

PRM831 Preamplifier

FIGURE 2-1 SoundAdvisor Instrument Overview (front)

SoundAdvisor Model 831C Instrument 2-2

FIGURE 2-2 Instrument Overview (bottom)

CAUTION DO NOT use the

hardware power switch to turn the SoundAdvisor ON or OFF. This may cause data to be lost. The purpose of this switch is to disconnect the batteries for storage (1 to 2 weeks). If any longer, then remove the batteries from the meter.

CAUTION The AC/DC jack is not a

headphone jack.

1. AUX connector intended for use with USB mass storage, cellular & dial-up modems, GPS, headphones, speakers, and future devices.

2. Hardware Power Switch when set to “ 0 ” completely powers down the SoundAdvisor for storage. Set to “ | ” for instrument operation.

3. USB Interface 2.0 peripheral full-speed port used for communication, full control, and downloading of data to PC. The PSA029 external power supply may be connected here. The maximum USB cable length is 1m and the cable is part number CBL138.

4. AC/DC 2.5 mm Output jack for analog AC/DC output signals.

5. The I/O Connector for peripherals and external power is typically used for external devices.

SoundAdvisor Model 831C Instrument 2-3

2.3 Keypad

Arrow Keys Up, Down, Right, Left

Reset a measurement

Power Control

Tools menu

Stop or Store a measurement Run or Pause a

measurement

Select or Enter

The SoundAdvisor has 13 buttons that are used to start, stop, or pause measurement, navigate display, and safely power the meter off.

FIGURE 2-3 SoundAdvisor Keypad

Softkeys: Left, Center, Right

2.3.1 Navigating and Selecting

To navigate the display on the meter, you can utilize the touch-screen feature and simply press your selection directly on the screen using the tip of your finger, or use the keypad.

Table 2.1 Navigating and Selecting

Action Key(s) Description

Navigate to tabs

Navigate to pages

/ /

8 2

SoundAdvisor Model 831C Keypad 2-4

Top left & right softkeys

Up & down arrow keys

Table 2.1 Navigating and Selecting

Action Key(s) Description

Navigate within display (e.g.,

move highlighted octave band)

Access content specific menu

Exit a menu

Navigate up & down in a display

Make a selection

2.3.2 Basic Run Function

Table 2.2 Basic Run

4 6

/*/

The basic run measurement functions can be executed using the following keys:

There are times when a content specific menu appear on the screen. The associated top soft key will access

The top middle soft key can be used to close or save. If you don’t want to save, press it, and then select no

The enter key can be used to move up and down on

The enter key can be used to make a selection

Left & right arrow keys

that menu.

to exit.

certain pages

Action Key(s) Description

Initiate a run

Pause a run

Stop measurement

Store data file

Reset measurement

2.3.3 Entering Text

9 9

7 7

The SoundAdvisor allows for complete operation from the meter itself. In instances where a text field will need to be edited, a keyboard will appear. Navigate the keyboard using the arrow keys 2 8 up & down and 4 6 left & right. Use the 5 key to make a selection.

While the SoundAdvisor is running, press this

End a measurement during a run or pause

Pressing the stop/store button while the meter is

stopped will store the measurement data

Press the reset key to clear measurement

Start a measurement

button to pause

SoundAdvisor Model 831C Keypad 2-5

FIGURE 2-4 Keyboard

2.4 Microphones and Preamplifiers

The following microphone preamplifier is used with the SoundAdvisor:

LEARN MORE For information

on using the SoundAdvisor with the PRM2103 preamplifier, see the PRM2103 Manual.

The following microphone are the most commonly used with the SoundAdvisor:

2.5 Displays and Icons

The SoundAdvisor has a full-color, back-lit LCD touchscreen. The color theme can be changed to dark or light from System Properties. See “System Properties” on page 9-1.

• PRM831 1/2” Microphone Preamplifier

• 377B02 1/2” Free Field Microphone with nominal sensitivity of

50 mV/Pa

• 377C20 1/2” Random Incidence Microphone with nominal sensi-

tivity of 50 mV/Pa

• 377C01 1/4” Free Field Microphone with nominal sensitivity of

2.16 mV/Pa (ADP043 adaptor required)

• 377C10 1/4” Pressure Microphone with nominal sensitivity of 1

mV/Pa (ADP043 adaptor required).

When the SoundAdvisor is first powered ON, the Live screen is displayed. When a measurement is in progress, the display is similar to Figure 2-5 Live Main Screen.

SoundAdvisor Model 831C Microphones and Preamplifiers 2-6

FIGURE 2-5 Live Main Screen

OBA Overload or Under Range icon

Tools menu icon

Run time of current measurement

Measurement status

Pages can be accessed using the up and down arrows

Measurement name of current running measurement

Data display

Session log, Overall, and other tabs can be accessed using the right and left softkeys

2.5.1 Measurement Data Tabs

TAKE NOTE There are seven

(7) tabs of measurement data. Live, Overall, and Session Log are default. To learn more about additional tabs see “Measurement Setup” on page 6-1.

Measurement data is presented on three (3) main screens called “tabs” that can be navigated using the top left/right softkeys:

Live

• Data is continuously displayed on this tab whether there is a mea-

surement running or not. Data displayed on the Live tab is not stored in the meter.

• Up to 13 pages of Live Measurement data

Overall

• Represents data measured and averaged beginning from the time

the measurement was started until the elapsed time indicated at the top of the display. If the measurement is stopped, the elapsed time will stop. Pressing the run key again will continue the measurement. As long as there is no reset, the same measurement is continued.

• Up to 20 pages of Overall Measurement data

Session Log

LEARN MORE To learn more

about the Session Log, see “Session Log Tab” on page 4-

16.

• A record of actions during a measurement. A time-stamped record

is made for every Run, Pause, Resume, Stop, and Sound Recording action. The source responsible for each action is also recorded. Resetting and storing data will clear the session record.

SoundAdvisor Model 831C Displays and Icons 2-7

FIGURE 2-6 Measurement Data Tabs

Live Tab’s Pages

Overall Tab’s Pages

2.5.2 Pages

TAKE NOTE You may not have

all the pages available on the SoundAdvisor. Additional

The Live and Overall tabs each have data displays called “pages” that can be accessed using the up 8and down 2 arrow keys. Figure 2-7

shows all the pages available for these tabs. pages of measurement data can be purchased through Larson Davis. “Contact Larson Davis” on page i-2.

FIGURE 2-7 Live and Overall Pages

SoundAdvisor Model 831C Displays and Icons 2-8

2.5.3 Status Bar Icons

Power Indicator

USB Memory Status

WiFi Status

OBA Indicator

SLM Indicator

Measurement Runtime

Run Status

File Name

FIGURE 2-8 Status Bar

Power Indicators

TAKE NOTE The battery icon

animates through the battery state cycle while charging.

The top status bar will alert the user the status of the meter, measurement,

connection, and battery.

Battery

The battery icon indicates the state of the battery charge by color and

volume. Figure 2-9 Battery States indicates all the states of the battery

going from fully charged to depleted, if read left to right. The bolt symbol

appears over the battery icon if the battery is currently charging.

FIGURE 2-9 Battery States

External Power

The external power connection icon appears when the SoundAdvisor is

powered from an external power supply or via the USB port.

FIGURE 2-10 External Power Icon

Battery Status Pending

While the SoundAdvisor is checking the battery status, this pending icon

will appear until the battery percentage is determined.

FIGURE 2-11 Battery Status Pending Icon

SoundAdvisor Model 831C Displays and Icons 2-9

WiFi Status

USB Memory Status

Input Overload Icon

See “WiFi” on page 13-2.

See “USB Drive Storage” on page 8-4.

When a signal from the preamplifier exceeds the calibrated input range of

the SoundAdvisor, the Input Overload icon will appear. While the

overload is present, the icon will flash.

If a measurement is running and an overload occurs, the icon shown

below will flash during the overload.

FIGURE 2-12 SLM Overload Icon

When the overload has been removed, the icon will still be present (not

flashing) to indicate that an overload has occurred during the

measurement. A reset will clear the icon from the display.

When using a microphone having a sensitivity of 50 mV/Pa, the input

overload will occur approximately as shown in Table 2.3.

Under Range Icon

Table 2.3 Input Overload Levels

Input Gain, dB Overload Level, dB Peak

0 143

20 123

When the signal from the preamplifier drops to the point where the noise

level of the instrument and the preamplifier influence the measurement,

an under range condition exists. When this happens the Under Range Icon

will appear.

FIGURE 2-13 Under Range Icon

As long as the under range condition exists, the icon will flash. When the

measured level no longer produces an under range condition, the icon will

be removed from the display.

At any time when a measured parameter is in an under range condition, its

numeric display will alter in color, as shown in Figure 2-14.

SoundAdvisor Model 831C Displays and Icons 2-10

FIGURE 2-14 Under Range vs. Normal Range Data Display

Under Range Display Normal Range Display

OBA Overload Icon

If the input to the Octave Band Analyzer becomes overloaded, the OBA

Overload icon will appear to indicate the overload.

FIGURE 2-15 OBA Overload Icon

Table 2.4 OBA Overload Levels

Input Gain, dB OBA Range Overload Level, dB

0 Normal 143

20 Normal 123

0 Low 110

20 Low 90

OBA Under Range Icon

This icon operates similar to the Input Overload Icon shown in the above

section “Input Overload Icon”.

When the OBA Range property is set to Low, the OBA Overload Icon

will activate at a level 33 dB lower than it would had the OBA Range

been set to Normal.

When using a microphone having a sensitivity of 50 mV/Pa, the input

overload will occur approximately as shown in Table 2.4.

When the signal from the preamplifier drops to the point where the noise

level of the instrument and the preamplifier influence the measurement,

an under range condition exists.

When all filters of the OBA are “under range” the OBA Under Range

Icon appears.

FIGURE 2-16 OBA Under Range Icon

SoundAdvisor Model 831C Displays and Icons 2-11

As long as this under range condition exists, the icon will flash. When the

Run

A measurement is currently running.

Stop

A measurement is stopped.

Reset

A measurement reset has occurred.

Run Pending

The meter is waiting for filters and detector initialization to complete and will automatically start the run when the system is stable (typically less than 10 seconds).

Pause

The present run is paused.

measured OBA levels no longer produces an under range condition, the

icon will be removed from the display.

Measurement Status

The state the meter is currently in will be indicated by a measurement

status icon. The measurement status is indicated by five icons for the five

states: run, stop, reset, pause, run pending.

FIGURE 2-17 Measurement Status Icons

If touch-screen is enabled, or you are operating the SoundAdvisor

remotely, touching the icon will change the status with the following

results:

Table 2.5 Touch Icon Results

Measurement State Action

Resulting

Measurement State

Run Press Once Stop

Run Double Tap Pause

Pause Press Once Run

Stop/Reset Press Once Run

Stop/Reset Double Tap Store

Run Pending N/A N/A

Power Save Press Once Run

SoundAdvisor Model 831C Displays and Icons 2-12

Analog Power Save Icon

LEARN MORE To learn more

about power saving options, see “Power” on page 9-3.

When the SoundAdvisor is not connected to a PC, it can be put in a power

saving mode that shuts down the analog circuitry, including the

preamplifier, to save battery power. The power save icon will be

displayed in the location where the measurement status icons appear.

FIGURE 2-18 Analog Power Save Icon

File Operation Icon

The file operation icon will appear on the status bar to indicate that a file

is currently being saved onto the USB, moved from the USB to meter, or

is being copied. All these operations are done in the Data File Manager,

see page 8-1. It is a standby icon that will disappear once the operation in

complete.

FIGURE 2-19 File Operation Icon

2.5.4 Display Menus

The SoundAdvisor features and functions are organized into three general

menus:

Main Menu

Accessed using the center softkey that indicates Menu

• Setup Manager

• Mark Sound Type

• Any Level Menu - Access on profile display by pressing 5

• Adjust Graph

• Print Screens (only available with printer inserted)

Tools Menu

Accessed using 3 Tools or the menu icon on the display

• Data File Manager

•Calibrate

• Setup Manager

• System Properties

• About

• Lock

SoundAdvisor Model 831C Displays and Icons 2-13

Any Level Menu

FIGURE 2-20 Any Level Menu

• System Utilities

• Communication

• Setup WiFi (if available)

Power Control

Accessed by pressing the 0 once

• Battery Information

•Display

•Off

• Reboot

To select which sound level parameter is to be used for the 2nd numerical

value displayed, press the 5 to open the menu.

Setup Manager

TAKE NOTE A new setup file

can be created using G4 LD Utility and then moved on to the meter.

TRY THIS Name a

measurement file using the on screen keypad that appears once you select the measurement name.

The Setup Manager is a platform that allows for measurements to be

made with preset settings in what are called “setup files” or “setups”.

From any tab or page on the meter, press the Menu soft key, select Setup

Manager. The first display is a list of the setup files currently available on

the meter. The Active setup is the current setup for all runs made. The

Default setup can be made active, and it cannot be removed or deleted.

Select Active and navigate to the different settings using top left and right

softkeys.

General

Name a measurement file, and add description.

SLM

Define the weightings, filters, and integration type for the measurement

sound levels.

OBA

Set the parameters for the real-time octave band frequency analysis.

SoundAdvisor Model 831C Displays and Icons 2-14

TAKE NOTE

Enabling some settings will open more pages under the tabs in the data display.

Define the Ln statistics.

Control

Define the way a measurement is performed, the timing, and the storage of measurement history records.

LEARN MORE For more

information on the Measurement Settings tabs and pages, “Measurement Setup” on page 6-1.

System Properties

LEARN MORE To learn more,

see “System Properties” on page 9-1.

Time History

Enable the time history and select the metrics that are stored in the time history.

Triggers

Define the levels at which noise exceedance events will be triggered

Event History

Define the timing and options for events.

Markers

Define the marker types and enable markers.

Day/Night

Define the time periods and level penalties for community noise metrics.

Sound

Set the quality of sound recording and enable its usage.

Weather

Set the weather station type and values of external transducers for the measurement of wind speed, wind direction, temperature and humidity.

Power

Define battery type, if the external power source should charge the battery, and features like auto-off, power-save, backlights, keypad backlight, LCD brightness, and the external shutoff voltage.

Preferences

Set mic correction, auto-store, the AC output, reset properties, data storage location, GPS mode, and the time zone correction.

Locale

Set language preference, decimal symbol, date format, and the units in which the measurement is displayed.

Displays

Define the default start display, and toggle between tabs to hide or show pages.

Options

Hide or show purchased options on the meter.

Network

View the 831 INT-ET IP address and the external Ethernet IP and MAC addresses. Enable Watchdog is also on this page.

SoundAdvisor Model 831C Displays and Icons 2-15

Indicate recipients for email alerts.

Other

Set the Logic In, Logic Out, and heater.

Reference Spectra

Set values for the reference spectrum.

Device

Enter 30 characters per field of device information that will appear on the About page under the Tools menu.

Time

Set timezone and date/time manually.

NTP

Add local or global NTP time servers for the most accurate time updates on the meter.

SoundAdvisor Model 831C Displays and Icons 2-16

Module 3 Getting Started

3.1 Unpacking & Inspecting ........................................................................................3-1

3.1.1 Serial Numbers ........................................................................................3-3

3.2 Connecting the Microphone & Preamplifier ........................................................... 3-3

3.3 Connecting the Preamplifier to SoundAdvisor ...................................................... 3-4

3.4 Disconnecting the Preamplifier ............................................................................. 3-4

3.5 Powering the SoundAdvisor ..................................................................................3-4

3.5.1 Battery Power ........................................................................................... 3-4

3.5.2 External Power ......................................................................................... 3-7

3.6 Turn the SoundAdvisor ON ................................................................................... 3-8

3.6.1 Turn the SoundAdvisor OFF .................................................................... 3-8

3.6.2 Power Display Pages ............................................................................... 3-8

3.7 Long Term Storage of SoundAdvisor ..................................................................3-10

3.1 Unpacking & Inspecting

TAKE NOTE Report any

damage or shortage immediately to PCB Piezotronics, Inc. See “Contact Larson Davis” on page i-2.

Table 3.1 SoundAdvisor Package

The SoundAdvisor is shipped in protective packaging. First, verify the

package contains the items listed below. Retain the packaging for safe shipment for calibration service. The SoundAdvisor should include:

SoundAdvisor

Model 831C

The 831C-FF and 831C-RI should include all from Table 3.1 and Table

3.2:

SoundAdvisor Model 831C Unpacking & Inspecting 3-1

PRM831 Microphone

Preamplifier

377B02 1/2 Inch

Microphone

Table 3.2 831C-FF Package

831C-CCS Hard Shell Case

PSA029 Universal AC

Power Adaptor

WS001 3 1/2 inch

Windscreen

Lanyard

4 - AA NiMH batteries

G4 LD Utility Software

SoundAdvisor Model 831C Unpacking & Inspecting 3-2

3.1.1 Serial Numbers

Table 3.2 831C-FF Package

Calibration Certification

TRY THIS Record the purchase

date, model and serial numbers for your instrument, preamplifier, and microphone in the spaces provided on the “Record of Serial Number and Purchase Date” on page i-2.

The SoundAdvisor model and serial numbers are printed on the label on the instrument’s back panel. The microphone model and serial numbers are engraved on the outside of the microphone. The preamplifier model and serial numbers are engraved on the outside surface of the preamplifier.

3.2 Connecting the Microphone & Preamplifier

CAUTION Always use care

when separating or connecting the microphone and preamplifier: Never use excessive force. Gripping tightly or screwing tightly is unnecessary. Do not remove the microphone grid cap and expose the diaphragm. The pogo pin is sensitive to static electricity. Avoid creating static shock when attaching the microphone by grounding yourself prior to assembly.

The bottom of the microphone attaches to the top of the preamplifier. The top of the preamplifier has a single gold pin and threads on the preamplifier body, designed to fit the 1/2 inch microphone.

FIGURE 3-1 Microphone and Preamplifier

Carefully place the bottom of the microphone over the top of the preamplifier. Gently screw the assembly together. The microphone body will seat smoothly against the preamplifier body. When removing the microphone, turn while gripping lightly the microphone body on the two engraved lines.

SoundAdvisor Model 831C Connecting the Microphone & Preamplifier 3-3

3.3 Connecting the Preamplifier to SoundAdvisor

Press here to release preamp from meter

CAUTION Do not attempt to

screw the preamplifier onto the SoundAdvisor.

The bottom of the preamplifier has a 5 pin connector that fits snugly into the top of the SoundAdvisor. The connectors are keyed for correct alignment; There is a vertical engraved line on the preamplifier which aligns with the arrow on the SoundAdvisor, these should be aligned before inserting the preamplifier.

Insert the preamplifier into the mating connector on the SoundAdvisor. Press the assemblies together until a small click is heard.

3.4 Disconnecting the Preamplifier

On the front surface of the SoundAdvisor, just below the preamplifier connector, is a small button. Press and hold this button while gently pulling the microphone/preamplifier assembly out of the SoundAdvisor.

FIGURE 3-2 SoundAdvisor Release Button

3.5 Powering the SoundAdvisor

To facilitate any task you may have with the meter, you can power the SoundAdvisor with battery power or use an external power supply.

3.5.1 Battery Power

CAUTION Do not mix Alkaline and NiMH batteries.

CAUTION Do not mix batteries from different manufacturers.

CAUTION Replace all four batteries when installing fresh cells.

CAUTION The correct battery type must be specified in System Properties,

SoundAdvisor Model 831C Connecting the Preamplifier to SoundAdvisor 3-4

as described in “Battery Type” on page 9-3.

CAUTION

Full Charge Low Charge

CAUTION A Session Log entry “Charging Stopped” can be resolved by

Do not charge non-rechargeable cells. Charge NiMH only.

checking the batteries and ensuring the correct battery type is selected. Battery may be too old to charge. Battery may be read as incorrect battery type, which may happen to fully discharged NiMH batteries. Use an external battery charger to restore charge, then install in meter. The batteries may be too hot or too cold, and the temperature may need to be brought between 0° C - 45° C.

The SoundAdvisor is compatible with the following batteries:

• Energizer, Duracell, and other nationally recognized brands:

• AA nickel metal hydride (NiMH)

• AA Alkaline

• AA 1.5 Volt Lithium

Battery voltage is displayed on the Power Control screen that can be accessed by pressing 0. The battery icon indicates the state of the battery charge by the color and fill of the battery icon.

FIGURE 3-3 Battery Status Icons

Low Battery

Install Batteries

As the battery nears end-of-life, the empty battery symbol will begin to flash. When the battery is at the end-of-life, the SoundAdvisor will stop running, save all data, and instrument status, then turn off. When the SoundAdvisor is turned on again, with fresh batteries or an external power supply, the unit returns to the state it was in when it shut down.

The battery compartment of the SoundAdvisor is on the back of the instrument. When installing batteries, always insert 4 fresh AA batteries. Regard polarity markings when inserted batteries.

SoundAdvisor Model 831C Powering the SoundAdvisor 3-5

FIGURE 3-4 Insert Batteries

Charging Batteries using the SoundAdvisor

When using NiMH batteries and powering the SoundAdvisor from either the computer (via USB port) or from the PSA029 power supply, or from another external source, the batteries can be charged inside the instrument.

TAKE NOTE The charge time to

completely recharge the cells is about seven hours when the instrument is powered off and using USB to charge.

SoundAdvisor Model 831C Powering the SoundAdvisor 3-6

To turn on charging follow these steps:

Step 1 On the SoundAdvisor meter, go to Tools menu  System

Properties. You can go to the Tools menu by pressing 3 on

the meter.

Step 2 Select battery type as NiMH.

Step 3 Charge will automatically set to On. If you do not want

your power source to charge your battery, set to Off.

Step 4 Select Save. A dialogue box will appear, select Ye s .

Charge Status LED

3.5.2 External Power

USB Port Power

The charge status indicated by an LED on 0 are as follows:

• LED 0 continuously lit: Charging

• LED 0 not lit: Not charging

• LED 0 winking: Charging stopped (battery fault)

• LED 0 fast blinking: meter is powering up or shutting down

The SoundAdvisor can be powered from a variety of sources including:

• USB port from a computer

• USB port from PSA029 power supply

• I/O port from PSA027 power supply (using CBL140 or CBL154)

• From an external +10.8 to +30 Volt mains power source

The SoundAdvisor can be powered via the USB port with the PSA029 external power supply. The mini USB Type B connector is located on the bottom of the meter.

CAUTION If the SoundAdvisor

is operated without batteries installed and power is interrupted, data may be lost.

Low Voltage Shutdown

Power Loss

With the PSA029 power supply connected and operating at rated conditions, the SoundAdvisor will operate properly with or without batteries installed.

The SoundAdvisor has a special feature to preserve the service life of an external battery by preventing it from being discharged excessively. When the battery voltage drops below the External Shutoff Voltage (default value +10.8 volts), but remains above +10.2 volts for one minute, the instrument will stop, save data and turn the SoundAdvisor off.

When the SoundAdvisor is powered from an external supply and the input voltage falls below the indicated External Shutoff Voltage threshold, it will power off. When the SoundAdvisor turns off due to a low battery, it will automatically turn on 6 hours later and remain on if there is adequate power. If the battery is still discharged, the SoundAdvisor will turn back off and try again in another 6 hours. This feature is designed to allow the SoundAdvisor to automatically restart when powering is lost do to low solar situation or after an extended power outage.

Sudden Loss of External Voltage

If the external voltage is suddenly lost, for example when the external supply is disconnected or when mains power fails and there is no external battery, the SoundAdvisor will continue to run on internal batteries if they are present and in good condition. If battery power is not present, the SoundAdvisor will immediately switch to an internal recovery battery and power down safely.

SoundAdvisor Model 831C Powering the SoundAdvisor 3-7

External Power Icon

Without internal batteries, the external power is supplied through the USB connector, the battery icon is replaced with the External Power icon, and the meter is no longer using batteries to power.

If your meter has fully charged NiMH batteries and plugged in to a power source, this icon will indicate that it is using power from the external source, as well as not charging and not depleting any power from the batteries.

FIGURE 3-5 External Power Icon

3.6 Turn the SoundAdvisor ON

After the SoundAdvisor is fully powered, either with an external power source or fresh batteries installed, it is time to power the meter on. Press the ON/OFF button 0 on the meter until the screen flashes and the green LED light under the button turns on; It will take a second.

3.6.1 Turn the SoundAdvisor OFF

The SoundAdvisor can be turned safely OFF after accessing the Power Control Page, see “Power Control Page” on page 3-8. Alternatively, pressing and holding the power button for three seconds will begin a safe shut down. Pressing and holding the power button for 10 seconds will force a hard shutdown.

3.6.2 Power Display Pages

There are several pages of power control and display.

Power Control Page

While the SoundAdvisor is powered on, the Power Control page can be accessed by pressing the 0 power button once. This is the best way to turn the meter off. Select Off to safely turn the meter off. Alternatively, press and hold the 0 power button for three seconds and it will power down safely.

SoundAdvisor Model 831C Turn the SoundAdvisor ON 3-8

FIGURE 3-6 Power Control Page

Battery “quick look”

Manage the display brightness and color theme

You can then use the top left softkey to select Off to power down the meter. This is the recommended method to powering down the meter.

The right softkey will reboot the meter

The current date and time can easily be seen on this page.

Voltage of the battery and the USB external power source can be tracked here.

Checking the internal temperature of the meter periodically is always good safety practice.

The internal memory information is also available on the Power page.

Power Page in System Properties

LEARN MORE For more

information on the Power page, see “Power” on page 9-

To change the battery type, auto-off and other features use the Power page. It can be accessed through the Tools  System Properties.

Power Page on the Live Tab

FIGURE 3-7 Power Page on the Live Tab

Under the Live tab, on the last page (a shortcut would be to navigate “up” instead of “down” on the Live tab to reach the Power page), there is the Power page. On this page you can see all the battery, voltage, and memory storage of the SoundAdvisor. Settings cannot be changed, only viewed on this page.

SoundAdvisor Model 831C Turn the SoundAdvisor ON 3-9

3.7 Long Term Storage of SoundAdvisor

CAUTION DO NOT use the

hardware power switch to turn the SoundAdvisor OFF. Permanent damage may occur. Press the 0 once and then select Off.

The Hardware Power Switch on the bottom of the SoundAdvisor disconnects the batteries from the SoundAdvisor hardware. The real-time clock will maintain its value while the switch is off. The power switch prevents battery drain when the meter is not in use for an extended period of time. If you plan to store the meter for more than two weeks, remove the batteries. If the switch is in the “ 0 ” position, the batteries are disconnected. After installing batteries be sure to move the switch to the “ | ” position. It should not be used to turn the SoundAdvisor ON and OFF. If the Hardware Power Switch is used to turn the SoundAdvisor OFF, data may be lost.

SoundAdvisor Model 831C Long Term Storage of SoundAdvisor 3-10

Module 4 Data Display

4.1 Overview ............................................................................................................... 4-1

4.2 Data Labels ........................................................................................................... 4-2

4.3 Live Displays .........................................................................................................4-2

4.3.1 SLM Page ................................................................................................4-2

4.3.2 Big Digit Sound Level ...............................................................................4-3

4.3.3 Octave Band Analyzer ............................................................................. 4-3

4.3.4 Normalized Octave Band .........................................................................4-4

4.3.5 Triggering .................................................................................................4-5

4.3.6 Preamplifier Interface Page ...................................................................... 4-5

4.4 Overall Displays .................................................................................................... 4-6

4.4.1 SLM Display .............................................................................................4-6

4.4.2 Big Digit .................................................................................................... 4-6

4.4.3 Leq ........................................................................................................... 4-7

4.4.4 Octave Band Analyzer ............................................................................. 4-7

4.4.5 Normalized Octave Band .........................................................................4-9

4.4.6 Ln Percentiles ........................................................................................4-10

4.4.7 1/3 Spectral Ln ....................................................................................... 4-11

4.4.8 Exceedances ..........................................................................................4-11

4.4.9 Overloads ...............................................................................................4-12

4.4.10 Community Noise ................................................................................... 4-12

4.4.11 C Minus A Impulsivity Page ...................................................................4-13

4.4.12 TA-Lärm ................................................................................................. 4-13

4.4.13 Sound Exposure Level Page ..................................................................4-14

4.4.14 Metrics Matrix Page ...............................................................................4-14

4.4.15 Power Page ............................................................................................ 4-15

4.5 Session Log Tab ................................................................................................. 4-16

4.6 Adjust Graph Scale .............................................................................................4-17

4.1 Overview

The SoundAdvisor takes a measurement, and simultaneously displays

that same information in a variety of ways. At the same time you can take a measurement and view:

• Sound metrics in real time

• Frequency of sound at each octave.

•Leq, LS, L

• Fast and Impulse detectors

• Temperature, GPS, and elevation that the sound was measured

• Sound weighted with specific values

of the overall or live sound

PEAK

SoundAdvisor Model 831C Overview 4-1

4.2 Data Labels

Aeq

, 1 second

averaging, using frequency weighting and detector selected in setup.

User-selected SLM parameter

The duration is only the duration of the current measurement.

Zpeak

using frequency

weighting selected in setup

4.3 Live Displays

The labels for sound metrics in the SoundAdvisor are designated by international standards. For many displayed values, the frequency and time weighting are indicated in the name of the metric. For example, LAS is the A-weighted sound pressure level measured using the Slow detector. Sound pressure level is often referred to as SPL.

LEARN MORE To learn about

the tabs, pages, and general overview of the display of the SoundAdvisor see “Displays and Icons” on page 2-6.

TRY THIS Use the 8 or 2

keys to navigate up or down through pages.

When the SoundAdvisor is turned ON, the default first display is the Live tab. The measurements displayed on the Live tab are always active, realtime measurements. The displayed values are not controlled by the 9 (RUN/PAUSE) key. This allows you to view the current SPL without disrupting any overall data.

For example, suppose you are making a measurement and an unwanted event takes place, causing you to stop the measurement. With the measurement stopped, you can monitor the actual level on the Live tab to be certain that the residual effects of the unwanted event have died down before beginning a new measurement.

4.3.1 SLM Page

FIGURE 4-1 Live Tab: Sound Level Profile Page

The profile page presents a recent history of L

Aeq

calculated for each

second. The graph presents the last 120 seconds of the measurement.

The first numerical level displayed, L recently graphed 1 second value. The frequency weighting, and possibly the detector, will correspond to those selected in setup for the RMS value.

(1s) in this example, is the most

Aeq

SoundAdvisor Model 831C Data Labels 4-2

TRY THIS

Current value Frequency weighting and detector defined from the setup, and updated once per second.

The SPL1 Trigger Level will turn orange when exceeded

Peak exceedance will gray out if it is under range

Date

Current time on the meter

While on this page,

press the 5 key, select a new parameter and look where the data is displayed.

User-Selected Parameter

FIGURE 4-2 User-Selected Menu

The 2nd numerical level display, L

in this example, corresponds to a

Aeq

user-selected parameter. The default value is LAS. The selection of this value is described in “User-Selected SLM Parameter” on page 5-3. The 3rd numerical level displayed, L

in this example, is the current

Zpeak

measurement from the 1s peak detector. The frequency weighting will correspond to that selected in setup for the peak value.

To select which sound level parameter is to be used for the 2nd numerical value displayed, press the 5 to open the menu.

4.3.2 Big Digit Sound Level

The big digit display is the easiest to observe both the instantaneous sound level and if the sound exceeds a trigger level that the user defines.

FIGURE 4-3 Live Tab: Big Digit Display Page

4.3.3 Octave Band Analyzer

TAKE NOTE This feature

requires the 831C-OB3 option.

There are four pages that relate to octave bands. The bands on the 1/1 Octave pages represent the bandwidth of one full octave, and the height of each band is amplitude of sound at that frequency. The 1/3 Octave band pages are similar, but each band represents a bandwidth of 1/3 octave.

SoundAdvisor Model 831C Live Displays 4-3

FIGURE 4-4 Live Tab: 1/1 Octave Band Page

Each band is one full octave that increases from left to right

Use the 4 and 6 keys to highlight the desired band and the numerical values below will reflect the information at that octave

Frequency weighting and detector

Frequency band level

The purple band on the far right represents an average sum of all the bands

Highlight the bands to change the numerical values accordingly by using the right and left arrow keys

Press 5 to jump to Ref, Set Reference, and back to the Octaves.

View References 1, 2, 3, 4, A, -A, C, and -C

Save the current selected values to use as a reference by selecting Set Reference.

4.3.4 Normalized Octave Band

TAKE NOTE The normalized

octave band pages are shown because on a setup OBA page, the Spectral Ln is turned ON

Similar to the regular octave band pages in display, the normalized band pages are showing octave bands and the numerical values of the highlighted band. However, the data is normalized using a selected reference spectrum.

FIGURE 4-5 Live Tab: Normalized Octave Band Page

TAKE NOTE The reference

spectra can be configured by navigating Tools Menu 

System Properties  Reference Spectra.

SoundAdvisor Model 831C Live Displays 4-4

4.3.5 Triggering

Current live sound

When the SPL1 & SPL2 triggers are exceeded they will change from white to orange and red respectively.

The L

Zpeak

of the

measurement.

If the sound levels go higher than the Peak triggers the numerical values will turn from white to orange and red respectively.

Preamplifier currently connected

The voltage of the preamplifier connected is shown in VDC

When a 426A12 is installed this page will provide information like temperature and humidity as well as desiccant maintenance information

FIGURE 4-6 Triggering Page

After indicating the decibel of a trigger on a setup, view this page to show when the trigger has been exceeded.

4.3.6 Preamplifier Interface Page

FIGURE 4-7 Preamplifier Interface Page

The information on the preamplifier interface page is used to validate the proper operation of the meter.

SoundAdvisor Model 831C Live Displays 4-5

4.4 Overall Displays

Run time of current measurement. The time will continue during a pause.

Leq value is using the frequency weighting and detector from setup. It is the equivalent sound based on the run time of the measurement.

The left side is the start of the measurement, and it ends on the right side.

This is the user-selected SLM parameter. To change press 5

Leq using frequency weighing and detector indicated

User defined SPL1 Trigger Level and the percentage of time the overall measurement was over the trigger level

Maximum sound level during measurement

Peak level reached during measurement

Run time

Time since pause was initiated. The time will continue each time you pause a measurement, not restart.

TAKE NOTE Not all the pages

available will be covered in this section, as they are optional. To inquire about more functionality, “Contact Larson Davis” on page i-2.

The Overall tab is similar to the Live tab, with an SLM page and subsequent pages showing sound data, except that the Overall tab is showing the data collected from a current measurement. The overall data will continue to collect until the measurement is stopped and saved, or a reset has occurred.

4.4.1 SLM Display

FIGURE 4-8 Overall Tab: SLM Page

4.4.2 Big Digit

FIGURE 4-9 Overall Tab: Big Digit Page

SoundAdvisor Model 831C Overall Displays 4-6

4.4.3 L

Aeq

and the LAS of the overall

measurement

The L

Zpeak

(Z frequency

weighting) is the overall reading of the peak detector during the measurement.

These three SPL detectors give the date and time during the measurement that the triggers were met.

This run time stops during a pause or stop.

FIGURE 4-10 Overall Tab: Leq Page

4.4.4 Octave Band Analyzer

TAKE NOTE The octave band

pages are shown because the 831C-OB3 has been purchased, and on a setup OBA page, the Bandwidth is turned ON.

Zpeak(max)

The highest level the peak detector has measured during the run time of the measurement. A date and time of occurrence is recorded with this event. It’s considered the peak hold.

ASmax

The highest level the SPL detector has measured during the run time of the measurement. It’s considered the max hold.

ASmin

The lowest level the SPL detector has measured during the run time of the measurement. A date and time of occurrence is recorded with this event.

There are four pages that relate to octave bands. The bands on the 1/1 Octave pages represent the bandwidth of one full octave, and the height of each band is the frequency at which that sound is at that particular octave. The 1/3 Octave band pages are similar, but each band represents a bandwidth of 1/3 octave.

LEARN MORE To learn more

about the octave band pages, see “Octave Band Analyzer” on page 4-3.

The Overall Tab’s octave band pages only show the data since the first run was initiated and clear after a reset. The numerical values are color coded to assist in determining where the numerical values are in each octave band. For example, the blue box next to the L blue bands are the same data.

data indicates that the

Aeq

SoundAdvisor Model 831C Overall Displays 4-7

FIGURE 4-11 Overall Tab 1/1 Octave Band Page

Table 4.1 Overall Octave Band Colors

max

“Leq” is the average sound level of the highlighted frequency band for the duration of the measurement.

is the maximum sound level of the highlighted

max

frequency band. The maximum spectrum is determined by the Max Spec setting.

Bin Max

When set to Bin Max, it is the maximum value which occurred during the entire measurement for that frequency band. Since individual frequency bands may reach their maximum levels at different times, this spectrum might be one which never occurred at any instant during the measurement period.

At Max

When set to At Lmax, it is the instantaneous spectrum at the moment when the broadband maximum occurred (such as LSmax).

min

SoundAdvisor Model 831C Overall Displays 4-8

is the minimum sound level of the highlighted

min

frequency band for the duration of the measurement. Since individual frequency bands may reach their minimum levels at different times, this spectrum might be one which never occurred at any instant during the measurement period.

4.4.5 Normalized Octave Band

Highlight the bands to change the selected frequency by using the left and right arrow keys

Press 5 to jump to Ref, Set Reference, and back to Octaves

Set Spectra by selecting Set Reference after making changes to the weighting and reference.

The user defined references are determined by navigating Tools Menu

System Properties Reference Spectra

Similar to the Octave Bands pages in display, normalized band numerical values of the highlighted band. The data is then normalized using a Spectral Ln indicated in a setup.

FIGURE 4-12 Overall Tab: Normalized Octave Bands

Table 4.2 Reference Spectra Options

User Defined 1 2 3 4

Positive Frequency Weighting A C

Negative Frequency Weighting -A -C

In the case that the frequency components are too small or large, use the Adjust Graph function described in “Adjust Graph Scale” on page 4-17.

SoundAdvisor Model 831C Overall Displays 4-9

4.4.6 Ln Percentiles

TAKE NOTE The Ln percentile

levels can be adjusted on the Ln page of the setup. Setup

Manager Ln Percentiles.

LEARN MORE L

NF50

= 39.9 dB means that the Fast (F) time weighted level exceeded 39.9 dB 50% of the time.

FIGURE 4-13 Overall Tab: Ln Percentiles Page

An Ln is a statistical measurement of the level that is exceeded “n” percent of the time. The statistics are based on the level defined by the current weighting and detector.

The Ln Percentiles page displays the Ln statistics for the measurement based on the run time. Also shown are the maximum and minimum sound levels measured.

The values of Ln are calculated from an amplitude distribution table, ranging from 0 to 200 dB, in 0.1 dB increments. As a result, it is possible to calculate Ln values from values of n ranging from 00.01% to 99.99%.

The values shown represent the six values which were selected for display on the setup. At any time during a measurement, any or all of these Ln values can be changed, so that Ln values corresponding to different values of n may be displayed.

SoundAdvisor Model 831C Overall Displays 4-10

4.4.7 1/3 Spectral Ln

Ln as a function of frequency for the six user-selected values of n

Frequency at highlighted band

Ln values at highlighted band

During the exceedance After the exceedance

FIGURE 4-14 Overall Tab: 1/3 Spectral Ln

TRY THIS Using the 4 and 6

keys, move the highlighted band to show the values for a different octave.

4.4.8 Exceedances

TAKE NOTE The exceedance

levels are determined as triggers during a setup. They can be adjusted on Setup Man- ager Triggers.

An exceedance occurs when the level defined by the current weighting and detector exceeds a present trigger level. The exceedances page has two LAS and three Lpeak exceedance values, and each time one of them is exceeded during a run it will add to the counter, and turn the numerical value orange or red.

FIGURE 4-15 Overall Tab: Exceedances Page

SoundAdvisor Model 831C Overall Displays 4-11

4.4.9 Overloads

The Overloads page shows the number of times, the percent of time, and the amount of time that the Sound Level Meter and the OBA have been overloaded.

FIGURE 4-16 Overall Tab: Overloads Page

4.4.10 Community Noise

TAKE NOTE The metric CNEL

is equivalent to LDEN.

FIGURE 4-17 Overall Tab: Community Noise Page

The Community Noise page displays the values LDN and LDEN which are commonly used to evaluate community noise. Since community noise metrics are based upon full day measurements, they do not present valid data for measurements less than 24 hours duration.

LEARN MORE For the formulas

used to determine the LDEN, see “Day/Night” on page 6-8.

SoundAdvisor Model 831C Overall Displays 4-12

LDEN

Although the standard ISO 1996-2:2007 specifies default values used in the calculation of LDEN, in practice the time values defining the day,

evening and night periods may be changed, as permitted by Directive 2002/49/EC of the European Parliament and of the Council of 25 June 2002 relating to the assessment and management of environmental noise. It is important to verify prior to measurement that the values have been properly defined for your purposes. The values can be adjusted on the

setup, navigate Setup Manager Day/Night.

4.4.11 C Minus A Impulsivity Page

The “C minus A” metric provides an indication of the low frequency content of noise measured by subtracting the A weighted equivalent level from the C-weighted equivalent level. The integrated levels for LAeq are always calculated using the linear detector, regardless of the value selected in the SLM Setup. The LAIeq value is from the impulse detector.

FIGURE 4-18 C Minus A Impulsivity

4.4.12 TA-Lärm

This metric is primarily used in Germany. To turn off this display, or any other display that is not related to your measurement, see “Displays” on page 9-10.

SoundAdvisor Model 831C Overall Displays 4-13

FIGURE 4-19 TA-Larm

4.4.13 Sound Exposure Level Page

FIGURE 4-20 Sound Exposure Level Page

4.4.14 Metrics Matrix Page

The metrics matrix page shows all the data the meter is always measuring in one page. You can use the 5 key to move the cursor and enable more information to appear, like to see when a peak was measured.

SoundAdvisor Model 831C Overall Displays 4-14

FIGURE 4-21 Metrics Matrix page

The time is currently synced with NTP servers.

4.4.15 Power Page

The power page on the Overall tab will show all the records for that measurement, in addition to the memory used on the meter.

FIGURE 4-22 Overall Power Page

SoundAdvisor Model 831C Overall Displays 4-15

4.5 Session Log Tab

The Session Log is a record of data accumulation actions and indications of errors. Resetting and storing data will clear the session record. A timestamped record is made for every Calibrate, Run, Pause, Resume, Stop, Voice Message and Sound Recording etc. action. The source responsible for each action is also recorded. Actions include the following:

• Key press

• Measurement Stop

• Measurement Run

• Measurement Pause

• Resume from Pause

• Measurement reset

• Calibration record and change

• Back-erase

• Marker set

• Run timer complete

• GPS Time Sync

• Low battery

• Charging Stopped

• Out of memory

• Preamplifier connect/disconnect

• Create new average

• 831 INT-ET (Communication Failure)

• USB Connection detected

• NTP Time Sync

• System time change

SoundAdvisor Model 831C Session Log Tab 4-16

FIGURE 4-23 Session Log

A calibration occurred

The measurement was paused

A run was initiated

There was a time sync

Each highlighted entry will indicate if it was a key press, IO command, battery information, etc.

Back-erase occurred

4.6 Adjust Graph Scale

FIGURE 4-24 Adjust Graph

The default amplitude (dB) setting for the graphic display of sound pressure level versus time and frequency spectra are as indicated in the table:

Table 4.3 Default Settings for the Graphical Display

Level vs. Time Graphs 20 dB to 140 dB

Frequency Spectra, Normal Range 20 dB to 140 dB

Frequency Spectra, Low Range -10 dB to 110 dB

To change the scaling of any one of these graphs, navigate Menu  Adjust Graph. Use your right and left navigation keys to select a new Y Max and Y Min, then press 5 to save.

SoundAdvisor Model 831C Adjust Graph Scale 4-17

Module 5 Calibration

5.1 Calibration Overview ............................................................................................. 5-1

5.2 Calibration Displays .............................................................................................. 5-2

5.2.1 Calibrate Page .........................................................................................5-2

5.2.2 Calibration Settings .................................................................................. 5-3

5.2.3 Calibration History ....................................................................................5-3

5.2.4 Calibration Certification ............................................................................ 5-4

5.3 Choosing a Calibrator ........................................................................................... 5-5

5.4 Performing a Calibration ....................................................................................... 5-6

5.1 Calibration Overview

Sensitivity Determination

The primary role of sound level meter calibration is to establish a numerical relationship between the sound level at the diaphragm of the microphone and the voltage measured by the meter so that the sound pressure level can be read directly from the display of the meter in units of dB. The result of a calibration is the determination of the sensitivity of the meter, including microphone and preamplifier, typically in units of dB re 1V/Pa or mV/Pa.

Overload/Under Range Conditions

A secondary role of calibration is to determine the sound level which would overload the instrument and the minimum sound level which can be accurately measured, referred to as the under range level. This requires knowledge of the electrical noise levels of the microphone, preamplifier and the instrument circuitry.

Calibration Stability

The SoundAdvisor maintains a stable value of sensitivity over long periods of time. Significant changes in sensitivity, or a pattern of small but regular sensitivity changes, are indicative of problems with the measurement system. To assist you in identifying these situations, the SoundAdvisor provides two notifications:

1. Calibration History Data and date/time of the ten most recent ten calibrations

2. Large Change Notification During calibration, an automatic comparison is made between the sensitivity determined by the calibration and the previous value. A warning will appear when the difference between these two values exceeds 3 dB.

SoundAdvisor Model 831C Calibration Overview 5-1

5.2 Calibration Displays

Select the correct calibrator you will be using for the calibration.

Turn the calibrator on, place over microphone, and press Do Calibra- tion to begin.

The microphone type, sensitivity, and peak overload values are available on this page

The under range and noise floor capabilities.

LEARN MORE Calibration

Histories can be viewed in more detail using G4 LD Utility.

5.2.1 Calibrate Page

FIGURE 5-1 Calibrate

The Calibrate function has four pages: Calibrate, Calibration Settings, Calibration History, and Calibration Certification. Before performing a calibration, visit all pages and ensure that the settings are correct, this will prevent any errors that may occur. To access the calibration functions on the SoundAdvisor, navigate Tools Menu Calibrate.

Under Range

The Under Range Level is the higher of the following:

1. Noise Floor plus 9.14 dB (under range shown when self noise contributes ≥ 0.5 dB to the readings).

2. Actual point where the log-linearity exceeds maximum permitted value. Except for very low noise level microphones, the under range level is usually determined by the noise floor plus 9.14 dB.

Noise Floor

The noise floor is calculated as the energy sum of microphone self noise, preamplifier self noise and instrument self noise. The appropriate noise floor, as well as the nominal sensitivity, is computed automatically in the SoundAdvisor with the following preamplifiers and their commonly paired microphones:

• PRM831

• PRM2103

• 426A12

SoundAdvisor Model 831C Calibration Displays 5-2

5.2.2 Calibration Settings

Select the microphone that is installed on your meter

The calibrator used may have different settings and if so, can be edited manually and saved.

Sensitivity data is prepopulated based on your microphone. The actual value is calculated when the 831C is calibrated.

If the microphone type is not found, or in special cases, select Other and manually enter sensitivity.

For every instance of calibration a log entry is made

The difference between the level measured during the calibration and the level of the previous calibration is the Delta dB

The sensitivity is in dB re 1 V/Pa

FIGURE 5-2 Calibration Settings

• ICP with ADP074

When a calibration has been performed using any of preamplifiers listed above, that calibration information is saved for that preamplifier. If the preamplifier is switched out and replaced with a different type of preamplifier, then the calibration information already saved for that new preamplifier type is used. As long as the same microphone is being used with that preamplifier, the calibration should be correct.

5.2.3 Calibration History

FIGURE 5-3 Calibration History

SoundAdvisor Model 831C Calibration Displays 5-3

Select a log entry and a calibration spectra box will appear.

The date of the last certification and the due date for the next certification.

The certification interval can be changed to reflect your own certification time line.

A reminder will be displayed as a popup X number of days before the interval time has expired.

FIGURE 5-4 Calibration Spectrum

5.2.4 Calibration Certification

A certification interval of one year is recommended, but this can be lengthened, shortened, or disabled depending on the applicable requirements.

FIGURE 5-5 Calibration Certification

SoundAdvisor Model 831C Calibration Displays 5-4

5.3 Choosing a Calibrator

TAKE NOTE If using a 1/4 inch

microphone an adaptor ADP024 is required.

FIGURE 5-6 Larson Davis CAL200

Larson Davis recommends the following calibrator for the SoundAdvisor:

The following instances will require a correction:

• Larson Davis Model CAL200: 94/114 dB @ 1 kHz

• Using Free Field Microphone

• Check calibration data shipped with calibrator

• The calibrator and instrument are at a temperature other than room

temperature (23° C) or not near sea level.

• Check calibration data shipped with calibrator

• The instrument is used in one environment and moved to another

(e.g. meter moved to or from 85 kPa static pressure elevation)

• Calibration check will need to be done in new environment.

SoundAdvisor Model 831C Choosing a Calibrator 5-5

5.4 Performing a Calibration

LEARN MORE Refer to the

calibrators operating instruction for more information.

Step 1 Navigate Tools MenuCalibrate.

Step 2 Select calibrator from drop down menu that matches your

own. The Other option can be configured in the “Calibration Settings” on page 5-3.

Step 3 Carefully insert the 1/2” microphone into the 1/2”

microphone opening at the bottom of the calibrator.

Step 4 Turn calibrator ON. The calibrator will turn off after one

minute, so use within that time, or press the button again.

Step 5 Select Do Calibration button on SoundAdvisor.

Step 6 Select Yes when complete.

The calibration is now complete.

If there is an error message, then the calibration is suspected to have been performed incorrectly. If an error message is received, check all settings and perform the calibration again, ensuring the calibrator is turned ON.

SoundAdvisor Model 831C Performing a Calibration 5-6

Module 6 Measurement Setup

6.1 Overview ............................................................................................................... 6-1

6.2 Setup Manager ...................................................................................................... 6-2

6.2.1 General .................................................................................................... 6-3

6.2.2 SLM .......................................................................................................... 6-4

6.2.3 OBA .......................................................................................................... 6-5

6.2.4 Ln Percentiles ..........................................................................................6-5

6.2.5 Control ...................................................................................................... 6-6

6.2.6 Triggers .................................................................................................... 6-7

6.2.7 Day/Night ................................................................................................. 6-8

6.3 Default to LD Default Setup .................................................................................. 6-9

6.4 User Defined Setup ............................................................................................... 6-9

6.5 Exiting the Setup Manager ..................................................................................6-10

6.1 Overview

The SoundAdvisor makes measurements based on values indicated in a

Setup File (setup). The setups are managed in the Setup Manager.

TAKE NOTE Any setup can be

created and stored on the SoundAdvisor or in G4 LD Utility.

This module describes how to edit the Active setup for quick use and how to create a user-defined Setup File.

The SoundAdvisor can make a number of measurements for your specific task by defining a setup, including the following types:

•L

• 1/1 and/or 1/3 octave real-time spectra

• Six values of Ln based on six user-selected values of the

• Count of the number of times the levels (SPL and Peak) exceed

• Sound exposure and sound exposure level data

, L

frequency weighting and detector

peak

frequency weighting

percentage parameter n

user-selected values

max

and L

, L

min

peak(max)

corresponding to user-selected values of

corresponding to a user-selected value of

SoundAdvisor Model 831C Overview 6-1

6.2 Setup Manager

The Active setup is the measurement settings currently active on the SoundAdvisor.

Navigate to the settings pages by using the top left and right softkeys. The pages to the right and left are indicated at the bottom.

The Default setup will restore all active properties to the factory default values. It is Read-Only and cannot be deleted.

TAKE NOTE If the

SoundAdvisor is connected to G4, when you load the Setup Manager, a dialogue box may appear “Setting in use by another connection. Continue?” If you create a setup or make changes on the meter, Refresh List in G4 to sync changes.

FIGURE 6-1 Setup Manager

All the measurement settings can be found in the Setup Manager. It can be accessed by going to any menu and then selecting Setup Manager. The first page displays the Setup Files (setups) currently saved on the meter. Active and Default will always be present on the meter.

The settings are organized into tabs that can be accessed using the left and right softkeys from the main Setup Manager view. Navigate back to the Setup Manager page to be prompted to save or discard any changes made.

The first page of the Setup Manager shows all saved setup files currently on the SoundAdvisor. Any other setup files listed may be activated, edited, and/or deleted. To activate a setup file, select the setup file and choose Set to Active.

Before defining any settings or settings values in a setup, it is good practice to set the Default to Active to clear any user defined settings. See “Default to LD Default Setup” on page 6-9.

SoundAdvisor Model 831C Setup Manager 6-2

FIGURE 6-2 Setup Manager Menu

By selecting any of the setup files, a Menu will appear.

This is how you create a new setup. First select

Default then choose Save As.

You cannot delete or rename Active or Default.

Any changes that are made but not shown may be a symptom of a sync issue, Refresh List will fix this issue.

You can set any setup file to active, or to restore to default settings, set the Default setup to active.

Enter a file name that will appear in the file name field on the meter, and all measurement data files saved will have this name as a pretext.

Enter up to 250 characters describing the specifics of this measurement setup. The description will appear in the downloaded data files.

6.2.1 General

FIGURE 6-3 Setup Manager: General Settings

TRY THIS While on the meter,

select a text field and a keyboard will appear to assist in entering text.

SoundAdvisor Model 831C Setup Manager 6-3

6.2.2 SLM

The weighting for the measurement can be made in A (default), C, or Z.

Detectors affect how quickly the sound is being measured. It can be changed to slow, fast, or impulse.

The default peak weighting is Z, but can be changed to A or C.

20 dB Gain can be checked when measuring low level sounds, or when the sound level is near background noise level. Uncheck to set gain to 0 dB.

FIGURE 6-4 Setup Manager: SLM Settings

The integration method has two options:

Linear

This is the default and most used integrating method. Linear integrates only the energy during a given period of time. It does not show a decay slope of a fast, slow, or impulse exponential detector.

Exponential

Exponential integration shows a long decay of energy after an impulse, and it may hide small events or loud impulsive events. This integration is not commonly used. In addition, if performing time history measurements of 10 ms or less, linear must be used and not exponential.

Although the 831C measures levels at all three detector settings and frequency weighting settings, some features require a single combination. The level defined by the detector and frequency weighting selected is used for the computation of Ln, exceedances, sound exposure, and events.

SoundAdvisor Model 831C Setup Manager 6-4

6.2.3 OBA

Normal (120 dB full scale) and High (140 dB full scale)

Select 1/1 Octave bandwidth, 1/3 Octave bandwidth, or both simultaneously.

Choose the weighting for the 1/1 Octave and/or 1/3 Octave bandwidth frequency analysis: A, C, Z.

Spectral Ln values can be measured using 1/1 or 1/3 octave bandwidths. If both 1/1 and 1/3 are selected, Spectral Ln will only measure for 1/3 bandwidth.

FIGURE 6-5 Setup Manager: OBA Settings

TAKE NOTE For measurement

The Maximum Specification has two options: range specifications, see Table A.3, “Table A.3 Octave Band Analysis 1/1 Octave Linearity Range,” on page A-

Bin Max

When set to Bin Max, it is the maximum value which occurred during the

entire measurement for that frequency band. Since individual frequency

bands may reach their maximum levels at different times, this spectrum

might be one which never occurred at any instant during the measurement

period.

At Lmax

When set to At L

the broadband maximum occurred (such as L

, it is the instantaneous spectrum at the moment when

max

ASmax

6.2.4 Ln Percentiles

The Ln value is the sound level that has exceeded n% of the total

measurement time. For example, a value of n=90%, a displayed value for

L90 of 35dB means that for 90% of the measurement period the dB level

was at or above 35dB. These statistical values are commonly used to

SoundAdvisor Model 831C Setup Manager 6-5

describe the characteristics of non-steady sound such as environmental

noise.

In order to be able to calculate Ln values, the SoundAdvisor creates an

amplitude distribution table over the range 0 to 200 dB, in amplitude

increments of 0.1 dB. This data permits the calculation of Ln values for

any value of n in the range 00.01 to 99.99%.

FIGURE 6-6 Setup Manager: Ln Percentiles Settings

Default values of Ln

TAKE NOTE You can edit the

values of Ln during a measurement and view it without stopping or pausing the run.

6.2.5 Control

The SoundAdvisor has six run modes to control the time duration of a

measurement. The most simple are Manual Stop, Timed Stop, and Stop

when Stable. The more advanced are the Continuous, Single Block Time,

and Daily Timer modes.

FIGURE 6-7 Setup Manager: Control Settings

Manual Stop

The measurement is initiated manually.

SoundAdvisor Model 831C Setup Manager 6-6

Timed Stop

SPL Trigger Levels: When the measured SPL (Slow, Fast, or Impulse) exceed the trigger level, the event begins. The SPL used is defined by the current weighting and detector.

Peak Trigger Level: Three levels can be set independently from the SPL triggers. The peak has a fast response time, these triggers can identify impulsive noises (e.g., gun shots) which would normally not be recorded.

The measurement is initiated manually, and will stop automatically after a

user-defined period of time.

Stop When Stable

Set a dB and time for a stability parameter and if detected, the

measurement will stop.

Continuous

Upon booting up the meter, a measurement will automatically run for

user-defined time and will store data at user-defined times. Continuous

mode will resume automatically after 5 minutes into a Pause.

TAKE NOTE When combined

with the Measurement History feature, these modes produce a sequence of measurements made and stored at regular time intervals.

Single Block Timer

One measurement will automatically start and stop at user-defined times.

Daily Timer

One or more measurements will start and stop at user-defined times, at

daily intervals. This mode is often used to make a work area survey that

follows a worker’s daily schedule.

6.2.6 Triggers

Triggers specify the instances where the measured sound level exceeds a

user-defined parameter. Triggers are used for events, exceedances, and

alert emails.

The event is initiated when the sound level rises above the trigger level

and ends when the sound level drops 2 dB below the trigger level. This

hysteresis is to avoid the creation of multiple exceedances when the sound

level is fluctuating about the threshold.

FIGURE 6-8 Setup Manager: Trigger Setting Page

SoundAdvisor Model 831C Setup Manager 6-7

FIGURE 6-9 Triggers Graph

6.2.7 Day/Night

Although the standard ISO 1996-2:2007 specifies default values used in

the calculation of LDEN, in practice the time values defining the day,

evening and night periods may be changed. This is permitted by Directive

2002/49/EC of the European Parliament and of the Council of 25 June

2002 relating to the assessment and management of environmental noise.

It is important to verify prior to measurement that the values have been

properly defined for your purposes.

FIGURE 6-10 Setup Manager: Day/Night Settings Page

The default day/night level LDN is defined by a specific formula, see

“Day-Night Average Sound Level (DNL, Ldn)” on page C-3.

DEN

The default day-evening-night level LDEN is defined by a formula, see

“Community Noise Equivalent Level (CNEL, Lden)” on page C-2.

SoundAdvisor Model 831C Setup Manager 6-8

6.3 Default to LD Default Setup

The Default setup is the factory measurement settings for the

SoundAdvisor. It is read-only and cannot be deleted. If set to Active, it

will restore the settings to the factory default values.

To set to active, navigate to the Setup Manager through either the Tools

Menu or Main Menu and then select the Default setup by pressing enter.

Then select Set to Active.

6.4 User Defined Setup

TRY THIS Use the Setup Man-

ager in G4 LD Utility to manage setups, store setups, and transfer them to and from the SoundAdvisor.

TAKE NOTE If settings are

changed in the Active setup, they will not be saved in your new setup. Change settings on your setup, then set to Active for optimal operation.

While measurements can be made by defining values on the Active setup,

you can also save all your settings in a user-defined setup. The setup can

be stored and called to Active at anytime. This setup can be transferred to

a PC, and then transferred to a different SoundAdvisor as well.

Follow these steps to create a user-defined setup:

Step 1 Navigate to any menu on the SoundAdvisor (Tools or Main),

then select Setup Manager.

Step 2 Select the Active setup.

Step 3 Select Save As.

Step 4 Enter name of your setup. Select OK.

Step 5 Your setup can be made Active by selecting and Set to

Active.

To know which setup you are making changes to, see the top right of the

screen to see the name of your setup:

SoundAdvisor Model 831C Default to LD Default Setup 6-9

FIGURE 6-11 Settings: Setup Name

6.5 Exiting the Setup Manager

To exit Setup Manager, select Close.

TAKE NOTE If settings have

been changed that you want to save, you will need to select

Close to save.

FIGURE 6-12 Setup Manager Save Prompt

A dialogue box will appear. Selecting Ye s will save and close. Selecting

No will not save, and return you to the main Setup Manager screen, where

you can then choose Close. If you select Cancel you will return to the

previous without saving or closing.

SoundAdvisor Model 831C Exiting the Setup Manager 6-10

Module

7.1 Overview ............................................................................................................... 7-1

7.2 Before You Start .................................................................................................... 7-2

7.2.1 Position the SoundAdvisor .......................................................................7-2

7.2.2 Area Sound Field Check .......................................................................... 7-3

7.3 Performing the Measurement ................................................................................7-4

7.3.1 Pausing the Measurement ....................................................................... 7-5

7.3.2 Resetting a Measurement ........................................................................7-7

7.3.3 Stopping the Measurement ......................................................................7-7

7.4 Storing the Measurement ......................................................................................7-7

7.5 Low Level Sound Fields ........................................................................................ 7-8

7 Making a Measurement

7.1 Overview

Making a measurement on the SoundAdvisor can be as simple as viewing a live

reading of the area using the Big Digit display, or as sophisticated as setting it up with environmental accessories, deploying it in the field, and logging measurements when the sound level is above 80 dB over the course of many months in all weather conditions. For both tasks, understanding the basics of measurement making is essential.

Quick Measurement Steps:

Step 1 Power On the SoundAdvisor

Step 2 Navigate to Overall display.

Step 3 Press Run 9.

Step 4 When finished, press Stop 7.

Step 5 Press Store 7 and save your data file.

SoundAdvisor Model 831C Overview 7-1

7.2 Before You Start

Before performing a measurement, follow these steps to ensure the

measurement is performed properly:

LEARN MORE Each step has a

link to the first 6 Modules in the manual, and if read through, will lead to optimal performance of the SoundAdvisor.

Step 1 Connect preamplifier and microphone to the SoundAdvisor.

Step 2 Turn Meter ON 0.

Step 3 Navigate to Setup Manager and indicate or check all values

Step 4 Calibrate the meter.

7.2.1 Position the SoundAdvisor

The best position for sound recording is to mount the SoundAdvisor on a

tripod. If held in hand, position your body away from and on an angle to

the meter to minimize interference of the sound field at the microphone

resulting from body reflections. The microphone should be angled away

from the body.

If using a free-field microphone like the 377B02, the meter should be

“pointed” at the sound source being measured.

For complete instructions, see “Connecting the Preamplifier to SoundAdvisor” on page 3-4

For complete instructions, see “Turn the SoundAdvisor ON” on page 3-8

desired for your measurement. For complete instructions, see “Setup Manager” on page 6-2

For complete instructions, see “Performing a Calibration” on page 5-6

FIGURE 7-1 Optimal Hand Held Position

SoundAdvisor Model 831C Before You Start 7-2

Microphone Extension Cable

TAKE NOTE Always position

the preamplifier/microphone in a way to minimize the effect of reflections on the sound field near the microphone.

Windscreen

FIGURE 7-2 Windscreen

A shielded microphone extension cable may be placed between the meter

and the preamplifier/microphone if needed for the measurement position.

No correction is necessary when using Larson Davis Model EXCXXX

microphone extension cables in combined lengths up to 200 feet. XXX is

the length in feet (XXX = 010, 020, 025, 035, 050, 060, 100 and 200)

available.

Wind blowing across the microphone generates pressure fluctuations on

the microphone diaphragm which can produce errors in the measurement.

As a result, when performing measurements in the presence of low level

airflows, it is recommended that a windscreen be placed over the

microphone. Larson Davis provides the WS001 windscreen, a 3 1/2”

diameter ball made of open cell foam which can be placed over the

microphone and preamplifier.

7.2.2 Area Sound Field Check

Starting a measurement during a dramatic sound change can affect your

data in an unwanted way. Before starting any measurement, check the

area sound field by navigating to Live on the meter and ensuring your

measurement is ready to begin.

While every task is unique, the following scenario is standard for a basic

measurement:

SoundAdvisor Model 831C Before You Start 7-3

• The live sound is steady and within range. See “SLM Performance” on page A-2 and “Low Level Sound Fields” on page 7-8.

• The time reads 00:00:00.0 on both the Live and Overall displays. (Otherwise the previous measurement was not stored or reset.)

• The measurement status icon is set to Stop.

For more information, see “SLM Page” on page 4-2

FIGURE 7-3 Standard Area Sound Field Before Measurement

7.3 Performing the Measurement

LEARN MORE To learn more

about the displays and icons, see “Displays and Icons” on page 2-6

Keypad LED Indicators

Table 7.1 Measurement State LED Indicators

Measurement State Red LED 7 Green LED 9

Stopped Blinking *---*--- Off

Paused Flashing *-*- Flashing -*-*

Running Off Winking **--**--

At this point you are ready to begin a measurement. Navigate to Overall on the SoundAdvisor and press RUN 9.

When performing a measurement, the state of the SoundAdvisor is indicated in several ways: measurement state icon, Overall display animation, and the red and green illumination of the STOP/STORE and RUN/PAUSE keys.

SoundAdvisor Model 831C Performing the Measurement 7-4

Table 7.1 (Continued)Measurement State LED Indicators

Measurement State Red LED 7 Green LED 9

Waiting for valid

data to begin running

The Measurement Range

Delayed

wink

The measurement ranges over which the SoundAdvisor meets the standards depends upon the selected frequency weighting. Measurements which include levels outside this range should not be considered accurate. An overload indication will appear when levels are above the range. However, it isn’t recommended to rely on measurements where the levels are below the lower limit of the specified range.

----* Off

Overload

As part of the calibration procedure, the overload level (dB Peak) and the under range sound pressure levels for A, C and Z weighting are determined for the instrument setup and microphone/preamplifier combination being used. When a signal from the preamplifier exceeds the calibrated input range of the SoundAdvisor, an overload condition exists. To learn more see “Input Overload Icon” on page 2-10

Under Range

When the signal from the preamplifier drops to the point where the noise level of the instrument and the preamplifier influence the measurement, an under range condition exists. To learn more, see “Under Range Icon” on page 2-10

7.3.1 Pausing the Measurement

TAKE NOTE A measurement

may be paused and resumed multiple times.

Erase Previous 5-10 Seconds of Measurement

At any time the measurement of overall data can be temporarily paused. During a pause, the run clock will not stop and instantaneous data will continue to be displayed on the Live display. After a pause, press the 9 RUN/PAUSE key to resume the measurement. The overall data will not be affected by any acoustic events occurring during the time period that the SoundAdvisor was paused.

The SoundAdvisor has a back-erase feature that allows for a quick erase of the last 5 to 10 seconds of measured data. This feature is used to erase sounds that are recorded, but not wanted in the overall measurement.

Back Erase Disabled

The back erase feature is unavailable when any of the following have been enabled in the Active setup:

TAKE NOTE Pressing any other

key besides the back-erase option will end the back-erase state.

• Measurement History

• Event History

• Spectral Ln

SoundAdvisor Model 831C Performing the Measurement 7-5

FIGURE 7-4 Back Erase

The Back Erase feature is located where Menu typically is.

After the first erase, you can erase an additional 5 seconds (not an additional 10).

Undo appears as an option after a ten second erase.

To close Back Erase, start a run again, press the Stop button.

Back erase icon will appear when a part of the measurement was erased during a pause.

The amount of time that was erased will be shown in the information box.

• Event Sound Recording

Back Erase

The back erase is visible when the measurement is paused, and only after the measurement has run more than 5 seconds since the last run or resume.

Session Log

The session log will have an icon to indicate data had been erased.

FIGURE 7-5 Back Erase in the Session Log

SoundAdvisor Model 831C Performing the Measurement 7-6

Time History Records

The time history starts from the time the data was restored. The erased data will be marked as Back Erase as the record type.

FIGURE 7-6 Measurement Data for Back Erase

7.3.2 Resetting a Measurement

CAUTION The measurement

data will be lost if not saved. Additionally, saved data will not be lost during a reset.

CAUTION If a reset happens

while a measurement is running or paused, the SoundAdvisor will automatically stop the measurement for the reset,

A measurement often needs to be reset when a radical noise event takes place that is unnecessarily recorded in your data. For example, an aircraft passing overhead when attempting to measure the background noise in a normally quiet area.

To reset a measurement in progress, stop the measurement then press the 1 (RESET) key. This will erase all data previously measured and reset the run time clock to zero. A reset will not reset stored data files, only the current run. A reset can be initiated when the SoundAdvisor is running, paused, or stopped.

and data will be removed.

7.3.3 Stopping the Measurement

The SoundAdvisor can be stopped during a run or a pause, and will stop the run clock. Resuming a run will continue the overall measurement which has been stopped. The run clock will also begin again from the time indicated when the stop occurred.

7.4 Storing the Measurement

TAKE NOTE A measurement

To store a measurement, follow these steps:

can only be stored when the SoundAdvisor is stopped.

TAKE NOTE You cannot save a

file with the same name as a

Step 1 Press the Stop 7 button to stop the measurement.

Step 2 Press the Store 7 button (unless your preferences are set to

Auto-store, then the first Stop will store or prompt to store).

currently saved data file. If you want the new data file to replace the old data file, you will need to rename or delete the old file first. See “Mea-

Step 3 You will be prompted to save the file. You can change the

name of the data file by highlighting the name and pressing

Enter 5, and an editor will appear. When finished, select

Ye s to save.

surement Data Files” on page 8-1

SoundAdvisor Model 831C Storing the Measurement 7-7

7.5 Low Level Sound Fields



()

Lcorr Log10 10 10

Lmeas Linh()/10()/10

As long as the sound level being measured is within the measurement range shown in “SLM Performance” on page A-2, inherent (selfgenerated) noise and linearity problems can be ignored. It is possible to manually correct the measured RMS sound pressure levels for the typical inherent noise levels (see the noise floor specifications in “SLM Performance” on page A-2) as long as the difference between the measured sound level and the inherent noise level is greater than 3 dB. This is done by subtracting the inherent sound level from the total sound level using the following formula:

where Lcorr = corrected sound level Lmeas = measured sound level Linh = inherent noise level

SoundAdvisor Model 831C Low Level Sound Fields 7-8

Module

8.1 Overview ............................................................................................................... 8-1

8.2 Data Storage Preferences .....................................................................................8-1

8.3 Data File Manager ................................................................................................. 8-2

8.3.1 View Measurement Data File ................................................................... 8-3

8.3.2 Load Settings ........................................................................................... 8-3

8.3.3 Create Average ........................................................................................ 8-4

8.4 USB Drive Storage ................................................................................................ 8-4

8.4.1 Save File to USB Drive ............................................................................ 8-6

8.5 File Naming System .............................................................................................. 8-6

8.6 Out Of Memory ......................................................................................................8-7

8.7 Access Limited ......................................................................................................8-7

8 Measurement Data Files

8.1 Overview

TAKE NOTE A basic measure-

ment records about 42.5 KB.

FIGURE 8-1 Data File Manager

For every measurement saved, a new data file is created on the

SoundAdvisor. The SoundAdvisor saves up to 1.8 GB of data in internal memory. Additionally, an external USB drive can be used to store more data.

8.2 Data Storage Preferences

To indicate where measurement files are stored by default, navigate Tools System PropertiesPreferences.

SoundAdvisor Model 831C Overview 8-1

FIGURE 8-2 Preferences Page

Every stop will store a measurement if Autostore is set. You can be prompted to confirm the store, or it can be automatic.

Your measurement can store on the internal memory, USB drive, or both.

A USB drive is inserted, so the USB icon is displayed.

The current measurement can be running, paused, or stopped while viewing data files.

This is the available storage, unless the USB is connected and set for store-only, then it will be the USB storage space.

The data file name is the name indicated in the setup and used for that measurement.

The top file is saved on the USB drive, and the one below is saved on the meter’s internal memory in this example.

LEARN MORE To save a file on

the USB drive see “Save File to USB Drive” on page 8-6.

8.3 Data File Manager

Data File Manager is a directory of all saved measurement data files.

FIGURE 8-3 Data File Manager

SoundAdvisor Model 831C Data File Manager 8-2

FIGURE 8-4 Data File Manager Menu

Highlight a data file before selecting Menu. The options in the menu will affect the highlighted data file.

You can Rename,

Delete, and Delete All Internal Files.

Refresh List and

navigation commands are on the menu as well.

8.3.1 View Measurement Data File

FIGURE 8-5 Data File Icon

8.3.2 Load Settings

TAKE NOTE Ensure that you

save your current settings before loading. You will lose any settings you had on the Active setup. On how to do this, see “User Defined Setup” on page 6-9.

Navigate Menu Data File Manager Highlight desired data file  Menu View. A read-only display of the Overall and Session Log tabs will show the data from that measurement. To indicate that you are seeing a measurement data file and not the live data, the data file icon will appear next to the data file name.

A saved data file’s settings can be loaded to the Active setup to be used for a measurement.

Stop any measurement currently running or paused before loading the new settings. Navigate to Menu  Data File Manager  Highlight desired data file Menu Load Settings. There is no indication that the settings were loaded, so it is encouraged to review the Active setup after loading. Close the Data File Manager, navigate Menu  Setup Manager then cycle through the Active settings.

SoundAdvisor Model 831C Data File Manager 8-3

8.3.3 Create Average

Create Average takes a saved data file and adds its average as an instance to the unsaved Overall measurement.

• Any unsaved measurement will be overwritten with the new average instance.

• You can add multiple files to the average and each appears as a new instance in the overall measurement. However, each file can only be added once.

• A measurement can run after the averages are loaded, though not recommended for averaging purposes.

• After data files are averaged, you can save the new data as a single file.

Follow these steps to create an average of your data file(s):

Step 1 Navigate to Menu Data File Manager.

Step 2 Highlight desired data file.

8.4 USB Drive Storage

Step 3 Select Menu.

Step 4 Select Create Average.

Step 5 Highlight a different data file.

Step 6 Select Menu.

Step 7 Select Add to Average.

Step 8 Repeat Steps 4-6 until all data files you want to average have

been added.

Step 9 After all the data files are averaged, close the Data File

Manager and navigate to the Overall display to view data.

Step 10 Save the new data file by pressing Store 7.

The SoundAdvisor has a built in USB port where an external memory drive can be inserted, and where measurement data files can be saved. When the USB drive is inserted, the USB Drive Icon will appear next to the battery state icon on the meter.

FIGURE 8-6 USB Drive Icon

SoundAdvisor Model 831C USB Drive Storage 8-4

When USB is inserted, the Data File Manager shows a list of all the data files stored on this USB device. The files saved to the USB device are denoted by the green text USB over the file size. If the “Data Storage Preferences” is set to USB only, this icon will appear:

FIGURE 8-7 USB Only Storage Icon

The Menu has additional items when a USB drive is detected.

FIGURE 8-8 Data File Manager USB Menu

If your settings indicate that the measurements be stored on a USB drive and no USB drive is inserted, this icon will appear. Files will save to the meter until you insert a USB drive. If the USB drive is removed during a measurement, the icon below will appear and the measurement will end and data with that measurement will not be visible on the meter. When the USB drive is reinserted you will be notified that there is unsaved data and prompted to save or delete the measurement data. You cannot continue with that same measurement.

FIGURE 8-9 USB Not Inserted Icon

In the scenario where USB is set to primary, but was inserted during a measurement run-- the files will save internally until the next reset. This is indicated by the following icon.

FIGURE 8-10 USB Inserted During Run

SoundAdvisor Model 831C USB Drive Storage 8-5

8.4.1 Save File to USB Drive

Follow these steps to save a data file to a USB drive manually:

Step 1 Insert USB drive to the SoundAdvisor. Wait for the USB

icon to appear on the top left of the screen (about ten seconds).

Step 2 Navigate to Menu Data File Manager.

Step 3 Highlight desired data file.

Step 4 Select Menu.

Step 5 Select desired action:

• Copy File to USB

•The data file will be copied onto the USB drive. The original file will remain saved on the SoundAdvisor.

• Move File to USB

•The original data file will move onto the USB drive, and no longer in internal memory.

Step 6 Check Data File Manager to confirm desired action was

8.5 File Naming System

Measurement data files saved cannot be named the same, so there are two ways that files names are automatically generated on the SoundAdvisor. These naming conventions are a product of the run mode indicated in a setup. See “Control” on page 6-6.

• Copy All Internal to USB

•All data files on the SoundAdvisor will be copied onto USB drive. The original data files will remain saved in internal memory.

• Move All Internal to USB

•All original data files on the SoundAdvisor will be moved onto the USB drive, and no longer be saved in internal memory.

completed.

The following table explains the data naming conventions used on the SoundAdvisor:

SoundAdvisor Model 831C File Naming System 8-6

Table 8.1 Data File Naming Systems

Run Mode File Naming Convention Example Additional Information

Manual Stop “Default Data File”.NNN 831_Data.001 The “Default Data File” can be changed on

the General setup page. Once the numbers

reach 999, the next data file will be .001.

Continuous YYMMDDHex.LD0 1610110A.LD0 In this mode, the name will be a time stamp

with the year, month, and day followed by a

hex number that increments.

8.6 Out Of Memory

In order to ensure that all measured data can be stored, the SoundAdvisor will stop automatically when the amount of available memory drops to 10 MB. If the unsaved data is less than 800 kB, you can save it after the forced stop. Download all data to an external drive or PC, or delete, before performing another measurement.

8.7 Access Limited

The SoundAdvisor can be accessed by several different sources at once, however the Data File Manager can only be access by one user, one source at any given time. If another user is in the Data File Manager and a second attempts to open it, they will be prompted to end the first user’s session to start their own.

SoundAdvisor Model 831C Out Of Memory 8-7

Module 9 System Properties

9.1 Overview ............................................................................................................... 9-1

9.2 Device ...................................................................................................................9-2

9.3 Time ......................................................................................................................9-2

9.4 NTP .......................................................................................................................9-3

9.5 Power ....................................................................................................................9-3

9.6 Preferences ........................................................................................................... 9-6

9.7 Localization ...........................................................................................................9-9

9.8 Displays ............................................................................................................... 9-10

9.9 Options ................................................................................................................9-11

9.10 Network ...............................................................................................................9-11

9.11 Email ...................................................................................................................9-12

9.12 Other ...................................................................................................................9-13

9.13 Set Reference Spectra ........................................................................................ 9-14

9.1 Overview

System Properties are control functions of the SoundAdvisor and not

related to sound measurement or calculations, but rather instrument properties and instrument settings.

SoundAdvisor Model 831C Overview 9-1

9.2 Device

The time will not update if the meter is running or paused. Stop the measurement before setting time, otherwise the time will wait to update until the next Stop.

Set your time zone first then select Save.

If you have NTP time it is not necessary to set this. If you want to manually set time and override any syncing, adjust this and select Set Time.

Close to save all changes.

Enter 30 characters per field of device information that will appear on the

About page under the Tools menu. See “About System” on page 10-1.

FIGURE 9-1 Instrument Identification

9.3 Time

There are several ways that you can update the time on the meter: GPS, NTP servers, PC clock, or manually set the time. This page is designed for the manual set, but is still automatic for daylight savings, just as long as your timezone is set accurately.

FIGURE 9-2 Set Date/Time & Timezone

SoundAdvisor Model 831C Device 9-2

TAKE NOTE

SoundAdvisor with a PC time, use G4 LD Utility under the

Maintenance tab of the Meter Manager. For more information refer to the G4 LD Utility Reference Manual.

To sync the

9.4 NTP

FIGURE 9-3 NTP Servers

The SoundAdvisor communicates with NTP servers to sync the internal clock with the most accurate time. This requires a valid Internet connection either through Ethernet, wireless modem, or WiFi.

FIGURE 9-4 NTP Icon

9.5 Power

9.5.1 Battery Type

When your time has successfully been synced with NTP servers, the NTP icon will appear next to your time. See Figure 9-4 NTP Icon.

If the time is synced with NTP and Internet connection is then loss, the SoundAdvisor will attempt to reconnect the servers for up to 2 1/2 hours. During this time the icon will remain. If the servers cannot be reached after that time, the icon will disappear.

The SoundAdvisor can be powered by Nickel-Metal Hydride, Alkaline, or Lithium AA batteries. It should always be defined on this System Properties Power page to prevent damage to meter. This information is also used for the calculation of the battery life.

SoundAdvisor Model 831C NTP 9-3

FIGURE 9-5 Battery Type

LEARN MORE To learn more,

see “Battery Power” on page 3-4.

9.5.2 Charge

9.5.3 Auto-Off

CAUTION Do not mix Alkaline and NiMH batteries.

CAUTION Do not mix batteries from different manufacturers

CAUTION Replace all four batteries when installing fresh cells

CAUTION The correct battery type must be specified, based on the battery

type installed. Serious damage, injury, or fire can occur when the battery type is set to NiMH but Alkaline or Lithium batteries are installed because the internal charger will be enabled.

The SoundAdvisor can charge Nickel Metal Hydride batteries that are installed properly. Charge is an On and Off feature that is only available when you have Nickel-Metal Hydride batteries.

Auto-Off time is the duration of time the instrument will stay on when there is no activity. Any of these actions will keep the meter on and reset the Auto-Off time:

FIGURE 9-6 Auto-Off

9.5.4 Analog Power-Save

FIGURE 9-7 Power Save Icon

• Button presses

• Running a measurement

• USB communications

Pressing the 0 (ON / OFF) key will return the instrument and the display to the state it was in when the Auto-Off time expired.

SoundAdvisor Model 831C Power 9-4

FIGURE 9-8 Analog Power-Save

In the power save mode, battery power will significantly reduce by shutting down the analog circuitry and the signal processing activities.This feature is designed to shut down all data collecting processing to save on battery.

The analog power-save time is the duration of time the instrument will stay fully powered after a measurement has stopped. The analog circuitry, including power to the preamplifier will shut down when the instrument has been stopped for the time set. Starting a measurement or performing a reset will restore power to the analog circuitry and the instrument can run the measurement after a ten second delay.

Performing a calibration will also restart the analog power-save time.

9.5.5 Backlights On

FIGURE 9-9 Backlights On

9.5.6 Keypad Backlight

LCD Brightness

Backlights-On is the duration the SoundAdvisor display will be back lit after the last key press. Selecting Always on will increase power consumption.

By toggling keypad backlights to Off, the blue LED under all the keys will turn off. The Red LED on STOP/STORE, and the green LEDs under the RUN/PAUSE and ON/OFF will remain on.

TAKE NOTE Using the

backlight on bright setting will significantly increase power consumption and decrease battery life.

SoundAdvisor Model 831C Power 9-5

You can set the intensity of the backlight of the LCD screen to 100%, 80%, 60%, 40%, or 20%.

In the event that the battery life is below 10%, the SoundAdvisor will override the user setting and downgrade to 50% LCD Brightness, unless the user setting is below 50% brightness, then it will remain the same.

FIGURE 9-10 LCD Brightness

9.5.7 External Shutoff Voltage

To avoid damaging the internal batteries when the voltage of an external battery drops too low, you can set an external shutoff voltage. The SoundAdvisor will shut off automatically when the external voltage drops below this level.

The default level is 10.8 volts, but you can enter a value in the range 10 to 25 volts if your battery usage is other than standard.

9.6 Preferences

9.6.1 Microphone Correction

When using a free-field microphone, a correction can be applied to provide a random incidence response or, when using a random incidence microphone, a correction can be applied to provide a free-field response.

FIGURE 9-11 Mic Correction

9.6.2 Auto-Store

The Auto-store feature applies to all measurements taken on the device.

None

All storage must be done manually, unless in the continuous daily autostore mode indicated in a setup.

TAKE NOTE When a store

occurs, whether prompt or auto, the measurement is reset at the time of the store.

SoundAdvisor Model 831C Preferences 9-6

Prompt

When the 7 Stop button is pressed, or a stop occurs, you will be prompted to save the measurement data file.

Store

A measurement is automatically stored when a measurement is stopped.

Table 9.1 Run Mode Behavior for Auto-store

Run Mode Type of Stop Auto-Store Preference

Prompt Store

Timed Stop

Stop When Stable

Single Block Timer

Daily Timer

9.6.3 AC Output

LEARN MORE Refer to “Soun-

dAdvisor Model 831C Instrument Platform” on page A-1.

Timer-activated final

stop

Manually activated No action performed No action performed

Timer-activated stop Prompts when stable File automatically stored

Manually activated Prompts when stopped File automatically stored

Timer-activated stop Prompts when timer

Manually activated Prompts when stopped File automatically stored

Timer-activated stop No prompt; File automat-

Manually activated No action performed No action performed

Prompts when timer is

complete

completes

ically stored

File automatically stored

The AC output is a full dynamic range AC/DC output. It does not drive a headset or headphones.

If the signal is set to Off, then the AC/DC output is not powered.

FIGURE 9-12 SoundAdvisor AC/DC Output Jack

SoundAdvisor Model 831C Preferences 9-7

9.6.4 Reset Prompting

9.6.5 Data Storage

If a measurement is made that is unwanted, you can press the 1 Reset button to clear the unsaved data. By checking the Reset Prompt box, the meter will give you a dialogue box to confirm a reset before clearing the data.

This feature indicates where your data file will store:

TAKE NOTE If a USB drive is

not inserted, data files will save onto the SoundAdvisor memory, regardless of indicated preference.

9.6.6 GPS Mode

9.6.7 Color Theme

Internal

Data files saved manually and through auto-store will save onto the SoundAdvisor 2 GB memory (1.8 GB usable).

USB

Data files saved manually and through auto-store will save onto the inserted USB drive.

USB Backup

Data files will save on both the SoundAdvisor internal memory and inserted USB drive.

GPS mode will need to be On if a GPS device is inserted in the Aux drive, and you wish to use it.

The SoundAdvisor LCD screen has six options for color themes: three light and three dark. The light screens are encouraged to be used when sunlight or outdoor settings are mostly present when operating the meter, and the dark themes are better for indoor or low light use.

SoundAdvisor Model 831C Preferences 9-8

FIGURE 9-13 Color Themes

9.7 Localization

Language

The SoundAdvisor has a built in language translation feature, where you can set your language preference. The following languages are available:

• English

•Cestina

• Français

• Deutsch

•Italiano

•Norsk

• Português (PT)

• Português (BR)

•Español

• Svenska

• Türkçe

SoundAdvisor Model 831C Localization 9-9

FIGURE 9-14 Language Selection

Decimal Symbol

Depending on your preference, the decimal symbol on the units of measurement can be a period or a comma. Select the radio button of the desired symbol, and save to make changes.

Date Format

The SoundAdvisor has two date formats day-month-year and year-monthday. Both options are in two number digit displays. For example: 201702-14. Select the radio button of the desired format, and save to make changes.

9.8 Displays

Units

The default units for the SoundAdvisor is SI (International System of Units), however you can change this to English units. Select the radio button of the desired unit, and save to make changes.

When you power your meter on, the first display page defaults to the profile page of the Live display. This can be changed on the Displays page.

Start

Start refers to the display that is shown first when you boot up the SoundAdvisor. You can choose any of the main displays available to you. Select your option from the drop down box, save, and close. The next time your meter powers on, you will see your start display.

Tabs & Pag es

Each Tab chosen will show a new list in the Pages section. You can check or uncheck pages depending on what you want shown on the meter. This feature will hide unwanted page displays, not delete them.

SoundAdvisor Model 831C Displays 9-10

FIGURE 9-15 Display Options

9.9 Options

TAKE NOTE Default options

will not appear in the list as they cannot be disabled.

FIGURE 9-16 Options Enable/Disable

You can enable or disable options installed on the SoundAdvisor. Disabling an option does not delete the option, and it can be enabled at anytime. A reboot is required after any changes are made.

9.10 Network

See “Communications & WiFi” on page 13-1.

SoundAdvisor Model 831C Options 9-11

Larson Davis SoundAdvisor 831C, 831C Reference Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 SoundAdvisor Features

1.1 Overview

1.2 Basic Operations

1.3 Applications

1.4 Hardware Features

1.5 Performance Features

1.6 Available Options

1.6.1 Purchase-Required Options

1.7 Accessories

1.7.1 Optional Accessories

Module 2 Instrument Overview

2.1 Overview

2.2 Instrument

2.3 Keypad

2.3.1 Navigating and Selecting

2.3.2 Basic Run Function

2.3.3 Entering Text

2.4 Microphones and Preamplifiers

2.5 Displays and Icons

2.5.1 Measurement Data Tabs

2.5.2 Pages

2.5.3 Status Bar Icons

2.5.4 Display Menus

Module 3 Getting Started

3.1 Unpacking & Inspecting

3.1.1 Serial Numbers

3.2 Connecting the Microphone & Preamplifier

3.3 Connecting the Preamplifier to SoundAdvisor

3.4 Disconnecting the Preamplifier

3.5 Powering the SoundAdvisor

3.5.1 Battery Power

3.5.2 External Power

3.6 Turn the SoundAdvisor ON

3.6.1 Turn the SoundAdvisor OFF

3.6.2 Power Display Pages

3.7 Long Term Storage of SoundAdvisor

Module 4 Data Display

4.1 Overview

4.2 Data Labels

4.3 Live Displays

4.3.1 SLM Page

4.3.2 Big Digit Sound Level

4.3.3 Octave Band Analyzer

4.3.4 Normalized Octave Band

4.3.5 Triggering

4.3.6 Preamplifier Interface Page

4.4 Overall Displays

4.4.1 SLM Display

4.4.2 Big Digit

4.4.4 Octave Band Analyzer

4.4.5 Normalized Octave Band

4.4.6 Ln Percentiles

4.4.7 1/3 Spectral Ln

4.4.8 Exceedances

4.4.9 Overloads

4.4.10 Community Noise

4.4.11 C Minus A Impulsivity Page

4.4.12 TA-Lärm

4.4.13 Sound Exposure Level Page

4.4.14 Metrics Matrix Page

4.4.15 Power Page

4.5 Session Log Tab

4.6 Adjust Graph Scale

Module 5 Calibration

5.1 Calibration Overview

5.2 Calibration Displays

5.2.1 Calibrate Page

5.2.2 Calibration Settings

5.2.3 Calibration History

5.2.4 Calibration Certification

5.3 Choosing a Calibrator

5.4 Performing a Calibration

Module 6 Measurement Setup

6.1 Overview

6.2 Setup Manager

6.2.1 General