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Brüel & Kjær 2245 Instruction Manual

Sound level meter
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INSTRUCTION MANUAL
Type 2245
for use with Microphone Type 4966
BE 1910 - 11
English

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  • Page 1 INSTRUCTION MANUAL Sound Level Meter Type 2245 for use with Microphone Type 4966 BE 1910 – 11 English...

  • Page 3: Sound Level Meter

    Sound Level Meter Type 2245 with Microphone Type 4966 From Hardware Version 1.0 Firmware Variants: FW-2245-000 FW-2245-001 FW-2245-002 Instruction Manual BE 191011 November 2019 www.bksv.com...
  • Page 4 Health and Safety Considerations Risks and Hazards This apparatus has been designed and tested in accordance with Safety Requirements for IEC/EN 61010 – 1 and ANSI/UL 61010 – 1 Explosion Hazards Electrical Equipment for Measurement, Control and Laboratory Danger: The apparatus is not designed to be used in .
  • Page 6 Brüel & Kjær has made every effort to ensure the accuracy of the Brüel & Kjær and all other trademarks, service marks, trade names, information contained in this document. No responsibility is accepted logos and product names are the property of Brüel & Kjær or a third- for any errors or omissions herein.

  • Page 7: Table Of Contents

    Contents CHAPTER 1 Introduction..............................1 About This Manual .............................. 1 System Overview..............................2 CHAPTER 2 Short Guide to the Sound Level Meter ......................7 Introduction ................................ 7 Switching the Sound Level Meter On and Off ..................... 7 Setting Up the Sound Level Meter ........................7 Calibration .................................
  • Page 8 4.10 Detectors................................55 4.11 Spectrum Analysis ............................. 57 4.12 Influences from the Operating Environment ....................60 4.13 Wireless Interface to the Sound Level Meter ....................60 4.14 Electrical Interface to the Sound Level Meter....................62 4.15 Power Supply ..............................63 4.16 Warm-up Time ..............................

  • Page 9: Introduction

    1.1.1 Conventions Used in this Manual The term “sound level meter” is an abbreviation for “Sound Level Meter Type 2245” throughout this manual. Selectable Buttons, Values and Pages on the Screen and Command Indicated by bold type face (for example: select Enabled).

  • Page 10: System Overview

    The three firmware variants fulfil the specifications described in this manual. The FW-2245-000 variant is a superset of the other variants. The three firmware variants are identical, except for the following restrictions on FW-2245-001 and FW-2245- 002 compared to FW-2245-000: •...
  • Page 11 CHAPTER 1 Introduction Fig.1.1 B&K 2245 Sound Level Meter with Accessories in Hardshell Case Hardware overview Windscreen Sound Calibrator Phone/Tripod Storage Box UA-1650 4231 Holder KE-1034 UA-2237 Wrist Strap USB Cable Sound Level Meter DH-0819 AO-0821 B&K 2245 ½ Free-field Microphone...
  • Page 12 Sound Level Meter Type 2245 – Instruction Manual Table 1.1 Brüel & Kjær Quantity Description Hardware components Type/Part Number needed for Type 4966 Prepolarized Free-field ½ Condenser Microphone conformance testing of Sound Level Meter WA-0302-B Electrical Substitute for Microphone Type 4966, 15 pF...

  • Page 13: Block Diagram

    CHAPTER 1 Introduction 1.2.4 Block Diagram The block diagram of the sound level meter is shown in Fig.1.2. Fig.1.2 Output Block diagram of Type 2245 Amplifier Converter Wi-Fi ® USB-C™ Interface Interface Data External Interface Power Power Keyboard Supply Main...
  • Page 14 Sound Level Meter Type 2245 – Instruction Manual...

  • Page 15: Short Guide To The Sound Level Meter

    Chapter 2 Short Guide to the Sound Level Meter Introduction This chapter contains a brief guide to the use of the sound level meter. The user interface of the sound level meter has: • A screen for displaying settings, results and status •...
  • Page 16 Sound Level Meter Type 2245 – Instruction Manual 2.3.1 About Go to About to see the sound level meter's serial number, hardware version, firmware variant, and currently installed firmware version. 2.3.2 Measurement Settings The acoustical frequency response and calibration depends on the sound field, the microphone, the microphone accessories in use, and the electrical frequency response.
  • Page 17 CHAPTER 2 Short Guide to the Sound Level Meter Go to Measurement settings > Measurement control to set up how to control your measurement: • Logging mode – Select Enabled to log measurement data at every Logging interval • Logging interval – Define the logging interval when Logging mode is Enabled.
  • Page 18 Sound Level Meter Type 2245 – Instruction Manual Go to Measurement settings > Statistical parameters to select the Basis parameter for the statistics (LAeq, LAF, or LAS) and up to five percentiles. See details on statistics in section 2.14.2. Go to Measurement settings > Audio recording to enable audio recording in Listen quality (MP3 files).
  • Page 19 CHAPTER 2 Short Guide to the Sound Level Meter 2.3.4 System Settings Go to System settings to control regional settings, power settings, storage settings, network settings, and advanced service settings. Go to System settings > Regional settings > Language to select your preferred user interface language.
  • Page 20 Sound Level Meter Type 2245 – Instruction Manual Go to System settings > Data management to set up backup settings for automatic backup and data retention. Set Data retention to Automatic or Manual: When set to Automatic, data that has been transferred to the PC apps or backed up to a NAS disk/USB memory stick will automatically be moved to the sound level meter's Trash.
  • Page 21 CHAPTER 2 Short Guide to the Sound Level Meter Go to System settings > Network settings > Wi-Fi settings to connect to the Wi- Fi. Set Wi-Fi mode to: • Airplane mode to switch Wi-Fi and Bluetooth off completely • Connect to network to connect to an existing network using a Wi-Fi name and Wi-Fi password •...

  • Page 22: Calibration

    Sound Level Meter Type 2245 – Instruction Manual 2.3.5 Status Go to Status to see the Battery and Disk status. The small icon at the bottom left corner of the display gives a quick view of the battery status. This icon is on all displays.
  • Page 23 CHAPTER 2 Short Guide to the Sound Level Meter 4) Navigate to Calibration, press on the sound level meter to enter Calibration Settings and insert the Calibrator serial no. using the up/down ( / ) buttons to change the number. 5) Navigate up to Calibrate and press to start the calibration process.
  • Page 24 Switch the calibrator on and on the sound level meter press to retry the calibration. If the calibration deviates more than ±1.5 dB (±1.1 dB for firmware variant FW-2245-002) from the initial calibration, then the calibration is stopped without changing the calibration of the sound level meter.
  • Page 25 CHAPTER 2 Short Guide to the Sound Level Meter 4) Fit Sound Calibrator Type 4231 carefully onto the microphone of the sound level meter. To avoid handling vibrations that disturb the calibration, rest the assembly in a roughly horizontal position on a table or other flat surface.

  • Page 26: Measuring With The Sound Level Meter

    Sound Level Meter Type 2245 – Instruction Manual ✐ You can disable the automatic calibration check in > Please note: System settings > Advanced settings Calibration Measuring with the Sound Level Meter Before a measurement is started and after it is stopped, the sound level meter displays an instantaneous broadband measurement.

  • Page 27: Viewing Measurements

    CHAPTER 2 Short Guide to the Sound Level Meter Viewing Measurements There are several measurement displays (SLM, List, Spectrum, Profile, and About data). To navigate between them, use the buttons. ✐ while in the measurement displays to toggle the (main) parameter in the display without going Please note: into the Display settings...

  • Page 28: Viewing Saved Measurements

    Sound Level Meter Type 2245 – Instruction Manual The About data display shows the preconditions for the measurement. Viewing Saved Measurements To view saved measurements, press and in the main menu go to Data explorer.

  • Page 29: Positioning The Microphone (Sound Level Meter)

    CHAPTER 2 Short Guide to the Sound Level Meter Positioning the Microphone (Sound Level Meter) The microphone must be placed away from shielding, reflecting, or absorbing objects. In a diffuse sound field, absorbing objects will reduce the measured sound levels. In a free sound field, reflecting objects can change the measured sound levels.

  • Page 30: Measuring At Low Static Pressure

    Sound Level Meter Type 2245 – Instruction Manual Fig.2.1 Error from self- generated noise 10 11 12 13 14 15 [dB] 180207 Fig.2.1 shows the error on the measured sound levels from the presence of self-generated noise. The curve can also be used for compensation by subtracting the error from the measured sound levels.

  • Page 31: Mechanical Vibration

    CHAPTER 2 Short Guide to the Sound Level Meter Fig.2.3 Typical variation in sensitivity at 250 Hz from that at 101.3 kPa as a function of ambient pressure 120 kPa 180229 2.12 Mechanical Vibration Mechanical vibration can affect indicated levels at low levels. Section 4.12.4 gives an indication of the level of these errors.
  • Page 32 Sound Level Meter Type 2245 – Instruction Manual Table 2.1 Frequency Weightings Nominal Exact Frequency Frequency weighting (1 decimal) Frequency (6 digits) design goals (dB) (Hz) (Hz) 10.0000 –70.4 –38.2 –14.3 12.5893 –63.4 –33.2 –11.2 15.8489 –56.7 –28.5 –8.5 19.9526 –50.5...

  • Page 33: Measured Quantities

    CHAPTER 2 Short Guide to the Sound Level Meter 2.14 Measured Quantities This section gives a precise mathematical definition of the measured quantities and defines the abbreviations used in the display. 2.14.1 Instantaneous Broadband Measurements These measurements are done continuously, independent of measurement start, pause and stop. They cannot be saved and are only displayed.
  • Page 34 Sound Level Meter Type 2245 – Instruction Manual The exponential time constants are stated in Table 2.2. Table 2.2 Time Constant Averaging Time Time Weighting Exponential time (seconds) (seconds) constants and Fast 0.125 0.25 corresponding averaging times Slow Time-weighted Sound Level, I Time-weighted...
  • Page 35 CHAPTER 2 Short Guide to the Sound Level Meter Taktmaximalpegel The Taktmaximalpegel, L ), is defined as the greatest time-weighted sound level, L (t), within a time interval starting at t = T and ending at t = T +t where: •...
  • Page 36 Sound Level Meter Type 2245 – Instruction Manual Maximum Time-weighted Sound Level The maximum time-weighted sound level, L (T), is defined as the greatest time-weighted sound level, L (t), xymax within a time interval starting at t = T and ending at t = T + t where: •...
  • Page 37 CHAPTER 2 Short Guide to the Sound Level Meter Equivalent Continuous I-weighted Sound Level The equivalent continuous I-weighted sound level (also called average I-weighted sound level), L (T), is xIeq defined as ten times the logarithm to base ten of the mean of ten to the power of the I time-weighted sound level, L (t), divided by ten during a time interval.
  • Page 38 Sound Level Meter Type 2245 – Instruction Manual Sound Exposure Level The sound exposure level, L (T), is defined as ten times the logarithm to base ten of the ratio of integral of the squared sound pressure during a time interval to the reference sound exposure – sound pressure being obtained with a frequency weighting, x.
  • Page 39 CHAPTER 2 Short Guide to the Sound Level Meter Statistics Statistics can be based on sampling the continuous output of the A-weighted exponential detectors F every 16 ms, S every 125 ms or the 1-second linearly averaged results L . The samples are divided into 0.2 dB classes in which the frequency of appearance is counted.

  • Page 40: Overload And Underrange

    Sound Level Meter Type 2245 – Instruction Manual 2.15 Overload and Underrange 2.15.1 Overload Overload indicates that the input signal level exceed the capability of the sound level meter with the current settings. During measurement, overload is indicated with a flashing red triangle and a flashing red light ring.

  • Page 41: Conformance Testing

    Chapter 3 Conformance Testing Introduction This chapter contains the information needed to conduct conformance testing according to the specified standards. Microphone, Accessories and Sound Fields The acoustical frequency response and calibration depends on the sound field, the microphone, the microphone accessories in use, and the electrical frequency response. To improve the quality of the measurement and help the user to measure correctly, the sound level meter compensates for the sound field, the microphone, and the microphone accessories in use by automatically changing the electrical frequency response and calibration.

  • Page 42: Calibration During Pattern Evaluation And Periodic Tests

    Sound Level Meter Type 2245 – Instruction Manual Calibration During Pattern Evaluation and Periodic Tests For Pattern Evaluation tests (type approval) and Periodic tests, the sound level meter shall be calibrated. For Periodic tests performed by a test laboratory, it may be inappropriate to add more temporary calibrations to the customer's Calibration history.

  • Page 43: Mounting For Acoustical Tests

    CHAPTER 3 Conformance Testing Mounting for Acoustical Tests For acoustical tests, it is important that the test rig for mounting the sound level meter to be tested is designed to minimise the influence of reflections to a level that is comparatively smaller than the test parameter’s maximum expanded uncertainties of measurement.
  • Page 44 Sound Level Meter Type 2245 – Instruction Manual 3.9.1 Signal Sources for Immunity Test Acoustical Source for Testing According to IEC 61672 The acoustic signal, which is used during the immunity test according to IEC 61672, is applied to the microphone through a ½...
  • Page 45 CHAPTER 3 Conformance Testing 3.9.3 Securing of Cables During EMC Test During test, any excessive cable is folded back on itself in an even number of figure eights. The cable arrangement is common for both the emission and immunity tests. 3.9.4 Accessories Included in EMC Test The following accessories are connected to the sound level meter during the EMC tests:...
  • Page 46 Sound Level Meter Type 2245 – Instruction Manual Testing Immunity as a Sound Level Meter According to IEC 61672 The highest susceptibility (susceptibility = 1/immunity) is achieved when the sound level meter is set up as follows: 1) Make the connections described in section 3.9.4.

  • Page 47: Specifications

    The international IEC standards are adopted as European standards by CENELEC. When this happens, the letters IEC are replaced with EN and the number is retained. Type 2245 also conforms to these EN standards.

  • Page 48: Reference Environmental Conditions

    Sound Level Meter Type 2245 – Instruction Manual Reference Environmental Conditions • Air Temperature: 23 °C • Static Pressure: 101.325 kPa • Relative Humidity: 50% Reference Conditions for Acoustic Calibration • Reference Level Range: Only one level range exists and this is the reference level range •...

  • Page 49: Frequency Responses

    CHAPTER 4 Specifications Frequency Responses The frequency responses are given in tabular form in Appendix A and in graphical form in this section. The specifications for the Lin response defined in IEC 60651 are equivalent to those given here for the Z-weighting.
  • Page 50 Sound Level Meter Type 2245 – Instruction Manual Fig.4.1 Uncompensated electrical frequency response, corresponds to Table A.1 B&C 1000 10000 180208 4.6.2 Typical Low-frequency Responses The typical low-frequency responses for Z-frequency weighting are given in Fig.4.2. The electrical responses in Fig.4.2 is the low-frequency responses for introduction of the electrical signal through the recommended means to substitute the microphone with an electrical input facility (see section 3.3.2).
  • Page 51 CHAPTER 4 Specifications 4.6.3 Acoustical Frequency Responses All the acoustical frequency responses are given for Z-frequency weighting. The A-, B- and C-weighted acoustical frequency responses can be found by adding the appropriate response from the “Add to Acoustical Responses” columns of Table A.1 to the Z-weighted responses. 4.6.4 Free-field Frequency Responses The free-field frequency responses for plane progressive sinusoidal sound waves incident from the reference...
  • Page 52 Sound Level Meter Type 2245 – Instruction Manual 4.6.5 Diffuse-field Frequency Responses The diffuse-field frequency responses (also called random-incidence frequency responses) with Z-frequency weighting are provided in Fig.4.5 and Fig.4.6 and Table A.4 to Table A.5. Fig.4.5 Diffuse-field frequency response for the sound level meter. Corresponds to the “Acoustical Response” column in Table A.4...

  • Page 53: Directional Responses

    CHAPTER 4 Specifications Directional Responses This section gives directional responses for plane progressive sinusoidal sound waves normalised to the response in the reference direction. Influence of Windscreen UA-1650 is given as tables in Appendix A. Only the resulting directional responses are given here as graphs. The sensitivity variation graphs show the absolute maximum difference between the sensitivities at any two sound incidence angles within the specified interval of angles.
  • Page 54 Sound Level Meter Type 2245 – Instruction Manual Fig.4.7 Directional response for the sound level meter measured in a plane parallel to the display and along the microphone axis. Corresponds to Table A.7 to Table A.9...
  • Page 55 CHAPTER 4 Specifications Fig.4.8 Directional response for the sound level meter measured in a plane perpendicular to the display and along the microphone axis. Corresponds to Table A.10 to Table A.12...
  • Page 56 Sound Level Meter Type 2245 – Instruction Manual  Sensitivity variations for the sound level meter at sound incidence angles within ± ° from the reference direction. Corresponds Fig.4.9 to Table A.13 ± 30° 1000 10000 ± 90° 1000 10000 ±...
  • Page 57 CHAPTER 4 Specifications Fig.4.10 Directional response for the sound level meter with Windscreen UA-1650, measured in a plane parallel to the display and along the microphone axis. Corresponds to Table A.17 to Table A.19...
  • Page 58 Sound Level Meter Type 2245 – Instruction Manual Fig.4.11 Directional response for the sound level meter with Windscreen UA-1650, measured in a plane perpendicular to the display and along the microphone axis. Corresponds to Table A.20 to Table A.22...
  • Page 59 CHAPTER 4 Specifications  Sensitivity variations of the sound level meter with Windscreen UA-1650, at sound incidence angles within ± ° from the Fig.4.12 reference direction. Corresponds to Table A.23 ± 30° 1000 10000 ± 90° 1000 10000 ± 150° 1000 10000 180235...

  • Page 60: Self-Generated Noise

    Sound Level Meter Type 2245 – Instruction Manual Self-generated Noise Self-generated noise is given for nominal microphone open circuit sensitivity, with Measurement settings > Input >Sound field set to Free-field and no microphone accessories selected. Self-generated noise is measured as time-averaged sound level, L , with an averaging time of at least 30 seconds.

  • Page 61: Measuring Ranges

    CHAPTER 4 Specifications Fig.4.14 Typical self-generated noise, 1/3 octave band Microphone Electrical Total 180215 Measuring Ranges The “Upper Limit” in the following sections is based on the guaranteed worst-case limit for the sound level meter and the nominal open circuit sensitivity of the microphone. The overload limit can, due to tolerances in the sound level meter, be up to 0.6 dB higher than the Upper Limit specified in this manual, but tolerances specified in the international standards are maintained as long as no overload is indicated.
  • Page 62 Sound Level Meter Type 2245 – Instruction Manual 4.9.3 Primary Indicator Range Primary indicator range according to the international standard IEC 60651: Table 4.4 Lower Limit Upper Limit Primary indicator range A-weighting B-weighting C-weighting Z-weighting (dB) (dB) (dB) (dB) (dB) 123.6...

  • Page 63: Detectors

    CHAPTER 4 Specifications 4.9.7 Linear Operating Range The starting point for all linear operating range tests is 94.0 dB. Linear operating range according to the international standard IEC 61672-1: Table 4.8 Lower Upper Limit Linear operating range Limit Frequency Weighting 31.5 Hz 1 kHz 4 kHz...
  • Page 64 Sound Level Meter Type 2245 – Instruction Manual Response to Tone Bursts for Exponential Averaging Detectors according to IEC 60651 and DIN 45657: Table 4.10 Maximum Standards’ Analyzer Response to tone bursts Response to Test Duration of Tolerances on Tolerances on...

  • Page 65: Spectrum Analysis

    CHAPTER 4 Specifications 4.11 Spectrum Analysis Analytical Filter Design: Optimised Z-transformation of analogue Butterworth filters Base: 10 Sampling Rate: Octave-based down-sampling from 65.536 kHz Reference Attenuation: 0 dB, relative to the broadband equivalent continuous Z-weighted sound level L for a 1 kHz sinusoidal input 4.11.1 1/1-octave Band Centre Frequencies Nominal: 16 Hz, 31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16 kHz...
  • Page 66 Sound Level Meter Type 2245 – Instruction Manual Exact (5 digits): 12.589 Hz, 15.849 Hz, 19.953 Hz, 25.119 Hz, 31.623 Hz, 39.811 Hz, 50.119 Hz, 63.096 Hz, 79.433 Hz, 100.00 Hz, 125.89 Hz, 158.49 Hz, 199.53 Hz, 251.19 Hz, 316.23 Hz, 398.11 Hz, 501.19 Hz, 630.96 Hz, 794.33 Hz, 1.0000 kHz, 1.2589 kHz, 1.5849 kHz, 1.9953 kHz, 2.5119 kHz, 3.1623 kHz, 3.9811 kHz, 5.0119 kHz,...
  • Page 67 CHAPTER 4 Specifications 4.11.3 Linear Operating Range Linear operating range according to the international standard IEC 61260, for electrical input, for all filters in the filter banks: Table 4.11 Upper Limit Lower Limit 1/1-octave Lower Limit 1/3-octave Linear operating range (dB) (dB) (dB)

  • Page 68: Influences From The Operating Environment

    Sound Level Meter Type 2245 – Instruction Manual 4.12 Influences from the Operating Environment The temperature and humidity specifications are given provided that no condensation inside the sound level meter results from the combination. Excessive condensation may cause permanent damage to the instrumentation.
  • Page 69 Sound Level Meter Type 2245 incorporates a Wi-Fi / Bluetooth radio module, which has been tested to comply with European Radio Equipment directive (RED) 2014/53/EU. Sound Level Meter Type 2245 has been tested by a qualified test house, and complies with the requirements in the EN 62209-2:2010 specifications for body-worn use and for hand-held use.

  • Page 70: Electrical Interface To The Sound Level Meter

    Sound Level Meter Type 2245 – Instruction Manual Le fonctionnement est soumis aux deux conditions suivantes: 1) Cet appareil ne doit pas causer d'interférences. 2) Cet appareil doit accepter toutes les interférences, y compris celles susceptibles de provoquer un fonctionnement indésirable de l'appareil.

  • Page 71: Power Supply

    CHAPTER 4 Specifications – USB battery charging, charges the sound level meter with up to 7.5 W from a USB Type A charger and up to 15 W from a USB Type C charger – Delivers up to 2.5 W 4.14.3 Charge/Power Interface While measuring, the sound level meter is only intended to be supplied from the built-in battery or mains using...

  • Page 72: Mark Compliance

    Sound Level Meter Type 2245 – Instruction Manual 4.18 Mark Compliance • The CE marking is the manufacturer's declaration that the product meets the requirements of the applicable EU directives. For this product, this is Radio Equipment Directive 2014/53/EU • RCM mark indicates compliance with applicable ACMA technical standards – that is, for telecommunications, radio communications, EMC and EME •...
  • Page 73 CHAPTER 4 Specifications RED (Europe): Specific Absorption • 1999/519/EC: Council recommendation of 12 July 1999 on the limitation of exposure of the Rate (SAR) general public to electromagnetic fields (0 Hz – 300 GHz) • EN 62311: General RF exposure standard that effectively refers to SAR standards for devices where other assessment methods are not relevant •...
  • Page 74 Sound Level Meter Type 2245 – Instruction Manual...

  • Page 75: Tables

    Appendix A Tables Electrical Frequency Responses Uncompensated electrical frequency responses for the different frequency weightings. Please see the instructions in section 3.2.2 on how to ensure an uncompensated electrical frequency response. Table A.1 Uncompensated electrical frequency responses Electrical Add to Acoustical Exact Response Responses...
  • Page 76 Sound Level Meter Type 2245 – Instruction Manual Table A.1 (Continued) Uncompensated electrical frequency responses Electrical Add to Acoustical Exact Response Responses Nominal Frequency Frequency (6 digits) weighting weighting weighting weighting weighting weighting weighting 1258.93 0.55 –0.04 –0.08 0.02 0.57 –0.02...
  • Page 77 Tables Table A.1 (Continued) Uncompensated electrical frequency responses Electrical Add to Acoustical Exact Response Responses Nominal Frequency Frequency (6 digits) weighting weighting weighting weighting weighting weighting weighting 6309.57 –0.17 –1.94 –2.04 0.00 –0.17 –1.94 –2.04 6300 6700 6683.44 –0.38 –2.16 –2.27 0.00 –0.38...

  • Page 78: Free-Field Frequency Responses

    Sound Level Meter Type 2245 – Instruction Manual Free-field Frequency Responses Frequency responses with Z-frequency weighting. Measured with plane progressive sinusoidal sound waves incident from the reference direction and the sound level meter’s Sound Field Correction parameter set to Free- field, see section 4.6.
  • Page 79 Tables Table A.2 (Continued) Free-field 0° frequency response for the sound level meter Exact Microphone Nominal Expanded Body Expanded Electrical Acoustical Expanded Frequency Free-field Frequency Uncertainty Influence Uncertainty Response Response Uncertainty (6 digits) Response 2360 2371.37 –0.09 0.11 0.19 0.15 0.08 0.18 0.18...
  • Page 80 Sound Level Meter Type 2245 – Instruction Manual Table A.2 (Continued) Free-field 0° frequency response for the sound level meter Exact Microphone Nominal Expanded Body Expanded Electrical Acoustical Expanded Frequency Free-field Frequency Uncertainty Influence Uncertainty Response Response Uncertainty (6 digits)
  • Page 81 Tables Table A.3 (Continued) Free-field 0° frequency response for the sound level meter with Windscreen UA-1650 Exact Microphone Nominal Expanded Body Expanded Influence of Expanded Electrical Acoustical Expanded Frequency Free-field Frequency Uncertainty Influence Uncertainty Windscreen Uncertainty Response Response Uncertainty (6 digits) Response 1320 1333.52...
  • Page 82 Sound Level Meter Type 2245 – Instruction Manual Table A.3 (Continued) Free-field 0° frequency response for the sound level meter with Windscreen UA-1650 Exact Microphone Nominal Expanded Body Expanded Influence of Expanded Electrical Acoustical Expanded Frequency Free-field Frequency Uncertainty Influence...

  • Page 83: Diffuse-Field Frequency Responses

    Tables Diffuse-field Frequency Responses Diffuse-field frequency responses with Z-frequency weighting. Measured with sounds at random incidence and the sound level meter’s Sound Field Correction parameter set to Diffuse-field, see section 4.6. Table A.4 Diffuse-field frequency response for the sound level meter Exact Microphone Nominal...
  • Page 84 Sound Level Meter Type 2245 – Instruction Manual Table A.4 (Continued) Diffuse-field frequency response for the sound level meter Exact Microphone Nominal Electrical Acoustical Expanded Frequency Diffuse-field Frequency Response Response Uncertainty (6 digits) Response 2360 2371.37 –0.51 0.46 –0.05 0.13 2511.89...
  • Page 85 Tables Table A.4 (Continued) Diffuse-field frequency response for the sound level meter Exact Microphone Nominal Electrical Acoustical Expanded Frequency Diffuse-field Frequency Response Response Uncertainty (6 digits) Response 13200 13335.2 –4.15 4.04 –0.11 0.40 14000 14125.4 –4.52 4.37 –0.15 0.42 15000 14962.4 –4.86 4.80...
  • Page 86 Sound Level Meter Type 2245 – Instruction Manual Table A.5 (Continued) Diffuse-field frequency response for the sound level meter with Windscreen UA-1650 Exact Microphone Nominal Expanded Influence of Expanded Electrical Acoustical Expanded Frequency Diffuse-field Frequency Uncertainty Windscreen Uncertainty Response Response...
  • Page 87 Tables Table A.5 (Continued) Diffuse-field frequency response for the sound level meter with Windscreen UA-1650 Exact Microphone Nominal Expanded Influence of Expanded Electrical Acoustical Expanded Frequency Diffuse-field Frequency Uncertainty Windscreen Uncertainty Response Response Uncertainty (6 digits) Response 9500 9440.61 –3.02 0.23 –0.82 0.56...

  • Page 88: Free-Field Frequency Responses For Diffuse-Field Calibrated Instruments

    Sound Level Meter Type 2245 – Instruction Manual Free-field Frequency Responses for Diffuse-field Calibrated Instruments Free-field frequency response in the reference direction for diffuse-field calibrated instruments according to IEC 60651 and IEC 60804. Measured with plane progressive sinusoidal sound waves incident from the reference direction and the sound level meter’s Sound Field Correction parameter set to Diffuse-field, see section 4.6.
  • Page 89 Tables Sound field Diffuse-field Table A.6 (Continued) Free-field 0° frequency response with the set to for the configurations for which there are specified normal free-field responses Exact Configuration Configuration Nominal Frequency as in as in Frequency (6 digits) Table A.2 Table A.3 2240 2238.72...
  • Page 90 Sound Level Meter Type 2245 – Instruction Manual Sound field Diffuse-field Table A.6 (Continued) Free-field 0° frequency response with the set to for the configurations for which there are specified normal free-field responses Exact Configuration Configuration Nominal Frequency as in...

  • Page 91: Directional Responses

    Tables Directional Responses Directional responses for plane progressive sinusoidal sound waves normalised to the response in the reference direction, including sensitivity variations. Table A.7 Directional response for the sound level meter, measured in a plane parallel to the display and along the microphone’s axis, 250 Hz –...
  • Page 92 Sound Level Meter Type 2245 – Instruction Manual Table A.7 (Continued) Directional response for the sound level meter, measured in a plane parallel to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency Angle 250 Hz...
  • Page 93 Tables Table A.7 (Continued) Directional response for the sound level meter, measured in a plane parallel to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency Angle 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz 1 kHz...
  • Page 94 Sound Level Meter Type 2245 – Instruction Manual Table A.8 (Continued) Directional response for the sound level meter, measured in a plane parallel to the display and along the microphone’s axis, 3.15 kHz – 10 kHz Nominal Frequency Angle 3.55 kHz 4.5 kHz...
  • Page 95 Tables Table A.8 (Continued) Directional response for the sound level meter, measured in a plane parallel to the display and along the microphone’s axis, 3.15 kHz – 10 kHz Nominal Frequency Angle 3.55 kHz 4.5 kHz 5.6 kHz 7.1 kHz 8.5 kHz 9 kHz 9.5 kHz...
  • Page 96 Sound Level Meter Type 2245 – Instruction Manual Table A.9 (Continued) Directional response for the sound level meter, measured in a plane parallel to the display and along the microphone’s axis, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz 11.2 kHz...
  • Page 97 Tables Table A.9 (Continued) Directional response for the sound level meter, measured in a plane parallel to the display and along the microphone’s axis, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz 11.2 kHz 11.8 kHz 13.2 kHz 14 kHz 15 kHz 17 kHz...
  • Page 98 Sound Level Meter Type 2245 – Instruction Manual Table A.10 Directional response for the sound level meter, measured in a plane perpendicular to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency Angle 250 Hz...
  • Page 99 Tables Table A.10 (Continued) Directional response for the sound level meter, measured in a plane perpendicular to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency Angle 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz 1 kHz...
  • Page 100 Sound Level Meter Type 2245 – Instruction Manual Table A.10 (Continued) Directional response for the sound level meter, measured in a plane perpendicular to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency Angle 250 Hz...
  • Page 101 Tables Table A.11 (Continued) Directional response for the sound level meter, measured in a plane perpendicular to the display and along the microphones’ axis, 3.15 kHz – 10 kHz Nominal Frequency Angle 3.55 kHz 4.5 kHz 5.6 kHz 7.1 kHz 8.5 kHz 9 kHz 9.5 kHz...
  • Page 102 Sound Level Meter Type 2245 – Instruction Manual Table A.11 (Continued) Directional response for the sound level meter, measured in a plane perpendicular to the display and along the microphones’ axis, 3.15 kHz – 10 kHz Nominal Frequency Angle 3.55 kHz 4.5 kHz...
  • Page 103 Tables Table A.12 (Continued) Directional response for the sound level meter, measured in a plane perpendicular to the display and along the microphone’s axis, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz 11.2 kHz 11.8 kHz 13.2 kHz 14 kHz 15 kHz 17 kHz...
  • Page 104 Sound Level Meter Type 2245 – Instruction Manual Table A.12 (Continued) Directional response for the sound level meter, measured in a plane perpendicular to the display and along the microphone’s axis, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz 11.2 kHz...
  • Page 105 Tables Table A.13 Sensitivity variations of the sound level meter, at sound incidence angles within ±° from the reference direction Exact Nominal Frequency Variation Variation Variation Frequency ±30° ±90° ±150° (6 digits) 251.189 0.09 0.15 0.18 316.228 0.41 0.41 0.47 398.107 0.44 0.44...
  • Page 106 Sound Level Meter Type 2245 – Instruction Manual Table A.13 (Continued) Sensitivity variations of the sound level meter, at sound incidence angles within ±° from the reference direction Exact Nominal Frequency Variation Variation Variation Frequency ±30° ±90° ±150° (6 digits) 13200 13335.2...
  • Page 107 Tables Table A.14 (Continued) Influence of Windscreen UA-1650 on directional response, 250 Hz – 2.8 kHz Nominal Frequency Angle 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz 1 kHz 1.25 kHz 1.6 kHz 2 kHz 2.24 kHz 2.5 kHz 2.8 kHz 105°...
  • Page 108 Sound Level Meter Type 2245 – Instruction Manual Table A.14 (Continued) Influence of Windscreen UA-1650 on directional response, 250 Hz – 2.8 kHz Nominal Frequency Angle 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz 1 kHz 1.25 kHz...
  • Page 109 Tables Table A.15 (Continued) Influence of Windscreen UA-1650 on directional response, 3.15 kHz – 10 kHz Nominal Frequency Angle 3.55 kHz 4.5 kHz 5.6 kHz 7.1 kHz 8.5 kHz 9 kHz 9.5 kHz 3.15 kHz 4 kHz 5 kHz 6.3 kHz 8 kHz 10 kHz 75°...
  • Page 110 Sound Level Meter Type 2245 – Instruction Manual Table A.15 (Continued) Influence of Windscreen UA-1650 on directional response, 3.15 kHz – 10 kHz Nominal Frequency Angle 3.55 kHz 4.5 kHz 5.6 kHz 7.1 kHz 8.5 kHz 9 kHz 9.5 kHz 3.15 kHz...
  • Page 111 Tables Table A.16 Influence of Windscreen UA-1650 on directional response, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz 11.2 kHz 11.8 kHz 13.2 kHz 14 kHz 15 kHz 17 kHz 18 kHz 19 kHz 12.5 kHz 16 kHz 20 kHz 0°...
  • Page 112 Sound Level Meter Type 2245 – Instruction Manual Table A.16 (Continued) Influence of Windscreen UA-1650 on directional response, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz 11.2 kHz 11.8 kHz 13.2 kHz 14 kHz 15 kHz 17 kHz...
  • Page 113 Tables Table A.16 (Continued) Influence of Windscreen UA-1650 on directional response, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz 11.2 kHz 11.8 kHz 13.2 kHz 14 kHz 15 kHz 17 kHz 18 kHz 19 kHz 12.5 kHz 16 kHz 20 kHz 350°...
  • Page 114 Sound Level Meter Type 2245 – Instruction Manual Table A.17 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane parallel to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency...
  • Page 115 Tables Table A.17 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane parallel to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency Angle 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz...
  • Page 116 Sound Level Meter Type 2245 – Instruction Manual Table A.18 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane parallel to the display and along the microphone’s axis, 3.15 kHz – 10kHz Nominal Frequency Angle 3.55 kHz...
  • Page 117 Tables Table A.18 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane parallel to the display and along the microphone’s axis, 3.15 kHz – 10kHz Nominal Frequency Angle 3.55 kHz 4.5 kHz 5.6 kHz 7.1 kHz 8.5 kHz 9 kHz...
  • Page 118 Sound Level Meter Type 2245 – Instruction Manual Table A.19 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane parallel to the display and along the microphone’s axis, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz...
  • Page 119 Tables Table A.19 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane parallel to the display and along the microphone’s axis, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz 11.2 kHz 11.8 kHz 13.2 kHz 14 kHz 15 kHz...
  • Page 120 Sound Level Meter Type 2245 – Instruction Manual Table A.20 Directional response for the sound level meter with Windscreen UA-1650, measured in a plane perpendicular to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency...
  • Page 121 Tables Table A.20 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane perpendicular to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency Angle 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz...
  • Page 122 Sound Level Meter Type 2245 – Instruction Manual Table A.20 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane perpendicular to the display and along the microphone’s axis, 250 Hz – 2.8 kHz Nominal Frequency...
  • Page 123 Tables Table A.21 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane perpendicular to the display and along the microphone’s axis, 3.15 kHz – 10 kHz Nominal Frequency Angle 3.55 kHz 4.5 kHz 5.6 kHz 7.1 kHz 8.5 kHz 9 kHz...
  • Page 124 Sound Level Meter Type 2245 – Instruction Manual Table A.21 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane perpendicular to the display and along the microphone’s axis, 3.15 kHz – 10 kHz Nominal Frequency Angle 3.55 kHz...
  • Page 125 Tables Table A.22 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane perpendicular to the display and along the microphone’s axis, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz 11.2 kHz 11.8 kHz 13.2 kHz 14 kHz 15 kHz...
  • Page 126 Sound Level Meter Type 2245 – Instruction Manual Table A.22 (Continued) Directional response for the sound level meter with Windscreen UA-1650, measured in a plane perpendicular to the display and along the microphone’s axis, 10.6 kHz – 20 kHz Nominal Frequency Angle 10.6 kHz...
  • Page 127 Tables Table A.23 (Continued) Sensitivity variations of the sound level meter with Windscreen UA-1650, at sound incidence angles within ±° from the reference direction Exact Nominal Frequency Variation Variation Variation Frequency ±30° ±90° ±150° (6 digits) 1584.89 0.23 0.52 0.73 1600 1995.26 0.11...

  • Page 128: Periodic Testing Of Acoustical Frequency Responses

    Sound Level Meter Type 2245 – Instruction Manual Periodic Testing of Acoustical Frequency Responses This section gives the correction data that shall be applied to sound levels displayed in response to the sound pressure produced by Multifunction Acoustic Calibrator Type 4226, or in response to simulation of sound...
  • Page 129 Tables Table A.25 Acoustical test with Electrostatic Actuator UA-0033. Correction data that must be applied to the readings of the sound level meter in order to obtain equivalent sound levels that would be displayed in response to plane progressive sinusoidal sound waves incident from the reference direction or from random directions Correction Data Correction Data...
  • Page 130 Sound Level Meter Type 2245 – Instruction Manual Table A.25 (Continued) Acoustical test with Electrostatic Actuator UA-0033. Correction data that must be applied to the readings of the sound level meter in order to obtain equivalent sound levels that would be displayed in response to plane progressive sinusoidal sound...
  • Page 131 Tables Table A.25 (Continued) Acoustical test with Electrostatic Actuator UA-0033. Correction data that must be applied to the readings of the sound level meter in order to obtain equivalent sound levels that would be displayed in response to plane progressive sinusoidal sound waves incident from the reference direction or from random directions Correction Data Correction Data...
  • Page 132 Sound Level Meter Type 2245 – Instruction Manual...

  • Page 133: Cross-References To Standards

    Appendix B Cross-references to Standards Introduction This appendix provides cross-references between specific paragraphs in the standards that require topics to be documented in an instruction manual, and the corresponding sections in this manual that conform to those paragraphs. Section B.2 contains the cross-reference tables to the following relevant standards: IEC 61672-1 and IEC 61260. Section B.3 provides a list of cross-references to topics that are not provided in, or are irrelevant to this product.

  • Page 134: Cross-References To Standards

    Sound Level Meter Type 2245 – Instruction Manual Cross-references to Standards IEC 61672–1:2013 IEC 61672–1:2013 Standard’s This Manual’s Standard’s This Manual’s Paragraph Section Paragraph Section 5.1.4 1.2.3, 3.9.5 5.23.2 B.3n) 5.1.5 5.23.3 4.15.2 5.1.6 4.5, Chapter 2 5.23.4 4.15.2 5.1.7 B.3a)
  • Page 135 APPENDIX B Cross-references to Standards IEC 61672–1:2013 Standard’s This Manual’s Paragraph Section 9.2.4 c 9.2.5 a A.2, A.3, A.5 9.2.5 b 4.6.4, 4.6.5, A.2, A.3 Table A.3, Table A.5 9.2.5 c Table A.14 – Table A.16 9.2.5 d 3.6, A.6 9.2.6 a 9.2.6 b 2.3, 2.8, 2.9...
  • Page 136 Sound Level Meter Type 2245 – Instruction Manual IEC 61260:2014 Standard’s This Manual’s Paragraph Section 5.1.4 1.2.3, 3.8, 3.9 5.9.1 4.11 5.9.2 B.3j) 5.13.1 4.11.3 5.13.6 B.3b) 5.13.8 4.11.3 5.14.4 4.11.1, 4.11.2 5.17.1 2.15.2 5.18.1 B.3k) 5.19 3.3.2, 4.11.3 5.20.1 B.3l)

  • Page 137: Irrelevant Topics

    APPENDIX B Cross-references to Standards Irrelevant Topics This section provides a list of the cross-references to topics that are not provided in or are irrelevant to this product. References are made to the following texts: a) “No microphone extension device or cable can be used. The microphone is mounted directly on the sound level meter’s built-in preamplifier.”...
  • Page 138 Sound Level Meter Type 2245 – Instruction Manual...

  • Page 139: Index

    Index Numerics Compliance ...............64 Components needed for conformance .......4 1/1-octave band centre frequencies .........57 Condensation ..............60 1/1-octave band filters ............35 Configuration ..............41 1/3-octave band centre frequencies .........57 Conformance testing ............33 1/3-octave band filters ............35 Connector .................63 Cross-references to standards .........126 About ..................8 Accessories included in EMC test ........37 Data management ............12...
  • Page 140 Maximum relative standard deviation ......59 Random-incidence ............. 44 Maximum sinusoidal output voltage ........ 62 Frequency weightings ............23 Maximum sound level ............53 FW-2245 ................2 Maximum time-weighted sound level ......28 Measured quantities ............25 Measurement control ............9 Measurement range ............59 Guaranteed worst-case limit ..........
  • Page 141 Limit ................53 Sound exposure level ............30 Sound pressure level ............26 Specifications ..............39 Spectrum analysis .............57 Parameters Spectrum measurements ..........31 Important ..............41 Spectrum parameters ............9 PC software .................2 SPL ..................26 Peak C range ..............55 Standards ..............39, 126 Peak onset time ..............56 Static pressure ..............40 Peak sound level ...............30 Statistical parameters ............10...
  • Page 142 USB-C output ..............62 Warm environment ............60 Warm-up time ..............63 Weightings ................ 23 Vibration ................60 WELMEC ................39 Vibration sensitivity ............60 Wi-Fi .................. 60 Viewing Windscreen UA-1650 ............8 Measurements in real time ........19 Wireless interface ............. 60 Saved measurements ..........
  • Page 144 © Brüel & Kjær. All rights reserved. www.bksv.com...

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