Technical Documentation Hand-held Analyzer 2250 Light With Sound Level Meter Software BZ-7130 1/1-oct. Frequency Analysis Software BZ-7131 1/3-oct. Frequency Analysis Software BZ-7132 Logging Software BZ-7133 Signal Recording Option BZ-7226 and Tone Assessment Option BZ-7231 HEADQUARTERS: Brüel & Kjær Sound & Vibration Measurement A/S · DK-2850 Nærum · Denmark Telephone: +45 7741 2000 · Fax: +45 4580 1405 · www.bksv.com · info@bksv.
Hand-held Analyzer 2250 Light with the following 2250 Light Software: Sound Level Meter Software BZ-7130 1/1-oct. Frequency Analysis Software BZ-7131 1/3-oct. Frequency Analysis Software BZ-7132 Logging Software BZ-7133 Signal Recording Option BZ-7226 Tone Assessment Option BZ-7231 User Manual Valid for all hardware versions and from software versions 4.
Safety Considerations This apparatus has been designed and tested in accordance with IEC 61010 – 1 and EN 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 .............................................................................................................. 1 How to Use this Manual ....................................................................................... 1 CHAPTER 2 Assembling Your Analyzer ................................................................................
CHAPTER 6 Data Management............................................................................................. 49 6.1 6.2 6.3 Organising Measurements................................................................................. 49 Selecting Default Measurement Job/Path.......................................................... 51 Recalling Measurements ................................................................................... 51 CHAPTER 7 Connection to PC or Smart Phone...............
CHAPTER 13 Tone Assessment Option BZ-7231 – 1/3-octave Method .......................................................................................... 117 13.1 13.2 13.3 13.4 13.5 13.6 13.7 General ............................................................................................................ Tone Assessment According to ISO 1996-2, Annex D .................................... Setting up the Analyzer....................................................................................
APPENDIX D Preferences ..................................................................................................... 167 D.1 D.2 D.3 D.4 D.5 D.6 D.7 D.8 D.9 D.10 D.11 Display Settings ............................................................................................... Power Settings................................................................................................. Regional Settings.............................................................................................
1 Chapter 1 Introduction 1.
Hand-held Analyzer 2250 Light – User Manual 2 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). 1.2.2 Beginners Before you read the rest of this manual, read Brüel & Kjær’s primer on Measuring Sound.
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 instrument’s components and the various input and output connections. This enables you to start getting familiar with the instrument, while assembling a system. This is followed by an overview of the hardware components, showing all the main configurations of the instrument and its accessories.
Hand-held Analyzer 2250 Light – User Manual 4 2.2 • A 100 Mbps LAN connector is available • A Trigger Input socket for external trigger of signal recordings • An Input socket and an Output socket (both currently not in use) Instrument Components An overview of the main instrument components is provided in Fig.2.1. The descriptions that follow refer to those components. 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 3) (Manual Event 1 Pushbutton): This allows you to manually indicate events during a measurement.
Hand-held Analyzer 2250 Light – User Manual 6 17) Tripod Mounting Thread: Use this to mount 2250 Light onto the tripod and/or tripod extension 18) Wrist Strap/Tripod Mounting Thread: Use this to attach the wrist strap to 2250 Light for added security, or use it to mount 2250 Light onto the tripod and/or tripod extension using the tripod adaptor UA-1673 19) Internal Battery Pack: Rechargeable, high-capacity Li-Ion battery pack to power 2250 Light 20) Hinged Cover: A removable plastic cover is provided, whi
CHAPTER 2 Assembling Your Analyzer 7 1) USB Interface Socket: Use the supplied Mini USB Cable AO-1476 to connect 2) Earphone Socket: Use the optional Earphones HT-0015 to connect 3) External Power Socket: Use Mains Power Supply ZG-0426 to connect and charge batteries 4) Battery Charge Indicator: An LED that indicates when the battery pack is being charged from external power. See section 2.3.
Hand-held Analyzer 2250 Light – User Manual 8 9) Secure Digital Card Slots: Insert a SD or SDHC memory card to save data 10) LAN Socket: Connect a LAN cable to synchronise measurement and setup data with a host PC over a Local Area Network 11) USB A Socket: Connect to printers or other external USB devices 2.3.3 Description of Inputs and Outputs Top Socket See item 16 in Fig.2.1. This 10-pin LEMO connector is the microphone input for the analyzer.
CHAPTER 2 Assembling Your Analyzer 9 External Power See item 3 in Fig.2.2 and Fig.2.3. 2250 Light is powered by an internal rechargeable battery pack. An indication of available charge is shown by the battery icon at the bottom of the screen. If the charge remaining is low or empty, the batteries can be recharged by connecting Mains Power Supply ZG-0426 or ZG-0429 to the ‘Ext. Power’ socket. When the power supply lead is connected, the icon will be displayed in place of the battery icon.
10 Hand-held Analyzer 2250 Light – User Manual Input and Output Sockets See items 7 and 9 in Fig.2.3. These sockets are currently not available for use. Trigger Input Socket See item 8 in Fig.2.3. This triaxial LEMO connector is used for the external trigger of signal recordings. If you want to start and stop the recording using an external device, connect it to this input. See details in Appendix A. Note: Signal recording requires a license for the BZ-7226 option.
CHAPTER 2 Assembling Your Analyzer 2.4 Hardware Setup Fig.2.4 2250 Light – hardware overview UA-0237 90 mm Windscreen 4231 Sound Calibrator 4950 Microphone ZC-0032 Microphone Preamplifier AO-0697-D-030 Microphone Ext. Cable, 3 m AO-0697-D-100 Microphone Ext. Cable, 10 m UA-1317 Microphone Holder UA-0801 Small Tripod (or UA-0587) BZ-5298 Environmental Software CD incl.
Hand-held Analyzer 2250 Light – User Manual 12 2.5 Assembling 2250 Light 2.5.1 Charging the Battery for the First Time Battery Pack QB-0061 comes charged to approximately half capacity on initial delivery. Before using your 2250 Light for the first time, it is recommended that you fully charge the battery pack, by connecting Mains Power Supply ZG-0426 (or ZG-0429) to the external power socket. It should take approximately 8 – 10 hours.
CHAPTER 2 Assembling Your Analyzer 13 To Connect: 1) Gently screw Microphone Type 4950 onto Preamplifier ZC-0032 (see items 1 and 2 in Fig.2.1). 2) Insert the male plug of the preamplifier into the top socket of the Hand-held Analyzer (see item 17 in Fig.2.1) and push gently until it snaps into position. To Disconnect: 1) To remove the preamplifier and microphone, grip the locking collar firmly and slide back, to remove the preamplifier and microphone combination from 2250 Light.
Hand-held Analyzer 2250 Light – User Manual 14 Connecting a Microphone Extension Cable There are two optionally available extension cables which are recommended for use with 2250 Light. These are: • AO-0697-D-030: 3 m long • AO-0697-D-100: 10 m long Note: Connecting a recommended microphone extension cable has no appreciable effect on the Hand-held Analyzer’s measurement and has no effect on the instrument’s calibration.
15 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. Note: A stylus is stored in a holder on the side of the instrument, see item 15 in Fig.2.1. This can be used on the touch-sensitive screen to select icons and functions during the procedures that follow.
Hand-held Analyzer 2250 Light – User Manual 16 6) When measurement has finished, press the Save pushbutton to save your data. 7) To view and organise your data, tap the Main Menu icon and select Explorer. Note: You are not required to set any measurement ranges, the analyzer has a dynamic range of more than 120 dB, from 140 dB down to the noise floor of the microphone, (if the microphone has nominal sensitivity). 3.2.
CHAPTER 3 Making Your First Measurement 3.3.2 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 instrument is already in Standby Mode (that is, from a warm start). Note: A cold start is a re-boot of the analyzer from ROM.
18 Hand-held Analyzer 2250 Light – User Manual Fig.3.2 Changing the project template 2) Tap on 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. This is because LAF is an instantaneous value, always available for display. Other parameters, such as LAeq is a measured value that needs to be averaged over a period of time and cannot be displayed before you have started a measurement using the Start/Pause pushbutton . Fig.3.
CHAPTER 3 Making Your First Measurement 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) • Yellow status indicator flashing every 5 s when you have stopped, saved the measurement and are ready to do another measurement • Yellow status indicator flashing slowly, 0.5 s on, 0.
20 Hand-held Analyzer 2250 Light – 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 Save your Measurement When you have completed your measurement, you need to save it. By default, 2250 Light 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 2250 Light also creates a project called PROJECT 001 under JOB 01.
Hand-held Analyzer 2250 Light – User Manual 22 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 002 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 Fig.3.9 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. The GPS note is headlined “Position:”, and includes the latitude and longitude. For manual entries, please enter the latitude and longitude in one of the following formats : Degrees: DD.ddddddY DD.ddddddX Example: 55.816730N 12.532855E Degrees Minutes: DD MM.mmmmY DD MM.mmmmX Example: 55 49.
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25 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 2250 Light – User Manual 26 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 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) Note: See Appendix B for a comprehensive list of all parameters.
Hand-held Analyzer 2250 Light – User Manual 28 4.2.4 Signal Recording Option BZ-7226 This option allows recording of the input signal (typically sound) in either 16-bit or 24-bit resolution during measurement. The signal recording can be controlled manually or by using an external trigger signal. The recorded signal can be played back and listened to (hardware version 4 only) using optional Earphones HT-0015.
CHAPTER 4 Getting to Know Your Analyzer 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 postprocessing functionality is available in an expanding suite of optional application modules.
Hand-held Analyzer 2250 Light – User Manual 30 Fig.4.
CHAPTER 4 Getting to Know Your Analyzer This configuration gives you immediate access to screens you need most, that is, those you will need to perform, save and document your measurements.
Hand-held Analyzer 2250 Light – User Manual 32 Transducers The Transducers screen is accessed from the Main Menu, you can view details of the transducer connected to the instrument. Details can be changed, see section 4.4.6. When you have finished viewing or updating the details, tap to return to the measurement screen. You can tap on the Calibration History link at the bottom of the transducer details and open the Calibration History screen, see Fig.4.1.
CHAPTER 4 Getting to Know Your Analyzer Fig.4.2 Project Template Typical screen when making a measurement Status field View area View tabs Shortcut bar with icons The main areas, starting at the top of the screen, are: • Project Template • Status Field • View Area (with view tabs) • Shortcut Bar Project Template Bar This bar displays the name of the Project Template, which contains all the screen settings and measurement setup for the current project.
34 Hand-held Analyzer 2250 Light – User Manual Second Line: • Measurement state represented as icons: Stopped , Running and the Paused icon • Elapsed time of the measurement • Feedback on the action of pressing the following pushbuttons: Reset Start/Pause and Save • Indication that the measurement microphone is not calibrated. In this case the word Uncal.
CHAPTER 4 Getting to Know Your Analyzer 4.4.3 Use of Pushbuttons for Controlling Measurements The design of the analyzer is such that the layout of the pushbuttons has been optimised for single-handed operation. Reset Pushbutton Use the Reset pushbutton to reset a measurement, i.e., to reset all detectors, averagers, maximum and minimum hold, etc.
Hand-held Analyzer 2250 Light – User Manual 36 4.4.4 On-screen Feedback and Traffic Light Feedback is given on screen in the Status Field, see Fig.4.2, and the Traffic Light indicates important states of the instrument, see Table 4.2: Table 4.2 Traffic Light Indications State During power-on or loading template Stopped. Ready to measure 4.4.
CHAPTER 4 Getting to Know Your Analyzer Fig.4.3 Changing parameter values Stylus Usage Tap on 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, see Fig.4.4. Fig.4.
Hand-held Analyzer 2250 Light – User Manual 38 Tap on the digits or use Up Arrow /Down Arrow to increment/decrement the number. Use Left Arrow /Right Arrow to select other digits if necessary. Press the Accept on the number keyboard to enter the number for the parameter. Tap pushbutton or tap on the number keyboard, or outside the number keyboard to cancel the change of value. Character Keyboard When activating a text value, a standard full character keyboard appears on the screen (Fig.4.5). Fig.4.
39 Chapter 5 Calibration 5.1 Introduction Calibration is an adjustment of your sound level meter to measure and display correct values. The sensitivity of the microphone 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 2250 Light – User Manual 40 Manual Calibration If no calibrator is available (or a known amplification is introduced, e.g., by analysing a tape recorded signal) then you can type the sensitivity directly into the Sensitivity field. The analyzer will be regarded as uncalibrated and the text ‘Uncal.’ will appear in the status field. Charge Injection Calibration You can check the complete measurement chain during long term measurement using Charge Injection Calibration. See section 5.7.
CHAPTER 5 Calibration that disturb the calibration, rest the assembly in a roughly horizontal position on a table or other flat surface.) Ensure that the calibrator fits snugly on the microphone. 5) Switch on the calibrator. Wait a few seconds the level to stabilise. 6) Tap the button on the screen to start the calibration. Note: Detecting level... appears on the screen as feedback.
Hand-held Analyzer 2250 Light – User Manual 42 This screen displays the following information: • Details of the last calibration: date, sensitivity, deviation from last calibration and deviation from initial calibration • The connected transducer: type and serial number Note: Select a new transducer by tapping on the Main Menu icon followed by Input) and selecting Setup, • A Calibration History link: provided to enable you to view a history of transducer and calibration settings, see below • Max.
CHAPTER 5 Calibration 5.5 Transducer Database The specifications for Microphone Type 4950 (and Preamplifier ZC-0032), which comes fitted in the top socket of the analyzer, are described on the Transducers screen. 1) Tap the Main Menu icon then Transducers to open the Transducer screen (Fig.5.4). Fig.5.4 Transducers screen 2) Tap on the transducer name/number, or select the Plus icon view the details in the database, see Fig.5.5. next to name/number, to Fig.5.
Hand-held Analyzer 2250 Light – User Manual 44 Type 4950 is the default entry. Change Microphone Type if you are using a different Type. For known microphone types, a number of parameters are automatically set. Note: For Type 4950 the parameters Nominal Sensitivity, Free-field and Capacitance are set automatically. See details in Appendix C. The analyzer can then make sound field corrections and windscreen corrections as specified in the setup.
CHAPTER 5 Calibration The automatic calibration reminder facility will pop-up a reminder approximately 2 months before your next calibration is due and keep on reminding you every week until you do one of the following actions: • Send your instrument for Accredited/Traceable Calibration and update the Last Calibration date • Check the ‘Do not ask/remind again’ checkbox in the reminder pop-up (see example in Fig.5.7) • Disable the automatic calibration reminder Fig.5.
Hand-held Analyzer 2250 Light – User Manual 46 The method is based on detection of changes in impedance at the input terminal. It was developed for monitoring of microphone channels and requires a preamplifier with a small, extremely stable, built-in capacitor which makes it possible to apply an electrical signal to the preamplifier (and microphone) input terminal.
CHAPTER 5 Calibration Fig.5.9 CIC Calibration 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.
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49 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 2250 Light – User Manual 50 Jobs can be created in the internal memory, on a Secure Digital (SD) Card, on a USB memory stick (hardware version 4 only), or for hardware versions 1 – 3, on a Compact Flash (CF) Card. 6.1.2 Navigating in Jobs A results browser, called Explorer, is used to navigate through the jobs and projects. To view all jobs and projects, tap the Main Menu icon options. A screen similar to Fig.6.1 will appear. and select Explorer from the list of Fig.6.
CHAPTER 6 Data Management To go down one level (that is, exit the Memory level), you tap on the job name (Internal Disk in this case) and select Open from the drop-down list – or you simply tap on the memory icon next to Internal Disk. Tap the icon to create a new job folder. The first job folder name will be ‘Job 01’, subsequent job folders will be labelled ‘Job 02’, ‘Job 03’, etc. You can rename the job folder name by tapping on the name and selecting rename from the drop-down list.
Hand-held Analyzer 2250 Light – User Manual 52 6.3.1 Viewing Data and Re-using Setups from Projects Use Explorer to locate the project with the setup you want to re-use, then tap on the project name and select Open from the drop-down that appears. This will stop and reset the current measurement and load the project including all setups and data. You are now using the same screens as the ones you were using just before you saved the data. Use the screens to browse the results.
53 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 2250 Light – User Manual 54 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 GPRS/EDGE/H SPA modem Modem = GPRS/EDGE/HSPA Dialup Settings in Dialup Networking. Network Settings. Possibly settings in DynDNS. see section 8.2 and 8.3. Email see section 8.
CHAPTER 7 Connection to PC or Smart Phone Using this software, measurements on the analyzer can be controlled from your PC and displayed online, using the same user interface on the PC as on the analyzer. Data transferred to the PC are organised in archives. You can view the measurement data in the archives. 7.2.
Hand-held Analyzer 2250 Light – User Manual 56 7.4 Internet Browser for Online Display and Control of the Analyzer When the analyzer is connected to a network (see Fig.7.1) you can connect to the analyzer from a PC or smart phone using an Internet browser supporting Java Scripts. Analyzer Settings You access preferences by tapping on the Main Menu icon from the list of options (the screen shown in Fig.8.1 will appear).
CHAPTER 7 Connection to PC or Smart Phone Click the View Instrument button to enter the web page for viewing the instrument only. You might be prompted for the Guest Username and Guest Password defined for the web server (see section 8.5). Click the View and Control Instrument button to enter the web page for full access to the instrument. You will be prompted for the Username and Password defined for the web server. Fig.7.2 Prompt for username and password The View Instrument Web Page Fig.7.
Hand-held Analyzer 2250 Light – User Manual 58 The View and Control Instrument Web Page Fig.7.4 shows the View and Control Instrument web page, where you have an on-line display and keyboard for full control of the instrument. The on-line display can be used for monitoring the measurement. The keyboard on the screen has the same functions as the instrument’s keyboard. Click on the display with the cursor to control the instrument as you do when tapping on the screen of the instrument. Fig.7.
59 Chapter 8 Advanced Use of Your 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 and storage settings. 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. and selecting Preferences Fig.8.1 The Preferences screen 8.1.
Hand-held Analyzer 2250 Light – User Manual 60 Fig.8.2 Display Settings screen You can select the optimum choice of brightness for the traffic light (for example, High in bright light conditions and Low in dark conditions) and you can select whether to have backlight on the keyboard, or not. In very bright lighting conditions you will not be able to see the backlight, so set it to Off to save some power. A link is also provided in Display Settings to adjust the touch-sensitive screen.
CHAPTER 8 Advanced Use of Your Analyzer – Tips and Tricks Fig.8.3 Power Settings screen Left: Hardware versions 1 – 3 Right: Hardware version 4 The backlight will be switched on as soon as you operate the instrument, either by using the keyboard or the stylus on the touch-sensitive screen. The backlight brightness will be one of the 6 levels set by tapping on the backlight icon at the bottom of the screen.
Hand-held Analyzer 2250 Light – User Manual 62 The instrument will automatically switch off when it has been in standby mode without external power for more than 30 hours. Note 1: If the instrument is powered externally the Standby After parameters are ignored and the instrument will never go to standby. However, if the instrument is left unused for more than Standby After time the Standby After setting will overrule the Backlight settings and the backlight will be switched off.
CHAPTER 8 63 Advanced Use of Your Analyzer – Tips and Tricks A selection of common languages have been provided with the user interface of the analyzer. Select the one you prefer to change it immediately. Built-in help is provided in the more commonly used languages – if your particular language is not covered, English will be chosen automatically. Select a keyboard matching the one you prefer when using your PC.
Hand-held Analyzer 2250 Light – User Manual 64 8.1.5 Headphone Settings The headphone settings allow you to control the output to the headphone socket on the connector panel. You can listen to the measured signal for monitoring purposes. Select between A/B-weighted, C-weighted or Z-weighted. (A/B-weighting is determined by setting the parameter in Setup > Frequency Settings > Broadband (excl. Peak)).
CHAPTER 8 Advanced Use of Your Analyzer – Tips and Tricks 8.2 Modem/DynDNS Settings You can use the analyzer for monitoring in remote places and control it using Measurement Partner Suite BZ-5503, via a telephone connection – wired or wireless – using suitable modems or via network connections. See the overview of possibilities in Table 7.1, in Chapter 7.
66 Hand-held Analyzer 2250 Light – User Manual When the Modem parameter is set to GPRS/EDGE/HSPA Dialup, then a connection is made using the settings in Dialup Networking. The Status parameter reflects the current status of the network connection – e.g., ‘Connected’ or ‘Disconnected’. If the connection fails, then the analyzer will try to reconnect – until it succeeds, or the Modem parameter is set to Disabled.
CHAPTER 8 Advanced Use of Your Analyzer – Tips and Tricks Compact Flash Modems The following modem has been tested: • Compact GPRS from Pretec (www.pretec.com) Compact flash modems can be inserted directly in the compact flash socket of the analyzer. 8.2.
Hand-held Analyzer 2250 Light – User Manual 68 In the analyzer you need to specify the Hostname, Username and Password and set Active to Yes in Preferences, under Modem/DynDNS settings. Each time the analyzer detects a change in the IP address it notifies DynDNS.com. Note: To avoid too much traffic at DynDNS.com, the analyzer ensures that this service doesn't allow updates of settings more frequently than every 10 minutes. So you may experience up to a 10 minute wait for DynDNS settings to update. 8.
CHAPTER 8 Advanced Use of Your Analyzer – Tips and Tricks WLAN Connection The analyzer provides a wireless LAN option using a WLAN card. Hardware version 4 accepts the following SD WLAN card: • P322 802.11abg SD WLAN from Socket Mobile (www.socketmobile.com) – Brüel & Kjær order number UL-1025 Hardware versions 1 – 3 accept the following CF LAN and WLAN cards: 8.3.2 • 10/100 Ethernet Ruggedized CF Card from Socket Mobile (www.socketmobile.
70 Hand-held Analyzer 2250 Light – User Manual Default Gateway Address to a gateway for routing to another network Selectable if Set IP Address = Manually Preferred DNS The IP address of the primary DNS server Alternate DNS The IP address of the secondary DNS server MAC Address The MAC Address of the network adaptor (LAN or WLAN) in use. MAC (Media Access Control) Address is a unique identifier assigned to the network adaptor.
CHAPTER 8 Advanced Use of Your Analyzer – Tips and Tricks 8.4 Notifications The analyzer can send you a daily status or notify you if disk space is getting low or external power has disappeared, etc. This is done via SMS or e-mail, as described in this section. The SMS/e-mail notification contains a short status report for the analyzer. This facility is especially useful if the analyzer is left for unattended monitoring. 8.4.
Hand-held Analyzer 2250 Light – User Manual 72 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 Your Analyzer – Tips and Tricks 8.4.3 Email Notifications Email notifications can be used if the analyzer is connected to a network with access to a mail server. This can typically be done if the analyzer is connected through LAN or by a GPRS/EDGE/HSPA serial modem (see section 8.2.2 and section 8.3). Go to Preferences > Notifications > E-mail and setup details for the email account under the To parameter.
Hand-held Analyzer 2250 Light – User Manual 74 Password Protection Connection to the instrument is password protected. There are two levels of protection: • Guest – for viewing only • Administrator – for viewing and controlling the instrument Username and Password Under Preferences you set the Username and Password individually for the Guest and for Administrator accounts.
CHAPTER 8 Advanced Use of Your Analyzer – Tips and Tricks 8.6.2 GPS Receivers The analyzer can be connected to the following GPS receivers: • GPS Receiver ZZ-0249 – for measurement of latitude, longitude, altitude and position error Please refer to the user manual for Noise Monitoring Terminal Type 3639-A, B and C (BE 1818) for details on how to mount and connect the GPS receiver using Utility Unit ZH-0689. • ND-100S GPS USB Dongle from Globalsat (www.globalsat.com.
Hand-held Analyzer 2250 Light – User Manual 76 8.7 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 Your Analyzer – Tips and Tricks 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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79 Chapter 9 Updating, Maintenance and Troubleshooting 9.1 How to Install New Applications Sound Level Meter Software for 2250 Light BZ-7130, 1/1-octave Frequency Analysis Software for 2250 Light BZ-7131, 1/3-octave Frequency Analysis Software for 2250 Light BZ-7132, Logging Software for 2250 Light BZ-7133, Signal Recording Option BZ-7226 and Tone Assessment Option BZ-7231are pre-installed on the analyzer. However, a valid license is required to run the software.
Hand-held Analyzer 2250 Light – User Manual 80 hardware version 1 – 3, install your preferred language (with G4 hardware, all languages are pre-installed in the analyzer). Installation requires a USB connection between BZ-5503 and the analyzer. The BZ-5503 software will clearly indicate if the new software version is an update (free of charge) or an upgrade (license fee).
CHAPTER 9 Updating, Maintenance and Troubleshooting 4) When download is complete, the measurement is paused and normal use of the instrument is prevented. Connections to the instrument are terminated and the upgrade of the instrument 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 2250 Light – User Manual 82 9.2.3 Downgrade to an Earlier Version It is possible to downgrade to an earlier version of the software: 1) Within the server address (see Fig.9.2) change the text “latest” to the desired software package, e.g., “SW22.” 2) Press Check for updates. 3) Follow the procedure described in section 9.2.1 or section 9.2.2. Note: Only the software package SW24 or newer can be downgraded to another package.
CHAPTER 9 Updating, Maintenance and Troubleshooting Problems with Storing or Recalling Data If you experience problems in storing or recalling data on memory devices, you can check and repair the integrity of the file system on the device or even re-format it, by doing the following: 1) Insert the memory device in the correct slot of the connector panel of the analyzer. 2) You will be notified that a device has been inserted – select Yes to change the default measurement path to it.
Hand-held Analyzer 2250 Light – User Manual 84 9.3.3 Battery Pack and Recalibration of Battery Charge Indicator The software keeps the capacity of the battery pack updated. Over time the total capacity of the battery pack decreases.
CHAPTER 9 Updating, Maintenance and Troubleshooting 9.3.5 Reset Options Reset Button WARNING:Unsaved data or setups will be lost when you reset the instrument. If your analyzer stops responding to pushbutton presses, or stylus taps, you can: • Reset and reboot the instrument by pressing the reset button (located on the connector panel – see in Chapter 2) with the point of the stylus If you still experience problems, try resetting your analyzer as described below.
86 Hand-held Analyzer 2250 Light – User Manual Fig.9.4 Update 2250 Light software screen c) Cancel the update by pressing any other pushbutton than the Accept pushbutton . Fig.9.5 Reset to default settings screen 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. The one originally delivered with the analyzer and one installed afterwards.
CHAPTER 9 Updating, Maintenance and Troubleshooting Fig.9.6 Restore factory firmware and settings on hardware version 4 c) Press the Accept pushbutton to restore factory firmware and settings. 2) (all hardware versions) If the instrument now functions normally, define your preferred settings in the Preferences menu, adjust the touch screen again and make necessary changes to Setup (all accessed via the Main Menu icon).
Hand-held Analyzer 2250 Light – User Manual 88 Press the Accept pushbutton 5 minutes. to update the software. This will take approximately WARNING:Do not remove the CF-card while updating the software! When the software has been updated, you will get the option of resetting to the default settings. If the problem still persists, then you should contact your local Brüel & Kjær representative. 9.4 Services at Brüel & Kjær for Type 2250 Light 9.4.
CHAPTER 9 Updating, Maintenance and Troubleshooting 9.4.6 Hardware Maintenance and Repair You can minimise the risk of unexpected costs by purchasing the hardware maintenance with a five years warranty. Minor repairs, such as those resulting from damage caused by unauthorised use of the instrument, can be performed at the same time as the instrument is being calibrated at Brüel & Kjær. This will save you time.
Hand-held Analyzer 2250 Light – User Manual 90 9.5.
91 Chapter 10 1/1- and 1/3-octave Frequency Analysis (Optional Modules) 2250 Light has two optional Frequency Analysis modules, these are: • 1/1-octave Frequency Analysis Software for 2250 Light BZ-7131 enables you to make 1/1-octave measurements and broadband sound level measurements simultaneously • 1/3-octave Frequency Analysis Software for 2250 Light BZ-7132 enables you to make 1/3-octave measurements and broadband sound level measurements simultaneously Check the About Menu to see whether you have
Hand-held Analyzer 2250 Light – User Manual 92 ANALYZER 1/1-OCTAVE (or 1/3-OCTAVE), tap on the black bar at the top of the screen and select FREQUENCY ANALYZER 1/1-OCTAVE (or 1/3-OCTAVE) from the drop-down that appears. 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)). To exit the screen, tap . Fig.10.
CHAPTER 10 1/1- and 1/3-octave Frequency Analysis (Optional Modules) 93 The Broadband view shows an instantaneous LAF readout, with associated bar graph and four measurement parameters, followed by two measurement setup parameters. (The first measurement parameter is displayed in a larger font size for better readability.) The XL View increases the size of the first parameter readout to a 4 digit, full-screen display (including decimal point).
94 Hand-held Analyzer 2250 Light – User Manual Fig.10.3 Adjusting the X-axis 3) Scale the Y-axis (left-hand vertical scale of the graphical display) by tapping on the scale and accessing the drop-down menu, see Fig.10.4. (You can also select the spectrum cursor and press the Accept pushbutton.) Fig.10.4 Scaling the Y-axis on the Spectrum display Select Auto Zoom to adjust the range of the Y-axis for best fit of the measured spectrum. Select Zoom In/Zoom Out to adjust the zoom.
CHAPTER 10 1/1- and 1/3-octave Frequency Analysis (Optional Modules) 95 Spectrum Table shows the displayed part of the spectrum in tabular form – as in Fig.10.5. at the top of the screen to select between two different Press the Table Format icon viewing formats: – Two Parameters: for displaying values from both spectra – One Parameter (wrap): for displaying values from the main spectrum only, but with the columns wrapped on the display to allow as many values as possible on the screen Fig.10.
Hand-held Analyzer 2250 Light – User Manual 96 Fig.10.6 Displaying a Noise Curve together with the LZeq spectrum For RC and NCB you also have the possibility of displaying the limit curves for Rumble and Hiss, and for Rattle and Vibration together with the 1/1-octave LZeq spectrum. 10.3.1 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.
97 Chapter 11 Logging (Optional Module) Logging Software for 2250 Light BZ-7133 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 ‘mark’ up to five different sound categories online.
Hand-held Analyzer 2250 Light – User Manual 98 Check the About menu to see whether you have the license to run the Logging module. (The About Menu is accessed from built-in help – tap on the shortcut bar, then select About.) See Chapter 9 for instructions on installing the license for the Logging Module. 11.1 Setting up the Instrument 1) Select the LOGGING 1/1-OCTAVE, LOGGING 1/3-OCTAVE or LOGGING SLM Project Template. (section 3.3.1 for more details on templates.
CHAPTER 11 Logging (Optional Module) 99 Fig.11.1 The Setup screen 5) Under the Measurement Control parameters, set the Preset Logging 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.
Hand-held Analyzer 2250 Light – User Manual 100 All markers can be controlled by the stylus in the Profile display. You can set a Pre-marker Time between 0 and 5 seconds. This will start markers 1, 2 or 3 the set number of pre-marker seconds before the point where the Back-erase pushbutton or the Manual Event pushbuttons are pressed. See section 11.3.2.
CHAPTER 11 Logging (Optional Module) 11.3.1 101 The Profile View The Profile view displays a profile of a logged broadband parameter (dB versus time). This is very convenient when marking sound categories on-line or annotating the measurement. See Fig.11.2. Fig.11.
102 Hand-held Analyzer 2250 Light – User Manual • View whether the display of the profile during the measurement is frozen or not. When is “animated” the display is being updated with new logged data during the measurement. You can freeze the display update by tapping on the icon. This also freezes the icon. Tap on the icon again to unfreeze the display • Step forwards or backwards through the logging intervals on all displays, using and .
CHAPTER 11 Logging (Optional Module) You can browse through markers using the 103 buttons in the profile. The whole, or any part of the signal recording can be played back, once or repetitively – see Chapter 12 for details. To the right of the profile, the broadband parameter LAF is displayed and updated regardless of the measurement status and the display freeze status.
Hand-held Analyzer 2250 Light – User Manual 104 If required, Measurement Partner Suite BZ-5503, Evaluator Type 7820 and Protector Type 7825 can use the markers in their calculations. Marker number 1 (the Exclude marker) will always be used as an Exclude marker, while markers 2 to 5 will be used as defined in Type 7820/7825 software. The marker names, however, will be transferred from 2250 Light. Marker 6 will be used as a sound marker.
CHAPTER 11 Logging (Optional Module) 105 To narrow a marker: 1) Tap and hold the stylus on the profile display at the position inside the marker range where you want it to stop. 2) Drag the stylus left or right to a position outside the marker range. 3) Remove the stylus from the display and a drop-down menu appears. 4) Select Delete for the marker you want to narrow from the drop-down menu. The part where the marker overlaps the gap between the two cursors will be deleted.
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107 Chapter 12 Signal Recording (Optional Module) Signal Recording Option BZ-7226 allows you to record the input signal (typically sound) in either 16-bit or 24-bit resolution during measurement. The signal recording can be controlled manually or by using an external trigger signal. The recorded sound can be played back and listened to using the optional Earphones HT-0015. Sound is recorded directly to a memory card. With hardware version 4, sound can also be recorded to a USB memory stick.
Hand-held Analyzer 2250 Light – User Manual 108 12.1.1 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 12 Signal Recording (Optional Module) 109 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. input level and down) or select Resolution = 16 bit and specify the Peak Recording Level. 9) Under Input you specify Trigger Input if you want to start the signal recording using an external trigger signal. See details in Appendix A.
Hand-held Analyzer 2250 Light – User Manual 110 12.2 With Logging Software You can use the Signal Recording facility together with the Logging Software. You can record the sound for the whole measurement period or you can record sound for controlled parts of the measurement. The recordings are attached to the profile as sound markers. The signal recordings can be controlled by the Manual Event pushbuttons, the Back-erase pushbutton, or an external trigger signal.
CHAPTER 12 Signal Recording (Optional Module) • 111 All Events, if you want to start and stop the recording based on any of the events Note: When Recording Control set to any of the events, you can limit the duration of the recording, if Duration Limit is set to On. In this case the recording will be at least Minimum Duration long, but no longer than the Maximum Duration.
Hand-held Analyzer 2250 Light – User Manual 112 elapsed; if you press it a second time after Maximum Duration has elapsed, then the recording has already stopped when Maximum Duration elapsed, and the pressing the button will have no effect on the signal recording (the Manual Event marker, however, is stopped).
CHAPTER 12 Signal Recording (Optional Module) 113 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.
114 Hand-held Analyzer 2250 Light – User Manual Fig.12.3 Playing the recording – output level pop-up When you have selected the method of play-back, a pop-up appears explaining how to adjust the output level in the headphone and how to stop the play-back.
CHAPTER 12 Signal Recording (Optional Module) 12.2.5 115 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. Signal Recordings can be input to the Brüel & Kjær PULSE Multi-Analyzer platform for further analysis – please contact your local Brüel & Kjær representative for further information.
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117 Chapter 13 Tone Assessment Option BZ-7231 – 1/3-octave Method 13.1 General Tone Assessment Option BZ-7231 includes tone assessment according to the ISO standard. 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 standard for calculating rating level.
Hand-held Analyzer 2250 Light – User Manual 118 13.2 Tone Assessment According to ISO 1996-2, Annex D When assessing noise, it is generally recognised that noise containing audible pure tones is more annoying than noise with the same A-weighted broadband level that does not contain audible tones. When assessing noise that contains tones or narrow bands of noise, an adjustment shall be added to the A-weighted time averaged level, LAeq.
CHAPTER 13 Tone Assessment Option BZ-7231 – 1/3-octave Method 119 The proposed frequency ranges and level differences between adjacent bands are: • Low frequency range: includes the 1/3-octave bands from 25 Hz to 125 Hz with a level difference for a detected tone greater than 15 dB • Middle frequency range: includes the 1/3-octave bands from 160 Hz to 400 Hz with a level difference for a detected tone greater than 8 dB • High frequency range: includes the 1/3-octave bands from 500 Hz to 10 kHz with a
Hand-held Analyzer 2250 Light – User Manual 120 Fig.13.2 Setting Tone Assessment option to On 13.3.2 Setting up a Measurement Manually ISO 1996–2, Annex D You can set the division between the Low and Middle frequency range, the division between the Middle and High frequency range, and the limits for the level differences between adjacent bands (Fig.13.3). (See Fig.13.1 for a definition of the frequency ranges and level differences.) Fig.13.3 Left: Setting the ‘Low Freq.
CHAPTER 13 Tone Assessment Option BZ-7231 – 1/3-octave Method 13.3.3 121 Setting up the Measurement using the Default Setup Select the Tone parameter above the spectrum and start the measurement by pressing the Start/Pause pushbutton . If the selected setup parameters do not comply with the selected tone assessment method, the following pop-up window will be displayed: Fig.13.4 Pop-up window for tone measurement setup check The pop-up window can be de-activated for the rest of the measurement session.
Hand-held Analyzer 2250 Light – User Manual 122 13.3.4 Signal Recording If a valid license for the Signal Recording Option BZ-7226 is present, it is possible to record the sound while measuring. (Refer to Chapter 12 for information about the Signal Recording Option.) Note: When signal recordings are to be used for re-analysis on a PC, be sure to set Automatic Gain Control parameter to Off, under the Signal Recording parameters, and set the Recording Quality parameter to High and Resolution to 24 bit.
CHAPTER 13 Tone Assessment Option BZ-7231 – 1/3-octave Method 123 Fig.13.6 The differences to the left and right of the selected frequency band are shown in the tone parameter panel – in this example, there is a 11.4 dB difference to the left and a 3.9 dB difference to the right 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.13.7.
Hand-held Analyzer 2250 Light – User Manual 124 13.5 Logging Software BZ-7133 Template The results from the tone assessment can be found in the Spectrum view of the Logging template. Tone assessment is performed for each logging period, as well as for the total measurement time, see Fig.13.8. Fig.13.8 Viewing results on the logging template Please find more information about setting up a Logging measurement in Chapter 11. 13.
CHAPTER 13 Tone Assessment Option BZ-7231 – 1/3-octave Method 125 If you have selected 1/1-octave 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 13.2 Table 13.
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127 Chapter 14 Specifications This chapter comprises the specifications that are needed for evaluation of instrument performance characteristics and proper use of the instrument. 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 manual.
Hand-held Analyzer 2250 Light – User Manual 128 Hand-held Analyzer Type 2250-L (2250 Light) Platform Specifications apply to 2250 Light fitted with Microphone Type 4950 and Microphone Preamplifier ZC-0032: Microphone SUPPLIED MICROPHONE Type 4950: Prepolarized Free-field ½ Microphone Nominal Open-circuit Sensitivity: 50 mV/Pa (corresponding to 26 dB re 1 V/Pa) ±2 dB Capacitance: 12.5 pF (at 250 Hz) MICROPHONE PREAMPLIFIER ZC-0032 Nominal Preamplifier Attenuation: 0.
CHAPTER 14 Specifications Power EXTERNAL DC POWER SUPPLY REQUIREMENTS Used to charge the battery pack in the instrument Voltage: 8–24 V DC, ripple voltage <20 mV Current Requirement: min. 1.5 A Power Consumption: <2.5 W, without battery charging, <10 W when charging Cable Connector: LEMO Type FFA.00, positive at centre pin EXTERNAL AC MAIN SUPPLY ADAPTOR Part No.: ZG-0426 Supply Voltage: 100 to 120/200 to 240 V AC; 47 to 63 Hz Connector: 2-pin IEC 320 BATTERY PACK Rechargeable Li-Ion battery Part No.
Hand-held Analyzer 2250 Light – User Manual 130 Two Levels of Protection: • Guest level: for viewing only • Administrator level: for viewing and full control of the instrument Software Specifications – Sound Level Meter Software for 2250 Light BZ-7130 Conforms with the following National and International Standards: • IEC 61672–1 (2013) Class 1 • IEC 60651 (1979) plus Amendment 1 (1993– 02) and Amendment 2 (2000–10), Type 1 • IEC 60804 (2000–10 ), Type 1 • DIN 45657 (1997–07) • ANSI S1.
CHAPTER 14 Specifications Instantaneous Weather Data: Wind Dir. Wind Speed Instantaneous GPS Data: Latitude Longitude MEASURING RANGES When using Microphone Type 4950 Dynamic Range: From typical noise floor to max. level for a 1 kHz pure tone signal, A-weighted: 16.4 to 140 dB Primary Indicator Range: In accordance with IEC 60651: A-weighted: 23.6 dB to 122.3 dB Linearity Range: In accordance with IEC 60804: A-weighted: 21.5dB to 140.
132 Hand-held Analyzer 2250 Light – User Manual GPS Annotations A text annotation with GPS information can be attached (Latitude, Longitude, Altitude and position error). Requires connection to a GPS receiver Data Management PROJECT TEMPLATE Defines the display and measurement settings.
CHAPTER 14 Specifications Software Specifications – Logging Software for 2250 Light BZ-7133 The specifications for BZ-7133 include the specifications for Sound Level Meter Software for 2250 Light BZ-7130. BZ-7133 adds: Logging Y-axis: Range: 5, 10, 20, 40, 60, 80, 100, 120, 140 or 160 dB.
Hand-held Analyzer 2250 Light – User Manual 134 Functions with BZ-7130 and BZ-7131 SAMPLING RATE AND PRE-RECORDING The signal is buffered for the pre-recording of the signal. This allows the beginning of events to be recorded even if they are only detected later.
CHAPTER 14 Specifications 135 Software Specifications – Measurement Partner Suite BZ-5503 BZ-5503 is included with 2250 Light for easy synchronisation of data between PC and 2250 Light.
136 Hand-held Analyzer 2250 Light – User Manual Ordering Information Type 2250-L-D10 Hand-held Analyzer with Sound Level Meter Software BZ-7130 Type 2250-L-D20 Hand-held Analyzer with Sound Level Meter Software BZ-7130 and 1/1-octave Frequency Analysis Software BZ-7131 Type 2250-L-D30 Hand-held Analyzer with Sound Level Meter Software BZ-7130 and 1/3-octave Frequency Analysis Software BZ-7132 Type 2250-L-D40 Hand-held Analyzer with Sound Level Meter Software BZ-7130 and Logging Software BZ-7133 Type 2250-
CHAPTER 14 Specifications Service Products MAINTENANCE 2250-L-EW 1 2250-L-MU 1 2250-L-UPG Extended Warranty, one year extension Upgrade of 2250 Light to Type 2250, performed at headquarters Upgrade of software applications to latest version ACCREDITED CALIBRATION 2250-CAI Accredited Initial Calibration of Type 2250 2250-CAF Accredited Calibration of Type 2250 2250-CTF Traceable Calibration of Type 2250 2250-TCF Conformance Test of Type 2250, with certificate Compliance with Standards CE-mark indicates c
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139 Appendix A Setup Parameters This appendix describes all the setup parameters included in a template. A.1 Input Table A.1 Input parameter Parameter Values Comment Sound Field Correction Free-field Diffuse-field Select a correction matching the sound field of your measurements. that is, you can make correct measurements in a diffuse-field using a Type 4950 free-field microphone, by selecting Diffuse-field correction.
140 Hand-held Analyzer 2250 Light – User Manual To compensate for this, use the built in windscreen correction. Table A.2 Windscreen correction parameter Parameter Values Comment Windscreen Correction None UA-0237 You can manually select a windscreen correction for Windscreen UA-0237.
APPENDIX A Setup Parameters Table A.3 (Cont.) Frequency Settings parameters Parameter Spectrum * Bandwidth† Values Comment X C Z The frequency analysis (1/1-octave or 1/3-octave) will be frequency weighted in accordance with this parameter 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. Peak) parameter is set to BC or BZ 1/1-octave Bandwidth of frequency analysis 1/3-octave Bottom F.
142 Hand-held Analyzer 2250 Light – User Manual Table A.4 (Cont.) Statistics parameters Parameter Values Comment Percentile N5 0.1 to 99.9 User-defined percentile level where the value of LXN5 is exceeded for N5% of the elapsed time Percentile N6 0.1 to 99.9 User-defined percentile level where the value of LXN6 is exceeded for N6% of the elapsed time Percentile N7 0.1 to 99.
APPENDIX A Setup Parameters Table A.5 143 (Cont.) Measurement control parameters 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.
144 Hand-held Analyzer 2250 Light – User Manual Table A.6 (Cont.) Logged broadband parameters* Parameter Parameter 1 to Parameter 10 Values LXeq LYeq LCeq–LAeq LAeq,T1,mov LAeq,T2,mov LCeq,T1,mov LCeq,T2,mov Leq,T1,mov Leq,T2,mov 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 Wind Dir. avg. Wind Dir. min. Wind Dir. max. Wind Speed avg. Wind Speed min. Wind Speed max.
APPENDIX A Setup Parameters A.6 Logged Broadband (100 ms) Logged broadband (100 ms) parameters* Table A.7 Parameter Parameter 1 to Parameter 3 Values LAeq LAF LAS Off Comment The selected parameter(s) will be logged every 100 ms. LAeq will have an averaging time of 100 ms. *. For Logging (BZ-7133) templates only A.7 Logged Spectrum Table A.
146 Hand-held Analyzer 2250 Light – User Manual A.8 Markers Table A.9 Markers* Parameter Values Comment Marker 1 Text string Default set to ‘Exclude’. This marker can be set using the stylus in the profile or the Backerase pushbutton during a measurement Marker 2 Text string Default set to ‘Event 1’. This marker can be set using the stylus in the profile or the Manual Event 1 pushbutton during a measurement Marker 3 Text string Default set to ‘Event 2’.
APPENDIX A Setup Parameters A.9 Signal Recording Table A.
148 Hand-held Analyzer 2250 Light – User Manual Table A.10 (Cont.) Signal Recording parameters* Parameter Automatic Gain Control † Values On Off Comment To ease identification of sound sources by listening, 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.
APPENDIX A Setup Parameters Table A.10 (Cont.
150 Hand-held Analyzer 2250 Light – User Manual Table A.11 (Cont.) Occupational health parameters Parameter Values Comment Threshold Level 0 to 140 dB Any sound levels below the threshold value do not contribute to the Dose measurement data. The time resolution for this calculation is 1 s for calculation of Dose and ProjDose – and 10 ms for calculation of TWA, TWAv, DoseUQ and ProjDoseUQ. Used for calculation of Dose, ProjDose, TWA, TWAv, DoseUQ, ProjDoseUQ.
APPENDIX A Setup Parameters A.11 Tone Assessment Table A.12 Tone Assessment Parameters* Parameter Tone Assessment Values On Off Comment Set Tone Assessment to On to enable tone assessment functionality, then select the Tone parameter above the spectrum to display the results Tone Standard ISO 1996:2-2007 ISO 1996:2-2007, Annex D is the objective method for assessing the audibility of tones in noise – simplified method. This method uses 1/3-octave spectra Adjustment 0.
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153 Appendix B Measurement Parameters This appendix describes the measurement parameters. They are measured in accordance with the setup parameters. Please refer to the Glossary in Appendix E for a description of the parameters.
154 Hand-held Analyzer 2250 Light – User Manual B.1 Total Measurement 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 • Stop Time • Elapsed Time (excl.
156 Hand-held Analyzer 2250 Light – User Manual Statistics to Calculate Percentile Levels and Std.Dev. Weather Data (requires connection to a weather station) • Wind Dir. avg. • Wind Dir. min. • Wind Dir. max. • Wind Speed avg. • Wind Speed min. • Wind Speed max. • Amb. Temperature • Amb. Humidity • Amb.
APPENDIX B Measurement Parameters B.2 Logged Measurement B.2.
158 Hand-held Analyzer 2250 Light – User Manual 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)* The following parameter
APPENDIX B Measurement Parameters B.3 Logged (100 ms) Measurement B.3.1 For Logging Software for 2250 Light BZ-7133 The following Broadband parameters can be logged every 100 ms B.
160 Hand-held Analyzer 2250 Light – User Manual Instantaneous Measured Spectra‡‡ B.4.1 • LWF • LWS Processed Parameters for Display Only 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 • Lep,d,v If Statistics are available, then Std.Dev.
APPENDIX B 161 Measurement Parameters Table B.2 Statistics Parameter LXYN Sound Field Correction Windscreen Correction Broadband (excl. Peak) Broadband Statistics based on Percentile N% Table B.3 Occupational Health Parameters Parameter Lep,d Lep,d,v E Dose ProjDose Sound Field Correction Windscreen Correction Broadband (excl.
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163 Appendix C Instrument Parameters This appendix describes the parameters for microphones and calibration. C.1 Current Transducer Table C.1 Current transducer parameter Parameter Values Transducer (that is, connected to Top Socket) C.
164 Hand-held Analyzer 2250 Light – User Manual Table C.2 (Cont.) Microphone setup parameters Parameter Values Comment Microphone Type 4950 4952 0° 4952 90° 4184-A 0° 4184-A 90° EH-2152 0° EH-2152 90° Unknown If microphone is a known type, then the rest of the parameters of the transducer are set automatically. Sound Field Correction and Windscreen Correction are possible for known microphone types only.
APPENDIX C Instrument Parameters C.2.2 Calibration History Table C.3 Calibration history parameters Parameter Values Comment 1. Calibration date & Time YYYY-MM-DD hh:mm:ss Initial 1. Sensitivity Double Initial mV/Pa 1. Preamplifier ID No. Text string Initial 1. User 2250 Light Initial 1. Input Top Socket Initial 1. Calibration Type External, Internal, Check Initial 1. Calibrator Serial No. Text string Initial 1. Comment Text string Initial 1. 2250 Serial No.
166 Hand-held Analyzer 2250 Light – User Manual C.3 Calibration Setup Table C.4 Calibration setup parameters Parameter Values Comment Calibrator 4231 Custom Select which calibrator to use Calibration Level (for Sound Calibrator Type 4231) 0.00 to 200.00 dB re 20 µPa The Calibration Level will be automatically calculated Calibration Level (for Custom Sound Level Calibrator) 0.00 to 200.00 dB re 20 µPa Set calibration level for custom calibrator Serial No.
167 Appendix D Preferences This appendix describes the parameters that are common to all project templates and can be set as preferences. D.1 Display Settings Table D.1 Traffic light, backlight and decimal place parameters Parameter Values Comment Traffic Light Brightness Off Low Normal High Key Backlight Off On Backlight Brightness Minimum Level 2 Level 3 Level 4 Level 5 Maximum Select backlight brightness using the backlight icon at the bottom of the screen.
168 Hand-held Analyzer 2250 Light – User Manual D.2 Power Settings Table D.2 Power settings parameters Parameter Values Comment Backlight Dim After 30 sec. After 1 min. After 2 min. After 5 min. After 10 min Never Select optimum value for full backlight on (brightness determined by Backlight Brightness) before the backlight is dimmed (if analyzer is left untouched) Turn off Backlight After 1 min. After 2 min. After 5 min. After 10 min. After 30 min.
APPENDIX D Preferences D.3 Regional Settings Table D.3 Regional settings parameters Parameter Values Comment Decimal Point . , Select your preferred decimal point Date Separator / .
170 Hand-held Analyzer 2250 Light – User Manual D.4 Table D.4 Storage Settings Storage settings parameters Parameter Values Comment Auto-naming of Projects Yes No Select Yes for automatically naming projects from the project start date as Year, Month, Date in the format YYMMDD, (for example, 051112 as 2005, November 12th) or No for using the name defined in the Project Name Prefix parameter Project Name Prefix Text string Prefix for automatically generated project name. Maximum 8 characters D.
APPENDIX D Preferences Table D.5 171 (Cont.) Headphone settings parameters 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.
172 Hand-held Analyzer 2250 Light – User Manual D.6 Printer Settings Table D.
APPENDIX D Preferences D.7 Modem/DynDNS Settings Table D.7 Modem/DynDNS settings parameters 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.
174 Hand-held Analyzer 2250 Light – User Manual D.8 Network Settings Table D.8 Network settings parameters 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.8 (Cont.) Network settings parameters Parameter Values Comment Name Up to 32 characters Name (SSID) of network you want to connect to.
176 Hand-held Analyzer 2250 Light – User Manual D.9 Notification Settings Table D.9 Notification settings parameters Parameter Values Comment Notification Disabled, E-mail, SMS Set to Disabled to disable notifications. Set to E-mail to send notifications as email when an alarm occurs. Set to SMS to send notifications as SMS when an alarm occurs. See section 8.
APPENDIX D Preferences Table D.9 (Cont.) Notification settings parameters Parameter Values Comment Account The account is typically the email address of the email used for sending the email.* Examples: myaddress@gmail.com myaddress@hotmail.com User Name The User Name is typically the email address of the email used for sending the email.* Examples: myaddress@gmail.com myaddress@hotmail.
178 Hand-held Analyzer 2250 Light – User Manual D.10 Remote Access Settings Table D.10 Remote access settings parameters Parameter Values Comment Web Server Disabled Enabled 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.
179 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. B-weighting Filter: Frequency weighting corresponding approximately to the 70 dB equal loudness curve, that is to say, the human ear’s response at medium sound levels.
180 Hand-held Analyzer 2250 Light – User Manual Our hearing covers a surprisingly wide range of sound pressures – a ratio of over a million to one. The dB scale makes the numbers manageable Dose, ProjDose: 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.
APPENDIX E Glossary DoseUQ, ProjDoseUQ: The Noise Dose is the averaged A-weighted Noise Level (taking the Threshold Level into account) with Time Weighting U = F or S and Exchange Rate Q = 4, 5 or 6 for an 8 hour period (reference duration) relative to the maximum allowed (the Criterion Level) – expressed in percentage. Example: If the Criterion Level is 90 dB and a person is exposed to a constant average sound level of 90 dB for 8 hours with Time Weighting S and Exchange Rate 5, then the DoseS5 is 100%.
182 Hand-held Analyzer 2250 Light – User Manual Frequency Weighting (contd.): A ‘C-weighting’ curve is also used, particularly when evaluating very loud or low-frequency sounds. Lp (dB) 0 A C –20 –40 –60 10 20 50 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) 000055 LAE: Sound Exposure Level – sometimes abbreviated SEL and sometimes called Single Event Level, is the Sound Exposure expressed as a level. The letter 'A' denotes that the A-weighting has been included.
APPENDIX E Glossary LAFmin: Minimum time-weighted sound level measured with A-frequency weighting and Fast time weighting. It is the lowest level of environmental noise occurring during the measurement time (time resolution is 1 s). LAF90.0: The noise level exceeded for 90% of the measurement period with A-frequency weighting and Fast time weighting. The level is based on statistical analysis of a parameter (LAF or LAS) sampled at 10 ms intervals into 0.2 dB wide classes.
184 Hand-held Analyzer 2250 Light – User Manual Lep,d,v: The Daily Noise Exposure Level for a user-defined reference period. Lep,d,v is calculated from the measured LAE and the settings of Exposure Time and Reference Time. Used, for example, for calculating a Weekly Noise Exposure Level, by setting the Reference Time to 40 h. Loudness, Loudness Level: Loudness is the subjective judgement of intensity of a sound by humans.
APPENDIX E Glossary Occupational Health Standards: Table E.1 Typical Setup Parameter settings for Occupational Health measurements in accordance with various standards: • OSHA (Occupational Safety and Health Administration) – 29 CFR 1910.95 • MSHA (Mine Safety and Health Administration) – 30 CFR 62.0 UMHRPEL • DOD (Department of Defence) – DoD Instruction 6055.
186 Hand-held Analyzer 2250 Light – User Manual RC, RC Classification: The Room Criterion Mark II is primarily a diagnostic tool for HVAC noise in spaces. The RC curve is chosen as the value of the PSIL, rounded to the nearest integer, in the range 25 RC 50. The RC classification is the combination of the Sound Quality Descriptor and the Probable Occupant Evaluation.
APPENDIX E Glossary Threshold Level: Any sound levels below the threshold level do not contribute to the Dose measurement data. For example, if you set the threshold level to 80, any sound levels below 80 dB are not taking into consideration by the instrument, when it calculates doses and time weighted averages. Used for calculation of Dose, ProjDose, TWA, TWAv DoseSQ, ProjDoseSQ.
188 Hand-held Analyzer 2250 Light – User Manual
189 Index Symbols #CPeaks(>140dB) .................................................. 184 Numerics 1/1- or 1/3-octave Frequency Analysis ..................... 91 1/1-octave Frequency Analysis Software BZ-7131 ........................................................ 27, 91 1/3-octave Frequency Analysis Software BZ-7132 ........................................................ 27, 91 1/3-octave Method .................................................. 117 4231 Sound Calibrator................................
Hand-held Analyzer 2250 Light – User Manual 190 B Back-erase Pushbutton .................................5, 35, 99 Backlight Brightness ........................................................... 61 Icon ..................................................................... 34 Settings ............................................................... 60 Backlight Brightness Parameter ............................. 167 Backlight Dim Parameter........................................ 168 Bandwidth Parameters ...
INDEX Connecting GPS Receivers .................................................... 74 Microphone Extension Cable............................... 14 Preamplifier.......................................................... 13 to Mobile/Smart Phone ........................................ 53 to PC.................................................................... 53 via Dialup ............................................................. 65 via DynDNS .........................................................
Hand-held Analyzer 2250 Light – User Manual 192 F I Fast Time Weighting ................................................ 25 FB-0679 Hinged Cover............................................... 6 Feedback............................................................34, 36 File Format ............................................................... 82 File Speed ................................................................ 82 Filter Calibration .......................................................
INDEX Internet Connection .................................................. 53 Set up Analyzer ................................................... 56 Update Software .................................................. 80 Using DynDNS..................................................... 67 via LAN or WLAN................................................. 68 View and Control Analyzer .................................. 56 ISO 1996-2, Annex D Tone Assessment Calculations .........................
Hand-held Analyzer 2250 Light – User Manual 194 M Main Menu..........................................................29, 34 Icon ....................................................................... 5 Mains Power Connected ............................................ 9 Mains Power Supply ZG-0426 ................................... 7 Maintenance............................................................. 89 Making your First Measurement............................... 15 Managing Data ...................
INDEX NCB ................................................................. 95, 184 Classification...................................................... 184 Network Connection .......................................................... 53 Settings................................................................ 68 Settings Parameters ................................... 69, 174 NMT Server Settings .............................................. 178 Noise Curve ..................................................
Hand-held Analyzer 2250 Light – User Manual 196 Processed Parameters for Display......................... 160 General ............................................................. 160 ISO/EU Occupational Health............................. 160 LWeq 1/3-octave Spectrum ............................... 160 LWeq Spectrum ................................................. 160 Statistics ............................................................ 160 Profile Overview ............................................
INDEX Screen ................................................................. 5, 32 Touch Adjustments .............................................. 60 Troubleshooting ................................................... 84 Scrolling .................................................................... 28 SD Card Slot ................................................................... 7, 9 Troubleshooting ................................................... 82 SDHC Card Slot .................................
198 Hand-held Analyzer 2250 Light – User Manual Software Downgrade .......................................................... 82 Install New........................................................... 79 Reinstalling.......................................................... 87 Update................................................................. 29 Update or Upgrade.............................................. 79 Version ................................................................
INDEX Time Weighting....................................................... 181 Parameters ........................................................ 153 Time Weighting for Lav Parameter ......................... 150 Time Weightings ....................................................... 25 Time Zone Parameter............................................. 169 Time, Clock Display .................................................. 34 Timed Measured Parameters ................................... 26 Timer Setup .
Hand-held Analyzer 2250 Light – User Manual 200 V Versions Hardware and Software ...................................... 28 View and Control Instrument .................................... 58 View Instrument........................................................ 57 Viewing Annotations ......................................................... 52 Data..................................................................... 52 Data Remotely .................................................... 29 Results ........
Technical Documentation Hand-held Analyzer 2250 Light With Sound Level Meter Software BZ-7130 1/1-oct. Frequency Analysis Software BZ-7131 1/3-oct. Frequency Analysis Software BZ-7132 Logging Software BZ-7133 Signal Recording Option BZ-7226 and Tone Assessment Option BZ-7231 HEADQUARTERS: Brüel & Kjær Sound & Vibration Measurement A/S · DK-2850 Nærum · Denmark Telephone: +45 7741 2000 · Fax: +45 4580 1405 · www.bksv.com · info@bksv.
