Technical Documentation Hand-held Analyzer Types 2250 and 2270 With Sound Level Meter Software BZ-7222, Frequency Analysis Software BZ-7223, Logging Software BZ-7224, Enhanced Logging Software BZ-7225, Signal Recording Option BZ-7226, Reverberation Time Software BZ-7227, 2-channel Option BZ-7229 Tone Assessment Option BZ-7231 and Low Frequency Option BZ-7234 HEADQUARTERS: Brüel & Kjær Sound & Vibration Measurement A/S · DK-2850 Nærum · Denmark Telephone: +45 7741 2000 · Fax: +45 4580 1405 · www.bksv.
Hand-held Analyzer Types 2250 and 2270 with Sound Level Meter Software BZ-7222, Frequency Analysis Software BZ-7223, Logging Software BZ-7224, Enhanced Logging Software BZ-7225, Signal Recording Option BZ-7226, Reverberation Time Software BZ-7227, 2-channel Option BZ-7229, Tone Assessment Option BZ-7231 and Low Frequency Option BZ-7234 User Manual Valid for all hardware versions and from software version 4.
Safety Considerations This apparatus has been designed and tested in accordance with EN/IEC 61010 – 1 and ANSI/UL 61010 – 1 Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use. This manual contains information and warnings which must be followed to ensure safe operation and to retain the apparatus in safe condition.
Table of Contents CHAPTER 1 Introduction......................................................................................................... 1 1.1 1.2 Welcome .............................................................................................................. How to Use this Manual ....................................................................................... Conventions Used in this Manual ........................................................................ Beginners..........
CHAPTER 4 Getting to Know Your Analyzer....................................................................... 31 4.1 4.2 4.3 4.4 What is a Sound Level Meter?........................................................................... What is the Hand-held Analyzer? ...................................................................... Sound Level Meter Software Module BZ-7222 .................................................. Frequency Analysis Software Module BZ-7223.....................................
CHAPTER 6 Data Management............................................................................................. 61 6.1 6.2 6.3 Organising Measurements................................................................................. Description of Jobs and Projects ....................................................................... Navigating in Jobs.............................................................................................. Selecting Default Measurement Job/Path..............
CHAPTER 9 Updating and Upgrading Applications,Maintenance, Calibration and Troubleshooting........................................................................................ 97 9.1 9.2 9.3 9.4 9.5 9.6 How to Install New Applications......................................................................... 97 How to Update/Upgrade Applications and Install New Languages.................... 97 Update/Upgrade using BZ-5503 ........................................................................
11.3 11.4 Displaying the Results ..................................................................................... The Profile View............................................................................................... Marking Sound Categories .............................................................................. Editing Markers on Profiles .............................................................................. Annotate Sound Categories...........................................
14.3 14.4 14.5 14.6 Displaying the Results ..................................................................................... Overview .......................................................................................................... Spectrum.......................................................................................................... Decay...............................................................................................................
CHAPTER 17 Low Frequency Option BZ-7234.................................................................... 189 17.1 17.2 17.3 17.4 17.5 Sound Measurements and G-weighting........................................................... Setting up the Analyzer for G-weighting .......................................................... Controlling the Measurement........................................................................... Displaying the Results ....................................................
B.3 B.4 B.5 B.6 B.7 Logged Measurement (Microphone Input)....................................................... For Logging Software BZ-7224 and Enhanced Logging Software BZ-7225.... Logged (100 ms) Measurement (Microphone Input)........................................ For Logging Software BZ-7224 and Enhanced Logging Software BZ-7225 ............................................................................................ Instantaneous Measured Parameters (available at any time; Microphone Input) .
1 Chapter 1 Introduction 1.
Hand-held Analyzer Types 2250 and 2270 – User Manual 2 Icons, Buttons and Tabs Used on the Screen Indicated by bold type face (for example, tap the Main Menu icon). Parameter Text Appearing on the Screen Parameters, instructions and descriptions appearing on the screen are indicated by italics (for example, Measurement Mode). Path Denotations Indicated by capitals (for example, SETUP\BZ7222\). Menu/Screen Navigation Indicated by italics (for example, Setup > Frequency Settings > BB Peak). 1.2.
3 Chapter 2 Assembling your Analyzer This chapter describes how to assemble and set up your analyzer. It provides a brief description and an associated diagram showing the analyzer components and the various input and output connections. This enables you to start getting familiar with the analyzer, while assembling your system. This is followed by an overview of the hardware components, showing all the main configurations of the analyzer and its accessories.
Hand-held Analyzer Types 2250 and 2270 – User Manual 4 2.2 Analyzer Components An overview of the main analyzer components is provided in Fig.2.1 and the text below. Fig.2.
CHAPTER 2 Assembling your Analyzer 5 1) Measurement Microphone: A Brüel & Kjær Prepolarized Free-field ½ Microphone is used. A robust and reliable microphone with a wide frequency range. 2) Preamplifier: Used to convert the high-impedance output of the microphone to low impedance, suitable for driving long extension cables. The arrow points to the preamplifier’s built-in windscreen sensor 3) (Manual Event Pushbutton): This allows you to manually indicate events during a measurement.
6 Hand-held Analyzer Types 2250 and 2270 – User Manual 16) Secondary Microphone: This is used to add recorded comments to measurements and is positioned on the underside of the analyzer. 17) Top Socket: This is the main microphone input socket for the analyzer. The measurement microphone and preamplifier (items 1 and 2 respectively) are normally connected directly to this socket. For more details see section 2.3.
CHAPTER 2 Assembling your Analyzer 2.3 7 Analyzer Inputs/Outputs Hardware Versions 1 – 3: Fig.2.2 Connector panel of Type 2270 with hardware versions 1 – 3 8 1 2 3 12 4 9 11 5 10 6 7 1) Mini USB Interface Socket: Use the supplied Mini USB Cable AO-1476 to connect.
Hand-held Analyzer Types 2250 and 2270 – User Manual 8 8) Reset Button: Press to reset the analyzer if you have problems 9) Compact Flash Card Slot: Insert a CF memory card to save data or connect a modem (either a compact flash modem or using an CF to Serial converter) 10) Secure Digital Card Slot: Insert a SD or SDHC memory card to save data 11) (Type 2270 only) Input Ch.1 Socket: A triaxial LEMO connector – depending on the transducer used, a number of cables are available for connection.
CHAPTER 2 Assembling your Analyzer 9 5) Input Socket (or for Type 2270 only: Input Ch.2 Socket): A triaxial LEMO connector –depending on the transducer used, a number of cables are available for connection. See section 2.3.1 for more information 6) External Power Socket: Use Mains Power Supply ZG-0426 to connect and charge batteries 7) Battery Charge Indicator: An LED that indicates when the battery pack is being charged from external power. See section 2.3.
10 Hand-held Analyzer Types 2250 and 2270 – User Manual Connect to a Printer via USB For hardware versions 1 – 3, use the supplied Adaptor AO-0657 to connect to a printer that supports PCL language via the USB socket. For hardware version 4 (G4), use the standard USB Type A socket (see item 13 in Fig.2.3) on the analyzer to connect to printers or other external USB devices. See section 8.1.7 for more information printer setup. Earphone Socket See item 2 in Fig. 2.2 (hardware versions 1 – 3) or Fig.2.
CHAPTER 2 Assembling your Analyzer 11 Input 1 or Rear Socket Channel 1 (Type 2270 only) See item 11 in Fig. 2.2 (hardware versions 1 – 3) or Fig.2.3 (hardware version 4). This triaxial LEMO connector is used for AC or CCLD inputs to Channel 1. It can be used when analysing electrical signals, from (for example) transducers or signal recordings. Use one of the following cables: • AO-0440-D-015: LEMO to BNC plug, 1.5 m • AO-0727-D-010: LEMO to BNC jack, 1.
12 Hand-held Analyzer Types 2250 and 2270 – User Manual Reset Button See item 8 in Fig. 2.2 (hardware versions 1 – 3) or Fig.2.3 (hardware version 4). Located above the USB connector, it is used to reset the analyzer if you have problems with the analyzer and cannot get it to operate. To reset, press the button with the point of the stylus – see chapter 9 for troubleshooting. Slot for Compact Flash (CF) Cards (Hardware version 1 – 3 only) See item 9 in Fig. 2.2.
CHAPTER 2 Assembling your Analyzer 2.4 Hardware Setup Fig.2.4 Type 2250/2270 – Hardware Overview UA-1404 Outdoor Microphone Kit UA -1650 90 mm Windscreen with AutoDetect 4231 Sound Calibrator 4189/4190 Microphone ZC -0032 Microphone Preamplifier AO -0697-D-100 Microphone Ext. Cable, 10 m JP-1041 Dual 10-pole Adaptor AO -0697-D-030 Microphone Ext.
Hand-held Analyzer Types 2250 and 2270 – User Manual 14 2.5 Assembling the Analyzer 2.5.1 Charging the Battery for the First Time Battery Pack QB-0061 comes charged to approximately half capacity on initial delivery. Before assembling your analyzer for the first time, it is recommended that you fully charge the battery pack, by connecting Mains Power Supply ZG-0426 to the external power socket. It should take approximately 8 – 10 hours.
CHAPTER 2 Assembling your Analyzer 15 Mounting the Measurement Microphone Before mounting the measurement microphone, note the following precautions: • When screwing the microphone on, do it gently to avoid damaging threads • Keep dust and foreign matter off the microphone diaphragm.
Hand-held Analyzer Types 2250 and 2270 – User Manual 16 2.5.3 Alternative Measurement Method (Extended Microphone) The measurement microphone can be placed a distance from the analyzer by connecting an extension cable and fitting the microphone to a microphone holder or to Outdoor Microphone Kit UA-1404. The analyzer should be set up using the following assembly instructions. This is to ensure that the accessories have limited acoustical influence on the analyzer during measurement.
CHAPTER 2 Assembling your Analyzer 17 4) Insert the male plug of the dual 10-pole adaptor into the top socket of Type 2270 (see item 17 in Fig.2.1) and push gently until it snaps into position. Mounting the Measurement Microphone on the Microphone Holder and Tripod Mount the microphone and preamplifier combination onto Microphone Holder UA-1317 and Small Tripod UA-0801, as follows: 1) Set Small Tripod UA-0801 in the required position, and adjust to the required height.
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19 Chapter 3 Making your First Measurement 3.1 Introduction This chapter describes how to make a basic measurement and how to save and document the results. It assumes you have just received your analyzer and are turning it on for the first time. If the analyzer has been used before, and the previous user has initiated the multi-user facility, then the screens that are displayed may not follow the sequence described below. If this is the case, please refer to section 8.1.6.
Hand-held Analyzer Types 2250 and 2270 – User Manual 20 7) Add any spoken comments to the measurements by pressing the Commentary pushbutton, and add any written comments by tapping the Main Menu icon and selecting Add Note to Current Measurement from the drop-down that appears. 8) To view and organise your data, tap the Main Menu icon and select Explorer.
CHAPTER 3 Making your First Measurement 3.3.2 21 Switching On Switch the analyzer on by pressing . The start-up time depends on the state the analyzer was in when last switched off and it may take up to 2 minutes from a cold start, or up to 10 seconds if the analyzer is already in Standby mode, (that is, from a warm start). Note: A cold start is a re-boot of the analyzer from ROM.
22 Hand-held Analyzer Types 2250 and 2270 – User Manual Fig.3.2 Changing the project template 2) Tap Measurement Mode in the View Area and set to Manual (Fig.3.3). Note: The bar graph showing the sound pressure level LAF is now live, but parameters such as LAeq are not. This is because LAF is an instantaneous value, always available for display, whereas LAeq is a measured value that needs to be averaged over a period of time.
CHAPTER 3 Making your First Measurement 23 The indications should be as follows: • Yellow status indicator flashing every 5 s before starting the measurement • Steady green status indicator after pressing the Start/Pause pushbutton the measurement (if everything is OK) • Short green flash every second means the measurement is waiting for the trigger • Yellow status indicator flashing every 5 s when you have stopped, saved the measurement and are ready to do another measurement • Yellow status ind
24 Hand-held Analyzer Types 2250 and 2270 – User Manual 6) Set Measurement Mode to Automatic and choose a preset time for your measurement. Then repeat steps 3 and 4. The measurement will automatically pause after the preset time. This allows you to either save your measurement or continue measuring, as required. 7) Tap the Main Menu icon and select Setup from the list of options (Fig.3.5). Fig.3.
CHAPTER 3 Making your First Measurement 3.4 25 Save your Measurement When you have completed your measurement, you need to save it. By default the analyzer creates a job folder called JOB 01. Job folders represent the upper level of the data (or file) management system, with individual measurements or sets of data, represented by projects appearing under the relevant job. By default the analyzer also creates a project called PROJECT 001 under JOB 01.
Hand-held Analyzer Types 2250 and 2270 – User Manual 26 3.4.1 Viewing the Saved Measurement To view the saved measurement, tap the project name or the Main Menu icon and select Explorer from the list of options. Tap the name of your measurement (PROJECT 001 in this case) and select Open from the drop-down that appears (Fig.3.8). Alternatively, you simply tap the measurement icon to the left of the name to open and view. Fig.3.8 Viewing your measurement in Explorer 3.
CHAPTER 3 Making your First Measurement 27 Metadata are text or numbers, which are easily set and changed using the keyboard or selected from a user-defined picklist. The metadata are stored together with the measurement on the project. Refer to section 8.7 for a more comprehensive description of using metadata. Tap the icon to close the Annotations screen. Another method for documenting your measurement is by attaching a short spoken comment to the project you are working on.
28 Hand-held Analyzer Types 2250 and 2270 – User Manual If a GPS receiver is connected (via USB) when you press the Save pushbutton, then the GPS note is automatically created with the position. Remove the GPS receiver after usage to save power. Fig.3.11 Example of a GPS note If you do not have a GPS receiver, but know the position (for example, from your smartphone), you can manually key in the position in the GPS note. A GPS note starts with “Position:”, and includes the latitude and longitude.
CHAPTER 3 Making your First Measurement 29 camera has fixed focus and automatically adjusts the light sensitivity; you just have to position the analyzer so that the object you want to capture is visible in the viewfinder and then press the Manual Event pushbutton or tap the icon to capture the image – see Fig.3.12. Fig.3.
Hand-held Analyzer Types 2250 and 2270 – User Manual 30 To get more familiar with this process, try the following: 1) Make a new measurement (see section 3.2, if unsure). 2) Tap the Annotations icon and define or select metadata. 3) Make a short written comment and attach it to the new measurement (as previously described). 4) Make a short spoken comment (as previously described). 5) Make an image (as previously described – for Type 2270 only).
31 Chapter 4 Getting to Know Your Analyzer 4.1 What is a Sound Level Meter? A Sound Level Meter (SLM) is an instrument that is designed to measure sound levels in a standardised way. An SLM comprises a microphone, a preamplifier, a main processor and a readout unit. The microphone converts the sound signal into an equivalent electric signal.
Hand-held Analyzer Types 2250 and 2270 – User Manual 32 fluctuating sound pressure level. It is a measure of the averaged energy in a varying sound level. It is not a direct measure of annoyance, though extensive research has shown that Leq correlates well with annoyance. Leq is measured directly with any SLM. If an A-weighting filter is used, it is expressed as LAeq: the measurement of the equivalent continuous sound level using the A-weighted filter network.
CHAPTER 4 Getting to Know Your Analyzer 33 Instantaneous Measured Parameters • Instantaneous Time-weighted Sound Levels (Lp – example: LAF) • Sound Pressure Levels (max levels once per second – example: LAF(SPL) • Instantaneous Peak Sound Levels (example: LCpeak,1s) • Instantaneous Weather data (requires a weather station connected) • Instantaneous GPS data (requires a GPS device connected) If you measure the acceleration signal from an Accelerometer, then the most common used parameters are: Ti
Hand-held Analyzer Types 2250 and 2270 – User Manual 34 4.2.3 Logging Software Module BZ-7224 This software module allows logging of broadband and spectral data* to obtain a time history for later analysis, for example, for use in environmental noise as well as workplace noise assessment. It allows free selection of up to 10 parameters to log at periods from 1 s to 24 h. Results are logged directly to the SD memory card (or CF card if using hardware versions 1 – 3). 4.2.
CHAPTER 4 Getting to Know Your Analyzer 4.2.8 35 Tone Assessment Option BZ-7231 This option allows the assessment of tones on site, according to selected methods. The option described in this manual is based on the 1/3-octave method. (Please refer to User Manual BE 1778 for detailed information about tone assessment based on FFT spectra.
Hand-held Analyzer Types 2250 and 2270 – User Manual 36 4.3 What is Measurement Partner Suite BZ-5503? Measurement Partner Suite BZ-5503 comes standard with your hand-held analyzer and provides data archive, preview and export capabilities as well as software maintenance and remote online display. In addition to the included standard configuration, valuable data analysis and post-processing functionality is available in an expanding suite of optional application modules.
CHAPTER 4 Getting to Know Your Analyzer Fig.4.1 37 The ‘Star’ navigation concept Shortcut This configuration gives you immediate access to screens you need most, that is, those you will need to perform, save and document your measurements.
38 Hand-held Analyzer Types 2250 and 2270 – User Manual In addition, Main Menu • Lock Keys and Screen • Log Off also allows you to perform the following actions: Explorer The Explorer screen is accessed from the Main Menu or by tapping the project name and gives you access to the analyzer’s Data/Project Manager. This allows you to view the overall project structure, including job folders and projects, and to view all the individual measurements.
CHAPTER 4 Getting to Know Your Analyzer 39 transducers or entered for new ones, see section 4.4.6. When you have finished viewing or updating the details, tap to return to the Measurement screen. When a transducer is selected, you can tap the Calibration History link at the bottom of the transducer details and open the Calibration History screen (Fig.4.1). This screen includes the calibration history for the transducer (that is, microphone) that is currently selected.
Hand-held Analyzer Types 2250 and 2270 – User Manual 40 4.4.2 The Display Screen During normal operation, you will use the Display screen to view your measurements and carry out a variety of functions, which are described in the following sections. CAUTION: The touch-sensitive screen is susceptible to damage from sharp objects, such as pencils, fingernails, etc. We, therefore, recommend you use the stylus provided to activate items on screen. See also section 4.4.5. A typical screen is shown in Fig.4.2.
CHAPTER 4 41 Getting to Know Your Analyzer First Line: • Path and name of the current project (see section 6.1.1). Tap it to open the Explorer. To change the path, navigate to the desired job (path) and tap the icon to save this path as the default measurement path. As in the project template, an ‘*’ will appear next to the project name to indicate that the project has not been saved. Press the Save pushbutton if you want to save the measurement or changed settings.
Hand-held Analyzer Types 2250 and 2270 – User Manual 42 want the screen changes to be saved in the current template, tap the Project Template Bar at the top of the screen to open the Template Explorer and tap the Save icon . Note: If you make changes to the screen that you do not want to keep (and you have not yet saved the template), you can undo them by selecting the template again from the Project Template Bar at the top of the screen.
CHAPTER 4 Getting to Know Your Analyzer 43 Save Pushbutton Use the Save pushbutton to save the measurement data together with the current project template (including all the screen settings and setup information) and the calibration documentation. Pressing Save will affect the pause and running states. In both cases the measurement state will displayed).
Hand-held Analyzer Types 2250 and 2270 – User Manual 44 4.4.5 Use of Stylus and Navigation Pushbuttons The stylus and navigation pushbuttons are used for setting up the analyzer, navigating through the screens and managing the results. A number of items that appear on the screen (parameter values or icons) can be selected, updated and activated. For instance, a new parameter value can be selected from a drop-down list.
CHAPTER 4 Getting to Know Your Analyzer 45 Stylus Usage Tap the value you want in the drop-down, or tap outside the list to cancel the selection. Pushbutton Usage Use the Navigation pushbuttons (Up Arrow , or Down Arrow ) to select the value you want and press the Accept pushbutton to activate it. Use the Left Arrow to cancel the selection. Number Keyboard When activating a number, a number keyboard appears (Fig.4.4). Fig.4.
Hand-held Analyzer Types 2250 and 2270 – User Manual 46 Fig.4.5 Character keyboard The character keyboard has all the functionality of a normal keyboard, enter text as required by to accept the changes, or tap outside the tapping the individual keys with the stylus. Tap keyboard to cancel. 4.4.7 How to Personalise your Setup Setup contains all the settings for the measurement and some settings for post-processing. Select Setup from the Main Menu , and the Setup screen appears (Fig.4.6). Fig.4.
CHAPTER 4 Getting to Know Your Analyzer 47 This mode allows you to copy parameters from the Full view to the Quick view simply by tapping on the parameters in the Full view – and to remove parameters from the Quick view by tapping on the parameters in the Quick view. When you have finished, tap the Edit icon again to exit Edit Mode. Setup settings can be protected from accidental changes by tapping the Padlock icon top of the screen. This will also protect the template from being deleted or renamed.
48 Hand-held Analyzer Types 2250 and 2270 – User Manual You can save changes to the project template, create new templates, rename templates or delete templates from the Template Explorer screen. Select Template Explorer by tapping on the Project Template Bar at the top of the screen or from the Main Menu , and the screen shown in Fig.4.8 will appear. Fig.4.8 Template Explorer The topmost line in the Status Field (“Sound Level Meter” in Fig.4.8) contains the name of the current template.
CHAPTER 4 Getting to Know Your Analyzer 49 The Full tab at the bottom of the screen allows you to view the complete list of project templates, while the Quick tab allows you to access the more frequently used project templates. Press the Edit icon on top of the screen to enter Edit Mode.
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51 Chapter 5 Calibration 5.1 Introduction Calibration is an adjustment of your analyzer to measure and display correct values. The sensitivity of the transducer as well as the response of the electronic circuitry can vary slightly over time, or could be affected by environmental conditions such as temperature and humidity.
Hand-held Analyzer Types 2250 and 2270 – User Manual 52 5.3.1 Standard Calibration 1) Stand away from loud sound sources that may interfere with the calibrator’s signal. 2) Switch on the analyzer: push 3) Tap the Main Menu icon . then Calibration to open the Calibration screen (Fig.5.1). Fig.5.1 Calibration screen This screen contains a bar graph showing the actual sound pressure level and three placeholders for displaying information about the last calibration.
CHAPTER 5 Calibration 53 light will indicate a fast flashing red and an error description will appear in the Status Field. Hint: If the microphone is separated from the analyzer using a microphone extension cable then place the analyzer so it can be seen from the location of the microphone.
Hand-held Analyzer Types 2250 and 2270 – User Manual 54 Note: The Auto detect setting enables the automatic detection of the calibration level. For free-field microphone types (like Types 4189 and 4190) the calibration level from Sound Calibrator Type 4231 is either 93.85 dB or 113.85 dB. For diffuse- or pressure-field types, the calibration level is either 94 dB or 114 dB. The calibration process automatically determines the correct level • 5.
CHAPTER 5 Calibration 55 Fig.5.3 Calibration History screen 5.8 Transducer Database The specifications for Microphone Types 4189 and 4190 (and Preamplifier ZC-0032), which come fitted in the top socket of the analyzer, are described in a transducer database. 1) Tap the Main Menu icon (Fig.5.4) then Transducers to open the Transducer Database screen Fig.5.4 Transducer Database screen 2) Tap the transducer name/number, or select the Plus icon the details in the database (Fig.5.5).
56 Hand-held Analyzer Types 2250 and 2270 – User Manual Fig.5.5 Details in the Transducer Database All the details for the currently selected microphone can be found in the database. You can add other transducers by tapping on the Add New Transducer icon , selecting Microphone, Accelerometer or Direct input from the drop-down, and filling in the details of your particular transducer parameters. See section C.2.1.
CHAPTER 5 Calibration 57 To change which input the transducer uses to connect to the analyzer, tap the Main Menu icon and select Setup from the list, next tap the Input value field and finally, choose the required input from the drop-down list: Top Socket or Rear Socket (Rear Socket refers to the Input socket on the connector panel of the analyzer). At the bottom of the parameter list you can select the calibration history for the currently selected transducer by tapping on the Calibration History link.
Hand-held Analyzer Types 2250 and 2270 – User Manual 58 Fig.5.7 Reminder pop-up You can set the Calibration Interval parameter to either 12 months or 24 months depending on your local requirements. You can disable the facility by selecting the Automatic Calibration Reminder parameter to Off. 5.10 Charge Injection Calibration 5.10.
CHAPTER 5 Calibration Fig.5.8 59 Charge Injection Calibration. Low-leakage resistance capacitor Cc is set in parallel with the microphone and fed with voltage ei. The ratio eo /ei is constant when g, Cc , Cm and Ci are constant. Changes to preamplifier gain (g), cable parameters, microphone capacitance (Cm ), etc., will change eo /ei and, hence, indicate probable changes in calibration Microphone Preamplifier Cable Generator ( eo Cc ei = g C + C + C m i c Cm ) Cc eo g Ci R1 ei 970294/1 5.10.
Hand-held Analyzer Types 2250 and 2270 – User Manual 60 Fig.5.9 CIC tab The result of the Charge Injection Calibration consists of four parameters: • CIC Ratio • CIC Ratio Date • Deviation from Reference • CIC Result The CIC Result can be either ‘Passed’, ‘Background noise too high’ or ‘CIC Ratio deviates from Ref.
61 Chapter 6 Data Management 6.1 Organising Measurements 6.1.1 Description of Jobs and Projects When saving a set of measurement results, they are organised together with setup information, calibration information, annotations and signal recordings in a project. A project contains the following: • Measurement results: – Broadband values (for example, LAeq, LAFmax, LAFmin, etc.
Hand-held Analyzer Types 2250 and 2270 – User Manual 62 Projects are saved in folders which are called ‘jobs’ on your analyzer. These are similar to folders in the Microsoft® Windows® filing system. Jobs can be created: 6.1.
CHAPTER 6 Data Management 63 Tap the icon to go up one level in the job levels. The top level is the Memory level, where physical memory devices can be selected.
Hand-held Analyzer Types 2250 and 2270 – User Manual 64 6.3 Recalling Measurements You can recall your measurement results to display the measured results, re-use setups from previously saved projects or view logged data as a profile. Use the Open command in Explorer – this will recall the project template (display settings and measurement setup used on the saved results) along with the results. This will, however, stop and reset the current measurement 6.3.
CHAPTER 6 Data Management 65 The icon represents a verbal annotation, or commentary. Tap the annotation name and select Play from the drop-down that appears (or tap the icon) to play the commentary using the headphone output. Note: You can also rename or delete annotations, or copy or move annotations to other projects or jobs. The Text icon represents written annotations, or notes. Tap the annotation name and select Open from the drop-down that appears (or tap the icon) to open the Notes editor.
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67 Chapter 7 Connection to PC or Smart Phone 7.1 Introduction You can connect to your analyzer from a PC or smart phone in a number of different ways using a wide range of different connection types: • Use Measurement Partner Suite BZ-5503 for full control of the analyzer – see section 7.2 • Use an Internet browser for online display and control of the analyzer – see section 7.
Hand-held Analyzer Types 2250 and 2270 – User Manual 68 Table 7.1 Connection overview Connect from Connection Type Available Notifications Settings in Preferences BZ-5503 USB Modem = Disabled see section 8.2 – BZ-5503, Internet Browser or Smart Phone with Internet Browser Network or GPRS/EDGE/HSPA Modem Modem = GPRS/EDGE/HSPA Dialup Settings in Dialup Networking Network Settings Possibly settings in DynDNS see sections 8.2 and 8.3 Email see section 8.
CHAPTER 7 Connection to PC or Smart Phone 7.2.
Hand-held Analyzer Types 2250 and 2270 – User Manual 70 Tap Remote Access Settings, or select the Plus icon next to Remote Access Settings and set the Web Server parameters to Enabled. Define sets of Usernames and Passwords: • one set for guest use (view only) • one set for administrator use of the analyzer (view and full control) See section 8.5 and section D.11 for more details. Connect to Analyzer When you enter the IP address or Hostname of the analyzer (see sections 8.2. and 8.
CHAPTER 7 Connection to PC or Smart Phone 71 Fig.7.2 Prompt for username and password The View Instrument Web Page Fig.7.3 shows the View Instrument web page, where you have an online display of your analyzer. You can use the online display for monitoring the measurement only, you cannot change the display, or setup parameters, or start and stop measurements, etc. Fig.7.
Hand-held Analyzer Types 2250 and 2270 – User Manual 72 The View and Control Instrument Web Page Fig.7.4 shows the View and Control Instrument web page, where you have an online display and keyboard for full control of the analyzer. The online display can be used for monitoring the measurement. The keyboard on the screen has the same functions as the analyzer’s keyboard. Click on the display with the cursor to control the analyzer as you do when tapping on the analyzer display. Fig.7.
73 Chapter 8 Advanced Use of the Analyzer – Tips and Tricks 8.1 Setting your Preferences on the Analyzer You can specify a number of parameters controlling display settings, power settings, regional settings, storage settings and users. These parameters are grouped together under Preferences. You access preferences by tapping on the Main Menu icon from the list of options. The screen shown in Fig.8.1 will appear. Fig.8.
Hand-held Analyzer Types 2250 and 2270 – User Manual 74 8.1.1 Display Settings Tap Display Settings, or next to Display Settings, to expand the list of available display settings (Fig.8.2). These parameters allow you to select a suitable display colour scheme. This may vary, depending on the lighting conditions at the time of the measurement. Fig.8.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks 8.1.2 75 Power Settings The analyzer has an advanced power management function that takes care of supplying the different circuits with adequate power and switches off circuits that are not in use. These power management functions can be changed via the Power Settings screen (Fig.8.3).
Hand-held Analyzer Types 2250 and 2270 – User Manual 76 Fig.8.4 Power Settings overview ‘Standby’ Parameter ‘Backlight Dim’ Parameter ‘Turn off Backlight’ Parameter (hardware v. 1 – 3) Backlight off Time 040284/2 If the analyzer is left unused, not measuring and not communicating over the USB interface, it will go to Standby after the time specified in the Standby parameter. If in Standby mode, you must press to switch the analyzer on again.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks 77 Fig.8.5 Regional Settings screen Select your preferred settings for Decimal Point and Date Separator and select your preferred Date Format (date and time) from the six different formats provided in the drop-down. Then select your Time Zone from the list. A number of different languages are available for your analyzer.
Hand-held Analyzer Types 2250 and 2270 – User Manual 78 Fig.8.6 Storage Settings screen 8.1.5 Headphone Settings The Headphone Settings allow you to control the output to the headphone socket on the connector panel. Commentary annotations on measurements can always be heard on the headphones, regardless of the options chosen in Headphone Settings. In addition to the commentary annotations, you can listen to the measured signal for monitoring purposes.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks 8.1.6 79 Multi-user Facility The analyzer can handle more than one user. Each user can have their own set of preferences, templates and jobs and projects – completely invisible to other users. This can also be very useful in organising large measurement jobs or cases – you can separate the cases completely from each other by handling each case as a separate user.
Hand-held Analyzer Types 2250 and 2270 – User Manual 80 When a printer has been selected under the Printer Used parameter, then the Print Screen command in the Main Menu list appears. Use this command to print a screen dump of any screen on the analyzer. The printer must either be a mobile thermal printer (from AM Tech or Seiko) or accept the PCL® printer language: • MPS: Mobile Pro Spectrum – a mobile thermal printer from AM Tech (www.amteq.co.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks 8.2.2 81 Connection to Network using GPRS/EDGE/HSPA Modem Note 1: Turn off the analyzer when connecting the analyzer to a modem. Note 2: The SIM card account should include a data subscription and should be usable without a pincode. To use the modem you need to set up the parameters in Dialup Networking (listed below) and set the Modem parameter to GPRS/EDGE/HSPA Dialup.
Hand-held Analyzer Types 2250 and 2270 – User Manual 82 For hardware version 4, modems with an RS– 232 serial interface can be connected using a USB to serial converter inserted in the USB Type A socket of the analyzer. The following USB to serial converters have been tested: • USB to RS–232 Converter UL-0250 (See “Ordering Information” on page 216.) • ES-U-1001-R10, ES-U-1001-B10 and ES-U-1001-A from EasySync (www.easysync-ltd.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks 83 The analyzer can then be configured to notify DynDNS.com each time the global IP address is set or changed. When BZ-5503 or an Internet browser connects to the analyzer, it then uses a hostname defined by DynDNS.com. From DynDNS.com it then gets the updated IP address. You need to make an account at DynDNS.com, specifying a user name and a password for the account and a hostname (for example, 'MyBK2250.dyndns.org') identifying your analyzer.
Hand-held Analyzer Types 2250 and 2270 – User Manual 84 8.3.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks 85 Type 2270: • – LAN Socket: (default) Select this to connect via a LAN cable.
Hand-held Analyzer Types 2250 and 2270 – User Manual 86 Parameters for Wireless LAN Only Name Name (SSID) of the network you want to connect to. Update the name either by: • entering a name directly, or • tapping on Available Networks and selecting a name from the list Available Networks Tap the line to get a list of available networks. Tap a name in the list to connect to this network. The name is inserted in the Name line above this line.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks Table 8.
Hand-held Analyzer Types 2250 and 2270 – User Manual 88 Table 8.2 Content of Notification Information Type Content Reason for notification ‘Test’, ‘Alarm’ or ‘Status’ followed by a short description Time of notification Date and Time Instrument ID Serial No.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks You can test the system by tapping on the Main Menu icon cation via SMS”. 89 and selecting “Send Notifi- Note 1: Two to three text messages will be used to send the complete notification – depending on the content and language settings. Note 2: Text messages cannot be sent or received while the analyzer is connected to BZ-5503 or displayed online. 8.4.
Hand-held Analyzer Types 2250 and 2270 – User Manual 90 8.5 Web Server To connect to the analyzer using an Internet browser, the following conditions must be fulfilled: • The analyzer must be connected to a network as described in section 8.2.2, section 8.2.3 and section 8.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks 91 Data from the weather station is automatically obtained during the measurement and saved on data – see measurement parameters in Appendix B. The measured data can be displayed as parameters from the Weather group. Fig.8.8 Data from weather station obtained during a measurement and saved on data 8.6.
Hand-held Analyzer Types 2250 and 2270 – User Manual 92 In some cases initialization can take up to several minutes depending on the conditions mentioned above before complete GPS data are displayed on the screen. The GPS may get a faster fix if connected through a small USB cable (delivered together with the GPS). If a GPS receiver is connected when data are saved in a project, a GPS note is automatically created as an annotation with the GPS information. See more details on GPS notes in section 3.5. 8.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks 93 Define settings for each of the 30 metadata. Tap the Edit icon in front of the metadata you want to edit (Fig.8.10) to define: • Metadata: – Enabled (visible and editable on the Annotations screen) or – Disabled (invisible on the Enabled (visible and editable on the Annotations screen) • Name: Insert a name preceding the metadata value when displayed on the Annotations screen • Type: Select a type suitable for your metadata.
Hand-held Analyzer Types 2250 and 2270 – User Manual 94 Fig.8.10 Edit metadata 8.7.2 Timers and Automatic Measurements Automatic control of the analyzer is available via one or more of the analyzer’s timers (up to ten). The purpose of a timer is to initiate measurements in the absence of an operator.
CHAPTER 8 Advanced Use of the Analyzer – Tips and Tricks 95 Fig.8.11 Example Timer Setup In the topmost line you can add other timers by tapping on the Add New Timer icon . You can delete a timer from the list by tapping on the Delete Timer icon . Only timers created by the current user can be deleted. To delete a timer defined by another user, you have to logon as the other user and then delete the timer.
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97 Chapter 9 Updating and Upgrading Applications, Maintenance, Calibration and Troubleshooting 9.
Hand-held Analyzer Types 2250 and 2270 – User Manual 98 9.2.1 Update/Upgrade using BZ-5503 BZ-5503 can be used for updating or upgrading new software applications on your analyzer. It can even downgrade to specific software versions if required by type approval authorities. Using BZ-5503, you can also install licenses for the specific applications; and, if you have hardware version 1 – 3, install your preferred language (with G4 hardware, all languages are pre-installed in the analyzer).
CHAPTER 9 Updating and Upgrading Applications, Maintenance, Calibration and Troubleshooting 99 4) When download is complete, the measurement is paused and normal use of the analyzer is prevented. Connections to the analyzer are terminated and the upgrade of the analyzer will start. This will take 10-15 minutes and the analyzer will reboot when finished. Any unsaved logging data will be saved and the analyzer is ready to use again.
Hand-held Analyzer Types 2250 and 2270 – User Manual 100 9.2.3 Downgrade to an Earlier Version It is possible to downgrade to an earlier version of the software: 1) Change the “latest” part of the server address (see Fig.9.2) to the requested software package, for example, “SW22” 2) Press Check for updates. 3) Follow the procedure described in section 9.2.1 or section 9.2.2. Note: Only software packages equal to or above SW24 can downgrade to another package.
CHAPTER 9 Updating and Upgrading Applications, Maintenance, Calibration and Troubleshooting 9.4.2 101 SD/CF Cards and USB Sticks The Logging, Enhanced Logging and Signal Recording software requires that measurements are saved on memory cards – SD or (with hardware versions 1 – 3) CF. A USB memory stick can be used from hardware version 4. Device Format and Speed In order to ensure reliable operation with the memory device, the format of the file system and the speed of the device are tested.
Hand-held Analyzer Types 2250 and 2270 – User Manual 102 size of the device, how much it has been used, how fragmented the memory is, and even the day of production of the device. Two ‘identical’ memory devices can have a different performance because the manufacturer has changed the internal technology without notice. In general, as a rule of thumb, you should select devices aimed for the industrial or professional photographer market.
CHAPTER 9 Updating and Upgrading Applications, Maintenance, Calibration and Troubleshooting 9.4.4 103 Touch Screen If tapping with the stylus on the screen seems to be getting more inaccurate, you can adjust the touch sensitive screen, as follows: • 9.4.5 In the Preferences screen, under Display Settings activate the link Adjust Touch Screen. This displays a full screen with guidance on how to tap a cross five times at different places on the screen.
104 Hand-held Analyzer Types 2250 and 2270 – User Manual Within a few seconds the display in Fig.9.4 will be shown. Fig.9.4 Update 2250 software screen for hardware versions 1 – 3 c) Cancel the update by pressing any other pushbutton than the Accept pushbutton . Fig.9.5 Reset to default settings screen for hardware versions 1 – 3 d) Press the Accept pushbutton – to reset to default settings. With hardware version 4 (G4), the analyzer contains two sets of the firmware/software package and settings.
CHAPTER 9 Updating and Upgrading Applications, Maintenance, Calibration and Troubleshooting 105 Fig.9.6 Restore factory firmware and settings on hardware version 4 c) Press the Accept pushbutton to restore factory firmware and settings. If the analyzer now functions normally, you should install the software package of your preference as described in section 9.2. Brüel & Kjær recommends that you always use the latest available.
Hand-held Analyzer Types 2250 and 2270 – User Manual 106 analyzer. The Maintenance Mode initial screen will be displayed, and then within a few seconds the screen shown in Fig.9.4 will appear. Press the Accept pushbutton to update the software. This will take approximately 5 minutes. WARNING: Do not remove the CF-card while updating the analyzer software! When the analyzer software has been updated, you will get the option of resetting to the default settings.
CHAPTER 9 Updating and Upgrading Applications, Maintenance, Calibration and Troubleshooting 9.6 Services at Brüel & Kjær for Types 2250 and 2270 9.6.1 Accredited Calibration 107 For Types 2250 and 2270, you can order accredited calibration and choose between DANAK, A2LA, UKAS, Eichamt (Austria), RvA, ENAC, NATA and Inmetro. For Spain, Primitiva is available. The calibration will be performed in an ISO 17025 certified laboratory. 9.6.
Hand-held Analyzer Types 2250 and 2270 – User Manual 108 9.6.7 Rental To ensure optimal uptime, you can rent a substitute hand-held analyzer* while yours is being calibrated. To arrange rental, please contact your local Brüel & Kjær representative. 9.6.8 Training Basic knowledge on sound and vibration measurement, analyzer training and application training are a few examples of what local training or consultancy hoursa can do for you.
109 Chapter 10 1/1- or 1/3-octave Frequency Analysis (Optional Module) Frequency Analysis Software BZ-7223 enables you to make 1/1-octave or 1/3-octave measurements and broadband sound level measurements simultaneously. Check the About screen to see whether you have the license to run the Frequency Analyzer. (To access the About screen, tap the Help icon then tap About.) See Chapter 9 for instructions on installing the license for the Frequency Analyzer. 10.
Hand-held Analyzer Types 2250 and 2270 – User Manual 110 2) Tap the Main Menu icon and select Setup from the list of options. Set the Broadband and Spectrum parameter to A, B, C or Z, as required. (A/B-weighting is determined by setting the parameter in Setup > Frequency Settings > Broadband (excl. peak). Set the Bandwidth parameter to 1/1-octave or 1/3-octave before making the measurement. To exit the screen, tap the icon. Fig.10.
CHAPTER 10 1/1- or 1/3-octave Frequency Analysis (Optional Module) 10.3 111 Displaying the Results The Frequency Analyzer measurement screen includes three tabs at the bottom: Spectrum, Broadband and XL View (Extra Large). The tabs allow you to choose different ways of displaying the measurement results. All but the Spectrum tab have been covered in Chapter 3. However, a quick recap is provided below.
112 Hand-held Analyzer Types 2250 and 2270 – User Manual 2) Adjust the X-axis (the horizontal frequency axis below the graphical display) by tapping on the scale and accessing the drop-down menu (Fig.10.
CHAPTER 10 1/1- or 1/3-octave Frequency Analysis (Optional Module) 113 Fig.10.4 Scaling the Y-axis on the Spectrum display 4) Select Auto Zoom to adjust the range of the Y-axis for best fit of the measured spectrum. 5) Select Zoom In/Zoom Out to adjust the zoom. 6) Select Scale Up/Scale Down to adjust the full scale value on the Y-axis – or select Auto Scale to select the best scaling for viewing the spectra – without adjusting the zoom.
114 Hand-held Analyzer Types 2250 and 2270 – User Manual 8) To exit the Spectrum Table, tap the icon. 9) Auto Zoom and Auto Scale automatically close the drop-down menu, otherwise, select Close, tap outside the drop-down list or use the Left arrow pushbutton to close the menu. Hint: A quick way of auto zooming is to tap anywhere in the spectrum and then press the Accept pushbutton twice. Note: Save the template, if you want to use the display settings for other measurements.
CHAPTER 10 1/1- or 1/3-octave Frequency Analysis (Optional Module) 10.3.1 115 Smileys A smiley will be shown to the right of the project name if there are any issues with calculating noise parameters, or displaying noise curves (see the overview in Table 10.1). Table 10.1 Overview of Smileys Smiley 10.
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117 Chapter 11 Logging (Optional Module) Logging Software BZ-7224 enables you to measure and save data periodically on SD or CF cards. You can also save to a USB memory stick with hardware version 4. The module is optimised for attended use, which means that while measuring you can annotate any sound online, as well as ‘mark’ up to five different sound categories online.
Hand-held Analyzer Types 2250 and 2270 – User Manual 118 Check the About screen to see whether you have a license to run the Logging option. (To access the About screen, tap the Help icon then tap About.) See Chapter 9 for instructions on installing the license for the Logging option. 11.1 Setting up the Analyzer 1) Select the Logging project template. (See section 3.3.1 for more details on templates.) The project template is displayed on the black banner at the top of the screen.
CHAPTER 11 Logging (Optional Module) 119 Fig.11.1 The Setup screen 5) Under the Measurement Control parameters, set the Measurement Time and Logging Period as required. Set Synchronize with clock to Yes if you want the logging to synchronise with whole minutes or hours. For example, if Logging Period is set to 1 minute and you start the measurement at 8:12:33, then the first logging interval will be from 8:12:33 to 8:12:59 (27 seconds), the second will be from 8:13:00 to 8:13:59 (60 seconds), etc.
120 Hand-held Analyzer Types 2250 and 2270 – User Manual 9) Under Markers you can specify the names of the five available markers.
CHAPTER 11 Logging (Optional Module) 121 Fig.11.2 Relationship between trigger parameters LAeq 100 dB 90 dB Trigger Parameter = LAeq Start Slope = Rising 80 dB 70 dB Start Duration Stop Duration 60 dB 50 dB Start Level = 50 dB 2s Stop Level = 40 dB 40 dB 3s Trigger Point 30 dB Trigger Point 20 dB 10 dB 0 Pre-recording (BZ 7226 only) Time in secs.
Hand-held Analyzer Types 2250 and 2270 – User Manual 122 However, if you choose to annotate the profile during the measurement, the Annotations icon will appear below the profile, not as a paperclip icon in the Status Field or attached to a project in Explorer, as described previously. In this case, you view the annotation using the method described in section 11.3.1. 11.2.
CHAPTER 11 Logging (Optional Module) 123 Fig.11.3 Profile View (showing extended Status Field) Status Field The Status Field has been extended to include an extra line of information below the two existing lines of information covered previously in the Sound Level Meter and Frequency Analyzer (see Fig.11.3). This extra line of information allows you to: • Select whether the results of the Total measurement from the Logged measurement, or from the Logged(100 ms) measurement are displayed.
124 Hand-held Analyzer Types 2250 and 2270 – User Manual Some interaction with the display will automatically freeze and unfreeze the display (only while measuring): • Tap the stylus on the profile. This will set the profile cursor and freeze the display update of the profile. You can move the cursor to any point in the profile by using the left and right arrow pushbuttons. The profile will be scrolled automatically, if necessary.
CHAPTER 11 Logging (Optional Module) 125 Fig.11.4 Selecting annotations A drop-down menu appears, select the required function: • Open note or Play commentary • Delete annotation • Move annotation (to the position on the display where the stylus was removed from the display) Scale the Y-axis (left-hand vertical scale of the graphical display) by tapping on the scale and accessing the drop-down menu (as in the Spectrum display): 11.3.
126 Hand-held Analyzer Types 2250 and 2270 – User Manual On the analyzer, Marker 1 is used as an Exclude Marker, while Markers 2 to 5 are used as Event Markers. All four event markers can be user-defined. You can define a marker by tapping on the Main Menu icon and selecting Setup, followed by Markers. Marker 2 is set to a Manual Event marker by default – it can be controlled by the Manual Event pushbutton and the stylus.
CHAPTER 11 Logging (Optional Module) 127 position where you want the marker to end. This will display a second cursor. Next, remove the stylus from the display and a drop-down menu appears showing the five markers you have specified in the setup. Select the marker you require. The marker is displayed above the profile and the cursors disappear. 11.3.3 Editing Markers on Profiles To widen a marker: 1) Tap and hold the stylus on the profile display at a position within the marker range.
Hand-held Analyzer Types 2250 and 2270 – User Manual 128 11.3.4 Annotate Sound Categories You can annotate the measurement online with a spoken comment or a written note or (with Type 2270 only) an image. The annotation is displayed as an icon below the sound profile. Annotating During the Measurement The measurement parameter is displayed as a progressing profile. Use of Pushbuttons Press and hold down the Commentary pushbutton and talk to the analyzer to make your comment.
CHAPTER 11 Logging (Optional Module) 129 3) Remove the stylus from the display and a drop-down menu appears. 4) Select Move Comment (or Move Note, or Move Image) from the drop-down menu. To delete an annotation: 1) Tap and hold the stylus on the profile display at a position to the left of the Annotations icon you want to delete. 2) Drag the stylus to a position to the right of the annotation. 3) Remove the stylus from the display and a drop-down menu appears.
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131 Chapter 12 Enhanced Logging (Optional Module) Enhanced Logging Software BZ-7225 enables you to measure and save data periodically on memory cards. You can also save to a USB memory stick with hardware version 4. The module is optimised for unattended use, which means that the module will measure and save data in an efficient way, without the requirement for an operator to be present.
Hand-held Analyzer Types 2250 and 2270 – User Manual 132 Table 12.
CHAPTER 12 Enhanced Logging (Optional Module) 133 Note: All other measured broadband and spectral parameters are logged automatically per report period. Then you can select: • Number of CICs • Desired time periods for calibration 6) Under the Logged Spectrum parameters, you can choose to log Full Spectral Statistics per Logging Period or not. Note: Logging the full spectral statistics at a short logging period (for example, every second) takes up a lot of space on the memory card.
Hand-held Analyzer Types 2250 and 2270 – User Manual 134 051114 001 (containing data for a whole day – November 14th) 051115 001 (containing data from midnight to the middle of the day on November 15th) If you did not select Auto-naming of Projects then you would have the following projects (assuming the Project Name Prefix parameter was set to Project and no projects had been saved before in the directory): Project 001 Project 002 Project 003 If you have set the Charge Injection Calibration parameter to
CHAPTER 12 Enhanced Logging (Optional Module) 12.3.1 135 The Profile View The Profile view displays a profile of a logged broadband parameter (dB versus time). See Fig.12.1. Fig.12.1 Profile view in Enhanced Logging 12.3.2 Displaying Noise Indicators The Lden and Ldn parameters are displayed in the Broadband view when selecting Total in the Result Selector. Then select the Noise Indicators from the Leq parameter group. See Fig.12.2. Fig.12.
Hand-held Analyzer Types 2250 and 2270 – User Manual 136 12.3.3 Saving and Recalling Results Measurements are saved and can be viewed later, in the same way as described for the Sound Level Meter Project in Chapter 3 and Chapter 6.
137 Chapter 13 Signal Recording Option Signal Recording Option BZ-7226 allows you to record the input signal (typically sound) in either 16-bit or 24-bit resolution during measurement (24-bit for BZ-7222/23/24/25/30/33 only). The signal recording can be controlled manually or by using an external trigger signal. The recording can also be triggered when a measured parameter exceeds a preset level (BZ-7224 and BZ-7225 only).
Hand-held Analyzer Types 2250 and 2270 – User Manual 138 13.1.1 Setting up the Analyzer 1) Select a Sound Level Meter project template or a Frequency Analyzer project template. (see section 3.3.1 for more details on templates.
CHAPTER 13 Signal Recording Option 139 8) Set Automatic Gain Control to On – if you just want to listen to the signal afterwards. The full 120 dB dynamic range (from max. input level and down) will be converted to 40 dB and the signal is stored as a 16-bit WAV file. Set Automatic Gain Control to Off – if you need to record calibrated signals or need to analyze the wav-file afterwards on a PC. Select Resolution = 24 bit (recommended) to cover the full 120 dB dynamic range (from max.
Hand-held Analyzer Types 2250 and 2270 – User Manual 140 13.1.3 Playing the Recording Signal recordings are attached to the measurement project as annotations. The annotations icon is displayed in the Status Field to indicate this. Tap the paperclip to open the list of annotations. Tap the annotation to play it back – details in Chapter 3 and Chapter 6. 13.2 Logging and Enhanced Logging Software You can use the Signal Recording facility together with the Logging and Enhanced Logging Software.
CHAPTER 13 Signal Recording Option • Exclude Event, if you want to start and stop the recording using the Back-erase pushbutton during the measurement • External Event, if you want to start and stop the recording using an external trigger signal, connected to the Trigger Input • Level Event, if you want to start and stop the recording based on the level trigger settings during the measurement • All Events, if you want to start and stop the recording based on any of the events 141 Note: When Record
Hand-held Analyzer Types 2250 and 2270 – User Manual 142 If you set Recording Control to Automatic, the recording will start when the measurement is started and last for Maximum Duration or Elapsed Time, whichever is smallest. If you continue a paused measurement, then a new recording is started.
CHAPTER 13 Signal Recording Option 143 Fig.13.1 Example Logging display (showing internal buffer marker) The small triangle above the profile indicates the amount of sound you have in the internal buffer – ready for storage in a wave-file. You will have sound from this triangle to the righthand side of the profile. The triangle is updated every second.
144 Hand-held Analyzer Types 2250 and 2270 – User Manual Fig.13.2 Playing the recording – the drop-down menu Select one of the four ways of playing a sound: Selection will play the part you have selected; Repeat Selection will play the selected part until you press Cancel on the pop-up menu; To End will play the sound from the position you selected the sound marker to the end; and finally All will play the entire signal recording, regardless of your selection point. Fig.13.
CHAPTER 13 Signal Recording Option 145 Fig.13.4 Playing the recording – minimizing the pop-up The small blue button bar at the top can be maximized again by tapping the close it and stop playing back by tapping the icon. 13.2.5 icon, or you can Signal Recordings on the PC When projects including signal recording have been transferred into an Archive on a PC using BZ-5503, then the recordings can be played back directly from BZ-5503.
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147 Chapter 14 Reverberation Time Software (Optional Module) 14.1 Introduction Reverberation Time Software BZ-7227 enables you to measure reverberation time in 1/1-octave or 1/3-octave. Check the About screen to see whether you have a license to run Reverberation Time Software. (To access the About screen, tap the Help icon then tap About.) See Chapter 9 for instructions on installing a license for Reverberation Time Software. 14.1.
Hand-held Analyzer Types 2250 and 2270 – User Manual 148 Fig.14.1 Definition of Reverberation Time (RT). Evaluation range of 30 dB for calculation of T30 indicated dB Regression Line 0 dB Excitation Level –5 dB Evaluation Range –35 dB Background Noise Level –60dB Time Reverberation Time 060210 RT varies between positions in a room, so it is usually measured at several positions.
CHAPTER 14 Reverberation Time Software (Optional Module) 149 Fig.14.2 Typical RT measurement setup using a loudspeaker source DIRAC MP3 Player White -20 -10 0 dB Pink Protect Power Amplifier Type 2734 230/115 V AC / 650 W Power On O Balanced In -6 Generator I Loudspeaker -5 Level -4 -9 -12 In Fuse -3 Remote Out -18 -2 -24 -1 -30 0 dB 4292-L 2734 ZE-0948 2250 110009 Fig.14.
150 Hand-held Analyzer Types 2250 and 2270 – User Manual 6) Steps 2 to 5 are automatically repeated a chosen number of times and the measured decays are averaged together to reduce the uncertainty of the measurement. 7) The reverberation time spectra EDT, T20 and T30 are calculated and displayed on the screen. The measurement can be in octaves or 1/3-octaves in parallel over a selectable frequency range, allowing you to focus sound power on the relevant range.
CHAPTER 14 Reverberation Time Software (Optional Module) 151 4) The impulse measurement stops after the analyzer detects the background noise level again (automatically measured by the analyzer). 5) The analyzer performs backward integration of the impulse measurement. 6) The reverberation time spectra EDT, T20 and T30 are calculated and displayed on the screen. The measurement can be in octaves or 1/3-octaves in parallel over a selectable frequency range.
Hand-held Analyzer Types 2250 and 2270 – User Manual 152 14.2.1 Interrupted Noise Method 8) Set the number of decays you want to measure per position – the analyzer automatically controls the generator, measurement of the decays and averaging the decays. 9) Set the Generator as required – set Generator Type = External if you want to control an external generator (details in Appendix A) – otherwise leave it at Internal to use the internal generator. 10) Select Noise Type for the internal generator.
CHAPTER 14 Reverberation Time Software (Optional Module) 153 impulse response by post-processing software like DIRAC Room Acoustics Software Type 7841. The recordings will contain the signal from when you press the Start pushbutton until the measurement stops. The recording will be attached to the measurement as an annotation. Note: Signal Recording requires a license for Signal Recording Option BZ-7226. To exit the Setup screen, tap the 14.2.4 icon.
Hand-held Analyzer Types 2250 and 2270 – User Manual 154 Fig.14.5 Selecting the bands for serial measurements Left: Selecting the band for serial measurement Right: The arrow is pointing to the “s” symbol, which indicates the selected frequency band Note: A small s appears above the selected frequency bands (Fig.14.5). 4) When you have selected the frequency bands you want to re-measure, press the Start/Pause pushbutton.
CHAPTER 14 Reverberation Time Software (Optional Module) 14.3 155 Displaying the Results The Reverberation Time Measurement screen includes three tabs at the bottom: Overview, Spectrum and Decay. The tabs allow you to choose different ways of displaying the measurement results: 14.3.1 • Overview: Shows the measurement positions in a table – one position per row.
156 Hand-held Analyzer Types 2250 and 2270 – User Manual The third line of information allows you to: • Select the measured position. The selected position is the one highlighted in the table.
CHAPTER 14 Reverberation Time Software (Optional Module) 14.3.2 157 Spectrum The Spectrum tab shows the reverberation time spectrum from a position, or the room average reverberation time, or both. The sound level is displayed during measurements. Fig.14.7 Spectrum tab Status Field The Status Field on the Spectrum tab is the same as on the Overview tab.
158 Hand-held Analyzer Types 2250 and 2270 – User Manual Fig.14.8 Spectrum view when measuring The Main Spectrum graph on the display (the one with bars) is selected using the parameter selector on the second line of the two shown above the graph (LZF in Fig.14.8). The smileys below the spectra (if there are any) belong to the Main Spectrum. The parameter selector for the Main Spectrum is linked to the selector on the Overview tab and the parameter selector for the main decay on the Decay tab.
CHAPTER 14 Reverberation Time Software (Optional Module) 159 Fig.14.9 Spectrum table Auxiliary Parameters Below the graphics are two lines containing parameters for displaying the wide band reverberation times for the current position, or the room average. You are also able to display the LCF and LAF broadband values. 14.3.3 Decay The Decay tab shows the reverberation time decay from a position or the room average – or both (Fig.14.10).
160 Hand-held Analyzer Types 2250 and 2270 – User Manual Fig.14.10 Decay view The main decay on the display (displayed as a continuous line) is selected using the parameter selector in the second line of the two shown above the display (T30@Pos in Fig.14.10). The parameter selector for the main decay is linked to the selector on the Overview tab and the parameter selector for the main spectrum on the Spectrum tab.
CHAPTER 14 Reverberation Time Software (Optional Module) 14.4 161 Measurements with Graphical Position Management The analyzer can keep track of the source and receiver positions in a graphical way together with the measurements.
162 Hand-held Analyzer Types 2250 and 2270 – User Manual Fig.14.12 Overview tab showing two sources and three receiver positions You can move the sources or receivers on the map by tapping on the source/receiver (see Fig.14.13), select Move from the drop-down menu that appears, then tap at the position where you want the source/receiver (see Fig.14.14). Fig.14.
CHAPTER 14 Reverberation Time Software (Optional Module) 163 Fig.14.14 Sources and receivers moved to places on the map in accordance with their physical position in a room The dark-green fields on the map indicate the selected Source-Receiver relation. The next measurement will be saved at this position. Results from the measurements at the receiver positions are displayed in the boxes at the receiver positions – determined by the parameter and frequency selector in the headline of the map. Fig.14.
164 Hand-held Analyzer Types 2250 and 2270 – User Manual Tap Map just above the Add Source and Add Receiver icons, and select Table to display the measurements in a table (see Fig.14.16). The table contains the same information as the table described in the previous section when measuring without position management (Fig.14.6). Fig.14.
CHAPTER 14 Reverberation Time Software (Optional Module) 165 The Spectrum and Decay views function in the same way as when measuring without position managing. The only difference is the indication of the position in the Status Field – this is now a Source-Receiver selector instead of a Position Number selector. 14.5 Quality Indicators There are quality indicators for each frequency band in each reverberation time spectrum for each reverberation time spectrum.
Hand-held Analyzer Types 2250 and 2270 – User Manual 166 The quality indicators (first column) are shown in the spectrum table only.
167 Chapter 15 Tone Assessment Option BZ-7231 – 1/3-octave Method 15.1 General Tone Assessment Option BZ-7231 includes tone assessment according to selected methods. The software module includes an ‘FFT based’ as well as a ‘1/3-octave based’ method. It allows assessment of tones on-site. The result of the tone assessment is the adjustment to be added to the LAeq as described in the relevant standards for calculating rating level.
Hand-held Analyzer Types 2250 and 2270 – User Manual 168 If you have purchased Type 2250/2270 together with the software application(s), then the relevant license(s) comes pre-installed on the analyzer. If you purchased a separate software application for your Type 2250/2270, then you have to install the license on the analyzer. This is done using BZ-5503, please consult the on-line help included with the BZ-5503 software for instructions on how to install a license. 15.
CHAPTER 15 Tone Assessment Option BZ-7231 – 1/3-octave Method 169 Fig.15.
Hand-held Analyzer Types 2250 and 2270 – User Manual 170 15.3 Tone Assessment According to Italian Law Tone Assessment in Italy is performed on normal 1/3-octave spectra but with an option to use narrow bands (such as FFT), in case of doubt. The method described in the Italian “Decreto 16 marzo 1998” states that the 1/3-octave LZFmin spectrum is used for evaluation of tones in noise.
CHAPTER 15 Tone Assessment Option BZ-7231 – 1/3-octave Method 15.4 Setting up the Analyzer 15.4.1 Selecting the Tone Assessment Option 171 Tap the Main Menu icon and select Setup from the list of options. Under the Tone Assessment parameters (on the full list of options) tap the Tone Assessment option and set it to On (Fig.15.3). Fig.15.3 Setting Tone Assessment option on From the Setup screen, select either the ISO 1996:2-2007 or the Italian Law DM 16-03-1998 method: Fig.15.
Hand-held Analyzer Types 2250 and 2270 – User Manual 172 If you select the tone assessment method according to the ISO 1996-2, Annex D standard, you can accept the default setup according to that standard. You can then change the various tone parameters according to your needs (apart from the ISO 226 parameter which is greyed-out) and proceed directly to the measurement.
CHAPTER 15 Tone Assessment Option BZ-7231 – 1/3-octave Method 173 Italian Law When tone assessment according to Italian Law is selected, the analyzed spectrum must be the Z-weighted minimum level measured in each 1/3-octave band, LZFmin. The LZFmin parameter is automatically selected on the measurement page when you select DM 16-03-1998. The test for loudness contours is set by default to the 1987 Free-field option of the ISO 226 contour parameters.
Hand-held Analyzer Types 2250 and 2270 – User Manual 174 The pop-up window can be de-activated for the rest of the measurement session. To activate it again, you will have to reload the template or restart your analyzer. This automatic check is deactivated when the Tone Assessment parameter is set to Off in the Setup screen. To reset all the relevant parameters to the default setup, tap the OK button. (The default setup includes preset parameters that comply with the selected standard.
CHAPTER 15 Tone Assessment Option BZ-7231 – 1/3-octave Method 15.5 Measuring 15.5.1 Result Display 175 Tone assessment is not performed until the Tone parameter is selected above the spectrum. (This is done by tapping one of the parameter fields in the two lines above the Spectrum display and choosing Tone from the drop-down menu.) Once selected, tone assessment is carried out on the selected spectrum. The results are updated during the measurement. Fig.15.
Hand-held Analyzer Types 2250 and 2270 – User Manual 176 The information shown in the value panel can be changed by tapping in the field. From the tone parameters, the adjustment and the selected tone standard can be selected. See Fig.15.10. Results from the tone assessment can also be found by tapping on the Broadband tab and browsing the Broadband view in a similar way. Fig.15.10 Changing the information shown in the value panel 15.
CHAPTER 15 Tone Assessment Option BZ-7231 – 1/3-octave Method 15.7 177 Enhanced Logging Software BZ-7225 Template The tone parameter can be shown, for both the logging and the report periods, in the Spectrum view of the Enhanced Logging template (Fig.15.12). Fig.15.12 Viewing results on the enhanced logging template Please find more information about setting up the Enhanced Logging in Chapter 12. 15.
Hand-held Analyzer Types 2250 and 2270 – User Manual 178 If you have selected 1/1-octave, an Accelerometer as transducer, or a Direct input, tone assessment will be performed, but a smiley will be displayed. When you tap the smiley it will advise you to use a Microphone. For an overview of all the remedies associated to the various smileys, please refer to Table 15.2 Table 15.
179 Chapter 16 2-channel Option BZ-7229 16.1 General 2-channel Option BZ-7229 enables 2-channel measurements with Hand-held Analyzer Type 2270. This option adds an extra channel of measurement data. The two channels can have inputs from the same type of transducer (e.g., two microphones) or different transducers (e.g.
Hand-held Analyzer Types 2250 and 2270 – User Manual 180 16.2 Connecting Transducers Please refer to section 2.5 for connecting two transducers to the instrument and to Chapter 5 for creating the transducers in the transducer database and for calibrating. Tap Main Menu and select Setup > Input you will see two columns for the individual settings of the two channels. See Fig.16.1 for how to setup the two transducers.
CHAPTER 16 2-channel Option BZ-7229 181 2) As a dual-channel, multi-range sound level meter and frequency analyzer – Both channels can be measured simultaneously – The full level measuring range is covered in two ranges with a level range control.
Hand-held Analyzer Types 2250 and 2270 – User Manual 182 3) Select (Fig.16.3) – Setup > Frequency Settings to set Broadband frequency weighting parameters, as required – Setup > Statistics to set statistics parameters, as required 4) Tap to exit Setup. Fig.16.3 Setting the frequency and statistics parameters 16.4.
CHAPTER 16 2-channel Option BZ-7229 183 Fig.16.4 Displaying the results 16.4.3 Saving Results Measurements are saved and can be opened later in the same way as described for the Sound Level Meter project in Chapter 3. 16.5 Setting Up 2-channel Frequency Analyzer 1) Select the 2-Ch. Frequency Analyzer project template.
Hand-held Analyzer Types 2250 and 2270 – User Manual 184 Fig.16.5 Setting the frequency and statistics parameters 16.5.1 Controlling the Measurement The measurement is controlled in the same way you would control a normal Sound Level Meter measurement, using Start/Pause , Continue , Back-erase and Reset pushbuttons, see Chapter 3 for more details. The two channels are controlled and measured simultaneously, thus some of the housekeeping parameters are common for the two channels, e.g.
CHAPTER 16 2-channel Option BZ-7229 185 When the same type of transducers are used by both channels (e.g., two microphones or two accelerometers) or if you only display data from one channel, then the spectrum display is the standard spectrum display (Fig.16.7). Fig.16.7 Single-channel spectrum When the transducers at the two channels are of different types (e.g., a microphone and an accelerometer), the scaling of the two spectra can be set individually for easy comparison. Ch.
Hand-held Analyzer Types 2250 and 2270 – User Manual 186 16.6 Setting Up 2-channel Logging and Enhanced Logging 1) Select: – The 2-Ch. Logging SLM project template for logging broadband data only from the two inputs – The 2-Ch. Logging project template for logging both spectra and broadband data from the two inputs – The 2-Ch. Enh. Logging project template for logging both spectra and broadband data from the two inputs, making reports and periodically saving the data on the memory card. Note: 2-Ch.
CHAPTER 16 2-channel Option BZ-7229 16.6.1 187 Controlling the Measurement The measurement is controlled in the same way you would control a single-channel Logging or Enh. Logging measurement. See Chapter 11 and Chapter 12 for more details. The two channels are controlled and measured simultaneously, thus some of the housekeeping parameters are common for the two channels, e.g., Start Time and Elapsed Time. 16.6.
188 Hand-held Analyzer Types 2250 and 2270 – User Manual
189 Chapter 17 Low Frequency Option BZ-7234 Low Frequency Option BZ-7234 enables • G-weighting parameters in accordance with the standards ISO 7196:1995 and ANSI S1.42–2001 (R2011) using Brüel & Kjær Low Frequency microphones • Measurements of Building Vibration parameters using Brüel and Kjær Low Level accelerometer in accordance with the standards ISO 8041:2005 and DIN 45669-1:2010–09 • 1/3-octave frequency analysis down to 0.
Hand-held Analyzer Types 2250 and 2270 – User Manual 190 Fig.17.1 G-weighted frequency response 20.00 10.00 0.00 Gain [dB] –10.00 –20.00 –30.00 –40.00 –50.00 –60.00 –70.00 –80.00 0.1000 1.0000 10.0000 Frequency [Hz] 100.0000 10000.0000 130809 Low Frequency Option BZ-7234, together with BZ-7222, BZ-7223, BZ-7224 or BZ-7225 and a low-frequency microphone, Type 4193 or Type 4964 (possibly with Low Frequency Adaptor UC-0211, refer to Table C.
CHAPTER 17 Low Frequency Option BZ-7234 191 2) Select the Sound Level Meter, Frequency Analyzer, Logging, Logging SLM, Enh. Logging or Enh. Logging SLM project template. The project template is displayed at the top of the screen, if it does not display the correct template tap the Project Template Bar at the top of the screen and select the correct template from the drop-down menu. (See section 3.3.1 for more details on templates.) 3) Tap the Main Menu icon and select Setup.
Hand-held Analyzer Types 2250 and 2270 – User Manual 192 17.2.1 Controlling the Measurement The measurement is controlled in the same way you would control a normal Sound Level Meter measurement, using Start/Pause , Continue , Back-erase and Reset pushbuttons, see Chapter 3 for more details. Note 1: The low-frequency settings require much longer settling times of filters and detectors for correct results.
CHAPTER 17 Low Frequency Option BZ-7234 17.3 193 Building Vibration Measurements This section describes how to measure Building Vibration parameters. Building Vibration parameters are measured using Wm or Wmb filters ( Fig.17.4 Wm filters 10.00 0.00 –10.00 Gain [dB] –20.00 –30.00 –40.00 –50.00 –60.00 –70.00 –80.00 0.0100 0.1000 1.0000 10.0000 Frequency [Hz] W mb-Weighting 100.0000 1000.0000 10000.
Hand-held Analyzer Types 2250 and 2270 – User Manual 194 17.4 Setting up the Analyzer for Building Vibration Measurements 1) Connect the accelerometer to the rear socket. Brüel & Kjær recommends Accelerometer Type 8344 for low-level building vibration measurements. If it is your first time to use the microphone, it needs to be created in the transducer database (see section 5.8) and calibrated (see section 5.3). 2) Select the Sound Level Meter, Frequency Analyzer, Logging, Logging SLM, Enh.
CHAPTER 17 Low Frequency Option BZ-7234 195 10) Select Units > Engineering Unit and select No (in dB) or Yes (in m/s2). Note: If you want readouts in g instead of m/s2, set the Vibration Unit to US/UK in Preferences > Regional Settings. 11) Tap 17.4.1 to exit Setup. Controlling the Measurement The measurement is controlled in the same way you would control a normal Sound Level Meter measurement, using Start/Pause , Continue , Back-erase and Reset pushbuttons, see Chapter 3 for more details. 17.4.
Hand-held Analyzer Types 2250 and 2270 – User Manual 196 2) Select the 2-Ch. Frequency Analyzer, Logging or Enh. Logging project template. The project template is displayed at the top of the screen, if it does not display the correct template tap the Project Template Bar at the top of the screen and select the correct template from the drop-down menu. (See section 3.3.1 for more details on templates.) 3) Tap the Main Menu icon and select Setup.
CHAPTER 17 Low Frequency Option BZ-7234 197 Fig.17.7 Spectrum view with Low Frequency set to Very Low 17.5.3 Saving Results Measurements are saved and can be opened later in the same way as described for the Sound Level Meter project in Chapter 3.
198 Hand-held Analyzer Types 2250 and 2270 – User Manual
199 Chapter 18 Specifications This chapter comprises the specifications that are needed for evaluation of analyzer performance characteristics and proper use of the analyzer. Some of the applicable sound level meter standards require additional technical documentation, in particular for pattern evaluation (type approval) purposes, but have no bearing on normal use. The additional technical documentation is given in a separate Brüel & Kjær instruction manual (BE 1712).
200 Hand-held Analyzer Types 2250 and 2270 – User Manual Specifications – Hand-held Analyzer Type 2250/2270 Platform Specifications apply to Type 2250/2270 fitted with Microphone Type 4189 and Microphone Preamplifier ZC-0032 Colour Schemes: Five different – optimised for different usage scenarios (day, night, etc.
CHAPTER 18 Specifications SECURE DIGITAL SOCKET • 1 × SD socket for hardware versions 1 – 3 • 2 × SD sockets for hardware version 4 Connect SD and SDHC memory cards LAN INTERFACE SOCKET Hardware Versions 1 to 3 (Type 2270 only): • Connector: RJ45 MDI • Speed: 10 Mbps • Protocol: TCP/IP Hardware Version 4 (Types 2250 and 2270): • Connector: RJ45 Auto-MDIX • Speed: 100 Mbps • Protocol: TCP/IP INPUT SOCKET (2 - TYPE 2270 ONLY) Connector: Triaxial LEMO Input Impedance: 1 M Direct Input: Max.
Hand-held Analyzer Types 2250 and 2270 – User Manual 202 WEIGHT AND DIMENSIONS 650 g (23 oz.) including rechargeable battery 300 93 50 mm (11.8 3.7 1.9) including preamplifier and microphone User Interface USERS Multi-user concept with login.
CHAPTER 18 Specifications Analysis DETECTORS Parallel detectors on every measurement: A- or B-weighted (switchable): Broadband detector channel with three exponential time weightings (Fast, Slow, Impulse), one linearly averaging detector and one peak detector C- or Z-weighted (switchable): As for A- or Bweighted Overload Detector: Monitors the overload outputs of all the frequency weighted channels MEASUREMENTS FOR SOUND INPUT X = frequency weightings A or B Y = frequency weightings C or Z V = frequency we
204 Hand-held Analyzer Types 2250 and 2270 – User Manual SAMPLING FOR STATISTICS The Statistics can be based on either LXF, LXS or LXeq: • Statistics LXFN1-7 or LXSN1-7 are based on sampling LXF or LXS, resp., every 10 ms into 0.2 dB wide classes over 130 dB • Statistics LXN1-7 are based on sampling LXeq every second into 0.2 dB wide classes over 130 dB Full distribution saved with measurement The Std.Dev.
CHAPTER 18 Specifications ACOUSTIC Using Sound Calibrator Type 4231 or custom calibrator.
206 Hand-held Analyzer Types 2250 and 2270 – User Manual Linear Operating Range: In accordance with IEC 61260, 1/3-octave: 20.5 to 140 dB SAMPLING FOR OCTAVE OR 1/3-OCTAVE STATISTICS X = frequency weightings A or B The Statistics can be based on either LXF or LXS: • Statistics LXFN1-7 or LXSN1-7 are based on sampling LXF or LXS, respectively, every T ms into 1 dB wide classes over 150 dB; T = 100 for frequency range set to 12.5 – 20 kHz T = 200 for frequency range set to 6.
CHAPTER 18 Specifications TRIGGERS Markers can be set and signal recordings can be started (license for BZ-7226 required) when a broadband level is above or below a specified level ANNOTATIONS On-line annotations with spoken comments, written notes or images (Type 2270 only) Calibration CHARGE INJECTION CALIBRATION (CIC) Injects an internally generated electrical signal in parallel with the microphone diaphragm.
Hand-held Analyzer Types 2250 and 2270 – User Manual 208 Software Specifications – Signal Recording Option BZ-7226 Signal Recording Option BZ-7226 is enabled with a separate license.
CHAPTER 18 Specifications CORRECTION FILTERS For Microphone Types 4189, 4190, 4191, 4193, 4950, 4952, 4952+EH-2152, 4955-A, 4964 and 4184-A, BZ7227 is able to correct the frequency response to compensate for sound field and accessories Broadband Measurements DETECTORS A- and C-weighted broadband detectors with F exponential time weighting Overload Detector: Monitors the overload outputs of all the frequency weighted channels MEASUREMENTS LAF and LCF for Display as Numbers or Quasianalogue Bars MEASURING R
210 Hand-held Analyzer Types 2250 and 2270 – User Manual Measurement Display and Control OVERVIEW MAP Map of Source and Receiver positions with reverberation time readout for a selectable frequency band on each measurement position together with quality indicator Organisation of Source and Receiver Positions: measure at all receiver positions for each source or measure in a number of positions (1 to 10) for each source Source and Receiver positions can be added, moved or deleted OVERVIEW TABLE Table of me
CHAPTER 18 211 Specifications ELECTRICAL Uses internally generated electrical signal combined with a typed-in value of microphone sensitivity CALIBRATION HISTORY Up to 20 of the last calibrations made are listed and can be viewed on the analyzer Signal Monitoring Input signal A-, C- or Z-weighted can be monitored using an earphone/headphones connected to the headphone socket Headphone Signal: Input signal can be monitored using this socket with headphones/earphones Gain Adjustment: –60 dB to 60 dB Anno
212 Hand-held Analyzer Types 2250 and 2270 – User Manual MEASURING RANGES The full level measuring range is covered in two range settings: High Range for the least sensitive range and Low Range for the most sensitive range When using Microphone Type 4189: Broadband Analysis Dynamic Range: From typical noise floor to max. level for a 1 kHz pure tone signal, A-weighted: • High Range: 28.5 to 140 dB • Low Range: 16.
CHAPTER 18 Specifications SAMPLING RATE AND PRE-RECORDING FOR 2-CHANNEL RECORDING Maximum Maximum Sampling Pre-recording (s) Pre-recording (s) Memory Memory Rate (KB/s) (KB/s) 16-bit 24-bit (kHz) 16-bit 24-bit HW 1 – 3 HW G4 HW 1 – 3 HW G4 8 50 230 30 150 32 16 20 110 10 70 64 48 96 24 10 70 3 43 96 144 48 0 30 NA 16 192 288 Software Specifications – Tone Assessment Option BZ-7231 LICENSE Tone Assessment Option BZ-7231 is enabled with a separate license and can be used with the F
214 Hand-held Analyzer Types 2250 and 2270 – User Manual SETUP ACCORDING TO STANDARD Setups in violation of the standard are indicated as such on the display. You can then accept to apply the default setup. Tone assessment will be made if possible, in spite of standard violations.
CHAPTER 18 Specifications Building Vibration Specifications for Building Vibration parameters apply to Type 2250/2270 fitted with an accelerometer. Standards Conforms with the following International Standards: • ISO 8041:2005 • DIN 45669-1:2010–09 Analysis DETECTORS Wm-weighted or Wmb-weighted detectors run in parallel with the Linear weighted broadband detectors. Wmb is the band-limiting part of the Wm weighting.
216 Hand-held Analyzer Types 2250 and 2270 – User Manual DATA MANAGEMENT Explorer: Facilities for easy management of analyzers, Users, Jobs, Projects and Project Templates (copy, cut, paste, delete, rename, create) Data Viewer: View measurement data (content of projects) Synchronisation: Project Templates and Projects for a specific user can be synchronised between PC and Type 2250/2270 USERS Users of Type 2250/2270 can be created or deleted EXPORT FACILITIES Excel: Projects (or user-specified parts) can
CHAPTER 18 Specifications Hand-held Analyzer with Sound Level Meter Software BZ-7222, Frequency Analysis Software BZ-7223 and Logging Software BZ-7224 Type 2270-E Hand-held Analyzer with Sound Level Meter Software BZ-7222, Frequency Analysis Software BZ-7223, Enhanced Logging Software BZ-7225 and Signal Recording Software BZ-7226 Included with Hand-held Analyzer Type 2250/2270: • Microphone: – Type 4189: 1/2Prepolarized Free-field Microphone or – Type 4190: 1/2Free-field Microphone • ZC-0032: Microphon
218 Hand-held Analyzer Types 2250 and 2270 – User Manual MEASURING WITH REVERBERATION TIME SOFTWARE BZ-7227 Type 2734-A Power Amplifier* Type 2734-B Power Amplifier with built-in UL-0256 Wireless Audio System* UL-0256 Wireless Audio System* Type 4292-L OmniPower Sound Source* KE-0449 Flight Case for Type 4292-L* KE-0364 Tripod Carrying Case for Type 4292-L Type 4224 Sound Source* Type 4295 Omnidirectional Sound Source* KE-0392 Carrying Case for Type 4295* AO-0523-D-100 Cable from Type 2250/2270 to Power A
CHAPTER 18 Specifications Compliance with Standards The CE marking is the manufacturer's declaration that the product meets the requirements of the applicable EU directives RCM mark indicates compliance with applicable ACMA technical standards – that is, for telecommunications, radio communications, EMC and EME China RoHS mark indicates compliance with administrative measures on the control of pollution caused by electronic information products according to the Ministry of Information Industries of the Peo
220 Hand-held Analyzer Types 2250 and 2270 – User Manual
221 Appendix A Setup Parameters This appendix describes all the setup parameters included in a template. For 2-channel setup, some parameters are doubled – one for Ch.1 and one for Ch.
Hand-held Analyzer Types 2250 and 2270 – User Manual 222 A.1 Input Table A.1 Input parameters Parameter Input Channel Values Ch. 1 Ch. 2 * Loudness Free-field Diffuse-field Auto Trigger Input† None MATRON Handswitch Comment Determines whether Input Ch. 1 or Input Ch. 2 is used for the measurement. (Available in Type 2270 1-channel templates only) Determines whether Loudness and Loudness Level are calculated based on Free-field or Diffuse-field conditions.
APPENDIX A Setup Parameters Table A.1 (Cont.) Input parameters Parameter Input Values Top Socket Rear Socket Sound Field Correction Free-field Diffuse-field Windscreen Auto Detect On Off Windscreen Correction None UA-1650 UA-1404 Range Setting Low Range High Range *. Requires Frequency Analysis Software BZ-7223 †. Not available in Reverberation Time Software BZ-7227 Comment Determines whether the input is taken from the Top socket or the Rear socket ('Input' on connector panel).
Hand-held Analyzer Types 2250 and 2270 – User Manual 224 A.2 Frequency Settings Table A.2 Frequency Setting parameters* Parameter Low Frequency Option Values Off On * Low Frequency Normal Extended Very Low Comment Set to ON to enable the Low Frequency setting, Very Low, and the G and Wm frequency weightings. Requires Low Frequency Option BZ-7234. Use this parameter to extend the low frequency of the broadband measurements and the frequency analysis.
APPENDIX A Setup Parameters (Cont.) Frequency Setting parameters* Table A.2 Parameter Values Microphone: X C Z G Broadband Peak Accelerometer: Linear Linear, Wm Linear, Wmb Comment One broadband peak parameter Lpeak is measured, select the frequency weighting here. Note: X = frequency weighting A or B. ‘A’ requires that the Broadband (excl. Peak) parameter is set to AC or AZ. ‘B’ requires that the Broadband (excl.
Hand-held Analyzer Types 2250 and 2270 – User Manual 226 A.3 Statistics Statistics parameters (available for microphone input only)* Table A.3 Parameter Broadband Statistics based on Values LXeq LXF LXS Spectral Statistics based on† LXF LXS Comment The broadband statistics are based on sampling the broadband parameter LXF or LXS each 10 ms or LXeq each second. Note: X = frequency weighting A or B. ‘A’ requires that the Broadband (excl. Peak) parameter is set to AC or AZ.
APPENDIX A Setup Parameters A.4 Measurement Control – for BZ-7222 to BZ-7225 Table A.
228 Hand-held Analyzer Types 2250 and 2270 – User Manual Table A.4 (Cont.) Measurement Control parameters – for BZ-7222 to BZ-7225 Parameter Values Comment T for LXeq,T,mov 00:01:00 to 01:00:00 Sets the averaging time T (in minutes) of the moving LAeq and moving LCeq. When the averaging time T has elapsed the LAeq,T,mov and LCeq,T,mov parameters will contain the LAeq and LCeq of the latest T minutes – updated every second. in addition, you also have Leq,T,mov = LCeq,T,mov – LAeq,T,mov.
APPENDIX A Setup Parameters A.5 Measurement Control – for Reverberation Time Software BZ-7227 Table A.5 Measurement Control parameters – for Reverberation Time Software BZ-7227 Parameter Map Based Measurement Values No Yes Meas. All Pos. for Each Source No Comment If Map Based Measurement = Yes you can define the source positions and receiver positions graphically on a map – otherwise the measurements are just numbered from position number one (Pos.
230 Hand-held Analyzer Types 2250 and 2270 – User Manual Table A.5 (Cont.) Measurement Control parameters – for Reverberation Time Software BZ-7227 Parameter Excitation Values Impulsive Interrupted Noise Comment Select Impulsive to excite the room with an impulse. The analyzer triggers on the impulse, measures the impulse as a sequence of spectra with 5 ms intervals, and finally backwardly integrates the measurements to decay curves.
APPENDIX A Setup Parameters A.6 Logged Broadband (100 ms) Table A.6 Logged Broadband (100 ms) parameters* Parameter Single channel: Parameter 1 to Parameter 3 2-channel templates (2270 only): Parameter 1 to Parameter 4 Values Microphone: LAeq, LAF, LAS, Off Comment The selected parameter(s) will be logged every 100 ms. LAeq or Linear will have an averaging time of 100 ms. Accelerometer or Direct: Linear, Fast Inst, Slow Inst, Off *.
232 Hand-held Analyzer Types 2250 and 2270 – User Manual Table A.7 (Cont.) Logged Broadband parameters* Parameter Parameter 1 to Parameter 10 Values Microphone: LXeq LYeq LCeq–LAeq LAeq,T1,mov LAeq,T2,mov LCeq,T1,mov LCeq,T2,mov Leq,T1,mov Leq,T2,mov LGeq LG10max LG10min LXE LYE LVpeak LXFmax LXSmax LXImax LYFmax LYSmax LYImax LXFmin LXSmin LXImin LYFmin LYSmin LYImin LXIeq LYIeq LAIeq–LAeq LAFTeq LAFTeq–LAeq LavUQ SIL PSIL SIL3 LWeq(f1-f2) Overload Trig. Input Voltage Wind Dir. avg. Wind Dir. min.
APPENDIX A Setup Parameters Table A.7 (Cont.) Logged Broadband parameters* Parameter (Cont.) Parameter 1 to Parameter 10 Values Comment Amb. Temperature Amb. Humidity Amb. Pressure Amb. Rain Gauge Accelerometer: Linear Peak Fast max Slow max Fast min Slow min Linear(f1-f2) Overload Trig. Input Voltage aW/LW aWCrest MTVV KBFmax KBFTm PeakW Linear: Peak Fast max Slow max Fast min Slow min Linear(f1-f2) Overload Trig. Input Voltage *. For Logging (BZ-7224) and Enhanced Logging (BZ-7225) templates only.
Hand-held Analyzer Types 2250 and 2270 – User Manual 234 Table A.8 (Cont.) Logged Spectrum parameters* Parameter Values Microphone: LXeq LXFmax LXSmax LXFmin LXSmin Off Spectrum 1 to Spectrum 3 Accelerometer: Linear / aW Fast max Slow max Fast min Slow min Off Comment These parameters can be set if Spectrum Parameters = Selected X = frequency weightings A, B, C, Z or G (controlled by Setup > Frequency Settings > Spectrum parameter) Note: The parameter values shown are for single-channel templates.
APPENDIX A Setup Parameters Table A.9 (Cont.) Markers* Parameter Values Comment Marker 6 Text string Default set to ‘Sound’. This marker is set if a signal recording is made during a measurement Pre-marker Time 0 to 5 s Specifies number of seconds marker 1, marker 2 or marker 3 will be set ahead of the point where the Back-erase or the Manual Event pushbuttons are pressed or the level trigger conditions are fulfilled *. For Logging (BZ-7224) and Enhanced Logging (BZ-7225) templates only. A.
236 Hand-held Analyzer Types 2250 and 2270 – User Manual Table A.10 (Cont.
APPENDIX A Setup Parameters Table A.10 (Cont.) Level Trigger parameters* Parameter (Cont.) Trigger Parameter Values Comment Accelerometer: Linear Peak Fast max Slow max Fast min Slow min aW/LW KBFmax PeakW Direct: Linear Peak Fast max Slow max Fast min Slow min *. For Logging (BZ-7224) templates only. †. Requires license for Signal Recording BZ-7226. A.11 Triggers Table A.
Hand-held Analyzer Types 2250 and 2270 – User Manual 238 Table A.11 (Cont.) Trigger parameters* Parameter Level Trigger 1 Trigger Values Comment †‡ On Off Set to On for setting Marker 3 (Level) when the Trigger Parameter fulfils the Level Trigger conditions (see below). The conditions are checked every second.
APPENDIX A Setup Parameters Table A.11 (Cont.) Trigger parameters* Parameter Values Comment Stop Duration 0 to 420 s Stop trigger conditions are fulfilled when level crosses Stop Level (in accordance with Start Slope) for at least Stop Duration seconds – set Stop Duration here. The Stop Duration will be limited by the internal recording buffer size and the Recording Quality and Resolution (Table A.
240 Hand-held Analyzer Types 2250 and 2270 – User Manual Table A.11 (Cont.) Trigger parameters* Parameter (Cont.) Trigger Parameter Values Accelerometer: Linear Peak Fast max Slow max Fast min Slow min Linear(F1-F2) aW / LW KBFmax PeakW Comment f1 = Lower freq. range (controlled by Setup > Frequency Settings > Bottom F. for Special Leq parameter) f2 = Upper freq. range (controlled by Setup > Frequency Settings > Top Freq.
APPENDIX A Setup Parameters A.13 Signal Recording Table A.
242 Hand-held Analyzer Types 2250 and 2270 – User Manual Table A.13 (Cont.) Signal Recording parameters* Parameter Values Comment Set to All Events to record while any of the events above are active, however, take Maximum and Minimum Duration into account (Cont.
APPENDIX A Setup Parameters Table A.13 (Cont.) Signal Recording parameters* Parameter Automatic Gain Control Values † On Off Comment To ease identification of sound sources, the gain can be automatically adjusted to keep the average level within a 40 dB range. When playing back the recorded signal, you will then hear clearly the whole signal content, whether the level has been 20 dB or 140 dB. Set Automatic Gain Control to On to convert the recorded signal. The recorded signal is stored as a 16-bit .
244 Hand-held Analyzer Types 2250 and 2270 – User Manual Table A.13 (Cont.) Signal Recording parameters* Parameter Values † Comment 0 to 470 s Recording is started the Pre-recording Time before the trigger conditions are fulfilled (for example, 5 s means the recording will be started 5 s before you hit the Manual Event pushbutton). This is possible because the recording is done continuously in an internal buffer, ready to be saved as a wave file.
APPENDIX A Setup Parameters A.14 Output Socket Signal Table A.14 Output Socket Signal parameters* Parameter Source Values Microphone: Off Input X-weighted Input C-weighted Input Z-weighted LXF DC Voltage Generator Accelerometer and Direct: Comment Output to the Output socket on the connector panel. Select between Off and the input signal for monitoring purposes. The LAF setting will output the X-weighted sound level as a voltage between 0 V and 4 V.
246 Hand-held Analyzer Types 2250 and 2270 – User Manual A.15 Lden Periods Table A.
APPENDIX A Setup Parameters Table A.16 (Cont.) Occupational Health Parameters* Parameter Values Comment Criterion Level 0 to 140 dB Criterion Level is the sound level allowed for an 8-hour period and would yield a 100% dose. The criterion level must be set according to the legislation with which you will have to comply. Used for calculation of Dose, ProjDose, DoseUQ, ProjDoseUQ.
248 Hand-held Analyzer Types 2250 and 2270 – User Manual A.17 Generator Table A.17 Generator Parameters* Parameter Generator Type Values Internal Comment Set to Internal to use the internal noise generator as specified below. External Set to External to switch an external generator on/off using a logic signal: On = 4.5 V; Off = 0 V. The generator signal appears at the Output Socket.
APPENDIX A Setup Parameters Table A.17 (Cont.
250 Hand-held Analyzer Types 2250 and 2270 – User Manual Table A.18 (Cont.) Post-processing Parameters* Parameter Wide Band RT Bottom Values 50 Hz to Wide Band RT Top Wide Band RT Top Wide Band RT Bottom to 10 kHz *. Requires Reverberation Time Software BZ-7227.
APPENDIX A Setup Parameters A.19 Tone Assessment Table A.19 Tone Assessment Parameters* Parameter Tone Assessment Values On Off Tone Standard ISO 1996:2-2007 Comment Set Tone Assessment to On to enable tone assessment functionality, then select the Tone parameter above the spectrum to display the results Set the Tone Standard in accordance with your requirements: DM 16-03-1998 ISO 1996:2-2007, Annex D is the objective method for assessing the audibility of tones in noise – simplified method.
252 Hand-held Analyzer Types 2250 and 2270 – User Manual Table A.19 (Cont.) Tone Assessment Parameters* Parameter Values Level Difference Low 0.1 to 100.0 dB Set the required level difference for detecting a tone in the low frequency range. Default is 15 dB Note: Only available if Tone Standard parameter is set to ISO 1996:2-2007 Level Difference Middle 0.1 to 100.0 dB Set the required level difference for detecting a tone in the middle frequency range.
253 Appendix B Measurement Parameters This appendix describes the measurement parameters. They are measured in accordance with the setup parameters.
Hand-held Analyzer Types 2250 and 2270 – User Manual 254 B.1 Total Measurement (Microphone Input) B.1.
APPENDIX B Measurement Parameters Minimum Time-weighted Sound Levels • LXFmin • LXSmin • LXImin • LYFmin • LYSmin • LYImin ISO/EU Occupational Health Parameters • E • Dose • ProjDose • #VPeaks (>xxx dB) • #VPeaks (>137 dB) • #VPeaks (>135 dB) US Occupational Health Parameters • LavRQ • TWA • TWAv • DoseRQ • ProjDoseRQ General Parameters • Overload in % • Start time (common to both channels in 2-channel templates) • Stop Time (common to both channels in 2-channel templ
256 Hand-held Analyzer Types 2250 and 2270 – User Manual Noise Indicators* • Lday • Levening • Lnight • Lden • Ldn Statistics to Calculate Percentile Levels and Std.Dev. Low-frequency Parameters (requires Low Frequency Option BZ-7234) • LGeq • LG10max • LG10min • LGpeak • TGpeak • #GPeaks (>xxx dB) • #GPeaks (>137 dB) • #GPeaks (>135 dB) Weather Data (requires connection to a weather station; common to both channels in 2-channel templates) • Wind Dir. avg. • Wind Dir. min.
APPENDIX B Measurement Parameters 257 CIC Results • CIC 1 Result* • CIC 1 Dev. from Reference* • CIC 2 Result* • CIC 2 Dev. from Reference* • CIC 3 Result† • CIC 3 Dev. from Reference† • CIC 4 Result† • CIC 4 Dev. from Reference† In addition to the parameters saved within the data (listed above), the following can be inserted in a project annotation as a GPS Note: • Position as Latitude and Longitude • Altitude • Position error (dependant on type of GPS unit) B.
258 Hand-held Analyzer Types 2250 and 2270 – User Manual Maximum Time-weighted Sound Levels • LXFmax • LXSmax • LXImax • LYFmax • LYSmax • LYImax Minimum Time-weighted Sound Levels • LXFmin • LXSmin • LXImin • LYFmin • LYSmin • LYImin ISO/EU Occupational Health Parameters • E • Dose • ProjDose • #VPeaks (>xxx dB) • #VPeaks (>137 dB) • #VPeaks (>135 dB) US Occupational Health Parameters • LavRQ • TWA • TWAv • DoseRQ • ProjDoseRQ General Parameters • Overload i
APPENDIX B Measurement Parameters 259 Special Parameters • LXIeq (also called LXIm) • LYIeq • LAIeq – LAeq • LAFTeq (also called LAFTm5) • LAFTeq – LAeq • SIL (average of LZeq octave band levels: 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz)* • PSIL (average of LZeq octave band levels: 500 Hz, 1000 Hz and 2000 Hz)* • SIL3 (average of LZeq octave band levels: 1000 Hz, 2000 Hz and 4000 Hz)* • LWeq(f1 – f2) (sum of power values for LWeq frequency bands from f1 Hz to f2 Hz)* Statistics to Calculate
Hand-held Analyzer Types 2250 and 2270 – User Manual 260 Spectrum Parameters* • LWeq • LWFmax • LWSmax • LWFmin • LWSmin The Statistics can be logged in Periodic Reports to Calculate Percentile Levels as spectra.* B.3 Logged Measurement (Microphone Input) B.3.
APPENDIX B Measurement Parameters Minimum Time-weighted Sound Levels • LXFmin • LXSmin • LXImin • LYFmin • LYSmin • LYImin US Occupational Health Parameters • LavRQ Special Parameters • LXIeq (also called LXIm) • LYIeq • LAIeq – LAeq • LAFTeq (also called LAFTm5) • LAFTeq – LAeq • SIL (average of LZeq octave band levels: 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz)* • PSIL (average of LZeq octave band levels: 500 Hz, 1000 Hz and 2000 Hz)* • SIL3 (average of LZeq octave band levels: 10
Hand-held Analyzer Types 2250 and 2270 – User Manual 262 Weather Data (requires connection to a weather station; common to both channels in 2-channel templates) • Wind Dir. avg. • Wind Dir. min. • Wind Dir. max. • Wind Speed avg. • Wind Speed min. • Wind Speed max. • Amb. Temperature • Amb. Humidity • Amb. Pressure • Amb.
APPENDIX B Measurement Parameters B.
Hand-held Analyzer Types 2250 and 2270 – User Manual 264 B.5.1 Processed Parameters for Display Only (Microphone Input) The following general parameter is available for display for Total data: Time Remaining (for the current measurement, taking available disk space into account). The following ISO/EU Occupational Health Parameters are calculated and displayed for Total, Periodic Reports and Logged data: Lep,d and Lep,d,v If Statistics are available, then Std.Dev.
APPENDIX B Measurement Parameters 265 Maximum Time-weighted Levels • Fast max • Slow max Minimum Time-weighted Levels • Fast min • Slow min General Parameters • Overload in % • Start time (common to both channels in 2-channel templates) • Stop Time (common to both channels in 2-channel templates) • Elapsed Time (excl.
Hand-held Analyzer Types 2250 and 2270 – User Manual 266 B.6.
APPENDIX B Measurement Parameters B.6.
Hand-held Analyzer Types 2250 and 2270 – User Manual 268 B.6.4 Logged (100 ms) Measurement (Accelerometer or Direct input) For Logging Software BZ-7224 and Enhanced Logging SoftwareBZ-7225 The following Broadband parameters can be logged every 100 ms • Linear • Fast Inst • Slow Inst Note: For 2-channel templates, up to four of the six parameters from the two channels can be logged (Type 2270 only) B.6.
APPENDIX B 269 Measurement Parameters Processed Parameters for Display Only (Accelerometer or Direct input) The following general parameter is available for display for Total data: • Time Remaining (for the current measurement, taking available disk space into account) For 2-channel templates: • Single values for display: – Ch.1 – Ch.2 Linear – Ch.2 – Ch.1 Linear • Spectra for display: – Ch.1 – Ch.2 Linear – Ch.2 – Ch.1 Linear B.6.
270 Hand-held Analyzer Types 2250 and 2270 – User Manual Table B.2 Noise indicators and statistics Parameter Lday Levening Lnight Lden Ldn LXYN Sound Field Correction Windscreen Correction Low Frequency Broadband (excl.
APPENDIX B 271 Measurement Parameters Table B.3 Occupational health parameters Parameter Lep,d Lep,d,v E Dose ProjDose Sound Field Correction Windscreen Correction Low Frequency Broadband (excl.
Hand-held Analyzer Types 2250 and 2270 – User Manual 272 B.7 Reverberation Time Measurement B.7.
273 Appendix C Analyzer Parameters This appendix describes the parameters that are common to all users of the analyzer. C.1 Current Transducer Table C.1 Current Transducer parameters Parameter Values Comment Transducer (that is, connected to Top Socket) (Ch. 1 for Type 2270) Name and serial number of transducer This parameter selects which transducer is connected to the Top Socket (displayed in Setup > Input (Type 2250) or Setup > Input under Ch.
Hand-held Analyzer Types 2250 and 2270 – User Manual 274 Table C.1 (Cont.) Current Transducer parameters Parameter Values Comment Transducer (that is connected to Rear Socket or Ch. 2 of Type 2270) Name and serial number of transducer This parameter selects which transducer is used in the Rear Socket (displayed in Setup > Input (Type 2250) or Setup > Input under Ch.
APPENDIX C Analyzer Parameters Table C.2 275 (Cont.) Transducer Setup parameters (for Microphone, Accelerometer or Direct, unless stated otherwise) Parameter Values Comment 4189 4190 4191 4950 4955-A 4193 4193, UC-0211 4964 4964, UC-0211 4952 0 4952 90 4184-A 0 4184-A 90 EH-2152 0° EH-2152 90° Unknown Microphone only: If the microphone is a known type, then the rest of the parameters of the transducer are set automatically.
Hand-held Analyzer Types 2250 and 2270 – User Manual 276 Table C.2 (Cont.) Transducer Setup parameters (for Microphone, Accelerometer or Direct, unless stated otherwise) Parameter Free-field Type Values Comment Microphone only: Set to Yes for Free-field types, otherwise set to No. Set automatically for known Microphone type Yes No Capacitance Double Microphone only: Insert capacitance of microphone in pF.
APPENDIX C Analyzer Parameters Table C.3 (Cont.) Calibration History parameters Parameter Values Comment 1. Analyzer Serial No. Text string 2. Calibration date & Time YYYY-MM-DD hh:mm:ss 2. Sensitivity Double 2. Preamplifier ID No. Text string 2. User Text string 2. Input Top Socket, Rear Socket 2. Calibration Type External,Internal 2. Calibrator Serial No. Text string 2. Comment Text string 2. Analyzer Serial No. Text string : : : N.
Hand-held Analyzer Types 2250 and 2270 – User Manual 278 Table C.4 (Cont.) Calibration Setup parameters Parameter Values Comment Serial No. for Custom Sound Level Calibrator Text string Serial number will be documented in calibration history (Acceleration) Calibrator 4294 4924--002 Custom Select which calibrator to use Calibration Level (for custom Acceleration Calibrator) 0 to 1000 m/s2 Set calibration level for custom calibrator.
APPENDIX C Analyzer Parameters Table C.5 Microphone 279 (Cont.) Overview of Type 2250/2270 Microphones Application Optimised For Dynamic Range* Free-field ±1 dB Frequency Range Free-field ±2 dB Frequency Range 4193 + UC-0211 Low Frequencies 200 V Low Frequencies Free Field Diffuse Field 37.8 – 142 dB(A) 0.38 Hz – 22.4 kHz‡ 0.28 Hz – 22.4 kHz‡ 39.1 – 142 dB(Z)‡ 4950 Standard Prepolarized Free Field Diffuse Field 16.4 –140 dB(A) 4.3 Hz – 19.0 kHz† 6.3 Hz – 19.0 kHz 3.2 Hz – 20.0 kHz† 5.
280 Hand-held Analyzer Types 2250 and 2270 – User Manual Note for Microphone Type 4193 and Type 4964 Microphone Type 4193 is delivered with the Adaptor UC-0211; for Microphone Type 4964 it is ordered separately. Adaptor UC-0211 is only used when measurements are made on signals that contain components at frequencies below 1 Hz that should be included in the measurement. This is only for the Low Frequency parameter set to Very Low.
281 Appendix D Preferences This appendix describes the unique set of parameters that can be set for each user on the analyzer. D.1 Display Settings For each colour scheme select the optimum choice of brightness for the traffic light and whether the backlight for the pushbuttons should be on or off. In addition, you can also change the number of decimal places on your dB results readout Table D.
Hand-held Analyzer Types 2250 and 2270 – User Manual 282 Table D.1 (Cont.) Display settings Parameter Resolution of Readings Values Normal Extended D.2 Comment dB: Number of decimal places for values displayed: Normal, 1; Extended, 2 Engineering: Number of digits for values displayed: Normal, 3; Extended, 4 Note: This setting is for display only and has no effect on the measurement precision or resolution Power Settings Table D.
APPENDIX D Preferences D.3 Regional Settings Table D.3 Regional settings Parameter Values Comment Decimal Point . , Select your preferred decimal point Date separator – / .
Hand-held Analyzer Types 2250 and 2270 – User Manual 284 D.4 Storage Settings Table D.4 Storage Settings Parameter Auto-naming of Projects Values Comment Select Yes for automatically naming projects from the start date of the project as Year, Month, Date in the format YYMMDD, (for example, 051112 as 2005, November 12th) Yes No Select No for using the name defined in the Project Name Prefix parameter Project Name Prefix D.5 Prefix for automatically generated project name.
APPENDIX D Preferences Table D.5 (Cont.) Headphone Settings Parameter Values Comment Automatic Gain Control On Off To ease identification of sound sources, the gain can be automatically adjusted to keep the average level within a 40 dB range. When playing back the recorded signal, you will then hear clearly the whole signal content, whether the level has been 20 dB or 140 dB. Set Automatic Gain Control to On to convert the signal at the headphone output.
Hand-held Analyzer Types 2250 and 2270 – User Manual 286 D.6 Users Table D.6 Users Parameter Values Multi User D.7 Comment Enabled Set to Enabled to enable the Multi-user facility Disabled Set to Disabled if you are the only user Printer Settings Table D.7 Printer settings Parameter Printer Used Values Comment None Select None if you do not have a printer connected to the analyzer. MPS Select MPS for a Mobile Pro Spectrum thermal printer from AM-TECH.
APPENDIX D Preferences D.8 Modem/DynDNS Settings Table D.8 Modem/DynDNS settings Parameter Modem Values Disabled GPRS/EDGE/HSPA Dialup Comment Set to Disabled if you do not have a modem connected; if you have connected a modem, but only want to use the SMS facility of the modem; or, when you physically connect or disconnect the modem. Set to GPRS/EDGE/HSPA Dialup if you have a GPRS/EDGE/HSPA modem connected and you want the analyzer to be connected to the Internet.
Hand-held Analyzer Types 2250 and 2270 – User Manual 288 D.9 Network Settings Table D.9 Network settings Parameter Values Comment Location Up to 20 characters Use Location to specify a text identifying the analyzer or location of the analyzer.
APPENDIX D Preferences Table D.9 (Cont.) Network settings Parameter Values Comment Name Up to 32 characters Name (SSID) of network you want to connect to.
290 Hand-held Analyzer Types 2250 and 2270 – User Manual D.10 Notification Settings Table D.10 Notification settings Parameter Notification Values Disabled E-mail SMS Comment Set to Disabled to disable notifications. Set to E-mail to send notifications as e-mail when an alarm occurs. Set to SMS to send notifications as SMS when an alarm occurs. See section 8.
APPENDIX D Preferences Table D.10 (Cont.) Notification settings Parameter Values Comment –100.0 dB to 200.0 dB A notification is sent when the measured Ch.2 LAeq (for Microphone input) or Linear (for Acceleration and Direct input) for the latest Report Period exceeds the set Report Threshold Level 2. Only used in 2-ch Enhanced Logging. To Character string The e-mail address of the recipient of the e-mail. Example: recipient@gmail.
Hand-held Analyzer Types 2250 and 2270 – User Manual 292 Table D.10 (Cont.) Notification settings Parameter Values Comment Active No Yes Set to Yes to activate the second phone number, otherwise set to No Name Character string Name identifying second phone number Phone Number Number The number of the second SMS recipient *.
APPENDIX D Preferences D.11 Remote Access Settings Table D.11 Remote Access settings Parameter Web Server Values Disabled Enabled Comment Set Web Server to Enabled to enable display and control of the analyzer on a web page – see section 7.4. Set to Disabled to disable the web server functionality BZ-5503 Login Required Yes No Set to Yes to require user name and password for access to the instrument from BZ-5503 MPS or from the 2250/2270 SDK. Set to No for free access to the instrument.
294 Hand-held Analyzer Types 2250 and 2270 – User Manual D.12 Image Settings (Type 2270 only) Table D.12 Image settings (Type 2270 only) Parameter Image Control Values View Finder Manual Event Comment Set to View Finder to use the Viewfinder together with the Manual Event key to capture an image. The image can then be saved or rejected after capture Set to Manual Event to capture and save the image each time you press the Manual Event key D.
295 Appendix E Glossary A-weighting filter: 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.
296 Hand-held Analyzer Types 2250 and 2270 – User Manual 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.
APPENDIX E Glossary Dose, ProjDose: DoseUQ, ProjDoseUQ: The Noise Dose is the equivalent averaged A-weighted Noise Level (taking the Threshold Level into account) using Exchange Rate = 3 for an 8 hour period (reference duration) relative to the maximum allowed (the Criterion Level) – expressed in percentage. Example: If the Criterion Level is 85 dB and a person is exposed to a constant sound pressure level of 85 dB for 8 hours, then the Dose is 100%.
Hand-held Analyzer Types 2250 and 2270 – User Manual 298 Frequency: The number of pressure variations per second. Frequency is measured in hertz (Hz). The normal hearing for a healthy young person ranges from approximately 20 Hz to 20000 Hz (20 kHz). Frequency weighting: 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.
APPENDIX E Glossary LXeq,T,mov and Leq,T,mov: Moving (or sliding) X-weighted average (equivalent continuous noise level) for the latest T minutes. Updated every second during measurement. The parameter can be used to monitor the average noise level within T minutes, for example, to monitor that the noise level during a music event doesn't exceed a certain limit at any 15 minutes of observation time during the event.
Hand-held Analyzer Types 2250 and 2270 – User Manual 300 LAFTeq: Taktmaximal Mittelungspegel as defined by DIN 45641. LAFTeq has also been called LAFTm5 or LATm5F. LavUQ: Average Sound Level with Time Weighting U = F or S and Exchange Rate Q = 4, 5 or 6. This is a widely used occupational health noise parameter in the USA, corresponding to the LAeq used otherwise. LCpeak: Maximum peak sound level during a measurement. ‘C’ denotes that the C frequency weighting is used.
APPENDIX E Glossary Loudness, Loudness Level: 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 free-field. The unit is the Sone. Loudness Level = 10*log2(Loudness) + 40. The unit is the Phone. The Zwicker method of calculation of stationary loudness based on 1/3-octave measurements is described in ISO 532 -1975, Method B.
302 Hand-held Analyzer Types 2250 and 2270 – User Manual NC, NC Decisive Band: Noise Criteria is used to rate steady-state continuous noise in a room from all types of equipment, including fans, mixing boxes, diffusers, etc. The rating is determined from 1/1-octave LZeq spectra compared with NC curves (based on equal loudness curves). The NC rating is the value of the rating curve that falls entirely above the measured data. The Decisive Band is the frequency band ‘touching’ the NC curve.
APPENDIX E Glossary Table E.1 Occupational Health Setup Parameters and Associated Standards Setup Parameters OSHA MSHA DOD ACGIH ISO Criterion Level 90 90 85 85 85, 90 PeaksOver Level* 140 140 140 140 140 Exchange Rate for Lav 5 5 4 N/A N/A Weighting for Lav S S S N/A N/A *. This is user-definable – the two other ‘PeaksOver Level’ parameters are preset to 137 and 135 dB resp.
Hand-held Analyzer Types 2250 and 2270 – User Manual 304 Slow Max Maximum time-weighted acceleration or voltage level measured with Linear frequency weighting and Slow time weighting. It is the highest level occurring during the measurement time. Slow Min Minimum time-weighted acceleration or voltage level measured with Linear frequency weighting and Slow time weighting. It is the lowest level occurring during the measurement time. Sound: Any pressure variation that the human ear can detect.
APPENDIX E Glossary Underrange Immediate underrange indicates that the broadband sound level is below the lower limit of the Linear Operating Range and is indicated separately for the two selectable frequency weightings and for the two channels (Type 2270 only). Immediate underrange is only indicated on the screen. No underrange information is saved with the final result of the measurement. In case of an underrange indication (2-channel measurements, High Range only), change to Low Range.
306 Hand-held Analyzer Types 2250 and 2270 – User Manual
307 Index Symbols #CPeaks(>140dB) .................................................. 301 Numerics 1/1- or 1/3-octave Frequency Analysis .................... 109 1/3-octave Method .................................................. 167 2647-D .................................................................... 275 2-channel Option BZ-7229 ...................................... 179 4184-A .................................................. 202, 209, 278 4189.......................................
Hand-held Analyzer Types 2250 and 2270 – User Manual 308 Sound Categories ............................................. 128 Viewing or Listening to ........................................ 64 Annotations Icon ....................................................... 41 AO-0440 ..................................................................... 7 AO-0657 ................................................................... 79 AO-0697 ...................................................................
INDEX Colour Schemes........................................................ 74 Commentary Icon............................................... 41, 65 Commentary Pushbutton ..................................... 5, 27 Comments ................................................................ 65 Adding on Profiles.............................................. 128 Microphone ............................................................ 6 Compact Flash Card Slot....................................................
Hand-held Analyzer Types 2250 and 2270 – User Manual 310 Enhanced Logging Display Results ................................................. 134 Options .............................................................. 132 Set Up ............................................................... 132 With Tone Assessment ..................................... 177 Enhanced Logging Measurement Screen ............... 134 Enhanced Logging Software BZ-7225 ..............34, 101 Equivalent Continuous Sound Level .......
INDEX Stopped ............................................................... 41 Text...................................................................... 27 Transducers......................................................... 41 Windscreen Fitted/Diffuse Field........................... 41 IEC 61672–1 standard............................................... 14 Image Adding ................................................................. 28 Adding to Current Measurement.......................... 39 View .
Hand-held Analyzer Types 2250 and 2270 – User Manual 312 Logged Broadband Parameters.............................. 231 Logged Measurement Parameters Broadband Parameters ..................................... 262 Equivalent Continuous Sound Levels ............... 260 For Enhanced Logging Software...............260, 262 For Logging Software ................................260, 262 Maximum Time-weighted Sound Levels ........... 260 Minimum Time-weighted Sound Levels ............
INDEX Microphone Holder UA-1317..................................... 17 Microphone Input ........................................................ 9 Microphone Type Parameter................................... 275 Microphones Connecting Two Microphones ............................. 16 Overview for Type 2250/2270............................ 278 Mid Frequency Range ............................................. 169 Mini USB .....................................................................
314 Hand-held Analyzer Types 2250 and 2270 – User Manual Pasting Jobs/Projects ............................................... 63 Pattern Evaluation .................................................. 199 Pause Icon................................................................ 41 PC Connection ......................................................... 67 PC Icon ..................................................................... 41 PCL ....................................................................
INDEX Reset Analyzer................................................. 8, 12, 103 Button at Bottom .................................... 8, 12, 103 Measurement.................................................. 5, 42 Options .............................................................. 103 Pushbutton ..................................................... 5, 42 to Factory Default .................................. 8, 12, 103 Resolution of Readings .............................................
316 Hand-held Analyzer Types 2250 and 2270 – User Manual Shortcut Bar.............................................................. 42 Signal Recording ...................................110, 134, 137 Import .................................................................. 69 Parameters........................................................ 241 Playback............................................................ 124 Setting ............................................................... 120 Size .......
INDEX Third Check Parameter ........................................... 228 Threshold Level....................................................... 304 Time for Peak Sound Levels (TCpeak) ........................ 32 Time Remaining ...................................................... 102 Time Weighted Average (TWA)................................. 32 Time Weightings .............................................. 31, 297 Time Zone .................................................................
Hand-held Analyzer Types 2250 and 2270 – User Manual 318 Upgrading Applications............................................. 97 US Occupational Health Parameters .....255, 258, 261 USB Connection ....................................................... 67 USB Interface .........................................................6, 9 USB Stick Troubleshooting ................................................ 101 USB Type A .............................................................. 81 Socket ................
Technical Documentation Hand-held Analyzer Types 2250 and 2270 With Sound Level Meter Software BZ-7222, Frequency Analysis Software BZ-7223, Logging Software BZ-7224, Enhanced Logging Software BZ-7225, Signal Recording Option BZ-7226, Reverberation Time Software BZ-7227, 2-channel Option BZ-7229 Tone Assessment Option BZ-7231 and Low Frequency Option BZ-7234 HEADQUARTERS: Brüel & Kjær Sound & Vibration Measurement A/S · DK-2850 Nærum · Denmark Telephone: +45 7741 2000 · Fax: +45 4580 1405 · www.bksv.
