Sound Level Meter Type 2245 with Microphone Type 4966 From Hardware Version 1.
Sound Level Meter Types 2245 – Instruction Manual Page 2 of 110 Contents Table of Contents Chapter 1 Introduction ........................................................................................... 5 1.1 About This Manual ..................................................................................... 5 1.1.1 Conventions Used in this Manual .................................................... 5 1.2 System Overview ...............................................................................
Sound Level Meter Types 2245 – Instruction Manual 3.4 3.5 3.6 3.7 3.8 3.9 Page 3 of 110 Wi-Fi and Bluetooth during tests.............................................................. 37 Mounting for Acoustical Tests.................................................................. 37 Periodic Testing of Acoustical Frequency Responses ............................ 38 Mounting for Mechanical Vibrations Tests ...............................................
Sound Level Meter Types 2245 – Instruction Manual Page 4 of 110 4.13 Wireless interface to the Sound Level Meter ........................................... 65 4.13.1 Bluetooth........................................................................................ 65 4.13.2 Wi-Fi .............................................................................................. 65 4.14 Electrical interface to the Sound Level Meter .......................................... 65 4.14.
Sound Level Meter Types 2245 – Instruction Manual Page 5 of 110 Chapter 1 Introduction 1.1 About This Manual This Instruction Manual for Sound Level Meter Type 2245 has been created to fulfil the documentation requirements of the national and international standards that the sound level meter conform to. These standards are listed in section 4.2. For other microphone configurations, supplements to this manual will be provided.
Sound Level Meter Types 2245 – Instruction Manual 1.2.3 Page 6 of 110 Hardware Setup This section provides an overview of the hardware components used with the sound level meter. A hardware overview is provided in Fig. 1.1, optional accessories are designated on the diagram. The components needed for conformance testing Sound Level Meter Type 2245 are listed in Table 1.1. Fig. 1.
Sound Level Meter Types 2245 – Instruction Manual Page 7 of 110 Table 1.
Sound Level Meter Types 2245 – Instruction Manual 1.2.4 Page 8 of 110 Block Diagrams The Block Diagram for Sound Level Meter Type 2245 is shown in Fig. 1.2. Fig. 1.
Sound Level Meter Types 2245 – Instruction Manual Page 9 of 110 Chapter 2 Short Guide to the Sound Level Meter 2.1 Introduction This chapter contains a brief guide to the use of the sound level meter. The user interface of the sound level meter is classic: 2.2 A screen for displaying settings, results and status A keyboard for navigating on the screen, changing settings and controlling the measurement A light ring to indicate which colour-coded to reflect the status of the instrument.
Sound Level Meter Types 2245 – Instruction Manual 2.3.1 Page 10 of 110 Measurement settings The acoustical frequency response and calibration depends on the sound field, the microphone, the microphone accessories used and the electrical frequency response.
Sound Level Meter Types 2245 – Instruction Manual Page 11 of 110 Use Measurement settings > Measurement control to setup how to control your measurement: Logging mode: Select Enabled to log measurement data at every Logging interval. Measurement time: Select Preset for the measurement to run for Preset time – or Free to run until you stop it. Back-erase mode: Select Enabled to backerase all data for the last Back-erase time, when continuing a paused measurement.
Sound Level Meter Types 2245 – Instruction Manual Page 12 of 110 Use Measurement settings > Spectrum parameters to select Bandwidth (1/1octave or 1/3-octave parameters to measure. ), Frequency Weighting to use and the spectrum The use of keyboard in this display. See details on measured broadband parameters in sections 2.13 Frequency Weightings and 2.14 Measured Quantities.
Sound Level Meter Types 2245 – Instruction Manual 2.3.2 Page 13 of 110 Display settings Use Display settings > Screen brightness and > Light ring brightness to adjust the brightness of the screen and light ring on the instrument. Use Display settings > Colour scheme to select either Light or Dark scheme. Use the rest of the Display settings to specify how to display your measurement data.
Sound Level Meter Types 2245 – Instruction Manual 2.3.5 Page 14 of 110 Calibration history ???? 2.3.6 Status Use Status to see the Battery and Disk status: The small icon in the bottom left corner of the display gives a brief overview of the battery status. This icon is on all displays.
Sound Level Meter Types 2245 – Instruction Manual 2.4 Page 15 of 110 Calibration 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.
Sound Level Meter Types 2245 – Instruction Manual Page 16 of 110 4. Use right arrow button to enter Calibration and insert the Calibrator serial no. (use up/down arrow buttons to change the number) 5. Use right arrow button to enter Calibrate: 6. 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.
Sound Level Meter Types 2245 – Instruction Manual Page 17 of 110 10. Press the button to accept the calibration and remove the calibrator. It will automatically switch off after a few seconds. If no calibration signal is detected, you will be informed about an unstable calibration signal and asked to mount the calibrator, switch it on and press Retry to restart the calibration. If the calibration deviates more than ± 1.5 dB (± 1.
Sound Level Meter Types 2245 – Instruction Manual Page 18 of 110 6. The sound level meter will detect the signal and pop up the message: 7. 8. Press the button to start the calibration check Detection signal appears on the screen as feedback. When the signal has been detected and verified for a while, then the sensitivity is calculated and displayed on the screen together with deviations from last calibration and from initial calibration: 9.
Sound Level Meter Types 2245 – Instruction Manual Page 19 of 110 Note: You can disable the automatic calibration check in System settings > Advanced settings > Calibration: 2.5 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. Which one can be selected with the left/right arrows. This measurement cannot be saved but it is useful to survey where to measure.
Sound Level Meter Types 2245 – Instruction Manual Page 20 of 110 Press again to reset the measurement and display, ready for a new measurement. 2.5.2 Overload and Underrange ???? 2.
Sound Level Meter Types 2245 – Instruction Manual 2.
Sound Level Meter Types 2245 – Instruction Manual Page 22 of 110 5.1.6 .....The Instruction Manual shall describe appropriate procedures for use of the sound level meter. 5.18.5 When results of a measurement are provided at a digital output, the Instruction Manual shall describe the method for transferring or downloading of digital data to an external data-storage or display device. The computer software as well as the hardware for the interface shall be identified. 5.20.1, 9.2.6 f) ......
Sound Level Meter Types 2245 – Instruction Manual 2.8 Page 23 of 110 Placing the Microphone (Sound Level Meter) The sound level meter 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. Typically, the sound level 0.5 m from a plain reflecting wall is 3 dB higher than if there was no wall.
Sound Level Meter Types 2245 – Instruction Manual Page 24 of 110 Fig. 2.1 Error from self-generated noise Fig. 2.1 shows the error on the measured sound levels from the presence of selfgenerated noise. The curve can also be used for compensation by subtracting the error from the measured sound levels. This is equivalent to using the formula. 2.11 Measuring at Low Static Pressure The frequency response of the microphone depends on the static pressure.
Sound Level Meter Types 2245 – Instruction Manual Page 25 of 110 Fig. 2.3 Typical variation in sensitivity at 250 Hz from that at 101.3 kPa as a function of ambient pressure At the Calibration Check Frequency (1 kHz), the recommended Brüel & Kjær Sound Calibrator Type 4231 is rather insensitive to variations in the static pressure – the static pressure coefficient is below 0.001 dB/kPa. 2.12 Mechanical Vibration Mechanical vibration can affect indicated levels at low levels. Section 4.12.
Sound Level Meter Types 2245 – Instruction Manual Page 26 of 110 Table 2.1 Frequency weighting design goals Nominal Frequency (Hz) Exact Frequency Weightings Frequency (1 decimal) (6 digits) (dB) (Hz) A B C Z 10 10.0000 -70.4 -38.2 -14.3 0.0 13 12.5893 -63.4 -33.2 -11.2 0.0 16 15.8489 -56.7 -28.5 -8.5 0.0 20 19.9526 -50.5 -24.2 -6.2 0.0 25 25.1189 -44.7 -20.4 -4.4 0.0 32 31.6228 -39.4 -17.1 -3.0 0.0 40 39.8107 -34.6 -14.2 -2.0 0.0 50 50.1187 -30.
Sound Level Meter Types 2245 – Instruction Manual 2.14 Page 27 of 110 Measured Quantities This section gives a precise mathematical definition of the measured quantities and defines the abbreviations used on 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.
Sound Level Meter Types 2245 – Instruction Manual Page 28 of 110 Table 2.2 Exponential time constants and corresponding averaging times Time Weighting Time Constant (seconds) Averaging Time (seconds) Fast 0.125 0.
Sound Level Meter Types 2245 – Instruction Manual Page 29 of 110 Sound Pressure Level (SPL) The sound pressure level, Lxy(SPL)(Tn), is defined as the greatest time-weighted sound level, Lxy(t), within a time interval starting at t = Tn and ending at t = Tn + Δt where: x is A for A-weighted, B for B-weighted, C for C-weighted or Z for Z-weighted y is F for Fast-weighted, S for Slow-weighted or I for Impulse-weighted Tn = t0 + n·Δt t0 is some starting time n is an incrementing integer Δt is the
Sound Level Meter Types 2245 – Instruction Manual Page 30 of 110 Press Stop to a stopped measurement to reset the latched overload and to reset all time-weighted sound levels to zero (–∞ dB). From this, they increase to their current values. The timed measurements derived from time-weighted sound levels (e.g.
Sound Level Meter Types 2245 – Instruction Manual Page 31 of 110 Equivalent Continuous Sound Level The equivalent continuous sound level (also called time-average sound level), Lxeq(T), is defined as twenty times the logarithm to base ten of the ratio of a root-mean-square sound pressure during a time interval to the reference sound pressure, sound pressure being obtained with a frequency weighting, x.
Sound Level Meter Types 2245 – Instruction Manual Page 32 of 110 Taktmaximal-Mittelungspegel The Taktmaximal-Mittelungspegel, LAFTeq(T), is defined as ten times the logarithm to base ten of the mean of ten to the power of the Taktmaximalpegel, LAFT(Tn), divided by ten during a time interval.
Sound Level Meter Types 2245 – Instruction Manual Page 33 of 110 Peak Sound Level The peak sound level, Lxpeak(T), is defined as twenty times the logarithm to base ten of the ratio of the greatest absolute instantaneous sound pressure, px(t), within a time interval starting at t = T and ending at t = T +Δt, to the reference sound pressure, p0, instantaneous sound pressure being obtained with a frequency weighting, x, where: x is A for A-weighted, B for B-weighted, C for C-weighted or Z for Z-we
Sound Level Meter Types 2245 – Instruction Manual Page 34 of 110 2.14.3 Spectrum Measurements The definition of the measured quantities is the same as for the broadband measurements. At low frequency bands the exponential time constants for Fast and Slow weighting are modified to get a reasonable B*T product, see section 4.11.5. 2.14.
Sound Level Meter Types 2245 – Instruction Manual 2.15 Page 35 of 110 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 the flashing red triangle and by a flashing red “traffic light” indicator. The indication is displayed as long as the overload condition exists or for 1 second, whichever is the greater.
Sound Level Meter Types 2245 – Instruction Manual Page 36 of 110 Chapter 3 Conformance Testing 3.1 Introduction This chapter contains the information needed to conduct conformance testing according to the specified standards. 3.2 Microphone, Accessories and Sound Fields The acoustical frequency response and calibration depends on the sound field, the microphone, the microphone accessories used and the electrical frequency response.
Sound Level Meter Types 2245 – Instruction Manual Page 37 of 110 For acoustic calibration the Brüel & Kjær Sound Level Calibrator Type 4231 shall be used and selected in System settings >Advanced settings > Calibration > Calibrator. The adjustment data according to IEC 61672-1 paragraph 5.2.4 for Microphone Type 4966 with Sound Calibrator Type 4231 is 93.85 dB for the 94 dB setting of the calibrator.
Sound Level Meter Types 2245 – Instruction Manual Page 38 of 110 The sound level meter can be mounted using Tripod Extension for Hand-held Analyzers UA-1651. The tripod extension stem is screwed into the Tripod Mounting Thread situated on the rear end of the sound level meter. The thread on the other end of the stem is used to mount the assembly to the test rig. 3.
Sound Level Meter Types 2245 – Instruction Manual Page 39 of 110 Fig. 3.1 Setting up the signal source for an immunity test To prevent the acoustic source from being affected by acoustic noise in the surroundings, the following method can be used. Insert an acoustic attenuator in the hose close to the microphone, so that the sound pressure within the greater part of the hose is held far above the surrounding sound level.
Sound Level Meter Types 2245 – Instruction Manual 3.9.4 Page 40 of 110 Accessories Included in EMC Test The following accessories are connected to the instrument during the EMC tests: Mains Power Supply ZG-xxxx is connected to the 'USB' socket on the rear pannel of 2245 using a USB cable AO-xxxx. Detailed descriptions of the parts are given in Table 1.1. 3.9.
Sound Level Meter Types 2245 – Instruction Manual Page 41 of 110 Only 1/3-octave-band filters need to be tested. This is because the filters are digital, and no disturbance at the filter input will show up to be greater at 1/1-octave bandwidth than at 1/3-octave bandwidth.
Sound Level Meter Types 2245 – Instruction Manual Page 42 of 110 Chapter 4 Specifications 4.1 Specifications Specifications are given for the configuration detailed in Chapter 1. Unless specifically noted, specifications are given as typical data under Reference Environmental Conditions, and with the sound level meter calibrated to the nominal microphone open circuit sensitivity. 4.
Sound Level Meter Types 2245 – Instruction Manual 4.4 Page 43 of 110 Reference Conditions for Acoustic Calibration Reference Level Range: Only one level range exists and this is the reference level range. Reference Sound Pressure Level: 94.00 dB re. 20 μPa Calibration Check Frequency: 1 kHz 4.5 Microphone Microphone Type 4966: Type: Prepolarized Free-field ½" Condenser Microphone Nominal Open Circuit Sensitivity: 50 mV/Pa, (corresponding to –26 dB re 1 V/Pa) ±1.
Sound Level Meter Types 2245 – Instruction Manual 4.6 Page 44 of 110 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. The acoustical frequency response depends on the sound field, the microphone, the used microphone accessories and the electrical frequency response.
Sound Level Meter Types 2245 – Instruction Manual Page 45 of 110 Fig. 4.1 Uncompensated electrical frequency response, corresponds to Table A.1 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.
Sound Level Meter Types 2245 – Instruction Manual 4.6.3 Page 46 of 110 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.
Sound Level Meter Types 2245 – Instruction Manual Page 47 of 110 Fig. 4.5 Diffuse-field frequency response for the sound level meter. Corresponds to the “Acoustical Response” column in Table A. 4. Fig. 4.6 Diffuse-field frequency response for the sound level meter with Windscreen UA-1650. Corresponds to the “Acoustical Response” column in Table A. 5. 4.6.
Sound Level Meter Types 2245 – Instruction Manual 4.7 Page 48 of 110 Directional Responses This section gives directional responses for plane progressive sinusoidal sound waves normalised to the response in the reference direction. Influence of the windscreen UA1650 is also given as tables in Appendix A. Only the resulting directional responses are given here as graphs.
Sound Level Meter Types 2245 – Instruction Manual Page 49 of 110 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.
Sound Level Meter Types 2245 – Instruction Manual Page 50 of 110 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.
Sound Level Meter Types 2245 – Instruction Manual Page 51 of 110 Fig. 4.9 Sensitivity variations of the sound level meter, at sound incidence angles within ±Ɵ ° from the reference direction. Corresponds to Table A.
Sound Level Meter Types 2245 – Instruction Manual Page 52 of 110 Fig. 4.10 Directional response for the sound level meter with Windscreen UA1650, measured in a plane parallel to the display and along the microphone axis. Corresponds to Table A.17 to Table A.
Sound Level Meter Types 2245 – Instruction Manual Page 53 of 110 Fig. 4.11 Directional response for the sound level meter with Windscreen UA1650, measured in a plane perpendicular to the display and along the microphone axis. Corresponds to Table A.20 to Table A.
Sound Level Meter Types 2245 – Instruction Manual Page 54 of 110 Fig. 4.12 Sensitivity variations of the sound level meter with Windscreen UA1650, at sound incidence angles within ±Ɵ ° from the reference direction. Corresponds to Table A.
Sound Level Meter Types 2245 – Instruction Manual 4.8 Page 55 of 110 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. 4.8.1 Maximum Broadband Self-generated Noise Table 4.1 Maximum broadband self-generated noise Maximum Noise 4.8.2 Frequency Weighting A-weighting B-weighting C-weighting Z-weighting (dB) (dB) (dB) (dB) Microphone 16.0 14.
Sound Level Meter Types 2245 – Instruction Manual Page 56 of 110 Fig. 4.14 Typical self-generated noise, 1/3 octave band 4.9 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 1.
Sound Level Meter Types 2245 – Instruction Manual 4.9.3 Page 57 of 110 Primary Indicator Range Primary Indicator Range according to the International Standard IEC 60651: Table 4.4 Primary Indicator Range 4.9.4 Upper Lower Limit Limit A-weighting B-weighting C-weighting Z-weighting (dB) (dB) (dB) (dB) (dB) 123.6 21.4 21.1 23.6 30.3 Indicator Range Indicator Range according to the international standard IEC 60804: Table 4.
Sound Level Meter Types 2245 – Instruction Manual 4.9.6 Page 58 of 110 Pulse Range Pulse Range according to the international standard IEC 60804 is the difference between the Upper and Lower Limit in the following table: Table 4.7 Pulse Range Upper Lower Limit Limit A-weighting B-weighting C-weighting Z-weighting (dB) (dB) (dB) (dB) (dB) 145.1 19.3 19.0 21.5 28.2 Please note: 4.9.7 For Sound Exposure Levels, the stated ranges are valid if 10*lg(Δt) is added to the limits.
Sound Level Meter Types 2245 – Instruction Manual 4.10 Page 59 of 110 Detectors Display-update Rates: Lxy broadband bars and spectra every 0.2 s; all other spectra and numbers every 1 s. 4.10.1 Exponential Averaging Exponential Averaging Times: Fast (250 ms), Slow (2000 ms), Impulse (70 ms + 1500 ms hold time. constant) Response to tone bursts for exponential averaging detectors according to IEC 60651 and DIN 45657: Table 4.
Sound Level Meter Types 2245 – Instruction Manual Page 60 of 110 4.10.
Sound Level Meter Types 2245 – Instruction Manual Page 61 of 110 Fig. 4.16 The shapes of the 1/1-octave band filters (from 0 to –3.5 dB). The innermost and outermost curves show IEC 61260 limits 4.11.2 1/3-octave Band Centre Frequencies Nominal: 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz, 50 Hz, 63 Hz, 80 Hz, 100 Hz, 125 Hz, 160 Hz, 200 Hz, 250 Hz, 315 Hz, 400 Hz, 500 Hz, 630 Hz, 800 Hz, 1 kHz, 1.25 kHz, 1.6 kHz, 2 kHz, 2.5 kHz, 3.15 kHz, 4 kHz, 5 kHz, 6.3 kHz, 8 kHz, 10 kHz, 12.
Sound Level Meter Types 2245 – Instruction Manual Page 62 of 110 Fig. 4.18 The shapes of the 1/3- octave band filters (from 0 to –3.5 dB).
Sound Level Meter Types 2245 – Instruction Manual Page 63 of 110 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 Linear Operating Range Upper Limit (dB) Lower Limit Lower Limit 1/1-octave 1/3-octave (dB) (dB) 21.2 22.1 141.2 Below the Lower Limit, the Level Linearity Error is less than or equal to the error found in Fig. 2.1 with Linh set to the Lower Limit – 11.5 dB.
Sound Level Meter Types 2245 – Instruction Manual Page 64 of 110 For a white Gaussian signal and for 1/1-octave centre frequencies from 16 Hz to 63 Hz, these time constants give a maximum relative standard deviation of approximately 1.5 dB. For 1/3-octave centre frequencies from 12.5 Hz to 160 Hz, these time constants give a maximum relative standard deviation of approximately 2 dB. 4.
Sound Level Meter Types 2245 – Instruction Manual Page 65 of 110 4.12.6 Immunity to Power and Radio-frequency Fields Fig. 4.19 The most sensitive direction 4.13 Wireless interface to the Sound Level Meter It is not possible to change or corrupt the measured values in any way through these interfaces. 4.13.1 Bluetooth Bluetooth is only used for paring devises (transferring IP address) for Wi-Fi. Standard: ???? Frequencies: ???? Power: ???? 4.13.
Sound Level Meter Types 2245 – Instruction Manual Page 66 of 110 Information on the signal source, frequency weighting and gain Maximum Peak Output Voltage: ±4.46 V Maximum Sinusoidal Output Voltage: 3.16 VRMS Output Impedance: 50 Ω Load Impedance: >15 kΩ÷çç< 1 nF for <0.2 dB attenuation from DC to 20 kHz, shortcircuit proof without affecting the measurement results Max DC Offset: ±15 mV 4.14.
Sound Level Meter Types 2245 – Instruction Manual Page 67 of 110 Charge Time: In instrument, typically 10 hours from empty at ambient temperatures below 30 °C. To protect the battery, charging will be terminated completely at ambient temperatures above 40 °C. At 30 to 40 °C charging time will be prolonged. With external charger ZG-0444 (optional accessory), typically 5 hours. Please note: 4.16 It is not recommended to charge the battery at temperatures below 0 °C (32 °F) or over 50 °C (122 °F).
Sound Level Meter Types 2245 – Instruction Manual Page 68 of 110 Humidity IEC 60068–2–78: Damp Heat: 93% RH (non-condensing at +40 °C (104 °F)). Recovery time 2 ??4 hours Mechanical Non-operating: IEC 60068–2–6: Vibration: 0.
Sound Level Meter Types 2245 – Instruction Manual Page 69 of 110 to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna.
Sound Level Meter Types 2245 – Instruction Manual Page 70 of 110 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.
Sound Level Meter Types 2245 – Instruction Manual Nominal Frequency (Hz) Exact Frequency (6 digits) (Hz) Page 71 of 110 Electrical A- B- Add to Acoustical C- Z- A- B- C- weighting weighting weighting weighting weighting weighting weighting 3000 2985.38 1.19 -0.39 -0.49 0.01 1.19 -0.39 -0.48 3150 3162.28 1.15 -0.45 -0.55 0.01 1.16 -0.45 -0.54 3350 3349.65 1.11 -0.52 -0.62 0.01 1.12 -0.51 -0.61 3550 3548.13 1.06 -0.59 -0.69 0.00 1.06 -0.59 -0.69 3750 3758.
Sound Level Meter Types 2245 – Instruction Manual Page 72 of 110 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 set to Free-field , see section 4.6. Table A.
Sound Level Meter Types 2245 – Instruction Manual Nominal Exact Frequency Frequency (6 digits) Microphone Expanded Free-field Body Expanded Page 73 of 110 Electrical Acoustical Expanded Uncertainty Influence Uncertainty Response Response Uncertainty Response Hz Hz dB dB dB dB dB dB dB 3750 3758.37 -0.11 0.12 0.08 0.15 0.14 0.11 0.19 4000 3981.07 -0.12 0.13 -0.13 0.15 0.14 -0.11 0.20 4250 4216.97 -0.13 0.13 0.16 0.15 0.15 0.18 0.20 4500 4466.84 -0.13 0.
Sound Level Meter Types 2245 – Instruction Manual Page 74 of 110 Table A. 3 Free-field 0° frequency response for the sound level meter with Windscreen UA-1650 Nominal Exact Frequency Frequency Microphone Expanded Free-field Body Expanded Uncertainty Influence Uncertainty Influence Expanded of Electrical Acoustical Expanded Uncertaint Response Response Uncertainty (6 digits) Response Windscre y Hz Hz dB dB dB dB en dB dB dB dB dB 63 63.0957 0.03 0.05 0.00 0.10 0.00 0.
Sound Level Meter Types 2245 – Instruction Manual Nominal Exact Frequency Frequency Microphone Expanded Free-field Body Expanded Uncertainty Influence Uncertainty Page 75 of 110 Influence Expanded of Electrical Acoustical Expanded Uncertaint Response Response Uncertainty (6 digits) Response Windscre y Hz Hz dB dB dB dB en dB dB dB dB dB 3750 3758.37 -0.11 0.12 0.08 0.15 0.16 0.20 -0.12 0.01 0.27 4000 3981.07 -0.12 0.13 -0.13 0.15 0.05 0.20 -0.06 -0.26 0.
Sound Level Meter Types 2245 – Instruction Manual Page 76 of 110 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 set to Diffuse-field , see section 4.6. Table A.
Sound Level Meter Types 2245 – Instruction Manual Nominal Exact Microphone Electrical Acoustical Expanded Frequency Frequency Diffuse-field Response Response Uncertainty (6 digits) Response Hz Hz dB dB dB dB 3750 3758.37 -0.99 1.00 0.01 0.14 4000 3981.07 -1.08 1.09 0.01 0.14 4250 4216.97 -1.18 1.19 0.01 0.15 4500 4466.84 -1.28 1.30 0.02 0.15 4750 4731.51 -1.39 1.41 0.02 0.15 5000 5011.87 -1.51 1.53 0.02 0.16 5300 5308.84 -1.64 1.65 0.01 0.
Sound Level Meter Types 2245 – Instruction Manual Page 78 of 110 Table A. 5 Diffuse-field frequency response for the sound level meter with Windscreen UA-1650 Nominal Exact Microphone Expanded Influence Expanded Frequency Frequency Diffuse-field Uncertainty of Electrical Acoustical Expanded Uncertainty Response Response Uncertainty (6 digits) Response Windscr Hz Hz dB dB een dB dB dB dB dB 63 63.0957 0.03 0.07 0.00 0.16 0.04 0.07 0.17 80 79.4328 0.02 0.07 0.00 0.16 0.
Sound Level Meter Types 2245 – Instruction Manual Nominal Exact Microphone Expanded Influence Expanded Frequency Frequency Diffuse-field Uncertainty (6 digits) Response of Page 79 of 110 Electrical Acoustical Expanded Uncertainty Response Response Uncertainty Windscr Hz Hz dB dB een dB dB dB dB dB 3750 3758.37 -0.99 0.14 0.18 0.25 0.78 -0.03 0.28 4000 3981.07 -1.08 0.14 0.03 0.25 0.93 -0.12 0.29 4250 4216.97 -1.18 0.15 -0.13 0.25 1.10 -0.21 0.29 4500 4466.
Sound Level Meter Types 2245 – Instruction Manual Page 80 of 110 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 set to Diffuse-field , see section 4.6. Table A.
Sound Level Meter Types 2245 – Instruction Manual Nominal Exact Frequency Frequency (6 digits) Configuration Configuration as in as in Table A.2 Table A.3 Hz Hz dB dB 3750 3758.37 0.97 0.75 4000 3981.07 0.84 0.68 4250 4216.97 1.22 1.13 4500 4466.84 1.16 1.13 4750 4731.51 1.19 1.23 5000 5011.87 1.40 1.51 5300 5308.84 1.44 1.62 5600 5623.41 1.68 1.92 6000 5956.62 1.63 1.92 6300 6309.57 1.95 2.30 6700 6683.44 2.09 2.48 7100 7079.46 2.31 2.
Sound Level Meter Types 2245 – Instruction Manual Page 82 of 110 Directional Responses Directional responses for plane progressive sinusoidal sound waves normalised to the response in the reference direction, including sensitivity variations.
Sound Level Meter Types 2245 – Instruction Manual Page 83 of 110 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 - 2.8 KHz Angel Nominal Frequency 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 0° 0.01 0.03 0.04 -0.01 -0.03 0.02 0.00 0.00 -0.01 -0.01 -0.01 -0.01 -0.01 5° -0.01 -0.02 0.00 0.01 -0.01 0.00 0.00 0.00 -0.01 0.
Sound Level Meter Types 2245 – Instruction Manual Page 84 of 110 Table A.8 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 Angel Nominal Frequency 3.15 KHz 3.55 KHz 4 KHz 4.5 KHz 5 KHz 5.6 KHz 6.3 KHz 7.1 KHz 8 KHz 8.5 KHz 9 KHz 9.5 KHz 10 KHz 0° -0.01 -0.01 -0.01 -0.01 -0.01 -0.02 -0.01 -0.02 -0.02 -0.02 -0.02 -0.02 -0.02 5° 0.00 -0.02 -0.01 -0.01 -0.02 -0.01 -0.02 -0.01 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 85 of 110 Table A.9 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 Angel Nominal Frequency 10.6 KHz 11.2 KHz 11.8 KHz 12.5 KHz 13.2 KHz 14 KHz 15 KHz 16 KHz 17 KHz 18 KHz 19 KHz 20 KHz 0° -0.02 -0.02 -0.02 -0.02 -0.02 -0.02 -0.03 -0.04 -0.04 -0.04 -0.03 -0.01 5° -0.03 -0.04 -0.05 -0.06 -0.06 -0.06 -0.07 -0.07 -0.09 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 86 of 110 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 Angel Nominal Frequency 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 0° 0.00 0.03 0.04 0.01 -0.01 0.03 -0.01 -0.01 -0.02 -0.02 0.01 0.00 -0.01 5° 0.02 -0.11 -0.12 0.01 0.09 -0.03 -0.01 -0.02 -0.03 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 87 of 110 Table A.11 Directional response for the sound level meter, measured in a plane perpendicular to the display and along the microphone’s axis, 3.15 KHz - 10 KHz Angel Nominal Frequency 3.15 KHz 3.55 KHz 4 KHz 4.5 KHz 5 KHz 5.6 KHz 6.3 KHz 7.1 KHz 8 KHz 8.5 KHz 9 KHz 9.5 KHz 10 KHz 0° 0.01 0.00 0.00 -0.01 -0.01 -0.01 0.00 -0.01 0.00 -0.01 -0.01 -0.01 -0.01 5° 0.01 -0.01 0.00 0.00 0.00 0.02 0.01 0.00 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 88 of 110 Table A.12 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 Angel Nominal Frequency 10.6 KHz 11.2 KHz 11.8 KHz 12.5 KHz 13.2 KHz 14 KHz 15 KHz 16 KHz 17 KHz 18 KHz 19 KHz 0° -0.01 -0.01 0.00 0.00 -0.02 -0.01 -0.02 -0.01 -0.02 -0.03 -0.01 0.01 5° 0.00 -0.02 -0.04 -0.03 -0.03 -0.03 -0.03 -0.02 -0.04 -0.04 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 89 of 110 Table A.13 Sensitivity variations of the sound level meter, at sound incidence angles within ±Ɵ ° from the reference direction Nominal Exact Frequency Frequency Max Variation Max Variation Max Variation ± 30° ± 90° ± 150° (6 digits) Hz Hz dB dB dB 250 251.189 0.09 0.15 0.18 315 316.228 0.41 0.41 0.47 400 398.107 0.44 0.44 0.44 500 501.187 0.05 0.17 0.25 630 630.957 0.37 0.45 0.67 800 794.328 0.23 0.
Sound Level Meter Types 2245 – Instruction Manual Page 90 of 110 Table A.14 Influence of Windscreen UA-1650 on directional response, 250 Hz 2.8 KHz Angel Nominal Frequency 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 0° -0.02 -0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 -0.01 -0.01 -0.01 -0.01 5° -0.02 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 -0.01 10° 0.03 0.01 0.00 -0.01 0.00 0.00 -0.01 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 91 of 110 Table A.15 Influence of Windscreen UA-1650 on directional response, 3.15 KHz - 10 KHz Angel Nominal Frequency 3.15 KHz 3.55 KHz 4 KHz 4.5 KHz 5 KHz 5.6 KHz 6.3 KHz 7.1 KHz 8 KHz 8.5 KHz 9 KHz 9.5 KHz 10 KHz 0° -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.02 -0.02 -0.01 -0.01 5° -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.02 -0.02 -0.01 0.00 0.00 10° 0.00 0.00 -0.01 -0.01 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 92 of 110 Table A.16 Influence of Windscreen UA-1650 on directional response, 10.6 KHz - 20 KHz Angel Nominal Frequency 10.6 KHz 11.2 KHz 11.8 KHz 12.5 KHz 13.2 KHz 14 KHz 15 KHz 16 KHz 17 KHz 18 KHz 19 KHz 20 KHz 0° -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.01 -0.02 5° -0.02 -0.03 -0.02 0.00 -0.01 -0.03 -0.01 0.00 -0.01 -0.02 -0.01 -0.03 10° -0.05 -0.08 -0.05 0.00 -0.03 -0.09 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 93 of 110 Table A.17 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 Angel Nominal Frequency 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 0° -0.01 0.02 0.03 0.00 -0.03 0.02 -0.01 0.00 -0.01 -0.01 -0.01 -0.02 -0.02 5° -0.03 -0.02 0.00 0.01 0.00 0.00 0.
Sound Level Meter Types 2245 – Instruction Manual Page 94 of 110 Table A.18 Directional response for the sound level meter with Windscreen UA1650, measured in a plane parallel to the display and along the microphone’s axis, 3.15 Hz - 10 KHz Angel Nominal Frequency 3.15 KHz 3.55 KHz 4 KHz 4.5 KHz 5 KHz 5.6 KHz 6.3 KHz 7.1 KHz 8 KHz 8.5 KHz 9 KHz 9.5 KHz 10 KHz 0° -0.02 -0.02 -0.02 -0.02 -0.03 -0.03 -0.03 -0.03 -0.03 -0.04 -0.04 -0.03 -0.03 5° -0.01 -0.03 -0.02 -0.02 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 95 of 110 Table A.19 Directional response for the sound level meter with Windscreen UA1650, measured in a plane parallel to the display and along the microphone’s axis, 10.6 KHz - 20 KHz Angel Nominal Frequency 10.6 KHz 11.2 KHz 11.8 KHz 12.5 KHz 13.2 KHz 14 KHz 15 KHz 16 KHz 17 KHz 18 KHz 19 KHz 20 KHz 0° -0.03 -0.03 -0.03 -0.03 -0.04 -0.03 -0.04 -0.05 -0.05 -0.05 -0.04 -0.02 5° -0.05 -0.06 -0.08 -0.07 -0.07 -0.09 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 96 of 110 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 Angel Nominal Frequency 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 0° -0.02 0.02 0.04 0.01 0.00 0.03 -0.02 -0.01 -0.02 -0.02 0.00 -0.01 -0.02 5° 0.01 -0.11 -0.11 0.01 0.10 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 97 of 110 Table A.21 Directional response for the sound level meter with Windscreen UA1650, measured in a plane perpendicular to the display and along the microphone’s axis, 3.15 KHz - 10 KHz Angel Nominal Frequency 3.15 KHz 3.55 KHz 4 KHz 4.5 KHz 5 KHz 5.6 KHz 6.3 KHz 7.1 KHz 8 KHz 8.5 KHz 9 KHz 9.5 KHz 10 KHz 0° 0.00 -0.01 -0.01 -0.02 -0.02 -0.02 -0.02 -0.02 -0.02 -0.02 -0.03 -0.02 -0.02 5° 0.00 -0.02 -0.01 -0.01 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 98 of 110 Table A.22 Directional response for the sound level meter with Windscreen UA1650, measured in a plane perpendicular to the display and along the microphone’s axis, 10.6 KHz - 20 KHz Angel Nominal Frequency 10.6 KHz 11.2 KHz 11.8 KHz 12.5 KHz 13.2 KHz 14 KHz 15 KHz 16 KHz 17 KHz 18 KHz 19 KHz 0° -0.02 -0.03 -0.02 -0.01 -0.03 -0.02 -0.03 -0.03 -0.03 -0.04 -0.02 0.00 5° -0.02 -0.04 -0.06 -0.04 -0.05 -0.05 -0.
Sound Level Meter Types 2245 – Instruction Manual Page 99 of 110 Table A.23 Sensitivity variations of the sound level meter with Windscreen UA-1650, at sound incidence angles within ±Ɵ ° from the reference direction Nominal Exact Frequency Frequency Max Variation Max Variation Max Variation ± 30° ± 90° ± 150° (6 digits) Hz Hz dB dB dB 250 251.189 0.08 0.18 0.22 315 316.228 0.43 0.43 0.51 400 398.107 0.44 0.44 0.47 500 501.187 0.05 0.19 0.28 630 630.957 0.37 0.47 0.
Sound Level Meter Types 2245 – Instruction Manual Page 100 of 110 Periodic Testing of Acoustical Frequency Responses This section gives the correction data that must 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 pressure by Electrostatic Actuator UA-0033, in order to obtain the equivalent sound levels that would be displayed under reference environmental conditions in response to plane p
Sound Level Meter Types 2245 – Instruction Manual Page 101 of 110 Table A. 25 Acoustical test with Electrostatic Actuator UA-0033.
Sound Level Meter Types 2245 – Instruction Manual Nominal Exact Frequency Frequency Page 102 of 110 Correction Expanded Correction Expanded Data Uncertainty Data Uncertainty (6 digits) For Type 2245 For Type 2245 Free-field 0° Free-field 0° Hz Hz Without dB dB With dB 3750 3758.37 1.17 0.19 1.07 0.27 dB 4000 3981.07 1.06 0.20 0.91 0.28 4250 4216.97 1.46 0.20 1.26 0.28 4500 4466.84 1.41 0.20 1.17 0.28 4750 4731.51 1.46 0.20 1.22 0.28 5000 5011.87 1.
Sound Level Meter Types 2245 – Instruction Manual Page 103 of 110 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 0 contains the cross-reference tables to the following relevant standards: IEC 61672–1 and IEC 61260.
Sound Level Meter Types 2245 – Instruction Manual Page 104 of 110 5.3.3.1 Error! Reference source not found., Error! Reference source not found., Table A.14 Table A.16 5.3.5.1 3.6, 0 5.5.5 4.7, 0 5.5.8 2.13 5.6.10 4.9.7 5.6.11 4.9.7 5.7.1 4.8.1 5.7.3 4.8.1, 3.3.2 5.7.5 2.10 5.8.1 2.14.1 5.11.1 2.14, 2.15 5.12.2 2.14, 2.15 5.13.1 4.9.8 5,17 B.3 d 5.18.1 2.14 5.18.2 2.14, B.3 e 5.18.3 2.14 5.18.4 4.10, 2.14.2 5.18.5 0, 1.2.2 5.18.6 B.3 e 5.19.1 4.13, 4.14.2 5.20.
Sound Level Meter Types 2245 – Instruction Manual Page 105 of 110 6.2.2 2.11 6.3.2 B.3 f 6.5.2 B.3 g 6.6.1 3.9.5 6.6.3 4.12.6 6.6.5 B.3 h 6.6.10 B.3 i 6.7 Error! Reference source not found. 7.1 B.3 a 7.2 Error! Reference source not found., REF _Ref503791841 \n \h 4.6, 4.7 7.3 4.2 7.4 0 7.5 1.2.3, 4.6, 4.7 9.1 b 1.2.3 9.2.1 a 4.2 9.2.1 b 1.2.3, 3.9.5, 2.8 9.2.1 c 4.5 9.2.1 d B.3 a 9.2.1 e B.3 c 9.2.1 f Error! Reference source not found. 9.2.2 a 2.14 9.2.2 b 0 9.
Sound Level Meter Types 2245 – Instruction Manual Page 106 of 110 9.2.3 d 4.15.1 9.2.4 a Error! Reference source not found. 9.2.4 b Error! Reference source not found. 9.2.4 c Error! Reference source not found. 9.2.5 a 0, 0, 0 9.2.5 b 4.6.4, 4.6.5, 0, 0 9.2.5 c 0, 4.6.4, 4.6.5, 0, 0 9.2.5 d 3.6, 0 9.2.6 a 4.5 9.2.6 b 2.8, 2.9, Error! Reference source not ound. 9.2.6 c 2.10 9.2.6 d 4.16 9.2.6 e 2.11 9.2.6 f 2.14.2, 0 9.2.6 g 4.10.2 9.2.6 h 2.14.2 9.2.6 i 2.14.2, 4.10.2 9.2.
Sound Level Meter Types 2245 – Instruction Manual Page 107 of 110 9.3 f 4.9.7 9.3 g 4.9.7 9.3 h 3.3.2 9.3 i 4.8.1 9.3 j 4.9.1, 3.3.2 9.3 k 4.15 9.3 l 4.12.1 9.3 m B.3 h 9.3 n 3.9.5 9.3 o 3.9.5, 4.12.6, 3.9.
Sound Level Meter Types 2245 – Instruction Manual Page 108 of 110 IEC 61260:2014 Standard’s Paragraph This Manual’s section 5.1.4 1.2, 3.8, 3.9.4, 3.9.5 5.9.1 4.11 5.9.2 B.3 j 5.13.1 4.11.3 5.13.6 B.3 b 5.13.8 4.11.3 5.14.4 4.11.1, 4.11.2 5.17.1 2.15.1 5.18.1 B.3 k 5.19 3.3.2, 4.11.3 5.20.1 B.3 l 5.22.2.1 4.12.2, 4.12.3 5.22.2.5 B.3 f 5.23.3.11 3.9 5.23.4.3 3.9 7.1 a) 4.2 7.1 b) 4.11.1, 4.11.2 7.1 c) 4.11 7.2 a) 4.11.3 7.2 b) 4.11.3 7.2 c) 3.3.2, 4.11.3 7.
Sound Level Meter Types 2245 – Instruction Manual Page 109 of 110 7.3 c) B.3 j 7.3 d) B.3 l 7.3 e) B.3 m, 4.13 7.3 f) 1.2, 3.8, 3.9.4, 3.9.5 7.3 g) B.3 g 7.3 h) 4.12.6 7.3 i) 3.9 7.3 j) 3.9 7.3 k) 3.8, 3.
Sound Level Meter Types 2245 – Instruction Manual Page 110 of 110 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 in the previous tables are made to the following items: a. "No microphone extension device or cable can be used, the microphone is mounted directly on the sound level meters build in preamplifier" b. "The sound level meter have only one level range" c.
