B&K 2245 User Manual

Download

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Enviro Noise Partner

with B&K 2245

User Guide

for Version 1.0

BN 2375–11

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TABLE OF CONTENTS 3

INTRODUCTION 7

Overview 7 Licences 8 About 8

About the Instrument 8

About the Mobile App 9

About the PC App 10

System Requirements 10 Data Storage 11 Service and Support 11

Contact Information 11

Additional Documentation 12

GET STARTED 13

Hardware Interface 13 Instrument GUI 15

How to Display the GUI in a Web Browser 20

Install the Apps 21

Download the Mobile App 21

Download the PC App 21

Local Connections 22

Join your Local Network 22

Use the Instrument as a Hotspot 23

Remote Connections 23

How to Connect Remotely via an IPv4 Address 24

How to Connect Remotely via an IPv6 Address 25

Connect the Mobile App to the Instrument 26

How to Add the Instrument Manually 27

How to Disconnect Devices 27

Troubleshooting Connection Problems 28

Mobile App GUI 28 Charge the Battery 35

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Table of Contents:

Status 36

Power Consumption 36

SET UP THE INSTRUMENT 37

Regional Settings 37

How to Change Regional Settings 37

About the Settings 37

Input Settings 38

How to Set up the Input 38

About the Microphone 38

About Sound Fields 39

Measurement Control 39

How to Set up Measurement Controls 39

About Logging Mode 39

About Measurement Time 40

About Back-erase Mode 41

Measurement Parameters 41

How to Set up Broadband Parameters 41

Spectrum Parameters 47

Statistical Parameters 50

Audio Recording 51

How To Record Audio 51

Display Settings 51

How to Change Display Settings 52

About Screen Settings 52

About Light Ring Brightness 52

About Measurement Display Settings 52

About Data View 53

Voltage Output 54 Lock the Settings 54

CHECK THE CALIBRATION 55

How to Perform a Calibration Check 55 Calibration History 57 Calibration Settings 57

Automatic Calibration Check 57

Calibration Reminder 57

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Table of Contents:

Custom Calibration 57

CREATE A PROJECT 58

How to Delete a Project 58 Add Past Measurements 58 Set up Markers 60

MEASUREMENTS 63

Make a Measurement 63

Data explorer 64

Data Management 64

Use the App to Make a Measurement 65 Place Markers 65

How to Add a Marker 66

How to Remove a Marker 66

ANNOTATIONS 67

How to Make Annotations 67 How to Attach Unattached Annotations Using the Mobile App 68

TRANSFER DATA 69

How to Import Data to the PC App 69 How to Add an Instrument using Its IP Address 71 How to Store a Backup 71

Network Storage 71

USB Stick 72

USE THE PC APP 73

PC App GUI 73 Import a Project 78

How to Import a Project 78

Import from a Backup 80

Add an Instrument Using its IPAddress 80

Create a Project 81 Import Measurements 81

How to Import Measurements 82

Import from a Backup 83

Add an Instrument Using its IPAddress 84

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Table of Contents:

Examine the Project 84

The Measurement Window 84

The Spectrum Window 87

The Graph View 88

The Table View 88

Review Annotations 88

Work with Markers 89

Export a Project 91

How to Export a Project 91

About Master Files 92

TERMINOLOGY 94

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INTRODUCTION

Overview

Your instrument works with applications:

Introduction: Overview

l Noise Partner is the default, general-purpose application for measuring sound levels l Enviro Noise Partner is for measuring and analysing sound levels in the world around us l Work Noise Partner is for determining sound exposure levels in the workplace

There is a mobile version and a PC version of each app.

The mobile app connects with the instrument to act as a remote control and help guide you through set up. It also enables you to document the measurement with photos, video, notes and commentaries using the functionality of your mobile device. Once you have made a measurement, you will use the PC app to view and process data, and report your findings.

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Introduction: Licences

Licences

B&K 2245 is a type-approved sound level meter (SLM). However, this basic functionality can be extended with optional licences; it can perform frequency analysis, log broadband and spectral data, perform statistical analysis and make audio recordings.

Licences for the instrument control the functionality of the instrument and to which applications it can connect.

BZ-7300: Noise Partner

Measure broadband parameters

l Connect to Noise Partner mobile and PC apps

BZ-7301: Enviro Noise Partner

l Measure broadband parameters l Perform spectrum analysis (1/1- and 1/3-octave) l Statistical analysis of measured broadband parameters l Logging mode l Record audio l Connect to Enviro Noise Partner mobile and PC apps

BZ-7302: Work Noise Partner

l Measure broadband parameters l Perform spectrum analysis (1/1- and 1/3-octave) l Logging mode l Record audio l Connect to Work Noise Partner mobile and PC apps

BZ-7304: Exhaust Noise Partner

Measure broadband parameters

l Connect to Noise Partner mobile and PC apps

About

About the Instrument

The instrument measures basic sound level meter parameters (Leq, Lmax, Lmin and Lpeak) with up to two simultaneous frequency weightings (A, B, C, Z) and up to three simultaneous time weightings (F, S, I) for the exponential averaging.

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Introduction: About

The instrument performs frequency analysis of either 1/1- or 1/3-octave spectra (Leq, Lmax, Lmin) with one of the available frequency weightings (A, B, C, Z) and time weightings (F, S).

The instrument takes single measurements. In other words, the instrument calculates a single value for each measured parameter for the total measurement time.

The instrument takes logged measurements. In other words, it has a logging mode that can average and log intervals of broadband and/or spectral data to obtain a profile of the total measurement with logging intervals between 1 s and 1 min.

The instrument performs statistical analysis on either LAeq, LAF or LAS with calculation of 5 user-defined percentile levels.

The instrument takes audio recordings.

Standards

Go to: Menu > About > Standards

Here you will see the complete list of standards to which the instrument conforms.

About the Mobile App

The mobile app interfaces with the instrument, making remote measurements possible and making it easier to change settings and interact with the data. It is recommended that you use the mobile app whenever possible.

Functionality of the mobile version of Enviro Noise Partner:

l Set up the instrument for measuring l Control the instrument remotely l Annotate measurements (add photos, videos, notes and commentary) l Add markers to measurements l Customize markers (name and type) l Track position and time using GPS l See the status of the instrument l View:

l Instantaneous broadband parameters l Total broadband parameters l 1/3- and 1/1-octave spectra l Logging profiles

l Recall past data stored on the instrument

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About the PC App

Functionality of the PC version of Enviro Noise Partner:

l Import projects created with the mobile app from the instrument l Create projects from measurements stored on the instrument l Add measurements stored on the instrument to an existing project l Create custom markers and add them to measurements l View:

l Broadband levels l Logging profiles l Statistical data

l Annotations (photos, videos, notes and commentaries) l Play back recorded audio (digitally gained) l Export projects for sharing or reporting

System Requirements

Introduction: System Requirements

The Mobile App

iPhone®

See supported iOS versions for current app version in the App Store®, under Enviro Noise Partner > Inform-

ation > Compatibility.

The PC App

System Requirements:

l Windows® 7, 8.1 or 10 (64-bit) operating system l Microsoft® .NET 4.7.2 framework

Recommended PC:

l Intel® Core™ i5 or better l Sound card l Solid State Drive (SSD) l 8 GB of memory l At least one available USB port l Microsoft Office 2016 or later

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Introduction: Data Storage

Data Storage

The Instrument

Data storage: Approximately12GB

The instrument has 16GB of built-in storage, of which approximately 12GB is available for data storage. All measurement data and annotations are stored on the instrument.

Measurements and annotations are imported to the PC application from the instrument. They can then be saved to your computer or to a location on a network.

Useful Settings

l Menu > Data explorer:View past measurements or move them to trash l Menu > Status: See remaining storage space l Menu > System settings > Data management: Settings for data backup and retention

Mobile App

Neither measurement data nor annotations are stored on your mobile device, everything is uploaded to and stored on the instrument.

Service and Support

The instrument comes with the standard product warranty for Brüel & Kjær products.

Visit www.bksv.com/Service to request a quote for or find information about services.

Hardware maintenance and repair

l Calibration l Extended warranty contracts for hardware

Firmware updates: Return the instrument to a certified service centre to update the firmware.

✐ Note: When you return your instrument for service, the firmware will be updated to the latest version.

Application updates:Updates are handled via the application.

Contact Information

For service and support, contact your nearest Brüel & Kjær Customer Care support team.

Headquarters: info@bksv.com, +45 7741 2000

China (Beijing): +86 10 59935811

France: service.fr@bksv.com, +33 1 69 90 71 02

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Germany: bkservice.de@bksv.com, +49 421 17 87 0

Italy: it.info@bksv.com, +39 02 5768061

Japan: info_jp@bksv.com, +81 3 6810 3500

North & South America: bkservice@bksv.com, +1 770 209 6907

Spain: servicio.tecnico@bksv.com, +34 91 659 08 20

UK & Ireland: ukservice@bksv.com, +44 1223 389800

Go to www.bksv.com/contact for contact information to our other global offices.

Additional Documentation

Product Data

l B&K 2245 with Noise Partner: BP 0029 l B&K 2245 with Enviro Noise Partner: BP 0030 l B&K 2245 with Work Noise Partner: BP 0031 l B&K 2245 with Exhaust Noise Partner: BP 0032 l Microphone Type 4966: BP 2536

Introduction: Additional Documentation

Resources

l Environmental Noise: BR1626 l Measuring Sound Primer:BR0047

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GET STARTED

Hardware Interface

The microphone is at the top of the instrument.

Get Started: Hardware Interface

is the power/menu/reset button.

Press and hold the button to power the instrument on or off. When the instrument is on, press the button briefly to open the menu. If the instrument becomes unresponsive, press and hold the button for approximately 30 seconds (remove cables first).

The arrow buttons scroll through measurement displays, auto-zoom graphs, move cursors and nav- igate the menu.

Press and briefly to scroll through measurement displays.

Press and briefly to scroll through the parameters for each display.

Press and hold or to move the cursor on the Spectrum and Profile displays.

Press and hold to auto-zoom the Y-axis on the Spectrum and Profile displays.

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Get Started: Hardware Interface

is the stop/reset button.

Press the button once to stop a measurement. At this point, averaged measurement parameters will stop updating and you can review the results. Press the button again to clear the results and reset the instrument for the next measurement. Data is saved automatically.

is the start/pause button.

Press the button once to start a measurement, press it again to pause the measurement, press it a third time to resume the measurement.

The screen displays sound levels and the menu.

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Get Started: Instrument GUI

The light ring is colour-coded to reflect the status of the instrument.

The light ring is solid green while measuring.

The light ring flashes yellow slowly while idle or quickly while paused (measuring).

The light ring flashes red quickly for intermittent overloads.

The light ring is solid purple for latched overloads.

The light ring flashes white slowly when switched off and charging the battery.

The light ring flashes blue while pairing a mobile device with the instrument.

On the base of the instrument is a threaded hole for mounting the instrument on a tripod and a USB-C socket. Use the USB socket as a connector or as signal output.

Instrument GUI

This is an example of the instrument graphical user interface (GUI) in dark colour scheme while measuring and connected to the mobile app.

Hint: You can view the GUI in a web browser via the instrument's IP address.

Instructions are at the end of this section.

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Get Started: Instrument GUI

The top region shows measurement information and instrument status.

When idle, the instrument displays the current time (to the left) and input settings (to the right).

: Indicates that Sound field is set to Free-field and there is no windscreen

: Indicates that Sound field is set to Free-field and there is a windscreen

: Indicates that Sound field is set to Diffuse-field and there is no windscreen

During a measurement, the instrument displays the start time (to the left) and the elapsed time (to the right).

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measurement.

Get Started: Instrument GUI

The number in the centre is the measurement number. The first measurement of every day is number 1. The number increments with each new measurement.

The background colour of the top region and the centre symbol change to indicate the state of the instrument.

: Indicates that the instrument is ready to measure.

: Indicates that the instrument is measuring.

: Indicates that the instrument is paused.

: Indicates that the instrument is stopped and displaying results from the

In the middle is the measurement display. There are views for broadband parameters (SLM view and List view), spectrum parameters (Spectrum view, logging profiles (Profile view and a view for information about your data (About data view).

Press and briefly to scroll through measurement displays. Press and

briefly to scroll through the parameters for each display.

SLM view (left) and List view (right) are the main displays for single measurements. SLM view shows a bar graph and one broadband parameter. List view shows a bar graph and a list of broadband parameters.

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Get Started: Instrument GUI

The bar graph shows the instantaneous sound level (L) with frequency and time weightings. This display is sometimes called the fast bar or fast display.

: Indicates the maximum instantaneous sound level during a measurement.

✐ Note: The bar graphs in SLM view and List view are unique, that is they can each be set to show a different para- meter.

l Go to Menu > Display settings > SLM view > Graph parameter to set the parameter for the bar graph when dis-

playing one broadband parameter

l Go to Menu > Display settings > SLM view > Graph parameter to set the parameter for the bar graph when dis-

playing a list of broadband parameters

Profile view is the main display for logged measurements because it shows the profile of logged broadband and/or spectrum parameters.

Press and hold or to move the cursor in the display. The readout above the

graph shows the location of the cursor and its decibel level. Press and hold to

auto-scale the Y-axis to fit the data.

Spectrum view displays the frequency analysis of spectrum parameters, shown as decibel (dB) levels by Hertz (Hz).

Press and hold or to move the cursor in the display. The readout above the

graph shows the location of the cursor and its decibel level. Press and hold to

auto-scale the Y-axis to fit the data.

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Get Started: Instrument GUI

For very low or very high sound levels, you will see indicators.

: Indicates a signal that is under the measurement range.

Overload occurs when the signal is over the measurement range. There are two types of overload indicators: latched and instantaneous. The latched-overload indicator is triggered at the first instance of overload and persists until the instrument is reset. The instantaneous-overload indicator is triggered every time the signal is over the measurement range.

: Indicates instantaneous overload.

: Indicates latched overload.

The bottom region provides information about the system: battery, network, and connectivity status.

The battery icons show the status of the battery. For example, (charging) or

(full).

The network icons show the current network settings and its status. For example,

connection) or (aeroplane mode).

The connectivity icons show you to which app the instrument is connected:

(mobile) or (PC).

indicates that a backup is in progress.

(connected to a wireless network), (acting as a hotspot), (Ethernet

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The Menu

Use the buttons on the instrument to interact with the menu.

: open / close the menu;open a response dialog;confirm a setting in a

response dialog;enable/disable parameter selection boxes

: navigate up a list; increment a value in a response dialog

: navigate down a list; decrement a value in a response dialog

:navigate down a level in the menu; exit a response dialog (without confirming

a setting)

: navigate up a level in the menu;enter a response dialog

Hint:

l The menu is hierarchical. Your current location in the menu is shown in the header l The menu opens at the location from which it was closed

An arrow (>) on the far right indicates that there is a sub-menu, press to access it

Navigate to the and press to exit parameter menus

Get Started: Instrument GUI

How to Display the GUI in a Web Browser

You will need:

l Your instrument l A computer or mobile device with Wi-Fi® and a web browser installed

Procedure:

1. Go to: System settings > Network settings > Web server display.

2. Select Enabled.

Network your devices. One way to do this is:

a. On the instrument, go to: System settings > Network settings > Wi-Fi settings > Wi-Fi mode.

b. Select Act as hotspot.

c. Make note of the hotspot name (example: BK2245-000000) and password.

d. Connect your device to the hotspot as per the manufacturer's instructions.

4. On your mobile device or computer, open a web browser.

Type <IP address/display> in the address bar of the browser. When acting as a hotspot, the IP address of the instrument is 10.42.0.1, so you will type <10.42.0.1/display>.

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✐ Note: You can find the instrument's IP address here:System settings > Network settings. Look under Wi-Fi settings or Ethernet settings depending on your connection.

Install the Apps

Download the Mobile App

You will need:

iPhone®

See supported iOS versions for current app version in the App Store®, under Enviro Noise Partner > Inform- ation > Compatibility.

Procedure:

1. Go to the App Store®.

2. Search for and install Enviro Noise Partner.

Get Started: Install the Apps

Updates

You will be informed of updates via the App Store.

Download the PC App

You will need:

l A computer with access to the Internet and a web browser

System Requirements:

l Windows® 7, 8.1 or 10 (64-bit) operating system l Microsoft® .NET 4.7.2 framework

Recommended PC:

l Intel® Core™ i5 or better l Sound card l Solid State Drive (SSD) l 8 GB of memory l At least one available USB port l Microsoft Office 2016 or later

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Procedure:

1. Go to: https://www.bksv.com/en/Service/downloads.

2. From the list of available downloads, expand B&K 2245 Downloads.

3. Click B&K 2245 Software downloads.

4. Click the link to install the Enviro Noise Partner desktop app on your PC.

Once the download is complete, double-click Setup.exe to start installation.

✐ Note: The file will be placed in a location that is defined by the settings in your web browser.

The PC application will start immediately after installation.

Updates

You will be informed of updates via the application.

Local Connections

Get Started: Local Connections

A local connection is a connection to a local area network (LAN). It is the simplest way to connect the apps to the instrument. Typically, the network will be your office or home network, but you can also use the instrument to create a hotspot to which you can connect devices while you are out in the field.

Once the instrumentand the device running the app are using the same network, they can communicate. You will use Wi-Fi®, Bluetooth® and Ethernet in varying combinations to enable communication between devices.

✐ Note: The mobile app and PC app do not connect to one another, the apps only connect to the instrument.

Join your Local Network

Connect all devices (instrument, mobile device and PC) to your local network so that they can communicate with one another. Connect the mobile device and PC as per the manufacturer's instructions. Connect the instrument using one of the following options:

l Use an Ethernet connection:

l Connect the instrument to your PC using a USB-C to USB-A cable

l Connect an Ethernet cable to the Instrument using a USB-C to Ethernet adaptor

l Place the instrument on the desktop base station (an optional accessory that provides power and a net-

work connection to the instrument)

l Use a wireless connection:

Press briefly to open the menu.

b. Go to: System settings > Network settings > Wi-Fi settings > Wi-Fi mode.

c. Select Connect to network.

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Get Started: Remote Connections

d. Go to: Wi-Fi name.

e. Select the network you wish to join.

f. Enter the password at the prompt.

Use and to scroll through the character menu.

Use and to move left or right.

Press to advance to the options:OK or Cancel.

Use the Instrument as a Hotspot

Connect your mobile device and / or PC to the instrument's hotspot so that the devices can communicate.

1. On the instrument, go to: System settings > Network settings > Wi-Fi settings > Wi-Fi mode.

2. Select Act as hotspot.

3. Make note of the hotspot name (example: BK2245-000000) and password.

4. Connect the mobile device and / or PC to the hotspot as per the manufacturer's instructions.

Change the Hotspot Password

If you wish to change the default password for the instrument hotspot:

1. Go to: System settings > Network settings > Wi-Fi settings.

2. Ensure that Wi-Fi mode is set to Act as hotspot.

3. Select Password.

Use and to scroll through the character menu.

Press to confirm the changes.

✐ Note: Restart the instrument to apply the new password.

Remote Connections

It is possible to connect to an instrument remotely, that is, connect to an instrument on a network from a different network or the Internet. Establishing a remote connection is a little more complicated than creating a local connection, but it can be helpful if you want to be able to access your instrument from remote locations. The following includes information about your instrument, general guidelines for the configuration of your router to enable remote connection, and how to test the connection.

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Get Started: Remote Connections

✐ Note:

l Remote connection is optional. In other words, you do not need to be able to connect to your instrument

remotely in order to use it with the mobile and PC apps.

l Please refer to the manufacturer of your router or to your Internet service provider (ISP) for information spe-

cific to your network.

l The instrument must be on and connected to the network in order to access it remotely using the mobile or PC

app.

Before you begin, you will need some information about your Internet service:

Is your IPaddress IPv4 or IPv6 or both?

The instrument supports both. The difference is that IPv4 requires port forwarding while IPv6 does not.

If you have an IPv4 address, is it static or dynamic?

You can use either static or dynamic addresses. However, dynamic IPv4 addresses change, which requires you to enter a new IP address in the mobile or PC app every time the address changes.

If you have a dynamic IPv4 address, can you get a static IPaddress or set up a DynDNS (dynamic domain name system)?

You can use a static IP address or set up DynDNS, which works by assigning a persistent host name to the instrument, to overcome the problem of changing IPv4 addresses.

Is your ISPblocking any instrument ports?

✐ Note: The instrument uses ports 80, 443 and 8700 to 8720. It is not possible to change these ports. There- fore, remote connection is not possible if your ISPblocks any of those ports.

What you will need:

l An instrument that is connected to the network (either by Wi-Fi® or Ethernet) l Access to the settings interface of your network router

How to Connect Remotely via an IPv4 Address

Use the NAT (network address translation) capabilities of your router to forward the ports of your instrument so that you can connect to it remotely.

A general procedure is as follows:

✐ Note: This procedure applies to static IPv4 addresses and dynamic IPv4 address using DynDNS.

Look for the port forwarding option on your router.

If you do not find it right away, look for advanced options.

Create port-forwarding rules.

Port-forwarding rules link the IPaddress of the instrument to ports that it uses so that when you send a request to the instrument's network from another network, the router knows to which device to direct the request.

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Get Started: Remote Connections

You can find the IPv4 address of the instrument on the instrument or on the router.

l On the instrument, go to: Menu > Network settings > Wi-Fi settings or Ethernet settings > IP

address

l On the router, there should be a list of the connected devices

The instrument uses the following ports:

l Port 80, the common port assigned to HTTP (hypertext transfer protocol) l Port 443, the common port assigned to HTTPS (hypertext transfer protocol secure) l Ports 8700 to 8720, open ports that the instrument uses

✐ Note: All ports use TCP (transmission control protocol).

From another network, such as a mobile network, test the setup.

✐ Note: Turn off Wi-Fi on your mobile device to make sure that you are not connected to the same network as the instrument.

a. Open the mobile app.

From the instrument list, tap Add instrument manually.

✐ Note: If the mobile app is connected to an Instrument, disconnect from it to access the list.

Enter the IP address or host name.

For IPv4 addresses, this will be your network's public WANIP address

You can find your WAN IPaddress on your router or through an Internet search of 'my IP'.

l For DynDNS, this will be the host name given by the DynDNS

d. Tap Done. e. Tap the instrument listing to connect.

✐ Note: You can also test the setup using the PC app. Click to open the import dialog then click and

select Add instrument from IP.

How to Connect Remotely via an IPv6 Address

You do not have to set up port forwarding when using an IPv6 address.

To test the remote connection, try to connect to the instrument from a different network. The easiest way to check is to use a mobile device that has a mobile network and the mobile app installed.

✐ Note: Turn off Wi-Fi on your mobile device to make sure that you are not connected to the same network as the instrument.

1. Open the mobile app.

From the instrument list, tap Add instrument manually.

✐ Note: If the mobile app is connected to an Instrument, disconnect from it to access the list.

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Get Started: Connect the Mobile App to the Instrument

Enter the IPv6 address of your instrument.

To find the IPv6 address, go to: Menu > Network settings > Wi-Fi settings or Ethernet settings > IPv6 address

✐ Note: Enter the address in brackets, for example: [2701:db8:424d:d15::1a2f::].

4. Tap Done.

5. Tap the instrument listing to connect.

✐ Note:

l If you are unable to connect, try adjusting the firewall settings on your router.

You can also test the setup using the PC app. Click to open the import dialog then click and select Add

instrument from IP.

Connect the Mobile App to the Instrument

The mobile app connects to the instrument via Wi-Fi® and Bluetooth®.

What you will need:

l The instrument l An iPhone or iPod with the mobile app installed

Connect the Mobile App to the Instrument

Connect the mobile device and the instrument to the same local network.

You have two options:

l Connect the instrument and the mobile device to your current network

l Set the instrument to act as a hotspot then connect the mobile device to the hotspot

2. Enable Bluetooth on your mobile device as per the manufacturer's instructions.

Open the mobile app.

Before the mobile app connects to an instrument, it will open to a list of the instruments it detects sorted by nickname, type and serial number.

Tap on your instrument to connect.

Hint: Give the instrument a nickname (System settings > Network settings > Nickname). A nickname can

make it easier to find your instrument in a list. Also, nicknames are fun!

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Get Started: Connect the Mobile App to the Instrument

That's it! The instrument shows when it is connected to the mobile app.

Once the mobile app has connected to an instrument, the app will remember the instrument and re-establish a connection automatically after separation.

✐ Note: Remember that measurement data is stored on the instrument. If measurement data is no longer being dis- played after separation, tap on the mobile app to open the list of past measurements and recall the desired meas-

urement.

How to Add the Instrument Manually

If you want to find an instrument that is not showing up in the list of discovered instruments, such as an instrument on another network, you can manually add the instrument to the list using its IPaddress.

✐ Note: Use this functionality to connect to your instrument remotely.

On the mobile app, tap Add instrument manually.

Enter the IP address or host name.

l For local connections, you can find the IPaddress of the instrument here:Menu > System settings > Net-

work settings > Wi-Fi settings or Ethernet settings

l For remote connections, the IP address or host name will depend on your setup. Refer to Remote Con-

nections for information about which IPaddress or host name to use

3. Tap Done.

How to Disconnect Devices

Disconnect the instrument from the mobile app if you wish to connect the mobile app to another instrument. When you disconnect the instrument, the mobile app will not connect to the instrument automatically.

In the mobile app, tap to open the instrument menu.

Tap the instrument.

3. Tap Disconnect.

✐ Note: If you disconnect the instrument from the mobile app, the app will still discover the instrument.

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Get Started: Mobile App GUI

Troubleshooting Connection Problems

l Check that the instrument is set to act as a hotspot (System settings > Network settings > Wi-Fi settings > Wi-Fi

mode)

Check that the instrument is generating a hotspot, it will show

l Check that Wi-Fi is enabled on the mobile device l Make sure that the two devices are within range l Try turning Wi-Fi off and on again on the mobile device l Try re-entering the network password on the mobile device. You may have to forget the network first

If you get an invalid password error message on the mobile device when trying to connect to the instrument hotspot, try rebooting the instrument

Mobile App GUI

Once the mobile app and instrument are connected, the Enviro Noise Partner mobile app opens to the project list. Projects are organized by date and time.

Tap an existing project to open it. Swipe left to delete a project. Tap Create new pro- ject to start a project.

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Get Started: Mobile App GUI

The project screen has two parts:Measurements and Setup. Use the tabs on the bottom to navigate between

the two.

Setup is for setting up markers. Tap Markers to edit the name of and assign a function to each of the markers.

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Get Started: Mobile App GUI

Measurements is for adding measurements to the project. Tap Import to add measurements that are stored on the instrument or tap Measure to open the measurement screen and make new measurements.

Tap to close the measurement screen and return to the project screen.

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Get Started: Mobile App GUI

The mobile app displays the same colour, status icon and measurement number as the instrument.

Tap to access the instrument menu.

The icon also indicates status. means there is no connection between the instru-

ment and the mobile app. means that the wireless signal is weak. means data is being uploaded to the instru-

ment.

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Get Started: Mobile App GUI

Tap to access information about the mobile app and help.

Use the navigation bar to change between Total (left), Profile (centre) and Annotations (right).

meters. Each view contains a unique bar graph.

Total displays instantaneous parameters, parameters that are calculated for the total measurement time, and frequency analysis parameters. It is the main display for single measurements. SLM view (left) shows an instantaneous broadband parameter (bar graph) and one calculated broadband parameter. List view (centre) shows an instantaneous broadband parameter (bar graph) and a list of calculated broadband parameters. Spectrum view (right) shows an instantaneous broadband parameter (bar graph), and the frequency analysis of two spectrum para-

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Get Started: Mobile App GUI

Swipe left or right to switch between views. Tap on a parameter to change the parameter being displayed. Tap and drag

to move items in the list.

Profile displays the logged broadband and/or spectrum parameters (Profile view). It is the main display for logged measurements.

Swipe left or right to switch between views of a single logged broadband parameter, multiple logged broadband parameters or a single logged spectrum parameter. Tap on a parameter to change the displayed parameter.

You can interact with the profile graphs: scroll forwards and backwards through time, double tap on

the Y-axis to scale the graph to the data, and tap on unwanted markers to remove them. For the spectrum parameter, highlight different frequencies in the spectrum graph to view the logging profile graph at each frequency.

Annotations is the list of annotations.

Tap an annotation to review it. Swipe left on an annotation to delete it. While measuring or reviewing a measurement, tap Attach to add an unattached annotation to the measurement.

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Get Started: Mobile App GUI

During a measurement, the mobile app shows the measurement start time ( )

and the measurement duration time ( ).

Add markers to your measurements to make a note of events in the measurement. Tap a marker to start applying it, tap it a second time to stop applying it. You can apply one or more markers simultaneously.

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Get Started: Charge the Battery

Tap to reset the instrument for the next measurement.

Tap to open the annotation menu.

Tap to start a measurement.

During a measurement, slide to the right to stop or slide to the left to

pause.

Charge the Battery

The instrument has an internal Lithium-ion rechargeable battery.

Approved Power Sources

l Mains l Base station (the base station is powered via mains) l Computer l Power bank

Procedure

Connect the instrument to a power source.

indicates that the battery is charging with a readout of the percentage charged.

Disconnect the power source to stop charging.

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Get Started: Charge the Battery

Status

Go to Menu > Status to see the status of the battery.

l Status: Either Full, Charging, or Discharging l Time remaining: The approximate time left on the charge l Charged: The percentage to which the battery is currently charged l Max capacity: The percentage of the total amount of energy of the battery when it is of the fully charged

Power Consumption

Settings for the screen and wireless configuration can have a noticeable effect on the instrument's power consumption. The type of measurement you perform will not have a large effect on battery consumption.

To manage power consumption, you can modify these settings:

l System settings > Power management l System settings > Network settings > Wi-Fi settings > Wi-Fi mode l Display settings > Screen brightness

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Set up the Instrument: Regional Settings

SET UP THE INSTRUMENT

Regional Settings

Regional settings allow you to choose the language, date and time settings of the instrument.

How to Change Regional Settings

Open the menu.

From the instrument: Press briefly to open the menu.

From the mobile app: Tap to open the instrument menu.

2. Go to: System settings > Regional settings.

3. Choose the desired language, data and time settings.

About the Settings

Language:Change the language of the user interface of the instrument.

Time zone: Choose the time zone in which you are measuring.

✐ Note: It is very important that the instrument, mobile device and PC are all set to the same time zone. Otherwise, you may not be able to import measurements from the instrument to the PC app.

Date format: Choose the order of day, month, year (in numerical format).

Time format: Display time as a 24- or 12-hour clock.

Date separator: Choose the symbol that separates the day, month and year.

Decimal point: Choose the decimal symbol.

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Set up the Instrument: Input Settings

Input Settings

Input settings ensure that you are collecting accurate data. The instrument optimizes the frequency response based on the selected microphone and makes corrections based on the selected sound field and windscreen.

How to Set up the Input

Open the menu.

From the instrument: Press briefly to open the menu.

From the mobile app: Tap to open the instrument menu.

Go to: Measurement settings > Input.

3. Specify the microphone that is attached to the instrument.

4. Choose the sound field in which you are measuring: free or diffuse.

Set Windscreen detect to:

l Enabled: The instrument detects the windscreen and applies the appropriate correction l Disabled: Specify the windscreen manually under Windscreen type

About the Microphone

The instrument comes with a factory-calibrated microphone, Type 4966, and is set up to use this microphone as default, meaning that the microphone is listed in the microphone database.

If you want to change microphones:

Add the microphone to the microphone database.

Press briefly to open the menu.

b. Go to: System settings > Advanced settings.

c. Enable Service mode.

Go to: Microphones.

e. Select any microphone and choose Create new. A new microphone Type4966 will be created and

added to the list.

f. Select the new microphone and choose Edit.

g. Edit the microphone's type and serial numbers.

2. Select the new microphone and choose Select to use the new microphone for the input.

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Set up the Instrument: Measurement Control

About Sound Fields

It is important that the instrument knows the type of sound field in which you are measuring so it can apply the appropriate correction to your measurements. Theses corrections will enhance the overall frequency response of the system regardless of whether or not the microphone you are using is designed for the sound field in which you are measuring.

l Choose Free-field if you are in an environment with no (or very few) objects or surfaces that will reflect sound.

Free-field sounds generally come from the sound source

l Choose Diffuse-field if you are in an environment with lots of objects or surfaces that reflect sound. Diffuse-field

sounds come randomly from all angles (random incidence) due to reflection off surfaces within the environment

✐ Note: Generally, ISO requires free-field conditions and ANSI requires diffuse-field conditions. Be sure to check your local standards for the setting you require.

Measurement Control

Measurement control settings specify how your measurements will run.

How to Set up Measurement Controls

Open the menu.

From the instrument: Press briefly to open the menu.

From the mobile app: Tap to open the instrument menu.

2. Go to: Measurement settings > Measurement control.

Choose whether or not to log data.

If you enable Logging mode, specify a Logging interval.

4. Set Measurement time to Preset or Free.

Choose whether or not to back-erase when resuming a paused measurement.

If you enable Back-erase mode, specify a time in Back-erase time.

✐ Note: Back-erase will not be applied to logged data.

About Logging Mode

Logging measures and saves data periodically on the internal disk and thus creates a profile of measurement data. Measurements are restarted for each interval. This is done in addition to also measuring the data for the total measurement time.

l Disable to turn off Logging mode

Enable to save data at intervals, with the interval specified in Logging interval

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Set up the Instrument: Measurement Control

The instrument can log broadband parameters as well as spectrum parameters.

About Measurement Time

Preset measurement time means that the instrument will measure for the specified Preset time, then stop and save automatically

Free measurement time means that you control the measurement manually

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Set up the Instrument: Measurement Parameters

About Back-erase Mode

This setting determines what happens when you resume a paused measurement.

Hint: You can change these settings while a measurement is paused.

Enable: Overwrite measurement data for the Back-erase time

Disable: Resume the measurement without overwriting earlier data

Measurement Parameters

How to Set up Broadband Parameters

The instrument measures basic broadband sound level parameters with frequency weightings that mimic how humans hear sounds and time weightings that define the averaging of sound levels over time. The different parameters that you can measure are combinations of the basic parameters (Leq, Lpeak, Lmax and Lmin) with frequency weightings (A, B, C or Z) and time weightings(F, S or I).

You can make measurements with up to two frequency weightings simultaneously.

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Use the Instrument

Press briefly to open the menu.

2. Go to: Measurement settings > Broadband parameters.

Enable a frequency weighting.

Set up the Instrument: Measurement Parameters

Press to navigate to a weighting box.

Press to scroll through the frequency weightings.

c. Stop at the desired frequency weighting.

Enable parameters to measure.

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Press to navigate to a parameter.

Press to enable / disable parameters.

Navigate to .

Press to close the parameter selection menu.

Use the Mobile App

Tap to open the instrument menu.

Go to: Measurement settings > Broadband parameters.

Set up the Instrument: Measurement Parameters

Enable a frequency weighting:

Tap one of the weightings on the bottom toolbar.

Tap the weighting line.

c. Tap On.

✐ Note: To enable a different frequency weighting, disable the unwanted frequency weighting first.

Enable or disable broadband parameters using the same process.

a. Tap a parameter.

b. Tap On to enable or Off to disable the parameter.

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About Parameters

Time-averaged Levels

The instrument can average levels of the sound source over time.

Leq = equivalent continuous sound level

This parameter calculates a constant level of noise with the same energy content as the varying acoustic noise signal being measured.

LE = sound exposure level

This parameter takes the sound levels for a period of time and calculates the constant sound level that would produce the same total sound energy in one second. Sound level exposure is sometimes called single event level (SEL).

Peak Levels

Lpeak = peak sound level

This parameter gives the highest value of the frequency-weighted acoustic signal.

Exponential-averaged Levels

Set up the Instrument: Measurement Parameters

The exponential averaged sound levels provide easy-to-read values. A number of parameters are derived from the exponential averaging:

Lmax = maximum sound level

This parameter gives you the highest time-weighted sound level that occurs during the measurement time.

Lmax is often used in conjunction with another noise parameter (for example, Leq) to ensure a single noise event does not exceed a limit.

Lmin =minimum sound level

This parameter gives you the lowest time-weighted sound level that occurs during the measurement time.

L = instantaneous sound level

This parameter shows the instantaneous time-weighted sound level as measured by the instrument.

L(SPL) = sound pressure level

This parameter calculates the maximum time-weighted sound level during the latest second.

✐ Note: L and L(SPL) are instantaneous values for display only and are not saved with the measurement.

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Set up the Instrument: Measurement Parameters

About Time Weightings

The instrument uses three standard-defined time weightings: F, S and I. Time weightings define the exponential averaging in the root-mean-square (RMS) measurement to average the fluctuations in sound levels and create useful readings.

Time weightings use time constants. Time constants define the time it takes for the instrument to respond to a change in sound levels.

F = 125 ms time constant, decay of 34.7 dB/s

The fast rise and decay of this time weighting means it will show a lot of the variations in the acoustic signal. You can use this weighting to measure sounds that fade rapidly, such as a dog bark.

✐ Note: F time weighting can be used for most measurements.

S = 1 s time constant, decay of 4.3 dB/s

The relatively slow rise and decay of this time weighting means it will smooth the variations in the acoustic signal. You can use this weighting to measure sounds that fade slowly, such as a bell toll.

I = 35 ms time constant, decay of 2.9 dB/s

When choosing a time weighting to use, ask yourself if you want to track or smooth the variations in sound levels over time.

About Frequency Weightings

Frequency weightings mimic how humans hear sound.

A-weighting

l Represents the human ear’s response at low to medium sound levels l Corresponding equal loudness curve: 40dB l The most commonly applied frequency weighting l Can be used for all sound levels

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Set up the Instrument: Measurement Parameters

B-weighting

l Represents the human ear’s response at medium sound levels l Corresponding equal loudness curve: 70dB

C-weighting

l Represents the human ear’s response at fairly high sound levels l Corresponding equal loudness curve: 100dB l Mainly used when assessing peak values of high sound pressure levels (LCpeak)

Z-weighting

l Without any frequency weighting

✐ Note: An equal loudness curve is a frequency response curve. Equal loudness curves are the experimental results of presenting pure tones and levels at different frequencies to young people with no hearing impairment. Along a contour line the young, average, normal listener will judge tones presented with different combinations of frequency and dB to be equally loud.

Table of Parameters

This table gives an overview of all the possible parameter / frequency weighting combinations.

✐ Note: The parameters are listed as they appear in the Broadband parameters menu.

A C Z B

Leq LAeq LCeq LZeq LBeq

Lpeak LApeak LCpeak LZpeak LBpeak

LFmax LAFmax LCFmax LZFmax LBFmax

LSmax LASmax LCSmax LZSmax LBSmax

LFmin LAFmin LCFmin LZFmin LBFmin

LSmin LASmin LCSmin LZSmin LBSmin

LFTeq LAFTeq

LIeq LAIeq

LImax LAImax

LE LAE LCE LZE LBE

LF LAF LCF LZF LBF

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Set up the Instrument: Measurement Parameters

LS LAS LCS LZS LBS

LF(SPL) LAF(SPL) LCF(SPL) LZF(SPL) LBF(SPL)

LS(SPL) LAS(SPL) LCS(SPL) LZS(SPL) LBS(SPL)

Spectrum Parameters

Spectrum parameters are the parameters upon which you can perform spectral analysis. Spectral analysis is used to assess sounds with distinct tones.

Measure spectrum parameters (Leq, Lmax and Lmin) with frequency weightings (A, B, C, or Z) and time weightings (F and S).

How to Set up Parameters for Spectral Analysis

Open the menu.

From the instrument: Press briefly to open the menu.

From the mobile app: Tap to open the instrument menu.

2. Go to: Measurement settings > Spectrum parameters.

3. Choose the bandwidth: 1/1- or 1/3-octave.

4. Enable parameters for analysis with the desired frequency weighting.

About Bandwidth

The bandwidth of the frequency analysis. You can choose 1/1-octave or 1/3-octave, choose the one that best matches your need for spectral details. The range of the centre frequencies are:

l 1/1-octave: 16 Hz to 8 kHz l 1/3-octave: 12.5 Hz to 16 kHz

About Parameters

Leq = equivalent continuous sound level

This parameter calculates a constant level of noise spectrum with the same energy content as the varying acoustic noise signal being measured.

Lmax = maximum sound level

This parameter gives you the highest time-weighted sound level per frequency band that occurs during the measurement time.

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Set up the Instrument: Measurement Parameters

Lmax is often used in conjunction with another noise parameter (for example, Leq) to ensure a single noise event does not exceed a limit.

Lmin =minimum sound level

This parameter gives you the lowest time-weighted sound level per frequency band that occurs during the measurement time.

L = instantaneous sound level

This parameter shows the instantaneous time-weighted sound level spectrum as measured by the instrument.

✐ Note: L is an instantaneous spectrum for display only and is not saved with the measurement.

About Time Weightings

Time weightings use time constants. Time constants define the time it takes for the instrument to respond to a change in sound levels.

F = 125 ms time constant, decay of 34.7 dB/s

The fast rise and decay of this time weighting means it will show a lot of the variations in the acoustic signal. You can use this weighting to measure sounds that fade rapidly, such as a dog bark.

✐ Note: F time weighting can be used for most measurements.

S = 1 s time constant, decay of 4.3 dB/s

I = 35 ms time constant, decay of 2.9 dB/s

When choosing a time weighting to use, ask yourself if you want to track or smooth the variations in sound levels over time.

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About Frequency Weightings

Frequency weightings mimic how humans hear sound.

A-weighting

l Represents the human ear’s response at low to medium sound levels l Corresponding equal loudness curve: 40dB l The most commonly applied frequency weighting l Can be used for all sound levels

Set up the Instrument: Measurement Parameters

B-weighting

l Represents the human ear’s response at medium sound levels l Corresponding equal loudness curve: 70dB

C-weighting

l Represents the human ear’s response at fairly high sound levels l Corresponding equal loudness curve: 100dB l Mainly used when assessing peak values of high sound pressure levels (LCpeak)

Z-weighting

l Without any frequency weighting

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Set up the Instrument: Measurement Parameters

Table of Parameters

This table gives an overview of all the possible parameter / frequency weighting combinations.

✐ Note: The parameters are listed as they appear in the Spectrum parameters menu.

A C Z B

Leq LAeq LCeq LZeq LBeq

LFmax LAFmax LCFmax LZFmax LBFmax

LSmax LASmax LCSmax LZSmax LBSmax

LFmin LAFmin LCFmin LZFmin LBFmin

LSmin LASmin LCSmin LZSmin LBSmin

LF LAF LCF LZF LBF

LS LAS LCS LZS LBS

Statistical Parameters

Statistics can be calculated for broadband measurements. Broadband statistics are calculated with 0.2 dB class with over 130 dB range.

How to Set up Parameters for Statistical Analysis

Open the menu.

From the instrument: Press briefly to open the menu.

From the mobile app: Tap to open the instrument menu.

2. Go to: Measurement settings > Statistical parameters.

3. Choose the Basis parameter you want to sample: LAeq, LAF or LAS.

4. Set the percentile levels (LN), up to 5.

About Basis Parameters

The Basis parameter specifies the parameter to sample. In other words, the parameter you choose will characterize the statistical data that the instrument collects.

LAF is sampled every 16 ms

LAF is the instantaneous time-weighted (F) sound level with frequency weighting A.

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Set up the Instrument: Audio Recording

LAS is sampled every 128 ms

LAS is the instantaneous time-weighted (S) sound level with frequency weighting A.

LAeq is sampled every 1 s

LAeq is the equivalent continuous sound level with frequency weighting A.

About Percentiles

You can set up to five percentile levels (LN values).

Percentile level values are calculated for the total measurement. The percentile levels that you specify will tell you the distribution of sound levels in your measurement. For example, if you set a percentile level of 90, the result is the sound level that is exceeded for 90% of the measurement period.

Audio Recording

Audio signal can be recorded and stored as listen-quality MP3 files (compressed to 3 % of original signal). When enabled, the audio will record for the duration of the measurement time.

How To Record Audio

Open the menu.

From the instrument: Press briefly to open the menu.

From the app: Tap to open the instrument menu.

2. Go to: Measurement settings > Audio recording.

3. Set Listen quality to Enabled.

Display Settings

Display settings control how the instrument screen looks (brightness, colour scheme), the brightness of the light ring, and the data that is displayed.

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How to Change Display Settings

Open the menu.

From the instrument: Press briefly to open the menu.

From the app: Tap to open the instrument menu.

Go to: Display settings.

3. Adjust the screen settings:brightness and colour scheme.

4. Select the brightness of the light ring.

Set up the displays for your measurements.

Go to SLM view to set up the instantaneous display (bar graph) and the readout for one broadband parameter

Go to List view to set up the instantaneous display (bar graph) and readouts for multiple broadband parameters (three on the instrument, five on the mobile app)

Go to Spectrum view to set up display of spectrum parameters

Set up the Instrument: Display Settings

Go to Profile view to set up display of logged parameters

l Go to About data view to enable display of information about the data

About Screen Settings

Screen brightness: Choose from six levels of brightness.

Colour scheme: Choose light or dark.

About Light Ring Brightness

Light ring brightness controls the brightness of the light ring on the instrument. Choosefrom four settings:Off, Low, Normal or High.

About Measurement Display Settings

Graph parameter (SLM view and List view)

Choose the parameter for the bar graph; that is, the instantaneous (or fast) display of instantaneous sound levels.

Parameter (Spectrum view)

Choose the parameter for the spectrum display; that is, the display of sound levels by frequency.

Parameter (Profile view)

Choose the parameter for the profile display; that is, the display of logged sound levels by time.

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Set up the Instrument: Display Settings

Graph max level, Graph min level (All views)

SLM view and List view: Define the range (maximum and minimum levels) for the bar graph in dB.

Spectrum view: Define the range (maximum and minimum levels) for the bar graph in dB.

Profile view: Define the range (maximum and minimum levels) for the line graph in dB.

The range that you define should match the dynamics of the signal you are measuring. In other words, it should include all the sound levels that are present.

Parameter (SLM view)

Choose the parameter to display in the area below the bar graph.

Parameter 1, 2 and 3 (List view)

Choose up to three parameters to display as a list below the bar graph. You do not have to define all three, choose None to leave a list item blank.

Display

Enable or disable the display.

About Data View

About data view displays information about the instrument with which you are measuring. It can also include the location of the instrument (latitude and longitude) using GPS (global positioning system).

To enable latitude and longitude coordinates in the About data view:

Enable Service mode on the instrument.

Press briefly to open the menu.

b. Go to: System settings > Advanced settings > Service mode.

c. Select Enabled.

2. Using the instrument or the mobile app, go to:System settings > Advanced settings > GPS location.

3. Select Enabled.

✐ Note: To enable latitude and longitude coordinates in the About data view using the mobile app, Service mode must be enabled on the instrument.

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Set up the Instrument: Voltage Output

Voltage Output

The USB-C socket is the output channel. Use an output cable such as AO-0846 to collect the signal.

To set up the instrument to generate an output signal:

Open the menu.

On the instrument: Press briefly to open the menu.

On the mobile app:Tap to open the instrument menu.

2. Go to: System settings > Voltage output > Source.

Select:

l Input X-weighted for listening purposes l LXF as 10 mV/dB

X corresponds to the frequency weightings that are enabled in Measurement settings.

Lock the Settings

After you have finished setting up the instrument, you can lock the measurement, display and system settings to prevent changes.

1. Go to: Menu > System settings > Advanced settings > Service mode.

2. Select Enabled.

3. Go to: Lock settings.

4. Select Enabled.

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Check the Calibration: How to Perform a Calibration Check

CHECK THE CALIBRATION

It is a best practice to check the accuracy of your instrument before and after measuring by performing a calibration check. A calibration check is not a calibration. Calibration includes an adjustment of the instrument's sensitivity. A cal- ibration check compares the current sensitivity of the instrument with the sensitivity from its initial calibration, checking that it has not changed too much.

When you place a sound calibrator on the microphone, the instrument detects the tone and automatically checks the deviation of the sensitivity of the instrument from its initial calibration.

How to Perform a Calibration Check

You will need:

The instrument

A sound calibrator such as Type4231

A sound calibrator generates a known sound level, against which the measured level can be checked. Type4231 generates a tone at 1kHz with levels at 94dB or 114dB

✐ Note: Be sure to add the calibrator's serial number in the calibration settings of the instrument. Go to:Menu > System settings >Advanced settings > Calibration > Type 4231 no.

Procedure:

Turn on the instrument.

✐ Note: Ensure that the instrument is not measuring and that the menu is not open.

Gently seat the calibrator on the microphone.

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Turn on the sound calibrator.

Check the Calibration: How to Perform a Calibration Check

4. After a short period the instrument will initiate a calibration check, choose Yes.

The calibration check will have one of two results:

l Pass – the measured sound level is within tolerance. The instrument is ready for use l Fail – the measured sound level is greater than the acceptable tolerance. The instrument should be recal-

ibrated or serviced

Exit the calibration check.

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Check the Calibration: Calibration History

Calibration History

Go to: Menu > Calibration history

Here you can view an instrument's history of calibrations and calibration checks.

Calibration Settings

Go to Menu > System settings > Advanced settings > Calibration for calibration settings.

Automatic Calibration Check

The instrument is set to perform a calibration check automatically by default.

To change this setting, set Automatic check to Disabled.

Calibration Reminder

The instrument is set to remind you when it is time to calibrate by default.

To change the settings:

1. Enable Service mode.

2. Go to: Calibration.

3. Edit the settings for Calibration reminder and Calibration interval as desired.

Custom Calibration

The instrument is set to use Sound Calibrator Type4231 by default.

To use a different calibrator and set a custom calibration level:

1. Go to:Calibrator.

2. Select Custom.

3. Select Custom calibrator no. to add the calibrator's serial number.

4. Select Custom level to specify the sound level in dB.

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Create a Project: How to Delete a Project

CREATE A PROJECT

Projects are collections of measurements, markers and annotations.

Projects are named incrementally and organized by date and time. Projects are stored on the instrument and transferred to the PC app for post-processing (analysis and report generation).

To start a new project:

1. Connect the mobile app to the instrument.

Tap Create new project.

Once you create a project, open the project to add measurements and set up markers.

How to Delete a Project

In the list of projects, swipe left on a project and select Delete.

Add Past Measurements

You can add past measurements that are stored on the instrument to any project.

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Open an existing project or create a new one.

Tap Import.

Create a Project: Add Past Measurements

Tap a measurement to add it to the project.

4. Repeat as needed.

To delete measurements from a project, swipe left and tap Delete.

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Create a Project: Set up Markers

Set up Markers

Use markers to mark your logged measurements. Adding markers to your measurement can provide you with valuable information when processing the data. For example, if you are measuring the noise from a factory in a neighbourhood, you might want to mark when a dog is barking so that it is not attributed to the factory. The mobile app has four colourcoded markers that you can edit to suit your needs.

Open an existing project or create a new one.

Tap Setup.

Tap Markers.

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Tap a marker.

Create a Project: Set up Markers

Tap the marker name to rename it.

Tap the function to select a function for the marker.

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✐ Note:

l The changes to a marker only affect markers placed in future measurements. l You can also edit the Exclude marker. l You can assign a different colours to the markers using the PC app.

Create a Project: Set up Markers

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Measurements: Make a Measurement

MEASUREMENTS

Make a Measurement

The exact steps of a measurement will vary depending on the settings you use in Measurement control.

A basic overview is as follows:

Press to start a measurement.

If necessary, press to pause.

Press to resume.

Press to stop the measurement.

At this point, you can review the results of the measurement.

Press again to clear the data from the last measurement and return the instrument to its ready state.

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Measurements: Make a Measurement

✐ Note:

l You will not need to stop the measurement if it has a preset time. See:Menu > Measurement settings > Meas-

urement control

l Data is stored automatically upon stopping l If you are using the instrument with the mobile app, annotations will be synced with the measurement and

saved on the instrument

Data explorer

Go to: Menu >Data explorer

Browse the measurements stored on the instrument, with the option to open or delete measurements.

1. Navigate to the desired folder.

Press .

Choose Open to view the measurement on the instrument.

✐ Note:

Press to close the measurement

l Opening a measurement changes the current settings of the instrument to the settings of the meas-

urement

Or choose Move to Trash to move the measurement to Trash.

To open the trash folder, go to: Data > Show Trash. Once you empty the trash, measurements will be permanently deleted.

Data Management

Go to: System settings > Data management

Data Retention

Data retention is set to Manual by default. This means that you will need to manually remove measurement data from the instrument.

To set the instrument to remove data automatically:

1. Set Data retention to Automatic.

2. Specify the number of days to keep the data (Retention period).

After the specified number of days, data will be moved to Trash.

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Measurements: Use the App to Make a Measurement

Use the App to Make a Measurement

The exact steps of a measurement will vary depending on the settings you use in Measurement control.

A basic overview is as follows:

Open an existing project or create a new one.

Tap Measure.

Tap to start a measurement.

Hint: You can also start a measurement by placing a marker.

To pause, slide to the left.

Tap to resume.

Slide to the right to stop the measurement.

✐ Note: It will not be necessary to stop the measurement if you specified a measurement time in Meas- urement control.

Tap to reset the analyzers for the next measurement.

✐ Note: Measurement data is only stored on the instrument.

Place Markers

You can use all four markers multiple times in each logging measurement.

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Measurements: Place Markers

How to Add a Marker

✐ Note: To enable markers for a measurement, make sure that Logging mode is set to Enabled.

Tap a marker at the start of an event.

Hint: Tap a marker to start a measurement if the instrument is not measuring.

2. Tap the marker at the end of the event.

3. Repeat as needed.

How to Remove a Marker

You can remove markers from measurements using the mobile app during or after a measurement.

1. In the profile view of a measurement, tap a marker.

2. Tap Delete Marker.

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ANNOTATIONS

Use the mobile app to add notes to your measurement.

How to Make Annotations

From the measurement screen, tap .

Annotations : How to Make Annotations

Choose the kind of annotation you want to add:

Snap a photo, make a recording or write a note.

: Photos

: Videos

: Notes

: Commentaries

4. Repeat as needed.

✐ Note:

l You can also use photos and video from the gallery on your mobile device by selecting the gallery icon when the

camera is open

l To delete an annotation: go to Annotations, swipe left on the unwanted annotation and tap Delete

You can make annotations before, during and after measurements. Annotations made during a measurement upload to the instrument automatically and are stored with the measurement data to which they belong. Annotations made before and after measurements will be stored on the instrument as unattached annotations, you can attach them to a measurement in the mobile app or the PC app.

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Annotations : How to Attach Unattached Annotations Using the Mobile App

How to Attach Unattached Annotations Using the Mobile App

To attach an annotation to a measurement, a measurement must be open or in progress.

Navigate to Annotations.

Tap Attach at the desired annotations (or tap if you want to create more annotations.)

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Transfer Data : How to Import Data to the PC App

TRANSFER DATA

You will need to move your data from the instrument in order to process it. You can transfer data using one of the following methods:

l Import data from the instrument to the PC app then save it as a project to a local or shared location l Store a backup of your data on a USBstick or network then access it from the PC app

How to Import Data to the PC App

You will need:

l Your instrument l A PC installed with the PC app l A USB cable

Procedure:

Connect the instrument to the computer using the cable.

Hint: Instead of using a cable, connect the two devices to the same network using Wi-Fi®.

In the PC app, click .

Find your instrument in the import dialog and select it.

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✐ Note: To import from a backup, click on the storage location.

4. Click Measurements/Annotations.

Select the data you want to transfer.

Transfer Data : How to Import Data to the PC App

Click Import.

Hint: Use <Ctrl> or <Shift> to select multiple measurements or annotations.

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Transfer Data : How to Add an Instrument using Its IP Address

Data, including attached annotations and markers will be imported to the PC app where it can be saved as a project.

✐ Note: If you import multiple measurements with markers, the markers from different measurements that have the same name will be treated as the same marker type upon import.

How to Add an Instrument using Its IP Address

✐ Note: Use this functionality to connect to your instrument remotely.

In the import dialog, click .

2. Select Add instrument from IP address.

Enter the IP address or host name.

l For local connections, you can find the IPaddress of the instrument here:Menu > System settings > Net-

work settings > Wi-Fi settings or Ethernet settings

l For remote connections, the IP address or host name will depend on your setup. Refer to Remote Con-

nections for information about which IPaddress or host name to use

How to Store a Backup

You can set up your instrument to store backups of your data to a USBstick or network storage (either a network attached storage (NAS) device or a shared folder). Data transfers automatically when the storage device is available and an icon on the instrument indicates the status of the backup.

Network Storage

You will need:

l Network storage l Your instrument

✐ Note: If you are using NAS, you will need to set it up according to the manufacturer's instructions first.

Procedure:

1. Go to: Menu > System settings > Data management > Backup settings > Backup.

2. Select Disabled.

3. Enter the host name or IP address of the device or network (so the instrument can find it).

4. Enter the user name and password (so the instrument can access the device or network).

5. Specify the path (so the instrument knows where to upload the data.)

Specify the domain if the network belongs to a domain.

7. Set Backup to Network storage.

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Transfer Data : How to Store a Backup

USB Stick

You will need:

l A USB-C (or USB-A with an adaptor) memory stick with at least 16 GByte formatted as FAT32 or exFAT l Your instrument

Procedure:

1. Go to: Menu > System settings > Data management > Backup settings > Backup.

2. Select USB stick.

3. Insert the USB stick. The transfer will start automatically.

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Use the PC App: PC App GUI

USE THE PC APP

PC App GUI

The application tab opens / closes the system menu where you will find information about the application and its options.

Options:Change the language of the GUI

About:Information about the application

Exit: Close the application

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These are the tools that control the operation of the application.

Use the PC App: PC App GUI

: Create a new project

: Open an existing project

: Save the current project

:Save the current project under a new name or in another location

:Import data from the instrument or network storage

: Export project contents into another format

: Open the help

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Use the PC App: PC App GUI

When you open a project or import data, you will see the individual measurements in the project browser window. Select measurements to view them.

l Project Name: Unnamed projects appear as Untitled in the toolbar

: Select all measurements in the project browser

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Unattached Annotations displays annotations that are not linked to a measurement.

Use the PC App: PC App GUI

Unattached annotations are organized by type:Gallery (photos and videos), Commentaries and Notes.

Tasks, such as importing data or exporting a project, are displayed in this window.

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These tabs are for switching between the Measurement and Gallery windows.

Use the PC App: PC App GUI

Within the Measurement window, there are two areas. The upper section is an overview of the selected measurements in a project. It will help keep you oriented while you investigate the graph and table views in the section below.

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In this panel, you will find collapsible windows for viewing data and your annotations.

Use the PC App: Import a Project

l Spectrum: View frequency analysis data l Gallery: View photos and videos attached to the measurement l Commentaries: Listen to voice memos attached to the measurement l Notes: Read the notes attached to the measurement l Marker Settings:Edit the name and function of the markers for the project

Import a Project

Projects that are made using the mobile app are stored on the instrument. You can import the entire project to the PC app from the instrument.

✐ Note: If you have set up the instrument to store a backup of its data on network storage or USB stick, you can import projects from the storage location.

You will need:

l The PC app installed on your computer l A project that has been created using the mobile app

How to Import a Project

1. Open the PC app.

Connect the instrument to the computer using the cable.

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Hint: Instead of using a cable, connect the two devices to the same network using Wi-Fi®.

In the PC app, click .

Find your instrument in the import dialog and select it.

Use the PC App: Import a Project

✐ Note: To import from a backup, click on the storage location.

5. Click Projects.

Select the project you want to import.

✐ Note: You can only import one project at a time.

Click Import.

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Use the PC App: Import a Project

Import from a Backup

The first time you import from a backup, you will need to tell the PC app where the backup is stored.

You will need:

l An instrument that is set up to store a backup of its data, see Transfer Data l Data in the backup

Procedure:

In the import dialog, click .

2. Click Add NAS.

Browse to the location of the backup.

✐ Note: Your computer will need to be able to access this location.

4. Select the folder with the matching serial number of your instrument.

5. Click Select Folder.

Add an Instrument Using its IPAddress

✐ Note: Use this functionality to connect to your instrument remotely.

In the import dialog, click .

2. Click Add instrument from IP address.

Enter the IP address or host name.

Enter the IP address or host name, and if used, the password.

l For local connections, you can find the IPaddress of the instrument here:Menu > System settings > Net-

work settings > Wi-Fi settings or Ethernet settings

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Use the PC App: Create a Project

l For remote connections, the IP address or host name will depend on your setup. Refer to Remote Con-

nections for information about which IPaddress or host name to use

4. Click OK.

Create a Project

If you did not create a project using the mobile app, you can create a project in the PC app then import measurements as needed.

You will need:

l The PC app installed on your computer l Some measurements

Procedure:

1. Open the PC app.

Click .

Give the file a name and click Save.

The defaults are:

l Name: Untitled l Location: C:\Users\USER\Documents\Enviro Noise Partner

You are now ready to add measurements to your project.

Import Measurements

Import measurements to add them to a project. You can add measurements to empty projects or to projects that already contain measurements.

✐ Note: If you import multiple measurements with markers, the markers from different measurements that have the same name will be treated as the same marker type upon import.

You will need:

l A project open in the PC app l One or more measurements

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How to Import Measurements

Connect the instrument to the computer using the cable.

Hint: Instead of using a cable, connect the two devices to the same network using Wi-Fi®.

In the PC app, click .

Use the PC App: Import Measurements

Find your instrument in the import dialog and select it.

✐ Note: To import from a backup, click on the storage location.

4. Click Measurements/Annotations.

Select the data you want to transfer.

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Click Import.

Use the PC App: Import Measurements

Hint: Use <Ctrl> or <Shift> to select multiple measurements or annotations.

Import from a Backup

The first time you import from a backup, you will need to tell the PC app where the backup is stored.

You will need:

l An instrument that is set up to store a backup of its data, see Transfer Data l Data in the backup

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Use the PC App: Examine the Project

Procedure:

In the import dialog, click .

2. Click Add NAS.

Browse to the location of the backup.

✐ Note: Your computer will need to be able to access this location.

4. Select the folder with the matching serial number of your instrument.

5. Click Select Folder.

Add an Instrument Using its IPAddress

✐ Note: Use this functionality to connect to your instrument remotely.

In the import dialog, click .

2. Click Add instrument from IP address.

Enter the IP address or host name.

Enter the IP address or host name, and if used, the password.

l For local connections, you can find the IPaddress of the instrument here:Menu > System settings > Net-

work settings > Wi-Fi settings or Ethernet settings

l For remote connections, the IP address or host name will depend on your setup. Refer to Remote Con-

nections for information about which IPaddress or host name to use

4. Click OK.

Examine the Project

The Measurement Window

The Measurement window displays the single or logged decibel (dB) levels of measured broadband and spectrum parameters, as well as the dB levels for statistical parameters. It includes a graph in the upper section that helps keep you oriented as you view the graphs and tables in the lower section.

Switch Views

Once you select measurements in the project, you can view the measurement data as graphs or in a table.

Click to switch between the graph and table views.

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Use the PC App: Examine the Project

The Graph View

For single measurements, that is when Logging mode is disabled, each measured parameter is a single, calculated dB level for the total measurement time. This means that their graphs will be horizontal lines. You can use this display to easily see the differences in the calculated values for each measured parameter.

For logged measurements, each measured parameter is a profile that consists of multiple dB levels calculated at each interval over the total measurement time. This means that you can view the fluctuations of sound levels over time.

Hide or Show Parameters

1. Right click in the graph.

Click on the parameters you would like to hide or show.

Broadband parameters are at the top of the list.

Statistical parameters are listed below broadband parameters and show the percentile, for example: LAF50.0.

Spectrum parameters are in a submenu. Mouse over Octaves (1/3 or 1/1), then mouse over a parameter and select the frequency or frequencies you would like to show.

✐ Note: The right-click menu will only show measured parameters.

Parameters are colour coded:

l Leq = blue l Lmax = red l Lmin = green l Lpeak = purple

Frequency weightings are style coded:

l A =solid line l C = dotted line l Z =bold line l B =dashed line

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Use the PC App: Examine the Project

Read Levels

Click on a graph to place a cursor.

For single measurements, the cursor shows dB levels for all visible parameters and time information. The time information is the measurement start with the total measurement time (in parentheses).

For logged measurements, the cursor shows dB levels for all visible parameters and time information. The time information is the time at which the cursor is placed and the logging interval (in parentheses).

✐ Note:

l You can view frequency analysis data for the time at which the cursor is placed in the Spectrum view l For long measurements, measurement data will be down-sampled to display the entire logging profile in the win-

dow. This means that the logging interval will be scaled 10, 100 or more times depending on the length of the measurement and the logging interval used. When you zoom in on the profile, the scale of the data will automatically adjust

You can use the left and right arrow keys on your keyboard to move the cursor or click on the time readout in the lower graph and enter a specific time to jump to that time.

Select a Range

In either of the graphs, click and drag to select a range.

You can adjust the boundaries of the range by clicking and dragging the left or right cursor in the lower graph.

Zoom

There are many ways to get a closer look at your data:

l In the large graph, click on a measurement number to zoom in on the measurement l Select a range, then right-click and select Zoom. Select Unzoom to zoom out l Double-click the y-axis to scale the graph to the shown levels

Hint: When you zoom in, you can use the overview to stay oriented within the project.

Add Markers

You can add markers to a measurement in the PC app.

1. Select a range.

2. Right-click.

3. Mouse over Add Marker.

4. Select the desired marker from the submenu.

✐ Note: Edit marker names and their functions at any time in Marker Settings.

Select a Marker

In the lower graph, click on the coloured bar at the top of the marked region to select the marker.

When you select a marker, you can view any frequency analysis data for that marker in the Spectrum view.

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Use the PC App: Examine the Project

Delete Markers

1. Right-click on a marker.

2. Select Delete Marker to remove the marker from the measurement.

Change Markers

1. Right-click on a marker.

2. Mouse over Change Marker to open a menu of markers.

3. Select the desired marker.

Adjust Markers

Change the boundaries of the marker using the PC app.

1. Select a marker.

2. Click and drag the cursors as needed.

Listen to Audio

If you have set up the instrument to record audio, the audio playback controls are at the bottom of the Measurement window.

l Playback speed options: 1×, 1.25×, 1.5×, 2× or 4× l Digital gain options: Choose a value from 0 to 60dB, in 5dB increments

The Table View

The table shows information and dB levels for all measured parameters of each measurement selected in the project, for both total measurement time and the cursor. If your project includes more than one measurement, the table includes calculations of the sum of all selected measurements, shown in bold font.

For projects with markers, the table shows information about each marker in the selected measurements, and calculations of the dB levels for each individual marker as well as the sum of all markers of the same type.

Hint:

l Right-click on the table and select Copy to copy its contents to your clipboard l The table will automatically update if you move the placement of the cursor in the upper graph

The Spectrum Window

The Spectrum window displays the frequency analysis data of measured spectrum parameters. You can view and interact with the spectrum graph or view the data as a table of values.

Display Data

Once you select measurements in the list of measurements in the project, you can view up to two sets of data simultaneously in the Spectrum window. One set of data displays as dashes (and corresponds to the fields in line with )

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Use the PC App: Examine the Project

while the other set of data displays as bars (and corresponds to the fields in line with ). Change the fields to change

the data that is being displayed.

Use the measurement drop-down to switch between measurements if more than one measurement is selected in the measurement list.

✐ Note: If only one measurement is selected in the list of measurements, select a different measurement to change the displayed measurement.

2. Select Total to display the spectrum for the total measurement or Cursor to display the spectrum for the time at

which the cursor is placed.

Use the parameter drop-down to choose the spectrum parameter to display.

Hint: If you are displaying cursor data in the Spectrum window, the data will automatically update if you move the

cursor in the Measurement window.

Switch Views

Click to switch between the graph and table views.

The Graph View

The graph displays decibel (dB) levels as a function of frequency (Hz).

l Read Levels: Click on the graph to view a readout of the level at each frequency. l Zoom in or out:Mouse over the graph then scroll up or down to change the scale of the y-axis. l Fit to levels:Double-click in the region next to the y-axis to fit the scale to the levels of the graph.

The Table View

This view shows the data as a table of dB levels at each frequency.

Hint:

l Right-click on the table and select Copy to copy its contents to your clipboard l If you are displaying cursor values in the table the cursor in the Measurement window to change the

Review Annotations

If you created annotations using the mobile application, you can review them in the PC app.

Check out the Gallery

You will find any photos or video that have been attached to the measurements in the project in the Gallery window.

1. Select measurements in the project browser.

2. Open a Gallery window.

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Use the PC App: Examine the Project

Use the arrows to browse.

✐ Note: Videos will be identifiable by a play button.

Listen to Commentary

You will find any voice memos that have been attached to the measurements in the project in the Commentaries window.

1. Select measurements in the project browser.

2. Open the Commentaries window.

3. Press the play button.

Read Notes

You will find any notes that have been attached to the measurements in the project in the Notes window. Each note is stamped with the date and time.

1. Select measurements in the project browser.

2. Open the Notes window.

See When Annotations Were Made

1. Select measurements in the project browser.

2. Open the Measurement window.

Notice the icons: , , and .

✐ Note: Annotations made while logging will be visible in the profile.

How to Attach or Detach Annotations

Sometimes you need to move an annotation. In the PC app, it is easy to, for example, attach an unattached annotation to a measurement, or move an attached annotation from one measurement to another, or detach an unwanted annotation from a measurement.

1. Find an annotation that you want to move.

Do one of the following:

l Click and drag the annotation where you want it l Right-click on the annotation and select Cut or Copy then paste it where you want it

Work with Markers

Learn how to work with markers in your logged measurements using the PC app.

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Use the PC App: Examine the Project

Add a Marker

You can add markers to a measurement in the PC app.

1. Select a range.

2. Right-click.

3. Mouse over Add Marker.

4. Select the desired marker from the submenu.

✐ Note: Edit marker names and their functions at any time in Marker Settings.

Select a Marker

In the lower graph, click on the coloured bar at the top of the marked region to select the marker.

When you select a marker, you can view any frequency analysis data for that marker in the Spectrum view.

Adjust the Cursors

Change the boundaries of the marker using the PC app.

1. Select a marker.

2. Click and drag the cursors as needed.

Delete a Marker

1. Right-click on a marker.

2. Select Delete Marker to remove the marker from the measurement.

Change a Marker

1. Right-click on a marker.

2. Mouse over Change Marker to open a menu of markers.

3. Select the desired marker.

Change Marker Settings

Use the Marker Settings window to edit marker settings.

l Double-click on a name to change it. l Click on the colour square to select a new colour or define a custom colour. l Change the type of marker using the drop-down menu.

Marker Calculations

The PC app will calculate decibel (dB) levels for each individual marker and for all markers of the same type. You can view these values in the table view of the Measurement window.

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Export a Project

Export your project to a Microsoft® Excel® workbook or a text file.

How to Export a Project

1. In the project browser, highlight the measurements you want to export.

Click .

Use the PC App: Export a Project

3. Specify the name and location of the export file in the Destination file field.

Choose the format into which you want to export the project:

l Excel Workbook (*.xlsx) l Tab Separated Values (*.txt)

If you are exporting to a workbook, specify a master file:

l Choose EmptyMaster to export the complete set of data for the selected measurement l Choose FilterExample to export an example set of filtered data for the selected measurement l Choose ReportExample to export data to an example report l Choose one of your own master files

✐ Note:

l File extension *.xls is compatible with Microsoft® Excel 2003 and earlier l File extension *.xlsx is compatible with Microsoft® Excel 2007 and newer

Enable or disable:

l Launch Excel after export: Open the exported Excel file l Open in file explorer: Open the location of the exported file in the file explorer l Use invariant export language: It is recommended that you enable this setting if a program (or macro) is

going to interpret the parameters. This setting will output parameters in English and the names of the parameters will be kept over time from version to version of the program. This is not guaranteed for other languages, where the parameter names might change over time

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Use the PC App: Export a Project

l Export unattached annotations: Include unattached annotations in the exported file l Export raw statistical data: Include statistical data in the workbook

✐ Note: The export format you choose will affect the available options.

7. Click OK.

About Master Files

When you export a measurement to a workbook, the master file you choose tells the PC app what to do with the data.

EmptyMaster

EmptyMaster consists of an empty Excel file. Use this master file to export all data or to create your own master files.

FilterExample

FilterExample is an example of a master file that defines the measurement parameters to export.

ReportExample

ReportExample is an example of a master file that defines the measurement parameters to export and generates calculations and graphics based on the exported data.

How to Create Master Files

You can create your own (custom) Microsoft Excel files that define the data you wish to export. This can be used to filter your measurement data in the exported file.

In the export dialog, use the following settings:

l Destination file: C:\ProgramData\Bruel and Kjaer\Noise Partner\Master l Export file: Excel Workbook l Master file:EmptyMaster l Enable Launch Excel after export

2. Click OK.

In the Excel file:

l Delete the unwanted data columns (data columns correspond to measurement parameters) l Delete all rows except for the first row (the header row)

4. Use the Save as... option to name your new master file and save it to the same location as the other master files.

How to Create a Report Master File

Master files can also contain calculations and graphics for reporting.

1. Export data using EmptyMaster or a custom master file.

In the Excel file:

a. Add one or more sheets containing calculated data, tables and graphs.

b. Create links between the report sheets and the data sheets.

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Use the PC App: Export a Project

c. Use the Clear Contents option from the Edit menu to remove data but preserve the links to the empty

cells.

3. Use the Save as... option to name your new report master file and save it to the same location as the other master files.

✐ Note:

l Newly created master files will be available in the Master file drop-down menu of the Export dialog l When you export to your master file, it will contain only the sheets and parameters included in that master file l If a there is not measurement data for a parameter included in the master file, the column will be blank in the

exported file and reporting tools that reference the missing data will not work. Make sure the parameters included in the master file match the measured data

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TERMINOLOGY

Terminology: Export a Project

A-weighting

filter

B-weighting

filter

C-weighting

filter

Decibel (dB)

Exchange

Rate

Frequency weighting corresponding approximately to the 40dB equal loudness curve, that is to say, the human ear’s response at low to medium sound levels. It is by far the most commonly applied frequency weighting and is used for all levels of sound.

Frequency weighting corresponding approximately to the 70dB equal loudness curve, that is to say, the human ear’s response at medium sound levels.

Frequency weighting corresponding to the 100dB equal loudness curve, that is to say, the human ear’s response at fairly high sound levels. Mainly used when assessing peak values of high sound pressure levels.

The measurement unit for expressing the relative intensity of sound. A direct application of linear scales (in Pa) to the measurement of sound pressure leads to large and unwieldy numbers. As the ear responds logarithmically rather than linearly to stimuli, it is more practical to express acoustic parameters as a logarithmic ratio of the measured value to a reference value. This logarithmic ratio is called a decibel or dB. The advantage of using dB can be clearly seen in the below illustration. Here, the linear scale with its large numbers is converted into a manageable scale from 0 dB at the threshold of hearing (20μPa) to 130dB at the threshold of pain (~100Pa).

Our hearing covers a surprisingly wide range of sound pressures - a ratio of over a million to one. The dB scale makes the numbers manageable.

Exchange Rate is the increase in noise level that corresponds to a doubling of the noise level. The Exchange Rate is used for calculation of LavUQ, TWA, TWAv, DoseUQ and projDoseUQ, where U = F or S and Q = Exchange Rate: 4, 5 or 6dB.

✐ Note: LAeq is always based on an Exchange Rate = 3.

Fast Max

Fast Min

'F', 'S' or 'I'

time weight-

ing

Frequency

Maximum time-weighted acceleration, velocity, displacement or voltage level measured with Linear frequency weighting and Fast time weighting. It is the highest level occurring during the measurement time.

Minimum time-weighted acceleration, velocity, displacement or voltage level measured with Linear frequency weighting and Fast time weighting. It is the lowest level occurring during the measurement time.

A time weighting (sometimes called a 'time constant') defines how the exponential averaging in root-mean-square (RMS) measurement is done. It defines how heavily fluctuating sound pressure variations are smoothed or averaged to allow useful readings. The standards define three time weightings: F (Fast), S (Slow) and I (Impulse). Most measurements are carried out using the F time weighting, which uses a 125ms time constant.

The number of pressure variations per second. Frequency is measured in hertz (Hz). The normal

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Frequency

weighting

Terminology: Export a Project

hearing for a healthy young person ranges from approximately 20Hz to 20000Hz (20kHz).

Our hearing is less sensitive at very low and very high frequencies. In order to account for this, weighting filters can be applied when measuring sound. The most commonly used weighting is the 'A-weighting', which approximates the human ear’s response to low - medium noise levels. A 'Cweighting' curve is also used, particularly when evaluating very loud or low-frequency sounds.

LAE

LAeq

LAF

LAFmax

LAFmin

LA90.0

Sound Exposure Level - sometimes abbreviated SEL and sometimes called Single Event Level, is the Sound Exposure expressed as a level. The letter 'A' denotes that the A-weighting has been included.

A widely used noise parameter that calculates a constant level of noise with the same energy content as the varying acoustic noise signal being measured. The letter 'A' denotes that the A-weighting has been included and 'eq' indicates that an equivalent level has been calculated. Hence, LAeq is the A-weighted equivalent continuous noise level.

The instantaneous time-weighted sound level, Lp, is available at any time. 'A' denotes that the A-frequency weighting is used. 'F' denotes that the Fast time-weighting is used.

Maximum time-weighted sound level measured with A-frequency weighting and Fast time weighting. It is the highest level of environmental noise occurring during the measurement time. It is often used in conjunction with another noise parameter (for example LAeq) to ensure a single noise event does not exceed a limit.

Minimum time-weighted sound level measured with A-frequency weighting and Fast time weighting. It is the lowest level of environmental noise occurring during the measurement time (time resolution is 1s).

The noise level exceeded for 90% of the measurement period with A-frequency weighting. The level is based on statistical analysis of LAeq sampled at 1 s intervals into 0.2 dB wide classes. The percentage is user-definable.

LAF(SPL)

LCpeak

Linear

Weighting

Linear

The Sound pressure Level (maximum time-weighted sound level during the latest second) is available at any time. 'A' denotes that the A frequency weighting is used. ‘F’ denotes that the Fast timeweighting is used.

Maximum peak sound level during a measurement. ‘C’ denotes that the C frequency weighting is used. Used for assessing possible damages to human hearing caused by very high short-duration noise levels.

‘Linear’ frequency weighting is without any frequency weighting, that is, equivalent to LIN, Z or FLAT.

Time-averaged (RMS) weighted acceleration (or voltage) value, averaged over the entire measurement period with frequency weighting Linear.

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Loudness

Terminology: Export a Project

Loudness is the subjective judgement of intensity of a sound by humans. Loudness depends upon the sound pressure and frequency of the stimulus and whether the sound field is diffuse- or freefield. The unit is the Sone. The Zwicker method of calculation of stationary loudness based on 1/3octave measurements is described in ISO 532 - 1975, Method B.

Loudness

Level

Overload

Peak

Peak-peak

Slow Max

Slow Min

Sound

Loudness Level = 10*log2(Loudness) + 40. The unit is the phone.

When the broadband sound level is about the measuring range of the instrument. The light ring will flash red.

Maximum peak of the acceleration, velocity, displacement signal or voltage input with frequency weighting Linear.

The real peak-to-peak value (difference between the most positive value of the signal and the most negative value of the signal). Available for Displacement only.

Maximum time-weighted acceleration, velocity, displacement or voltage level measured with Linear frequency weighting and Slow time weighting. It is the highest level occurring during the measurement time.

Minimum time-weighted acceleration, velocity, displacement or voltage level measured with Linear frequency weighting and Slow time weighting. It is the lowest level occurring during the measurement time.

Any pressure variation that the human ear can detect. Just like dominoes, a wave motion is set off when an element sets the nearest particle of air into motion. This motion gradually spreads to adjacent air particles further away from the source. Depending on the medium, sound extends and affects a greater area (propagates) at different speeds. In air, sound propagates at a speed of approximately 340 m/s. In liquids and solids, the propagation velocity is greater - 1500 m/s in water and 5000 m/s in steel.

Sound level

or sound

pressure

level

TCpeak The time when the peak sound level occurred. ‘C’ denotes that the C frequency weighting is used.

Underrange

Z-weighting

The level in decibels of the pressure variation of a sound. See also decibel.

When the broadband sound level is below the measuring range of the instrument. Underrange is only indicated on the screen;no underrange information is saved with the final result of the measurement.

‘Zero’ frequency weighting is without any frequency weighting, that is, equivalent to Linear, LIN or FLAT.

B&K 2245 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

INTRODUCTION

Overview

Licences

About

About the Instrument

About the Mobile App

About the PC App

System Requirements

Data Storage

Service and Support

Contact Information

Additional Documentation

GET STARTED

Hardware Interface

Instrument GUI

How to Display the GUI in a Web Browser

Install the Apps

Download the Mobile App

Download the PC App

Local Connections

Join your Local Network

Use the Instrument as a Hotspot

Remote Connections

How to Connect Remotely via an IPv4 Address

How to Connect Remotely via an IPv6 Address

Connect the Mobile App to the Instrument

Connect the Mobile App to the Instrument

How to Add the Instrument Manually

How to Disconnect Devices

Troubleshooting Connection Problems

Mobile App GUI

Charge the Battery

Status

Power Consumption

SET UP THE INSTRUMENT

Regional Settings

How to Change Regional Settings

About the Settings

Input Settings

How to Set up the Input

About the Microphone

About Sound Fields

Measurement Control

How to Set up Measurement Controls

About Logging Mode

About Measurement Time

About Back-erase Mode

Measurement Parameters

How to Set up Broadband Parameters

Spectrum Parameters

Statistical Parameters

Audio Recording

How To Record Audio

Display Settings

How to Change Display Settings

About Screen Settings

About Light Ring Brightness

About Measurement Display Settings

About Data View

Voltage Output

Lock the Settings

CHECK THE CALIBRATION

How to Perform a Calibration Check

Calibration History

Calibration Settings

Automatic Calibration Check

Calibration Reminder

Custom Calibration

CREATE A PROJECT

How to Delete a Project

Add Past Measurements

Set up Markers

MEASUREMENTS

Make a Measurement

Data explorer