HBK B&K 2245 User Manual
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HBK B&K 2245 User Manual

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B&K 2245
with Noise Partner
User Guide
for Version 1.4
BN 2376–15
Copyright © Hottinger Brüel & Kjær A/S. All rights reserved.

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Summary of Contents for HBK B&K 2245

  • Page 1 B&K 2245 with Noise Partner User Guide for Version 1.4 BN 2376–15 Copyright © Hottinger Brüel & Kjær A/S. All rights reserved.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS OVERVIEW Licences About the instrument About the mobile app About the PC application System requirements Data storage Service and support Additional documentation THE INSTRUMENT Hardware interface Instrument GUI Web server display Charge the battery Fix an unresponsive instrument Drying the instrument DOWNLOAD THE APPS...
  • Page 4 Table of contents Regional settings Power management Data management Network settings Voltage output Lock the settings CALIBRATION CHECK How to perform a calibration check Calibration history Calibration settings MEASUREMENTS Data explorer Make a measurement using the mobile app Change the mobile app display Review measurements (mobile app) ANNOTATIONS How to make annotations...

  • Page 5: Overview

    OVERVIEW Your instrument works with applications: Noise Partner for general-purpose, basic sound level measurements Enviro Noise Partner for measuring and analysing sound levels in the world around us Work Noise Partner for determining sound exposure levels in the workplace Product Noise Partner for testing noise emission levels of products There is a mobile version and a PC version of each application.

  • Page 6: Licences

    Overview 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 This licence enables you to make simple, broadband measurements, to make general-purpose sound pressure level measurements, and to make basic occupational, product and environmental measurements.

  • Page 7: About The Instrument

    Overview BZ-7304: Exhaust Noise Partner This licence enables you to measure exhaust noise. Measure broadband parameters. Connect to Noise Partner mobile app and PC application. About the instrument The instrument measures sound level meter parameters (Leq, Lpeak, Lmax, Lmin, L(SPL), L) with up to two sim- ultaneous frequency weightings (A, B, C, Z) and up to three simultaneous time weightings (F, S, I) for the exponential averaging.

  • Page 8: About The Pc Application

    Overview ✐ Note: If you have additional licences installed (and enabled) on your instrument, Noise Partner is able to reflect cer- tain functionality of the other licences. However, the help for Noise Partner only includes information for licence BZ- 7300 (Noise Partner). About the PC application Functionality of the PC version of Noise Partner: View measurements and annotations.

  • Page 9: Data Storage

    Overview 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 meas- urement 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.

  • Page 10: Additional Documentation

    Overview ✐ Note: When you return your instrument for service, the firmware will be updated to the latest version. For type-approved firmware versions, you may need to return the instrument to a certified service centre to update the firmware. Check with your type-approving authority before updating the firmware. Application updates  Updates are handled via the application.
  • Page 11 Overview Manuals and guides Getting Started Guide: BR 1812 Instruction Manual for B&K 2245 with Microphone Type 4966: BE 1910 Phone / Tripod Holder UA-2237 Guide: BR 8071 Windscreen UA-1650 Guide: BR 0011 Help Help for B&K 2245 with Noise Partner is also available in HTML format.

  • Page 12: The Instrument

    THE INSTRUMENT Hardware interface The microphone is at the top of the instrument. is the power/menu/reboot button. Press and hold the button to power the instrument on or off. When the instrument is on, press the but- ton briefly to open the menu. If the instrument becomes unresponsive, press and hold the button for approximately 40 seconds (remove cables first).
  • Page 13 The instrument 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.

  • Page 14: Instrument Gui

    The instrument 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.
  • Page 15 The instrument 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 the clock is controlled from a network time protocol (NTP) server on the Internet.
  • Page 16 The instrument 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.
  • Page 17 The instrument ✐ 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. Go to Menu > Display settings > SLM view > Graph parameter to set the parameter for the bar graph when dis- playing one broadband parameter.

  • Page 18: Web Server Display

    The instrument 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;...

  • Page 19: Charge The Battery

    The instrument Charge the battery The instrument has an internal Lithium-ion rechargeable battery. Procedure 1. Connect the instrument to a power source. indicates that the battery is charging with a readout of the percentage charged. 2. Disconnect the power source to stop charging. Approved power sources Mains Base station (the base station is powered via mains)

  • Page 20: Fix An Unresponsive Instrument

    The instrument 3. Select Enabled. 4. Go to: Calibrate battery. Follow the prompts to calibrate your battery. Fix an unresponsive instrument If your instrument freezes, try rebooting the instrument. 1. Remove all external connections, including the charger. 2. Press and hold until the instrument reboots.
  • Page 21 The instrument Where can water get in? It is possible for water to enter the space between the microphone cartridge and the microphone preamplifier when, for example, the instrument is exposed to heavy rain. Also, water may enter the instrument body if, for example, the instrument is submerged in water.

  • Page 22: Download The Apps

    DOWNLOAD THE APPS Download the mobile app You will need: iOS-based phone or tablet See supported iOS versions for current app version in the App Store®, under Noise Partner > Information > Compatibility. Procedure: 1. Go to the App Store. 2.
  • Page 23 Download the apps 5. Click Install Noise Partner Software to start the download. 6. Once the download is complete, double-click the file (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.

  • Page 24: Connect Devices

    CONNECT DEVICES Communication between the instrument and the devices running the applications is an essential part of using the instru- ment. Once you understand the ways in which the devices can communicate, you will be able to change connections to suit your circumstances.

  • Page 25: Remote Connections

    Connect devices e. Select the network you wish to join. f. Enter the password at the prompt. to scroll through the character menu. 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.
  • Page 26 Connect devices 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.
  • Page 27 Connect devices 3. 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. b.

  • Page 28: Connect The Mobile App To The Instrument

    Connect devices Connect the mobile app to the instrument The mobile app connects to the instrument via Wi-Fi® and Bluetooth®. What you will need: The instrument An iOS-based mobile device (phone or tablet) with the mobile app installed ✐ Note: You will need to enable Wi-Fi and Bluetooth on your mobile device. How to connect You can connect the mobile app to one instrument at a time.
  • Page 29 Connect devices 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. ✐...
  • Page 30 Connect devices Mobile app GUI ✐ Note: Make sure that your mobile device is set to display the same language as the instrument, otherwise text in the graphical user interface (GUI) of the mobile app will be in two languages. to view a list of the measurements stored on the instrument.
  • Page 31 Connect devices Tap for information about the instrument and to access the instrument menu. You can edit many of the instrument settings using the mobile app. The icon also gives status information. means there is no connection between the instrument and the mobile app. means that the wireless signal is weak.
  • Page 32 Connect devices Total displays instantaneous parameters and parameters that are cal- culated for the total measurement time. 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 (right) shows an instantaneous broadband parameter (bar graph) and a list of calculated broadband parameters.
  • Page 33 Connect devices During a measurement, the mobile app shows the measurement start time ( ) and the measurement duration time ( ). to reset the instrument for the next measurement. to open the annotation menu. to start a measurement. During a measurement, slide to the right to stop or slide to the left to pause.

  • Page 34: Configure Your Instrument

    CONFIGURE YOUR INSTRUMENT You can edit instrument settings using the instrument or using the mobile app. The functionality of the mobile app enhances the usability of the instrument. For example, it is easier to use the keypad on your mobile device to enter passwords than it is to scroll through characters on the instrument. It is recommended to use the mobile app to set up the instrument wherever possible.
  • Page 35 Configure your instrument Microphone Use this setting to tell the instrument which microphone is attached. The instrument is designed for use with Microphone Cartridge Type 4966. Type 4966 is prepolarized, so it can be used with battery-operated equipment such as B&K 2245, and is optimized for use in free-field environments. By default, the instrument is set up to use the attached Type 4966 microphone cartridge.

  • Page 36: Measurement Control

    Configure your instrument Sound field It is important that the instrument knows the type of sound field in which you are measuring so it can apply the appro- priate correction to your measurements. These 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.
  • Page 37 Configure your instrument Measurement time This setting controls how the measurement stops: automatically or manually. Preset: The instrument will measure for the time specified in Preset time, then stop and save automatically. Free: You control the measurement manually. Preset time This setting controls the amount of time for which the instrument will measure when Measurement time is set to Pre- set.

  • Page 38: Broadband Parameters

    Configure your instrument Enabled: Overwrite measurement data for the Back-erase time. Disabled: Resume the measurement without overwriting earlier data. Back-erase time This setting controls the number of seconds that will be erased when the measurement is resumed. This setting is enabled when Back-erase mode is set to Enabled.
  • Page 39 Configure your instrument How to set up broadband parameters using the instrument 1. Enable a frequency weighting. a. Press to navigate to a weighting box. b. Press to scroll through the frequency weightings. 2. Enable measurement parameters. a. Press to navigate to a parameter. b.
  • Page 40 Configure your instrument How to set up broadband parameters using the mobile app 1. Tap 1 to enable parameters for the first frequency weighting. The instrument measures broadband parameters with up to two frequency weightings simultaneously, you will enable parameters for each frequency weighting separately. 2.
  • Page 41 Configure your instrument Exponentially averaged levels Exponentially averaged sound levels provide easy-to-read values. A number of parameters are derived from expo- nential 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.
  • Page 42 Configure your instrument About frequency weightings Frequency weightings mimic how humans hear sound. A-weighting Represents the human ear’s response at low to medium sound levels Equal loudness curve: 40 dB The most commonly applied frequency weighting Can be used for all sound levels B-weighting Represents the human ear’s response at medium sound levels Equal loudness curve: 70 dB...

  • Page 43: Display Settings

    Configure your instrument 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. LAeq LBeq LCeq LZeq Lpeak LApeak LBpeak LCpeak LZpeak LFmax LAFmax...
  • Page 44 Configure your instrument 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. Colour scheme This setting controls the colour of the screen and text. Light is a light background with dark text. Dark is a dark background with light text.

  • Page 45: Regional Settings

    Configure your instrument Parameter 1, 2 and 3 (List view) Choose the 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.

  • Page 46: Power Management

    Configure your instrument 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 separator: decimal comma or decimal point. Decimal places Choose the number of decimal places to display: 1 or 2.

  • Page 47: Data Management

    Configure your instrument Data management Data management settings include settings for storing a backup and for data retention. Go to: System settings > Data management. Backup settings 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).

  • Page 48: Network Settings

    Configure your instrument Data retention Data retention is set to Manual by default. This means that you will need to manually move data to Trash. To set the instrument to remove data automatically: 1. Set Data retention to Automatic. 2. Use the Retention period setting to specify how long to keep the data. After the specified time, data will be moved to Trash.
  • Page 49 Configure your instrument Use a naming pattern such as the phonetic alphabet. Use the location of the instrument. Password This setting allows you to password protect your instrument. The password will be required to connect to the instru- ment through Wi-Fi or Ethernet. You can add or change the password using either the instrument or the mobile app.
  • Page 50 Configure your instrument Wi-Fi mode: Connect to network Use this setting to connect your instrument to your local wireless network, such as your work or home network. The instrument will be able to communicate with the other devices on the network, that is your iOS device or PC. 1.

  • Page 51: Voltage Output

    Configure your instrument How to reset network settings 1. Select Reset network settings. 2. Select Yes. Voltage output This setting allows you to output an anologue signal. The USB-C™ socket on the bottom of the instrument is also an out- put channel.

  • Page 52: Calibration Check

    CALIBRATION CHECK It is a best practice to check the accuracy of your instrument before and after a measurement by performing a cal- ibration check. A calibration check is not a calibration. Calibration includes an adjustment of the instrument's sensitivity. A calibration check compares the current sensitivity of the instrument with the sensitivity from its initial calibration, checking that it has not changed too much.
  • Page 53 Calibration check 2. Gently seat the calibrator on the microphone. 3. Turn on the sound calibrator. 4. After a short period the instrument will initiate a calibration check, choose Yes. 5. The calibration check will have one of two results: Pass: The measured sound level is within tolerance.

  • Page 54: Calibration History

    Calibration check 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. Automatic calibration check The instrument is set to perform a calibration check automatically by default. To change this setting, set Automatic check to Disabled.

  • Page 55: Measurements

    MEASUREMENTS The exact steps of a measurement will vary depending on the settings you use in Measurement control. A basic overview is as follows: 1. Press to start a measurement. 2. If necessary, press to pause. 3. Press to resume. 4.

  • Page 56: Data Explorer

    Measurements 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. 2. Press 3. Choose Open to view the measurement on the instrument. ✐...

  • Page 57: Change The Mobile App Display

    Measurements Change the mobile app display You can change the display of the mobile app before or during a measurement, or while reviewing a completed meas- urement. ✐ Note: Changes in the mobile app display will not change the instrument settings. Swipe left or right to switch between views Tap on any parameter to change the parameter being displayed Touch and hold...

  • Page 58: Review Measurements (Mobile App)

    Measurements Review measurements (mobile app) After you stop a measurement, the measurement stays open to review. You can switch between SLM view and List view, change the parameters being displayed and add annotations to the measurement. to share the measurement. The measurement is encrypted, uploaded to the Brüel & Kjær cloud and an email with a download link is generated.

  • Page 59: Annotations

    ANNOTATIONS Use the mobile app to annotate your measurement. Annotations are comments you can attach to a measurement. There are four types of annotations: photo, video, note, and commentary. Every measurement can have multiple annotations of different types. It is always a good idea to add annotations to your measurements. For example, they can help you and your colleagues identify measurements at a later date and provide valuable information about the context of a measurement.

  • Page 60: How To Attach Unattached Annotations

    Annotations 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 application. How to attach unattached annotations To attach an annotation to a measurement, a measurement must be open or in progress. 1.

  • Page 61: Post-Process Using The Pc App

    POST-PROCESS USING THE PC APP PC application GUI The application tab opens / closes the application 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.
  • Page 62 Post-process Using the PC App These are the tools that control the operation of the application. : 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.
  • Page 63 Post-process Using the PC App When you open a project or import data, you will see the individual measurements in the project browser window. Select measurements to view them. Project Name: Unnamed projects appear as Untitled in the toolbar. : Select all measurements in the project browser.
  • Page 64 Post-process Using the PC App Unattached Annotations displays annotations that are not linked to a measurement. 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.
  • Page 65 Post-process Using the PC App These tabs are for switching between the Measurement, Gallery and Map windows. Within the Measurement window, there are two areas. The upper section is an overview of the selected meas- urements in a project. It will help keep you oriented while you investigate the graph and table views in the section below.

  • Page 66: Create A Project Using The Pc Application

    Post-process Using the PC App In this panel, you will find collapsible windows for viewing annotations. Map: View locations of annotations and measurements on a map. Notes: Read the notes attached to the measurement. Gallery: View photos and videos attached to the measurement. Commentaries: Listen to voice memos attached to the measurement.

  • Page 67: Import Measurements

    Post-process Using the PC App Import measurements Import measurements to add them to a project. You can add measurements to empty projects or to projects that already contain measurements. You will need: A project open in the PC application One or more measurements How to import measurements 1.
  • Page 68 Post-process Using the PC App 4. Select the data you want to transfer. Hint: Use <Ctrl> or <Shift> to select multiple measurements or annotations. 5. Click Import. Import from a backup The first time you import from a backup, you will need to tell the PC application where the backup is stored. You will need: An instrument that is set up to store a backup of its data Data management on page 47...

  • Page 69: View Measurements

    Post-process Using the PC App ✐ 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 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.
  • Page 70 Post-process Using the PC App Parameters are colour coded: Leq = blue Lmax = red Lmin = green Lpeak = purple Frequency weightings are style coded: A = solid line C = dotted line Z = bold line B = dashed line Read levels Click on a graph to place a cursor.

  • Page 71: Review Annotations In The Pc Application

    Post-process Using the PC App Measurement table 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.
  • Page 72 Post-process Using the PC App Right-click on the image to open the context sensitive menu with options to cut, copy or paste. Click on the video to play it. 3. In the side panel, click on Gallery to expand the window. ✐...

  • Page 73: View Locations

    Post-process Using the PC App How to attach or detach annotations Sometimes you need to move an annotation. In the PC application, 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.

  • Page 74: Export A Project

    Post-process Using the PC App ✐ Note: You will be able to view the GPS coordinates on the instrument if About data view is enabled. See About data view for more information. How to add location data to annotations Annotations use the functionality of the mobile device on which the app is running, for example, its camera is used to take photos and record video.
  • Page 75 Post-process Using the PC App ✐ Note: File extension *.xls is compatible with Microsoft Excel 2003 and earlier. File extension *.xlsx is compatible with Microsoft Excel 2007 and newer. 6. Enable or disable: Launch Excel after export: Open the exported Excel file. Open in file explorer: Open the location of the exported file in the file explorer.
  • Page 76 Post-process Using the PC App 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. 1.

  • Page 77: Terminology

    TERMINOLOGY Frequency weighting corresponding approximately to the 40 dB equal loudness curve, that A-weighting filter is to say, the human ear’s response at low to medium sound levels. It is by far the most com- monly applied frequency weighting and is used for all levels of sound. Frequency weighting corresponding approximately to the 70 dB equal loudness curve, that B-weighting filter is to say, the human ear’s response at medium sound levels.
  • Page 78 Terminology The number of pressure variations per second. Frequency is measured in hertz (Hz). The Frequency normal 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.
  • Page 79 Terminology Time-averaged (RMS) weighted acceleration (or voltage) value, averaged over the entire Linear measurement period with frequency weighting Linear. 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 dif- Loudness fuse- or free-field.

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