Svantek SV 977D User Manual
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Svantek SV 977D User Manual

Sound & vibration analyser
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USER MANUAL
SV 977D
SOUND & VIBRATION
ANALYSER
Copyright © 2022 SVANTEK.
Warsaw, 2022-11-23
Rev. 1.00
All rights reserved.

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  • Page 1 USER MANUAL SV 977D SOUND & VIBRATION ANALYSER Copyright © 2022 SVANTEK. Warsaw, 2022-11-23 Rev. 1.00 All rights reserved.
  • Page 2 Svantek provides this document “as is”, without warranty of any kind, either expressed or implied, including, but not limited to, its particular purpose. Svantek reserves the right to make improvements and/or changes to this manual, or to the products and/or the programs described in this manual, at any time.

  • Page 3: Table Of Contents

    SV 977D User Manual CONTENTS INDEX INTRODUCTION 1.1 SV 977D as Sound Level Meter & Analyser 1.2 SV 977D as Vibration Level Meter & Analyser 1.3 General features of SV 977D 1.4 Accessories included 1.5 Accessories available 1.6 Firmware options available GENERAL INFORMATION 2.1 Measurement configurations as Sound Level Meter (SLM)
  • Page 4 SV 977D User Manual 4.2 Setting the measurement trigger – Measurement Trigger 4.3 Setting parameters for profiles – Profiles 4.4 Configuring data logging – Logging 4.4.1 Setting logger general parameters – Logger Setup 4.4.2 Selecting results for logging – Logger Results 4.4.3 Selecting additional summary results for saving –...
  • Page 5 SV 977D User Manual CONFIGURING INSTRUMENT PARAMETERS – Instrument 7.1 Measurement auto start – Auto Start 7.2 Checking instrument’s powering – Battery 7.3 Setting the interface parameters – Communication Ports 7.4 Setting the external power On/Off conditions – External Power 7.5 Selecting the IEPE supply current –...
  • Page 6 13.4.5 Considering ambient noise distortions 13.4.6 STIPA measurements 13.5 Downloading files and processing data 13.5.1 Measurement with BA Assistant 13.5.2 Direct measurement with SV 977D (without BA Assistant) 13.5.3 Presentation of STIPA results 13.5.4 Changing background noise values 13.5.5 Generating reports 14 MEASUREMENT OF TONES –...
  • Page 7 B.3. Description of cyclical results blocks (Summary Results) B.4. Date and time (example decoding procedure) APPENDIX C. TECHNICAL SPECIFICATIONS C.1. Specification of SV 977D as Sound Level Meter (SLM) C.1.1 Specification of SV 977D as SLM in the standard configuration C.1.2 Effect of the SA 22 windscreen...
  • Page 8 SV 977D User Manual C.3. Specification of SV 977D as 1/1 octave and 1/3 octave analyser C.3.1 Specification of SV 977D as 1/1 and 1/3 octave analyser in the standard configuration for sound measurements C.3.1 Specification of SV 977D as 1/1 and 1/3 octave analyser in the standard configuration for vibration measurements C.3.2...

  • Page 9: Index

    SV 977D User Manual INDEX 1/1 Octave · 34, 89 Data port · 135 1/3 Octave · 34, 89 Data protocol · 134 Day time limits · 44 Decay · 105 Decay method · 108 Decimal mark · 69, 95 Default settings ·...
  • Page 10 SV 977D User Manual Logger view · 65, 69 Logging · 47, 90, 100 Low range · 57 General settings · 42, 90, 99 GPRS · 133 GPS · 77 GPS view · 67 Gradient · 46 Main menu · 23 Gradient trigger ·...
  • Page 11 SV 977D User Manual Recording on trigger · 53 Speech intelligibility · 113 Recording time · 54, 55, 106 Start delay · 42 Rectangle · 101 Start measurements · 22 Reference levels · 84 Start synchronisation · 42 Registration port · 135 Statistical levels ·...

  • Page 12: Introduction

    SvanMOBILE and BA Assistant smartphone applications. Working as a part of the SV 277 monitoring station, equipped with the cellular modem, SV 977D can transfer measured data via Internet to PC with the use of SvanPC++_RC option or via SvanNET web service. The instrument can be fully remotely controlled via these programs.

  • Page 13: 977D As Sound Level Meter & Analyser

    45 filters with centre frequencies 0.8 Hz ÷ 20 kHz, Class 1 IEC 61260-1: 2014. • Optional RPM measurement with the use of RPM probe, connected to the I/O socket of SV 977D. • Optional FFT analysis with the single Total overall value, performed with preselected frequency weighting filters and windows.

  • Page 14: Accessories Included

    • SA 31 external charger for four AA rechargeable batteries 1.6 F IRMWARE OPTIONS AVAILABLE The standard firmware of SV 977D includes 1/1 octave analysis. Other functions are optional: • SF 977_2 1/3 octave analysis option • SF 977_4 FFT analysis option •...

  • Page 15: General Information

    SV 977D User Manual GENERAL INFORMATION 2.1 M (SLM) EASUREMENT CONFIGURATIONS AS OUND EVEL ETER The instrument's normal operating mode as SLM assumes operating with a preamplifier and a microphone attached to the instrument and without a windscreen. Optionally the instrument can be operated with the windscreen attached to the microphone or with the preamplifier and microphone fitted in the outdoor microphone kit and connected with the instrument by the extension cable (see Appendix C.7 for specification).

  • Page 16: Sound Measurements In Special Conditions

    2.4 I NPUT AND OUTPUT SOCKETS OF THE INSTRUMENT SV 977D is supplied disassembled, so the user should mount the MK 255 microphone and SV 12L preamplifier on his own. It doesn’t matter which elements will be assembled first: the microphone with the preamplifier or the instrument with the preamplifier.
  • Page 17 Note: The originally supplied Kingston Industrial memory card has been tested by SVANTEK and cards of this type are strongly recommended for use when the original card is going to be replaced.

  • Page 18: Power Supply

    2.5 P OWER SUPPLY SV 977D can be powered from one of the following sources: • Four AA standard size internal batteries. In case of alkaline type, with a new fully charged set, the instrument can operate more than 12 h (6.0 V / 1.6 Ah). Instead of the ordinary alkaline cells, four AA rechargeable batteries can be used (a separate external charger is required for charging them).

  • Page 19: Control Keys

    SV 977D User Manual When there is a connection to the 7–16V socket the “plug” icon appears, and the Battery screen displays the voltage of the External Power. 2.6 C ONTROL KEYS Control of the instrument has been developed in a fully interactive manner. Convenient and intuitive menu is used for device configuration Thanks to that, the number of keys has been reduced to nine for ease of use and convenience.
  • Page 20 SV 977D User Manual [<S/P>] This key (<Alt> + <ESC>) breaks the measurement process temporary or enables saving of the setup file if the instrument is not running the measurement. ◄, ► These keys allow you to: • change the cursor position to the left or right field;...

  • Page 21: Working With The Instrument

    SV 977D User Manual An example presentation of the markers on the time history plot is shown below. Marker 1 Marker 2 Marker 3 Marker 4 13:30:00 13:30:09 13:30:17 13:30:26 13:30:35 13:30:43 13:30:52 2.7 W ORKING WITH THE INSTRUMENT The instrument is controlled by means of nine keys on the keypad. Using these keys, one can access all available functions and change the value of all available parameters.

  • Page 22: Measurement Mode

    SV 977D User Manual 2.7.1 Measurement mode The measurement results can be viewed in different views or display modes, the set of which depend on the selected Measurement Function and which you can change and activate/deactivate. Views present some measurement results as well as additional information in the way of icons regarding: •...

  • Page 23: Configuration Mode

    SV 977D User Manual The Pause mode allows you to erase up to 16 last seconds of the measurement with the ◄ key. One press deletes one second of the measurement and this reduces also the elapsed time. It may be useful if, for example, the measurement is temporarily disturbed by ◄..◄...
  • Page 24 SV 977D User Manual If the parameter has a numerical value, you can speed up a selection by pressing the ◄ / ► key and keeping it pressed by more than 2 seconds. In this case, the parameter value starts changing automatically until you release the pressed buttons.
  • Page 25 SV 977D User Manual • You can insert or delete the position in the edited text with the ◄ / ► key pressed together with <Alt>. ► <Alt>/ • You can change the character of the selected position using virtual keyboard with available ASCII characters.

  • Page 26: Default Settings

    SV 977D User Manual Help information In most screens, the last line or several lines at the bottom of the screen contain help information. It informs how to select or modify the parameter’s value, change the character in the text line etc.

  • Page 27: Description Of Icons

    SV 977D User Manual 2.9 D ESCRIPTION OF ICONS Additional information about the instrument’s state is given by means of the row of icons visible in the top of the display. The type of measurement function and the measurement mode (SLM, VLM, S:1/1 etc.) as well as real time clock (RTC) is also...

  • Page 28: Overload And Underrange Detection

    SV 977D User Manual “lightning” “alarm” icon is displayed when an alarm icon displayed when polarisation voltage is 200V. appears. „GPS” icon is displayed when GPS is “Bluetooth” icon is displayed when the active. Colours of the icon define the state Bluetooth ®...

  • Page 29: Saving Data

    The measurement files are stored by default in the predefined SVANTEK directory. The predefined SVANTEK directory can be reassigned by the user. The setup files are stored in the predefined directory SETUP. Other special files (logs, advanced alarms settings) are stored in the predefined SYSTEM directory.
  • Page 30 SV 977D User Manual Automatic saving of logger files Files which contain the logger data are saved automatically in the SD Card memory with an extension .SVL. To enable automatic saving next conditions should be fulfilled: • SD-card should be inserted and there should be enough space on it.
  • Page 31 SV 977D User Manual name with the increased number. Pressing <ENTER> will return the instrument to the measurement screen with no results of the previous measurement and new file name in the file field. <Save> <ENT> Manual saving of Summary Results...

  • Page 32: Downloading And Uploading Files

    SV 977D User Manual steps. At the same time, you can manually save only the Summary Results for the last cycle with the use of the File Manager described above. Note: Manual saving is not possible when the instrument is measuring. If you attempt to save results, the message “Measurement in progress!”...

  • Page 33: Activating Optional Functions

    SV 977D User Manual It is recommended to use the SvanPC++ software, which provides download and upload functions as well as data viewing and data processing options. In this case, the instrument should be connected to the PC via the SC 158 USB cable.

  • Page 34: Measurement Functions And Calibration - Function

    SV 977D User Manual MEASUREMENT FUNCTIONS AND CALIBRATION – Function In the Function section, you can select a measurement mode (Mode) which relates to the transducer type, a measurement function (Measurement Function) and perform the instrument check or calibration (Calibration).

  • Page 35: Calibrating The Instrument - Calibration

    SV 977D User Manual Mode: Sound Meter Mode: Vibration Meter Sound Level Meter, Vibration Level Meter, S:1/1 Sound 1/1 Octave, V:1/1 Vibration 1/1 Octave, S:1/3 Sound 1/3 Octave, V:1/3 Vibration 1/3 Octave, S:FFT Sound FFT, V:FFT Vibration FFT. RT60 RT60, Tonality STIPA.

  • Page 36: System Check

    SV 977D User Manual 3.3.1 System Check The IEC 61672-1:2013 standard advises users to perform in-situ checks of measuring instruments. Checking should be carried out immediately before and after the measurement. 1. Open the System Check position. 2. Set the reference calibration level (Cal. Level).

  • Page 37: Calibration By Sensitivity (Vibration Signal)

    SV 977D User Manual For microphones with sensitivity over 35.0 mV/Pa, the calibration factor will be negative. For microphones with sensitivity less than 35.0 mV/Pa, the calibration factor will be positive. The lowest available value of the sensitivity that can be introduced is equal to 35.0 µV/Pa (it conforms to the calibration factor equal to 60.0 dB) and the...

  • Page 38: Calibration By Measurement (Vibration Signal)

    SV 977D User Manual 4. Switch on the calibrator (if the used calibrator doesn’t have auto run function) and wait approximately 30 seconds for the tone to stabilise before starting the calibration measurement. 5. Start the calibration measurement by pressing the <Start> key.

  • Page 39: History Of Performed Calibrations - Calibration History

    SV 977D User Manual During the calibration measurement, the level of the measured calibration signal is displayed. If the maximal difference between three 1-second consecutive results (RMS(HP10)) is less than 0.05dB, the calibration measurement will be stopped, and the calibration factor calculated. The measurement can be always stopped by the <Stop>...

  • Page 40: Automatic Calibration - Auto Calibration

    SV 977D User Manual After erasing calibration records, the Calibration History screen will not contain any previous calibration records. The content of this screen is also cleared after the Factory Settings operation (path: <Menu> / Auxiliary Setup). Note: Acoustic and vibration calibration histories are independent files in the internal instrument’s memory and erasing the calibration history in one mode does not erase it in another mode.

  • Page 41: Configuring Measurement Parameters - Measurement

    SV 977D User Manual CONFIGURING MEASUREMENT PARAMETERS – Measurement The Measurement section groups items of menu related configuration measurement parameters. <ENT> The Measurement list contains the following positions: General Settings allowing you to set general measurement parameters, Measurement Trigger allowing you to set the measurement trigger,...

  • Page 42: Setting General Measurement Parameters - General Settings

    SV 977D User Manual Any parameter in the Measurement list can be changed only when the instrument is not currently executing a measurement. The parameters are displayed with grey colour. The blinking „measurement” icon indicates that the instrument is performing a measurement.
  • Page 43 SV 977D User Manual Integration period The Integr. Period parameter defines a period during which the signal is being measured (and some results averaged/integrated) and a step with which measured results are logged in the logger file as Summary Results (see description of the ►...

  • Page 44: Setting The Measurement Trigger - Measurement Trigger

    SV 977D User Manual Selecting Lin is required for obtaining the true RMS value of the measured signal (according to IEC 61672- 1:2013 for sound measurements). When this option is selected the RMS based results do not depend on the detector time constant, defined in the Profiles screen (path: <Menu>...
  • Page 45 SV 977D User Manual The triggering is switched on if any trigger type is chosen in the Trigger position: Slope +, Slope –, Level +, Level –, Grad + or External. When the trigger is selected, additional parameters can be defined: the measurement result that is checked for a trigger condition (Source), its threshold value (Level) and the rate of its changing (Gradient).

  • Page 46: Setting Parameters For Profiles - Profiles

    SV 977D User Manual Note: When a measurement is waiting for the level trigger the “level” icon appears alternatively with the „measurement” icon. Gradient trigger The Grad + trigger starts the 1-second measurement/integration on condition: value of the measured result (Source) averaged by 0.5 ms is greater than the threshold value (Level) and the gradient of this Source is greater than the gradient threshold value (Gradient).

  • Page 47: Configuring Data Logging - Logging

    SV 977D User Manual Weighting filter Sound measurements: • according to IEC 61672-1:2013 for Class 1, • according to IEC 651 and IEC 61672-1:2013 for Class 1, • according to IEC 651 and IEC 61672-1:2013 for Class 1, • according to IEC 651 for Class 1, •...
  • Page 48 SV 977D User Manual The instrument enables also additional registration of some results with different step defined by the Logger Step parameter (path: <Menu> / Measurement / Logging / Logger Setup). Therefore, it is possible to save in parallel two sequences of measured results – one for Summary Results and another for so called Logger Results.

  • Page 49: Setting Logger General Parameters - Logger Setup

    SV 977D User Manual 4.4.1 Setting logger general parameters – Logger Setup The Logger Setup list enables activating the logger function and programming logging general parameters. If Logger is disabled only Summary Results Wave Recording positions accessible in the Logging list.

  • Page 50: Selecting Results For Logging - Logger Results

    SV 977D User Manual In other cases, registration will be carried out in separate files and the registration in the new file will start after expiration of integration period (Integr. Period), or at every quarter of the RTC (Sync. to 15m), or at every half an hour of the RTC (Sync.

  • Page 51: Selecting Additional Summary Results For Saving - Summary Results

    SV 977D User Manual 4.4.3 Selecting additional summary results for saving – Summary Results The Summary Results list allows you to include/exclude logging of some summary results, like: Statistics, Meteo, Statistics Spectrum, Max Spectrum Min Spectrum for Sound measurements and Meteo, Max Spectrum and Min Spectrum for Vibration measurements.

  • Page 52: Setting Markers - Marker Setup

    SV 977D User Manual Threshold level The threshold value (Level) can be set with 1 dB steps in the range from 24 dB to 136 dB in sound mode and from 1 mm/s (60 dB) to 10 km/s (200 dB) in vibration mode.

  • Page 53: Configuring Signal Recording - Wave Recording

    SV 977D User Manual The Trig column becomes active only when Trigger on Marker (path: <Menu> Measurement / Logging / Wave Recording) is enabled. Switching on Trig for some markers means, that wave recording will be triggered by activating one of these markers.
  • Page 54 SV 977D User Manual Wave Trigger When Trigger on Marker is switched on, a wave recording will start by initiation of one of the markers. Markers for triggering are defined in the Markers Setup screen. The Trigger parameter defines additional wave recording trigger, which can be disabled (Off) or enabled by selecting the trigger type: Slope +, Slope -, Level +, Level –, External, Integr.
  • Page 55 SV 977D User Manual Note: When a signal recording is waiting for the level trigger the “level” icon appears alternatively with the „wave” icon. External trigger When External is selected, recording starts from the external signal on the I/O socket. In this case, it is necessary to set up the I/O Mode parameter as Digital In (path: <Menu>...

  • Page 56: Selecting Microphone Compensation - Compensation

    The Free Field and Diffuse Field positions are intended to compensate the instrument frequency response in the free field or diffuse field conditions. The microphone supplied with SV 977D is designed for sound measurements in the free field conditions. The Free Field option means that the correction filter for the diffuse field conditions is switched off.

  • Page 57: Selecting The Measuring Range - Range

    SV 977D User Manual – R 4.6 S ELECTING THE MEASURING RANGE ANGE The Range position is used for selecting the measuring range of the instrument. The Range screen presents for the selected range: Leq linearity range, Leq dynamic range and Peak range for 1 kHz.

  • Page 58: Setting The Workday Exposure Time - Exposure Time

    SV 977D User Manual The Pulses/Revolution parameter defines the number of pulses per one rotation. Available values are in the range: 1..360. The Unit parameter defines units of measure. Two options are available: revolutions per minute (rpm) or revolutions per second (rps).

  • Page 59: Example Of Timer Execution

    SV 977D User Manual In the case the timer is active (Single or Multiple) and the instrument is switched on the “clock” icon appears until finishing the programmed measurements. The Start Hour position determines the time for the measurement to start. The required hour and minute can be selected in a special screen, which is opened with the ◄...

  • Page 60: Advanced Alarm Function - Alarms

    SV 977D User Manual It is recommended to set the Start Delay time to 0 seconds for the Timer function. – A 4.11 A DVANCED ALARM FUNCTION LARMS position appears Alarms Measurement list in the case the advanced alarms configuration file (ALARM.SVA) is...

  • Page 61: Configuring Data Viewing - Display

    SV 977D User Manual CONFIGURING DATA VIEWING – Display The Display section contains elements for programming presentation of measurement result and display parameters. The content of the Display list depends on selected measurement function. <ENT> The Display section contains following items:...

  • Page 62: Running Spl View

    SV 977D User Manual 5.1.1 Running SPL view The Running SPL view is available in the Sound measurement modes. It shows in a large format one measured result – SPL for the selected profile (Leq with the weighting filter and detector constant defined in the Profiles screen for the last second).

  • Page 63: Combined Views

    SV 977D User Manual Changing field content The content of some fields can be changed with the ◄ / ► key together with <Alt>. <Alt/►> Changing active fields You can change the active field with the ◄ / ► or ▲ / ▼ keys.
  • Page 64 SV 977D User Manual Note: Detector type for the displayed result depends on settings in General Settings and Profiles lists (path: <Menu> / Measurement). There is no displayed indication of the detector in case of Peak, P-P and Ovl results (see Appendix D).

  • Page 65: Logger View

    SV 977D User Manual Changing active fields You can change the active field with the ▲ / ▼ (vertically) or ◄ / ► (horizontally) key. ▼ 5.1.4 Logger view The Logger view depends on settings made Logging list (path: <Menu>...

  • Page 66: Spectrum View

    SV 977D User Manual To display a different result, it is necessary to move to field 3 with the ▲/▼ button, and then select the appropriate result with the ◄/► button pressed together with <Alt>. <Alt>+► 5.1.5 Spectrum view The Spectrum position is accessible only in the active 1/1 Octave, 1/3 Octave or FFT functions.

  • Page 67: Meter Table View

    These results are available when SV 977D is a part of the SV 277 PRO monitoring station and when the Meteo module is connected to =>...

  • Page 68: Adjusting Graph Views - Display Scale

    SV 977D User Manual – D 5.2 A DJUSTING GRAPH VIEWS ISPLAY CALE The Display Scale list of parameters allows you to define the result units (absolute or logarithmic), number of digits after decimal point, decimal mark, adjust scale of charts and toggle a grid.

  • Page 69: Customizing The Logger View - Logger View

    SV 977D User Manual Switching grid on/off The Grid position allows you to toggle the horizontal grid lines of the logger or spectrum graph. => Decimal Mark The Decimal Mark position allows you to select which decimal mark (point or comma) will be used for data presentation in all presentation modes.

  • Page 70: Customizing The Colour Theme Of The Display - Themes

    SV 977D User Manual Power saver The saving of the internal source of the instrument’s power can be achieved by reducing the brightness of the screen when possible. There are two options for the power saver function. The screen may be switched off (Screen off on idle) and/or dimmed (Dim screen on idle).

  • Page 71: Managing Files - File

    SV 977D User Manual MANAGING FILES – File The File section contains elements that enable managing measurement and setup files saved in the instrument’s memory (micro- SD card). The memory structure and files saving methods are described in Chapter 2.11.

  • Page 72: Managing Instruments Files - File Manager

    SV 977D User Manual ’ – F 6.1 M ANAGING INSTRUMENT S FILES ANAGER Files are stored in directories, which are organised hierarchically. File Manager enables access to all files and directories. <ENT> In the File Manager screen, you can check...

  • Page 73: Opening Files/Directories - Open

    SV 977D User Manual 6.1.2 Opening files/directories – Open You can open a directory or a logger file. To do this, select the file/directory and press <ENTER>. After opening the command list, select the Open command and press <ENTER>. The effect of such operation on a directory is similar to the effect of the ►...

  • Page 74: Renaming Files/Directories - Rename

    SV 977D User Manual If the Delete All command is performed in a root directory, all files and directories in this root directory will be erased. After this operation three directories will be created as default directories: SETUP, SVANTEK and SYSTEM.
  • Page 75 SV 977D User Manual Saving setup files It is possible to save only current instrument’s settings. To save current settings in the setup file, press <ENTER> on the Save Setup position and edit the setup file name in the text editor screen.

  • Page 76: Configuring Instrument Parameters - Instrument

    SV 977D User Manual CONFIGURING INSTRUMENT PARAMETERS – Instrument The Instrument section is mainly related to the configuration of the hardware components of the instrument. <ENT> The Instrument section contains following positions: Auto Start allowing you to start the measurement automatically just after turning the...

  • Page 77: Setting The Interface Parameters - Communication Ports

    SV 977D User Manual When the instrument is powered from a set of internal batteries you should select the correct battery type (Alkaline or Rechargeable). It is essential for the right detection of the capacity of the battery pack. – C...

  • Page 78: Setting The External Power On/Off Conditions - External Power

    SV 977D User Manual – E 7.4 S ETTING THE EXTERNAL POWER FF CONDITIONS XTERNAL OWER The External Power position allows you to set the minimum voltage of the external DC power source, when the instrument should be switched off automatically (Power Off) or the...

  • Page 79: Setting The I/Oport Parameters - Multifunction I/O

    SV 977D User Manual – M 7.7 S ETTING THE PORT PARAMETERS ULTIFUNCTION The Multifunction I/O position allows you to program the functionality of the I/O port (3.5 mm jack socket). <ENT> The I/O jack socket can be used as (I/O Mode): •...
  • Page 80 SV 977D User Manual Polarisation of digital output trigger pulse The Polarisation parameter defines the output trigger pulse polarisation: Negative or Positive. Active level of alarm pulse The Active Level parameter defines which level of the signal should be treated as a valid one: Low or High (“negative”...

  • Page 81: Programming The Instruments Internal Real Time Clock - Rtc

    IRELESS RANSFER The SV 977D instrument is not equipped with the modem and itself cannot assure data transfer via the cellular network. However, it can control data transfer via the modem that supports the cellular connection with the help of the Wireless Transfer functionality. Such solution is used in the SV 277 monitoring stations. The connection with the SV 277 modem is carried out via the USB port.

  • Page 82: Checking Instrument Properties - Unit Label

    ▲ / ▼ key. <ENT> Note: The contents of the Unit Label screen should be always sent to the Svantek service department or official representative in case of any problems faced by the user during the instrument’s...

  • Page 83: Auxiliary Settings - Auxiliary Setup

    SV 977D User Manual AUXILIARY SETTINGS – Auxiliary Setup Auxiliary Setup section provides additional functions that allow, for instance, customization of the device interface to a specific user requirement and are not directly related to the hardware components of the instrument.

  • Page 84: Setting The Reference Levels - Reference Levels

    SV 977D User Manual – R 8.3 S ETTING THE REFERENCE LEVELS EFERENCE EVELS The Reference Levels position allows you to set reference levels for the measured acceleration (Acc), velocity (Vel) displacement (Dil) results. sound measurements it only informs about the default reference sound level.
  • Page 85 SV 977D User Manual process. If Save option is chosen, then the measurement results are saved and after saving the instrument returns to the active measurement view and starts the new measurement process. Checking free space of the memory If the Ext. Disk Free Space warning is enabled the instrument will verify free space on the SD-card and will generate the warning when the space is lower than Min Free Space.

  • Page 86: Printing Reports - Report

    SV 977D User Manual PRINTING REPORTS – Report The Report section allows you to print reports of the Sound or Vibration Summary results for the last measurement cycle in the predefined format on the printers directly connected to the SV 977D instrument.
  • Page 87 SV 977D User Manual 26 Mar 2020 10:23:52 Mode: Sound Meter Function: Level Meter Comp. Filt: Off Range: Low Meas. Time: 00:00:01 Peak (1): 66.01dB (1): 56.40dB (1): 56.36dB (1): 56.40dB (1): 56.38dB (1): 56.38dB (1): 56.38dB LEPd (1): 56.38dB Ltm3 (1): 56.40dB...
  • Page 88 SV 977D User Manual L70 (1): 56.3dB L80 (1): 56.2dB L90 (1): 56.1dB L95 (1): 56.0dB L10 (2): 54.9dB L20 (2): 54.8dB L30 (2): 54.7dB L40 (2): 54.6dB L50 (2): 54.5dB L60 (2): 54.4dB L70 (2): 54.3dB L80 (2): 54.2dB L90 (2): 54.1dB...

  • Page 89: 10 1/1 Octave And 1/3 Octave Analyser

    SV 977D User Manual 10 1/1 OCTAVE AND 1/3 OCTAVE ANALYSER The instrument operates as a real-time 1/1 octave or 1/3 octave analyser in a very similar way to the level meter. Moreover, 1/1 octave or 1/3 octave analysis is performed in parallel with the level meter measurements. All digital band-pass filters (sixteen 1/1 octave filters with centre frequencies from 31.5 kHz down to 1.0 Hz and...

  • Page 90: Configuring The 1/1 Octave Or 1/3 Octave Analyser

    SV 977D User Manual 10.2 C ONFIGURING THE OCTAVE OR OCTAVE ANALYSER 10.2.1 General measurement settings for 1/1 or 1/3 octave analysis – General Settings Execution of the 1/1 octave or 1/3 octave analysis depends on a certain set of parameters, configured in the Measurement section.
  • Page 91 SV 977D User Manual Band The Band parameter defines the band of 1/1 octave or 1/3 octave analysis. Available bands of the sound analysis are as follows: • 1/1 Octave: Audio (31.5-16k) - 10 filters with centre frequencies from 31.5 Hz to 16 kHz =>...
  • Page 92 SV 977D User Manual Available bands of the vibration analysis are as follows: • 1/1 Octave: Full (1-16k) - 15 filters with centre frequencies from 1 Hz to 16 kHz => Ultra (1-31.5k) - 16 filters with centre frequencies from 1 Hz to 31.5 kHz =>...

  • Page 93: Customizing 1/1 Or 1/3 Octave Spectra Views

    SV 977D User Manual RMS detector The Detector parameter defines the RMS detector for the 1/1 octave or 1/3 octave bands and Total values. For Sound measurements, it is possible to select the Linear, Fast or Slow detector. For Vibration measurements, only Linear detector is available.

  • Page 94: Customizing The Spectrum Graph - Display Scale

    SV 977D User Manual Spectrum view fields 1. Analyser function 2. Cursor position 3. Value of the cursor position 4. Averaging used 5. Spectrum plot 6. Frequency weighting filter 7. Total values 8. Central frequency for the cursor position You can shift the Y-axis in the spectrum view with the <Shift>...

  • Page 95: Selecting The Spectra To Be Viewed - Spectrum View

    SV 977D User Manual Note: In Vibration modes, results can be presented in the Logarithmic (dB) or Linear (for example, ) units. It depends on the Scale parameter value. For example, 10 m/s can be presented also as 140 dB.
  • Page 96 SV 977D User Manual • Instantaneous, obtained Leq/RMS results integrated for 100 ms, • Averaged, obtained as averaging of instantaneous spectra for the elapsed time [0, Integration Period], • Max, obtained maximum ► instantaneous spectrum for the elapsed time [0, Integration Period] or •...

  • Page 97: Changing The Spectrum Type In Vibration Modes - Spectrum Type

    SV 977D User Manual 10.3.4 Changing the spectrum type in Vibration modes – Spectrum Type In the Spectrum Type screen, which is available only in Vibration modes, you can select the different types of vibration spectra to be presented in the Spectrum view: Acceleration, Velocity or Displacement.
  • Page 98 SV 977D User Manual 6. Select the 1/1 Ln or 1/3 Ln field with the ▲ / ▼ key. 7. Activate the statistics view for the selected 1/1 or 1/3 band, changing the field content to the 1/1 Ln’s or 1/3 Ln’s with the ◄...

  • Page 99: Fft Analyser

    SV 977D User Manual 11 FFT ANALYSER The instrument operates as the FFT analyser in a very similar way to the Level Meter. Moreover, the FFT analysis is performed in parallel with the SLM or VLM measurements. Results of the FFT analysis (spectra) measured with preselected frequency weighting filter and window, are presented in the Spectrum view.

  • Page 100: Logging Of Fft Spectra - Logging

    SV 977D User Manual 11.2.3 Logging of FFT spectra – Logging Spectra can be logged in a logger file with two steps: Integration Period step and/or Logger Step. For logging FFT spectra, the Logger position must be enabled in the Logger Setup screen (path: <Menu>...

  • Page 101: Customizing The Fft Spectra View

    SV 977D User Manual The Window parameter defines the weighting window for the FFT analysis: Hanning, Rectangle, Flat Top or Kaiser-Bessel. The Lines parameter defines the number of lines for the FFT analysis: 1600, 800 or 400. There are two averaging options (Averaging):...

  • Page 102: Customizing The Spectrum Graph - Display Scale

    SV 977D User Manual Spectrum view fields 1. Analyser function 2. Cursor position 3. Value for the cursor position 4. Averaging used 5. Spectrum plot 6. Frequency weighting filter 7. Total value 8. Line frequency for the cursor position You can shift the Y-axis in the spectrum view with the <Shift>...

  • Page 103: Selecting The Spectra To Be Viewed - Spectrum View

    SV 977D User Manual and the measurement results are expressed in decibels (the result is related to the values set in the Reference Levels screen (path: <Menu> Auxiliary Setup Reference Levels). => Note: In Vibration modes, results can be presented in the Logarithmic (dB) or Linear (for example, ) units.

  • Page 104: Changing The Spectrum Type In Vibration Modes - Spectrum Type

    SV 977D User Manual When the Averaged or Instantaneous spectrum is selected, you can additionally switch on or off the presentation of the Max and/or Min values by switching the Max or Min parameters on. => To enable reading of the Max or Min values...

  • Page 105: Measurement Of Reverberation Time - Rt60

    C and Z weighted). Whole measurement process and calculations implemented in SV 977D fulfil the ISO 3382 standard. The reverberation time of the room can be obtained with the use of SV 977D by two measurement methods: Impulse Response Method (Impulse) and Interrupted Noise Method (Decay). The selection of the method depends on the type of the used sound source.
  • Page 106 SV 977D User Manual The RT60 Settings list allows you to select the method for RT60 calculations, define the name of the file, where the registered data will be collected, and other parameters for RT60 calculations. The Start Delay parameter defines the delay period from the moment the <Start>...
  • Page 107 SV 977D User Manual To make averaging of the new results with the results calculated earlier, select the field Averaging and press <ENTER>, select in the confirmation screen Yes and press <ENTER> again. In the field No.: x, the value x will be increased by one and the symbol ...

  • Page 108: Customizing The Rt60 View

    SV 977D User Manual The Level position defines the threshold level of the sound source for triggering the RT60 measurement. If the measured sound is below the Level value, the RT60 measurement will not start. The parameter can be set in the range 24 ÷...
  • Page 109 SV 977D User Manual Place the sound power source in the measured room (for the sound power source location - see the reverberation time measurement ISO standard). Place the microphone in one of the selected measurement points (for the measurement points location see the reverberation time measurement ISO standard).

  • Page 110: Viewing The Rt60 Results

    SV 977D User Manual Start the measurement process with the <Start> key. The display indicates that the instrument is waiting for the trigger condition fulfilment. Fire the impulse sound power source. If the trigger condition is fulfilled the instrument starts to collect data.
  • Page 111 SV 977D User Manual Bar plot of RT60 results 1. Number of averaged results 2. RT 1/3 octave plot 3. Name of the RT result and its value 4. Used RT60 calculation method 5. Cursor position 6. RT results for Total values 7.
  • Page 112 SV 977D User Manual Changing data type When the field 9 is active the type of data displayed (Raw, Smoothed or Integrated) can be changed with the ◄ / ► key pressed together with <Alt>. ► <Alt/ > Changing band When the field 4 is active the central frequency of the band can be changed with the ◄...

  • Page 113: Measurement Of Speech Transmission Index - Stipa

    STIPA calculations are realized in SV 977D in accordance with IEC 60268-16:2011. Note: In addition to the fact that measurements can be made using only SV 977D, Svantek also provides an application (BA Assistant) for mobile devices (smartphone, tablet) with Android 7.0 platform or higher, which performs STIPA measurements using SV 977D but has a more convenient user interface (see BA Assistant User Manual).

  • Page 114: Stipa Measurement And Calculation Process

    SV 977D User Manual 13.4 STIPA MEASUREMENT AND CALCULATION PROCESS STI measurements usually relate to objects (buildings), which may consist of several areas (rooms) in which measurements are made in a given number of points (in practice, from 1 up to several dozen). In addition, especially in case of assessing speech intelligibility in a room on the directly, i.e.
  • Page 115 SV 977D User Manual • Area summary view - main STIPA view that presents summary results for the current area: Averaged STI (or CIS) index with consideration of the Ambient noise distortions. σ - standard deviation of measured STI indexes for the tested area.

  • Page 116: Project Structure

    SV 977D User Manual 13.4.2 Project structure Speech intelligibility measurements are organized in the structure of projects. The name of the project is equal to the name of the directory in the instrument’s memory. Its subdirectories have names of tested areas. Next down level directories have names of test signal positions (so called sources).

  • Page 117: Averaging Results

    SV 977D User Manual Every time you start a new measurement with the <Start> key, a new file will be created and saved in the point directory after the measurement is completed. If you break the measurement with the <Stop> key, the measurement file will not be created.
  • Page 118 SV 977D User Manual 2. Being at the Project position, press the ► key and, in the Select Project screen, select New Directory to create a new project directory or select the directory of the previously created Project and press <ENTER>.

  • Page 119: Considering Ambient Noise Distortions

    SV 977D User Manual 5. Select the Averaging type: Manual or Auto. Manual averaging means that you may perform as many measurements for the measurement point as you need, and you will decide when to stop series of measurements using ►...

  • Page 120: Stipa Measurements

    SV 977D User Manual To set the ambient noise, select the 1/1 octave band and with the ◄/► key, set the required value. ► In the Enabled position, you can enable or disable the consideration of ambient noise for subsequent measurements.
  • Page 121 SV 977D User Manual 4. To finish measurement series for the measurement point, should complete them pressing <Completed> soft-key. The instrument switches to the Area view. <ENT> Note: In case of automatic averaging the series of measurements will be completed automatically after meeting the conditions specified in the selected standard.

  • Page 122: Downloading Files And Processing Data

    13.5 D OWNLOADING FILES AND PROCESSING DATA The measurement files created during the STIPA measurements by SV 977D can be download and analysed with the use of SvanPC++ software. The SvanPC++ software allows you to download files and analyse measurement data made with the use of the...

  • Page 123: Measurement With Ba Assistant

    13.5.1 Measurement with BA Assistant BA Assistant is an application for mobile devices (smartphones, tablets) with the Android 7.0 or newer operating system that uses Svantek measuring instruments to measure the building acoustics, including STIPA speech intelligibility. After taking measurements using BA Assistant a project (zip file containing files with the results obtained during the measurement) will be automatically copied to the measuring instrument.
  • Page 124 SV 977D User Manual If you downloaded a file, you can open it with a double-click, if you downloaded the whole folder, you need to link the downloaded data set. The easiest way for this is to use the SvanPC++ project functionality.

  • Page 125: Presentation Of Stipa Results

    SV 977D User Manual 13.5.3 Presentation of STIPA results The STIPA results are grouped in one window with the appropriate division into areas, sources and points for the selected project. When opening a project from the BA Assistant application or creating a "Simple project" project in SvanPC++, the STIPA window will open automatically.

  • Page 126: Changing Background Noise Values

    SV 977D User Manual 13.5.4 Changing background noise values The cells with the background noise results are editable, i.e. you can manually enter values for individual octaves (just double click on the selected background noise value). Such a change will automatically convert the results for a point and above.

  • Page 127: Measurement Of Tones - Tonality

    SV 977D User Manual 14 MEASUREMENT OF TONES – Tonality The instrument assesses the audibility of tones based on the next standards: • ISO 20065:2016, • ISO 226:2003, • ISO 226:1987. See Appendix F Note: It is recommended to familiarize with the Appendix F before proceeding. This chapter describes only the navigation of the instruments, whereas Appendix F describes the Objective Method for Assessing the Audibility of Tones in Noise –...
  • Page 128 SV 977D User Manual For the ISO 20065-16 standard, you can choose the measurement Mode: Auto or Manual, and the maximum number of measurements (Number of Meas.). In the Auto mode, the measurements are performed one by one without pauses after pressing the <Start>...
  • Page 129 SV 977D User Manual Settings for the standards are shown in the below table. Parameters that can be changed are in red. Standard Description Parameters Outcome ISO 20065-16 Spectrum: FFT FFT spectrum View and the Tonality results Table. Band: 5kHz...

  • Page 130: Tonality Measurements

    SV 977D User Manual 14.3 T ONALITY MEASUREMENTS The instrument performs Tonality measurements together with SLM measurements. To start measurements, press the <Start> key. If you use the ISO 226-2003 or ISO 226-1987 standards, each press of the <Start> key will start series of measurements defined by the Cycles parameter, which the user can set.
  • Page 131 SV 977D User Manual 1/3 octave results In the left example, the most pronounced tone can be seen (yellow colour) as well as additional tones (1/3 bandwidths) are marked by orange colour. equal-loudness level contour corresponding to the highest tone in the...

  • Page 132: 277 Monitoring Stations

    SV 977D User Manual 15 SV 277 MONITORING STATIONS The SV   2 77     t ype outdoor monitoring stations based on the SVAN     9 77 instrument and SA 277 outdoor microphone kit are recommended short term semi-permanent noise measurement in the environment.

  • Page 133: Remote Communication Settings - Wireless Transfer

    SV 977D User Manual 3. You must Outdoor Environment Outdoor Airport compensations since the monitoring station uses the SA 277 outdoor microphone kit. The characteristics of the outdoor filters depend on the dominating sound incidence angle: environmental monitoring (incidence angle 90 deg) or airport monitoring (incidence angle 0 deg) (path: <Menu>...

  • Page 134: Configuring Modem Basic Settings - Modem

    SV 977D User Manual If the GPRS network is selected the Wireless Transfer screen will have additional positions enabling configuring GPRS connection: Modem, Modem Connection, SMS Options and E-mail Settings. 15.2.2 Configuring modem basic settings – Modem The Modem position allows you to configure modem and data transmission settings.

  • Page 135: Configuring Connections - Modem Connection

    SV 977D User Manual • Reconnection Delay – defines time between each reconnection attempts. • TCP IRT - defines TCP Initial Retransmission Timeout. In some cases, extending this timeout may be helpful in case of slow connections, but the default setting is recommended.

  • Page 136: Configuring Sms Service - Sms Options

    SV 977D User Manual • DynDns Address, DynDns Hostname, DynDns Login DynDns Password - allow you to define the server and login information when using DynDNS service in case of dynamic IP address. Edition of each position is performed in the special screen with the text editor function, which is opened with the ◄...
  • Page 137 SV 977D User Manual • E-mail Subject – allows you to enter up to 20 characters of the message's subject. • E-mail Message – allows you to enter up to 20 characters of additional text which will be appended to standard e-mail message template used for alarm notification.

  • Page 138: Remote Control And Data Processing Tools

    Play Store application. When SV 977D is a part of the SV 277 monitoring station it can be controlled via the cellular connection. Cellular connection opens wider possibilities for remote communication. There are two communication options for the cellular connection, which depend on the Internet access, provided by cellular operators.

  • Page 139: Maintenance

    17.1 R EPLACING BATTERIES SV 977D is delivered with four AA alkaline batteries, but you may also use AA rechargeable batteries. The “battery” icon shows the condition of the internal batteries. The instrument is not equipped with an internal charger; therefore, the rechargeable batteries can be charged only with the use of optionally provided charger (SA 31) after removal them out of the instrument.
  • Page 140 ) with the SC 27 2 m coiled cable can be used. The SV 80 is an industry standard IEPE accelerometer offered for SV 977D. It is an ideal choice for walk-around measurement points in the rugged environments of industrial machinery monitoring, such as pumps, motors or fans.

  • Page 141: Resetting Instrument

    - will stop any pre-programmed auto-run modes, - will stop measurement run! 17.5 F IRMWARE UPGRADE SVANTEK is committed to continuous innovation path of development, and as such reserves the right to provide firmware enhancements based on user’s feedback. To update the instrument firmware: •...

  • Page 142: Cleaning

    Chapter 17.4). • In case the reset does not help call your Local Authorized Distributor or Svantek Service Office. Should your SVANTEK professional measurement equipment need to be returned for repair or for calibration, please contact the service office at the following number or contact via the SVANTEK website.

  • Page 143: Glossary

    SV 977D User Manual 18 GLOSSARY 18.1 M ODES AND EASUREMENT UNCTIONS Name Description Screen Reference menu section enabling selection Chapter Function measurement Mode, Measurement Function perform Calibration of the instrument. Mode Mode of the instrument operation defined by the...

  • Page 144: Calibration

    SV 977D User Manual 1/3 Octave Measurement Function enabling calculation Chapter Level Meter results and 1/3 octave results for sound or 3.2, vibration measurements in accordance with Class 1 IEC 61260-1: 2014. 1/3 octave results are presented as a spectrum plot - a function of result vs central band frequency and can be saved as a time-history.
  • Page 145 SV 977D User Manual Type of calibration with the use of microphone’s Calibration by Chapter published sensitivity information. This calibration doesn’t Sensitivity 3.3.2, 3.3.3 perform any calibration measurement and doesn’t require any calibrator. Transducer’s sensitivity, given by the producer, which...

  • Page 146: Measured Results

    SV 977D User Manual Post Calibration Feature that enables performance additional Chapter calibration in the end of the measurement session and 3.3.9 add the new calibration factor to some files already saved in the instrument’s memory. 18.3 M EASURED RESULTS...
  • Page 147 SV 977D User Manual Equivalent continuous sound level, time-averaged sound Appendix D level for the elapsed measurement time (equivalent D.1.2 sound level). Rolling (sliding) Leq screen for the last m minutes of Chapter measurement (m x 60 seconds) moving with 1 second step.

  • Page 148: Measurement Parameters

    SV 977D User Manual Standard deviation. Calculated on the basis of 100ms Appendix D RMS results. D.1.2 Appendix D Noise Rating, measured noise level that takes into account the frequency content of the noise. D.1.2 NR is calculated if 1/1 Octave function is active.
  • Page 149 SV 977D User Manual Start Delay Delay between pressing the <Start> key and the start of Chapter measurement integration. Synchronization of the measurement/integration start to Chapter Start Synch. the nearest full minute or hour of the instrument real-time clock. It helps to measure in full cycles.
  • Page 150 (e.g. laboratory calibration measurements). Free Field This option should be selected for sound measurements Chapter in the free field conditions. The microphone supplied with SV 977D is designed for sound measurements in the free field conditions.
  • Page 151 SV 977D User Manual Diffuse Field Digital filter that compensates the diffuse field effect. Chapter Digital filter that compensates the effect of the SA 277D Chapter Outdoor Environment outdoor microphone kit in the free field for the reference acoustic wave incidence angle 90 deg.
  • Page 152 SV 977D User Manual Measurement Screen that enables configuring trigger Chapter measurement/integration process with parameters: Trigger Trigger, Source, Level and Gradient. Position that switches Off or on the measurement trigger Chapter Trigger by selecting its type: Slope +, Slope –, Level +, Level –, Grad + or External.
  • Page 153 SV 977D User Manual External Type of trigger that starts the measurement/integration Chapter when the trigger signal appears on the I/O socket of the instrument. After the measurement/ integration start from the trigger, the measurement/integration will continue by the Integration Period.
  • Page 154 SV 977D User Manual Logger Setup Screen that enables setting the main logging parameters: Chapter Logger, Summary Results, Logger Step, Logger Name 4.4.1 and Split. Position in the Logger Setup list that switches on or off Chapter Logger the Logging function.
  • Page 155 SV 977D User Manual Logger Trigger Screen that enables configuring parameters Chapter triggering of Logger Results recording to the logger file: 4.4.4 Trigger, Source, Level, Pre and Post. Position that switches Off or On the logger trigger by Chapter Trigger selecting its type: Level + or Level –.
  • Page 156 SV 977D User Manual Wave Rec. Switching on the wave recording by selecting its type: Chapter Continuous or On Trigger. Continuous means that the 4.4.6 wave signal will be recorded continuously from the start of the measurement till its end. On Trigger recording put additional conditions for triggering and ending of the recording.
  • Page 157 SV 977D User Manual Slope - Type of trigger that starts the wave recording for Chapter Recording Time on condition: falling value of the 4.4.6 Leq/RMS result (Source) integrated during Trigger Period passes below the threshold value (Level). Type of trigger that starts the wave recording for...
  • Page 158 SV 977D User Manual Recording Time Time of signal recording after meeting every trigger Chapter condition. The available values can be selected from 1s 4.4.6 to 8h or Infinite. Recording stops after Recording Time or earlier if the measurement is stopped manually.
  • Page 159 SV 977D User Manual Screen that enables setting the FFT spectrum Chapter parameters: Band, Filter, Screen, Lines and Averaging. 11.2.4 Frequency band in which the FFT analysis is performed: Chapter Band 20 kHz, 10 kHz, 5 kHz, 2.5 kHz, 1.25 kHz, 625 Hz, 11.2.4...
  • Page 160 SV 977D User Manual Method Method of the RT60 calculation: Decay (Interrupted Chapter Noise Method) or Impulse (Impulse Response Method). 12.2 The selection of the method depends on the used type of the sound source. Appendix E Method of RT60 calculation that uses the impulse sound...
  • Page 161 SV 977D User Manual Noise Mar. Margin value to the calculated noise level for RT60 Chapter calculations: 0 ÷ 20 dB. 12.2 Appendix E Name of the Logger file in which data of the RT60 Chapter Logger Name analysis will be recorded.
  • Page 162 SV 977D User Manual Project Position enabling selecting the catalogue in the Chapter instrument memory which contains Area catalogues. 13.4.4 Position enabling selecting the catalogue in the Chapter Area instrument memory which contains Source catalogues. 13.4.4 Source Position that enables selecting the catalogue in the...

  • Page 163: Display Parameters

    SV 977D User Manual Alarm Conditions List of alarm conditions. Alarm condition can be a Chapter Threshold or Time type. 4.11 Alarm condition type. Alarm is generated if the selected Chapter Threshold result (Leq, Lpeak, Lmax, Lmin or sliding Leq for screens 4.11...
  • Page 164 SV 977D User Manual Running SPL Mode of the running SLP result view in Sound Chapter measurement modes. This mode is used for the noise view 5.1.1 level estimation before the measurement start. Single Profile Mode of the one result view. This mode is always...
  • Page 165 SV 977D User Manual GPS view Presentation of GPS information: Status, Latitude, Chapter Longitude, Altitude, Speed, Time and Date. 5.1.8 Presentation of results from weather station: ambient Chapter Meteo view temperature and pressure, humidity, wind speed, wind 5.1.10 direction and rain intensity.
  • Page 166 SV 977D User Manual Dynamics Range of the plot scale: 10dB, 20dB, 40dB, 80dB, 100dB Chapter and 120dB. Grid swither on or off during the time history or spectrum Chapter Grid presentation. Decimal Mark Parameter that defines which decimal mark (point or...
  • Page 167 SV 977D User Manual Noise rating values for 1/1 octave sound measurements. Chapter 10.3.3 Noise criterion values octave sound Chapter measurements. 10.3.3 Spectrum Type Screen that enables selecting of types of spectra for Chapter displaying during vibration measurement: Acceleration, 10.3.4, Velocity or Displacement.

  • Page 168: Instrument Parameters

    SV 977D User Manual Dim screen on Screen dimming in no activity after certain delay. Is Chapter setting up in the Screen Setup screen. idle Screen off on idle Screen switching off in no activity after certain delay. Is Chapter setting up in the Screen Setup screen.
  • Page 169 SV 977D User Manual Multifunction I/O Screen that enables configuring the instrument's I/O port Chapter parameters: I/O Mode, Function, Slope, Polarisation, Active Level, Source, Source Type, Alarm Level, Send SMS and Send E-Mail. Detailed description of the I/O Appendix C port is given in Appendix C.
  • Page 170 SV 977D User Manual Alarm Pulse Functionality of the Digital Out I/O mode when digital Chapter signal is used as a source of alarm signal in case of certain circumstances occurred during measurements (i.e. the level of the input signal was higher than a user Appendix C selected trigger alarm setting).
  • Page 171 SV 977D User Manual Network Screen that enables selecting the wireless network Chapter option: Off or GPRS. 15.2.1 Screen that enables configuring the modem basic Chapter Modem settings: Internet Cfg, Data Protocol, Sim Auth Mode, 15.2.2 Send SMS, Send E-Mail, Auto Reconnection, Reconnection Delay, TCP IRT and TCP Max.
  • Page 172 SV 977D User Manual TCP IRT Parameter of the Modem screen defining TCP Initial Chapter Retransmission Timeout. 15.2.2 Parameter of the Modem screen defining maximum Chapter TCP Max. Ret. reconnection attempts performed within a simple 15.2.2 connection cycle. Modem Screen that enables configuring supporting options...
  • Page 173 SV 977D User Manual DNS Server Parameter of the Modem Connection screen defining the Chapter IP address of DNS server used for establishing 15.2.3 connection with the internet. In most cases, leaving the default value of “0.0.0.0” will be sufficient, but some SIM cards may require a specific address.
  • Page 174 SV 977D User Manual SvanMail Parameter of the E-mail Settings screen switching the Chapter option that allows sending e-mails without additional 15.2.5 parameters, simplifying the process of configuring alarm notifications. Parameter of the E-mail Settings screen defining SMTP Chapter SMTP Address server address used for sending e-mail messages.

  • Page 175: Auxiliary Parameters

    SV 977D User Manual SSL Encryption Parameter of the E-mail Settings screen switching on the Chapter option enabling attempt to configure the modem for 15.2.5 connecting to the mail server used the encryption protocol SSL. Parameter of the E-mail Settings screen switching on the...
  • Page 176 SV 977D User Manual Vibration Units Screen that enables selecting units for vibration Chapter measurements. Warnings Screen that enables activating warning messages, which Chapter are to be displayed during the normal operation of the instrument.

  • Page 177: Appendix A. Remote Control

    SV 977D User Manual - Appendixes APPENDIX A. REMOTE CONTROL The USB 2.0 interface is the Type C serial interface working with 480 MHz clock which enables one to control remotely the unit. Its speed is relatively high, and it ensures the common usage of USB-C in most produced nowadays Personal Computers.

  • Page 178: Function #2 - Read Out Of The Main Measurement Results

    SV 977D User Manual - Appendixes #1,Xccc,Xccc,(...),Xccc; Note: All bytes of that transmission are ASCII characters. #2 – R A.2. F UNCTION EAD OUT OF THE MAIN MEASUREMENT RESULTS A.2.1. Read-out the profile results #2 function enables one to read out the current measurement results from the selected profile.

  • Page 179: Read-Out The Rt60 Results

    SV 977D User Manual - Appendixes The codes of results in the case of Sound Meter mode are defined as follows: number of measurement cycle; overload flag (c equals to 0 or 1); time of the measurement cycle (c – value in seconds);...

  • Page 180: Read-Out The Stipa Results

    SV 977D User Manual - Appendixes In the case of RT60 function there are additional codes: #2,EDT; this function allows you to read the current EDT results. #2,T20; this function allows you to read the current RT20 results. #2,T30; this function allows you to read the current RT30 results.

  • Page 181: Function #3 - Read Out Of The Measurement Results In 1/X Octave Or Fft Mode

    SV 977D User Manual - Appendixes frn: LZQ,MF1,MF2,ERR enabled: 0/1 flags: UNDERRANGE = 1, OVERLOAD = 2 Note: All bytes of that transmission are ASCII characters. #3 – R A.3. F UNCTION EAD OUT OF THE MEASUREMENT RESULTS IN CTAVE OR MODE #3 function enables one to read out the current measurement results in 1/x OCTAVE or FFT mode.

  • Page 182: Function #7 - Special Control Functions

    SV 977D User Manual - Appendixes #7 – S A.4. F UNCTION PECIAL CONTROL FUNCTIONS #7 function enables the user to perform special control functions. Some of them should be used with the extreme care. #7 function format is defined as follows.
  • Page 183 SV 977D User Manual - Appendixes #D,d,<disk>,<address>; this function enables to change the working directory Response: #D,d; - command was executed #D,d,?; - command cannot be executed #D,r,<disk>,<address>,<offsetB>,<nB>;this function enables the user to read the file Response: #D,r,<disk>,<address>,<offsetB>,<nB>; [<data>] #D,s,?; this function returns the parameters of the setup directory in format: #D,s,<disk>,<address>;...

  • Page 184: Function #R - Automatic Results Transmission During The Measurement

    SV 977D User Manual - Appendixes #D,w; #R – A A.6. F UNCTION UTOMATIC RESULTS TRANSMISSION DURING THE MEASUREMENT #R remote command is used to configure the instrument to automatically send results during measurements. The command and response formats described below are available as part of the command.
  • Page 185 SV 977D User Manual - Appendixes Note: If the results separator and decimal separator characters are identical, the command will not be accepted, and the command error message will be returned - see point 4. Each identifier consists of a letter and possible numeric parameters separated by a colon. If the identifier is given without the required parameters, default values of missing parameters will be zero.
  • Page 186 SV 977D User Manual - Appendixes If the format order is correct, instrument will send full information about the mode settings in the answer - see point 3. If the format order is incorrect, the error message will be returned - see point 4.
  • Page 187 SV 977D User Manual - Appendixes If the mode of automatic sending of results is turned on, after every second of measurement the device will send data in accordance with the above format. Measurement parameters (such as date and time) will be sent in accordance with the format described in point 2.
  • Page 188 SV 977D User Manual - Appendixes – first profile Leq result in dB 71.29 – 20.0Hz spectrum band result in dB, 60.67 – 25.0Hz spectrum band result in dB, 63.57 (...) – 16.0kHz spectrum band result in dB, 51.75 – 20.0kHz spectrum band result in dB,.
  • Page 189 SV 977D User Manual - Appendixes Indexes of 1/1 octave bands Nominal Audio Full Ultra frequency band band band 1.00 Hz 2.00 Hz 4.00 Hz 8.00 Hz 16.0 Hz 31.5 Hz 63.0 Hz 125 Hz 250 Hz 500 Hz 1.00 kHz 2.00 kHz...
  • Page 190 SV 977D User Manual - Appendixes 2.00 Hz 2.50 Hz 3.15 Hz 4.00 Hz 5.00 Hz 6.30 Hz 8.00 Hz 10.0 Hz 12.5 Hz 16.0 Hz 20.0 Hz 25.0 Hz 31.5 Hz 40.0 Hz 50.0 Hz 63.0 Hz 80.0 Hz...

  • Page 191: Control Setting Codes

    SV 977D User Manual - Appendixes A.7. C ONTROL SETTING CODES The control setting codes used in the SVAN 977A instrument are given in the table below. Table A.1. Unit parameters Group name Code description code code code Unit type...
  • Page 192 SV 977D User Manual - Appendixes Table A.3. Measurement parameters Group name Code description code code code Delay in the start of nn delay given in seconds (0  60) measurement Sync. to full minute Sync. to the full 15 minutes Start Synchronization Sync.
  • Page 193 SV 977D User Manual - Appendixes Table A.4. Profile parameters Group name Code description code code code Z filter for profile n Filter type in profile n A filter for profile n in SLM mode C filter for profile n...
  • Page 194 SV 977D User Manual - Appendixes Table A.5. Logger parameters Group name Code description code code code Logger Summary Results Logger Meteo n = number in milliseconds (2, 5, 10, 20, 25, 50, 100, 200, 500, 1000) Logger step n = number in seconds (1  60) n = number in minutes (1 ...
  • Page 195 SV 977D User Manual - Appendixes Group name Code description code code code – Linear Detector type in 1/x Octave – Fast analysis in SLM mode (for Audio band only) – Slow Storing the results of switched Off 1/x Octave analysis in logger with Leq spectrum logger’s file in SLM mode...
  • Page 196 SV 977D User Manual - Appendixes Table A.8. Measurement trigger parameters Group name Code description code code code switched off (Off) Slope + Slope – Triggering mode Level + Level – Grad + External Source of the triggering signal x = level in dB (24  136)
  • Page 197 SV 977D User Manual - Appendixes Group name Code description code code code 48kHz Audio Sampling 24kHz 12kHz Bits Per Sample signal gain level Signal Gain  (0  40) HP filter Z filter Filter in SLM mode A filter...
  • Page 198 SV 977D User Manual - Appendixes Table A.12. GPRS parameters Group name Code description code code code switched off GPRS Mode switched on switched off Internet Configure (GPRS) switched on switched off normal (Connection Request Packets) Registration Mode (GPRS) AS (Address Server registration) Smart AS (Address Server registration –...
  • Page 199 SV 977D User Manual - Appendixes Group name Code description code code code 0 - Off Send e-mail (GPRS) 1 - On xxxxx - xxxxx up to 32 characters (permitted E-mail SMTP Address characters: 0-9, a-z, '.') (GPRS) xxxxx - xxxxx up to 20 characters (permitted...
  • Page 200 SV 977D User Manual - Appendixes RPM parameters Table A.14. Group name Code description code code code switched Off RPM Measurement switched On RPM Pulse n = Pulses/Revolution (1 ÷ 360) RPM Unit Table A.15. Communication ports parameters Group name...
  • Page 201 SV 977D User Manual - Appendixes Group name Code description code code code – day, – hour, – minute, – seconds, – Latitude degree, – Latitude minutes, – Latitude seconds, LaS10 – Latitude fraction of seconds, – Latitude direction (N- north, S-...
  • Page 202 SV 977D User Manual - Appendixes Group name Code description code code code Positive Polarisation Negative Slope + Slope Slope - STIPA parameters Table A.20. Group name Code description code code code 18 - measurement list view 19 - frequency table...
  • Page 203 SV 977D User Manual - Appendixes Group name Code description code code code sum of the following flags: b0 - averaged 1/x Octave spectrum, b1 - maximum 1/x Octave spectrum, b2 - minimum 1/x Octave spectrum, Note: the command accepts values in hex format! E.g.
  • Page 204 SV 977D User Manual - Appendixes Group name Code description code code code type (read only) FAT16 FAT32 FAT12 #7,NS; This function returns the number of SD-card number of sectors (sector = 512 bytes) on the SD-card in the – number of sectors sectors (read only) format #7,NS,x;...
  • Page 205 SV 977D User Manual - Appendixes Group name Code description code code code the External Power functionality in the format: #7,EP,x,V ,y,V #7,EP,x,V ,y,V ; This function sets the parameters of the External Power functionality. where: – Power Off functionality disabled, x = 0 –...
  • Page 206 SV 977D User Manual - Appendixes Group name Code description code code code 00040 - Lpeak values in profile 2 00080 - Lmax values in profile 2 00100 - Lmin values in profile 2 00200 - Leq values in profile 2...

  • Page 207: Appendix B. Data File Structures (Revision 2.08)

    SV 977D User Manual - Appendixes APPENDIX B. DATA FILE STRUCTURES (revision 2.08) Each file consists of blocks of parameters followed by the logger data. The number and sequence of the blocks of parameters may vary depending on the type of measurement performed, however, the header block...
  • Page 208 SV 977D User Manual - Appendixes subtype of the instrument: – SVAN 977 3, 13 – BSWA 801, АЛГОРИТМ 05 4, 14 – СПРУТ-9 UnitSubtype – SVAN 977W – SVAN977A – SV 977D device type identifier: – SVAN 977, SVAN 977A,...
  • Page 209 SV 977D User Manual - Appendixes User’s text Table B.5. Word Name Comment number = block identifier 0nn03h 0nnh = block length in words comment text; ASCII character row (terminated by zero byte) TitleText Table B.6. Information about the instrument name...
  • Page 210 SV 977D User Manual - Appendixes Word Name Comment number number of measurement cycles (zero means infinity) - the parameter is important if the duration of the measurement cycle (IntTimeSec) is RepCycle finite; for infinite measuring cycle time this parameter is irrelevant...
  • Page 211 SV 977D User Manual - Appendixes Word Name Comment number rotation measurement mode: 0 – disabled RPM_On 1 – enabled. Number of pulses per rotation RPM_Pulse windscreen (only for sound measurement mode): 0 – measurement without windscreen Widscreen 1 – measurement with windscreen compensation filter (only for sound measurement mode): 1 –...
  • Page 212 SV 977D User Manual - Appendixes Measurement trigger parameters Table B.8. Word Name Comment number = block identifier, 0nn2Bh 0nnh = block length in words. trigger mode: 0 – measurement without triggering 1 – positive slope (Slope +) 2 – negative slope (Slope –) TriggerMode 3 –...
  • Page 213 SV 977D User Manual - Appendixes Reserved block Table B.10. Word Name Comment number = block identifier 0nn31h 0nnh = block length in words … reserved Waveform signal registration (wave recording) Table B.11. Word Name Comment number 2Dh = block identifier...
  • Page 214 SV 977D User Manual - Appendixes Word Name Comment number measurement filter for the recorded signal: 0 – HP 1 – Z 2 – A RecFilter 3 – C 5 – B 7 – U 8 – AU number of bits per sample...
  • Page 215 SV 977D User Manual - Appendixes Word Name Comment number polarity of external triggering pulse (parameter relevant only to instantaneous triggering pulse function): 0 – positive polarity 1 – negative polarity Polarisation/Slope active slope of external triggering pulse (essential for out-of-range performance): 0 –...
  • Page 216 SV 977D User Manual - Appendixes Word Name Comment number 3 – HP10 4 – Vel1 5 – Vel3 6 – Vel10 7 – VelMF 8 – Dil1 9 – Dil3 10 – Dil10 21 – Wh measurement filter in sound measurement mode: 0 –...
  • Page 217 SV 977D User Manual - Appendixes Word Name Comment number number of markers MarkerCount 3..7 MarkerName[1] name of the first marker (10 ASCII symbols) reserved type of the first marker: 0 – block marker MarkerType[1] 1 – point marker parameters of further markers …...
  • Page 218 SV 977D User Manual - Appendixes Word Name Comment number octave division (type of filters): 1 – octave filters OctaveDivider 3 – 1/3 octave filters index of the first filter; the exact centre filter frequency in Hertz according to its index is given by the following formula: –...
  • Page 219 SV 977D User Manual - Appendixes Word Name Comment number = block identifier 0nn13h 0nnh = block length in words number of histograms (spectra bands and total results) number of statistical histogram classes NofClasses first class histogram level in 0.01 dB format BottomClass histogram classes width in 0.01 dB format...
  • Page 220 SV 977D User Manual - Appendixes Word Name Comment number spectrum measurement filter: 0 – HP 1 – Z 2 – A Filter 3 – C 5 – B 7 – U 8 – AU frequency of instantaneous spectra counting InstFreq …...
  • Page 221 SV 977D User Manual - Appendixes index of the first filter; the exact centre filter frequency in Hertz according to its index is given by the following formula: – for odd value b f = 1000 · G – for even value b (2i+1)/(2b) f = 1000 ·...

  • Page 222: Description Of Loggers Data Blocks

    SV 977D User Manual - Appendixes Word Name Comment number Source name 8+N+M.. SourceName[K] Source calibration factor in 0.01 dB format 8+N+M+K CalibrLevel … reserved Logger parameters Table B.26. Word Name Comment number = block identifier 0nn0Fh 0nnh = block length in words logger step in seconds logger step in milliseconds;...
  • Page 223 SV 977D User Manual - Appendixes 09xxxh – reserved block, 0Axxxh – pause marker block, 0Bxxxh – marker block of discontinuity of basic results records, 0Cxxxh – other marker blocks. In general, the rule is that in the first word of the block the bit b11 is deleted and in the last word the bit b11 is set, except for the user marker block (08xxxh), because the block consists of only one word.
  • Page 224 SV 977D User Manual - Appendixes Word Name Comment number results of the spectrum measurement: – results are available if the spectra recording during measurement is enabled (see the word "SpecLogg" in the measurement parameter [ResSpec[..]] block – see Table B.7)
  • Page 225 SV 977D User Manual - Appendixes Word Name Comment number 0B0h = ID of the first word of the block 0B0nnh 0nnh = first (the lowest) byte of the parameter 0B1h = ID of the second word of the block...
  • Page 226 SV 977D User Manual - Appendixes Table B.34. Block of marker for meteorological rainfall calculated with the logger step Word Name Comment number 0C705h = block start identifier 0C705h block length in words 0nnnnh rainfall intensity in 0.1 mm / h format (this is a rolling average for...
  • Page 227 SV 977D User Manual - Appendixes Word Name Comment number point event state bit mask: – each bit specifies the state of one event (the lowest bit defines the state of the first event, the next one – the second event, and so on), –...

  • Page 228: Description Of Cyclical Results Blocks (Summary Results)

    SV 977D User Manual - Appendixes B.3. D ESCRIPTION OF CYCLICAL RESULTS BLOCKS UMMARY ESULTS Table B.39. Block of counters Word Name Comment number = block identifier 0nn59h 0nnh = block length in words measurement cycle number 1..2 CycleNo …...
  • Page 229 SV 977D User Manual - Appendixes Word Name Comment number "RMS" value in 0.01 dB format for vibration measurement mode RMS/Leq "Leq" value in 0.01 dB format for sound measurement mode value reserved for vibration measurement mode Reserved/ Lden „Lden" value in 0.01 dB format for sound measurement mode...
  • Page 230 SV 977D User Manual - Appendixes "Meter Table" results (this block appears only inside the main result block – see Table B.42. Table B.40) Word Name Comment number 0Ch = block identifier 0nn0Ch 0nnh = block length in words value of the LCpeak result in the format 0.01 dB LCpeak value of the LCeq result in the format 0.01 dB...
  • Page 231 SV 977D User Manual - Appendixes Word Name Comment number – bit right shift operator >> – bit left shift operator << lower and higher word of the maximum value of the rpm measured during the measurement cycle; the value of the result is calculated 3..4...
  • Page 232 SV 977D User Manual - Appendixes Word Name Comment number value of the first result in the format 0,01 dB Result[1] value of the second result in the format 0,01 dB Result[2] value of the penultimate result in the format 0,01 dB Result[N+T–1]...
  • Page 233 SV 977D User Manual - Appendixes Table B.50. Results of GPS measurements Word Name Comment number 0xxh = block identifier: – GPS measurement results at the beginning of the measurement cycle 0nnxxh – GPS measurement results at the end of the measurement...
  • Page 234 SV 977D User Manual - Appendixes Word Name Comment number firmware version number of the monitoring stations; for example, 123 MStFirmwareVersion means version 1.23 meteorological results averaging time used in the monitoring station 5..6 MStIntTimeSec temperature measurement result in format 0,1°C...
  • Page 235 SV 977D User Manual - Appendixes Word Name Comment number m(f1) result value for the next frequency in the format 0.01 i*5+3 Mf1[i] m(f2) error flag for the next frequency (0,1) i*5+4 Err2[i] m(f2) result value for the next frequency in the format 0.01...
  • Page 236 SV 977D User Manual - Appendixes Word Name Comment number in the instantaneous results block: – reserved value N_RT20[1] in the averaged results block: – number of RT20 averaged results for the first frequency in the instantaneous results block: – reserved value...

  • Page 237: Date And Time (Example Decoding Procedure)

    SV 977D User Manual - Appendixes Word Name Comment number i*4+3 F1_index[i] left boundary of the critical bandwidth, line index i*4+4 F2_index[i] right boundary of the critical bandwidth, line index i*4+5 Lt[i] tone level in the format 0.01 dB i*4+6 Ls[i] averaged signal level of the tone in the format 0.01 dB...

  • Page 238: Appendix C. Technical Specifications

    Specification of SV 977D as SLM in the standard configuration Statement of performance SV 977D working as the SLM with all listed below accessories meets requirements of the IEC 61672:2013 for the Class 1 Group X instruments. Configuration of the complete SLM in its normal mode of operation SV 977D sound &...
  • Page 239 SV 977D User Manual - Appendixes Normal operating mode SV 977D in configuration with the SV 12L microphone preamplifier and MK 255 microphone with following settings: High or Low measurement range (path: <Menu> / Measurement / Range – see Chapter 4.6), switched on Microphone compensation, selected Free Field compensation and switched off Windscreen compensation (path: <Menu>...
  • Page 240 SV 977D User Manual - Appendixes Table C.1.1. Linear operating ranges for the Low measurement range (for the sinusoidal signal and microphone sensitivity 50 mV/Pa) AS/F BS/F CS/F ZS/F AeqT BeqT CeqT Cpeak = 2 s) [dB] from from from...
  • Page 241 (see Chapter C.1.2) SV 977D Diffuse Field compensation filter Note: Using special filters might change the frequency response and measuring ranges of SV 977D. Please check the below given specification. Linear operating ranges for LEQ measurements with the Diffuse Field filter The starting point at which tests of level linearity shall begin is 94.0 dB for the frequencies specifies below.
  • Page 242 SV 977D User Manual - Appendixes Table C.1.3. Linear operating ranges for the High measurement range with the Diffuse Field filter (for the sinusoidal signal and microphone sensitivity 50 mV/Pa) AS/F BS/F CS/F ZS/F AeqT BeqT CeqT Cpeak [dB] = 2 s)
  • Page 243 Note: When SV 977D is moved from a warm environment with high humidity to a colder environment, care should be taken not to produce condensation inside the instrument. In this case, much longer stabilization periods may be necessary.
  • Page 244 SV 977D User Manual - Appendixes Microphone prepolarised free-field ½” condenser microphone MK 255 Nominal sensitivity 50 mV/Pa (corresponding to -26 dB re 1 V/Pa) Capacitance 17 pF Reference point geometric centre of the microphone diaphragm. Note: Maximum sound pressure level that can be applied to a microphone without destroying it: 146 dB.
  • Page 245 SV 977D Free Field frequency response Typical Free Field frequency responses of SV 977D are presented on the below figure together with the effect of reflections and diffraction of the acoustic plane wave from the SV 977D case (“Case Effect”).
  • Page 246 SV 977D User Manual - Appendixes MK 255 typical Free SV 977D typical Free SV 977D Uncertainty Frequency Field response Field response Case Effect (IEC 62585:2012) [Hz] [dB] [dB] [dB] [dB] 0.00 -0.04 -0.04 0.25 0.02 -0.03 -0.05 0.25 0.02 0.03...
  • Page 247 SV 977D User Manual - Appendixes MK 255 typical Free SV 977D typical Free SV 977D Uncertainty Frequency Field response Field response Case Effect (IEC 62585:2012) [Hz] [dB] [dB] [dB] [dB] 1 223 -0.02 0.12 0.14 0.25 1 259 -0.06 0.18...
  • Page 248 SV 977D User Manual - Appendixes MK 255 typical Free SV 977D typical Free SV 977D Uncertainty Frequency Field response Field response Case Effect (IEC 62585:2012) [Hz] [dB] [dB] [dB] [dB] 5 158 -0.66 -0.03 0.62 0.35 5 309 -0.54 -0.12...
  • Page 249 SV 977D User Manual - Appendixes Table C.1.6. SV 977D combined Free Field correction with the use of the electrostatic actuator for 0 deg incidence angle (microphone corrections + Case Effect) Frequency [Hz] [dB] 31.5 Correction -0.05 0.0 -0.03 -0.07 -0.17...
  • Page 250 SV 977D User Manual - Appendixes The round charts show the directional characteristic and the charts below shows the errors for angles.
  • Page 251 SV 977D User Manual - Appendixes...
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  • Page 257 SV 977D User Manual - Appendixes Table C.1.7. Typical directional response of SV 977D Angle [ Frequency [Hz] 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 0.00 -0.01 -0.03 -0.05 -0.07 -0.10 -0.13 -0.15 -0.18 -0.20 0.02 0.02 0.01...
  • Page 258 SV 977D User Manual - Appendixes 10 000 -0.26 -0.63 -0.98 -1.24 -1.85 -2.50 -2.99 -3.75 -4.28 -5.52 10 600 -0.14 -0.42 -0.95 -1.44 -1.88 -2.66 -3.51 -3.82 -4.42 -5.10 11 200 -0.28 -0.38 -0.82 -1.08 -1.84 -2.51 -3.16 -4.23 -4.94...
  • Page 259 SV 977D User Manual - Appendixes 5 600 -2.56 -2.69 -2.99 -2.46 -2.72 -2.65 -2.06 -1.58 -1.73 -1.09 6 300 -3.19 -3.23 -3.72 -3.57 -3.62 -3.19 -3.08 -2.30 -1.79 -1.66 7 100 -3.70 -4.01 -4.06 -3.92 -3.26 -3.23 -2.58 -2.24 -1.86...

  • Page 260: Effect Of The Sa 22 Windscreen

    SV 977D User Manual - Appendixes C.1.2 Effect of the SA 22 windscreen Note: When using the SA22 windscreen the Windscreen compensation filter must be switched on to ensure good tolerances margin of the SV 977D frequency response. SA 22 Windscreen Effect...
  • Page 261 SV 977D User Manual - Appendixes SA 22 Free Field Compensation Compensated Uncertainty Frequency response filter SA 22 effect (IEC 62585:2012) [Hz] [dB] [dB] [dB] [dB] -0.05 -0.03 -0.08 0.20 -0.04 -0.04 -0.08 0.20 -0.03 -0.04 -0.07 0.20 -0.03 -0.04 -0.07...
  • Page 262 SV 977D User Manual - Appendixes SA 22 Free Field Compensation Compensated Uncertainty Frequency response filter SA 22 effect (IEC 62585:2012) [Hz] [dB] [dB] [dB] [dB] 1 884 0.45 -0.40 0.05 0.20 1 939 0.46 -0.40 0.06 0.20 1 995 0.47...
  • Page 263 SV 977D User Manual - Appendixes SA 22 Free Field Compensation Compensated Uncertainty Frequency response filter SA 22 effect (IEC 62585:2012) [Hz] [dB] [dB] [dB] [dB] 8 660 0.05 -0.03 0.02 0.30 8 913 0.02 -0.02 0.00 0.30 9 173 -0.04...
  • Page 264 SV 977D User Manual - Appendixes Directional characteristics of SV 977D with SA 22 Directional response of SV 977D with the MK 255 microphone, SV 12L preamplifier and SA 22 windscreen for specified frequencies. Combined typical directional characteristics The round charts show the typical directional characteristic and the charts below shows the errors for angles.
  • Page 265 SV 977D User Manual - Appendixes...
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  • Page 272 SV 977D User Manual - Appendixes Table C.1.9. Typical directional response of SV 977D with SA 22 Angle [ Frequency [Hz] 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 -0.01 -0.02 -0.03 -0.07 -0.10 -0.13 -0.19 -0.22 -0.28 -0.33...
  • Page 273 SV 977D User Manual - Appendixes 10 000 -0.10 -0.55 -0.75 -1.29 -1.89 -2.60 -3.41 -3.97 -4.91 -6.23 10 600 -0.25 -0.59 -0.89 -1.38 -1.99 -2.88 -3.85 -4.70 -5.71 -6.11 11 200 0.01 -0.30 -0.68 -1.21 -1.97 -2.56 -3.62 -4.32 -5.62...

  • Page 274: Effect Of The Sa 277D Outdoor Microphone Kit

    SV 977D User Manual - Appendixes 5 600 -2.74 -3.08 -3.34 -2.79 -3.13 -3.13 -2.51 -2.01 -2.13 -1.32 6 300 -2.74 -3.57 -3.67 -3.38 -3.89 -3.31 -3.18 -2.57 -1.78 -1.36 7 100 -3.81 -4.04 -4.31 -4.27 -3.85 -3.48 -3.01 -2.88 -2.32...

  • Page 275: Effect Of Vibration

    Table C.1.13. Test conditions: SV 977D with microphone and preamplifier is mounted on the shaker. Ref 1. Vibration is applied in a direction perpendicular to the plane of the microphone diaphragm.

  • Page 276: Specification Of Sv 977D As Vibration Level Meter (Vlm)

    & vibration level meter and analyser SV 80 10 mV/ms , IEPE accelerometer (see C.6 for details) SC 27 coiled cable for accelerometer 2 m Accessories included in the SV 977D instrument set SC 158 USB-C cable Accessories available SP 75 RS 232 interface...
  • Page 277 SV 977D User Manual - Appendixes • Linear measurement with the Wh filter: from 2.02 mms to 338.8 ms (the sinusoidal signal RMS) from 2.86 ms to 479.2 ms (PEAK) Linear operating ranges with the Wh filter Table C.2.1. Linear operating ranges (RMS) With the SV 80 (10 mV/ms ) accelerometer sensitivity @ 79.58 Hz...
  • Page 278 SV 977D User Manual - Appendixes • Linear measurement with the Vel10 and MFVel filters: from 0.145 mms to 5.13 ms (the sinusoidal signal RMS) from 0.205 mms to 7.25 ms (PEAK) Linear operating ranges with the Vel10 filter Table C.2.5.
  • Page 279 IEPE type, 28 V / 1.5 mA current source Maximum input voltage SV 977D is the instrument with the II security class according to the international standard IEC 348. The input voltage should be within the 28 V Peak – Peak RMS detector (Linear averaging) •...
  • Page 280 SV 977D User Manual - Appendixes Underrange detector The instrument has the built-in under-range detector. The “underrange” indication appears when the RMS value is below the lower linear operating range. 24 bits resolution. Analogue/Digital conversion Antialiasing filter Built-in antialiasing filter (eighth-order elliptic type) ensuring correct sampling of the measured signal.
  • Page 281 SV 977D User Manual - Appendixes • Dil3 from 0.2 Hz to 510 Hz • Dil10 from 1 Hz to 2050 Hz Special filter Filter for the evaluation of the machinery condition: • VelMF from 0.2 Hz to 4100 Hz; conforms with ISO 10816 (see Chapter C.5 for the frequency response...
  • Page 282 Statement of performance SV 977D can operate as 1/1 octave or 1/3 octave analyser with all listed below accessories meeting requirements of the IEC 61260-1:2014 standard for the pass band filters for the Class 1 Group X instruments.
  • Page 283 SV 977D User Manual - Appendixes Digital filters Weighting filters • according to IEC 61672-1:2013 for Class 1, • according to IEC 651 and IEC 61672-1:2013 for Class 1, • according to IEC 651 and IEC 61672-1:2013 for Class 1, •...
  • Page 284 SV 977D User Manual - Appendixes Table C.3.2. Peak for the sinusoidal signal 1 kHz, at reference conditions with the SV 12L preamplifier, and ST 02 adapter Peak for the sinusoidal signal 1 kHz, at reference conditions @ 1 kHz (0.0 dB calibration factor)
  • Page 285 SV 977D User Manual - Appendixes Reference conditions as per IEC 61260-1:2014 • Reference temperature +23°C • Reference relative humidity • Static pressure 101.325 kPa Calibration (electrical) Calibration level 0.5 V (114 dB re 1 µV) <  0.2 dB (for the temperature T=+23°C  5°C for sinusoidal...
  • Page 286 1/1 and 1/3 octave filters noise levels Typical electrical noise levels Z and A weighted for SV 977D in configuration with the SV 12L microphone preamplifier, ST 02 adapter and 50 Ohm BNC terminal for 1/1 octave filters. Averaging time 30 s.
  • Page 287 15.0 16 000 24.3 11.4 Typical electrical noise levels Z and A weighted for SV 977D in configuration with the SV 12L microphone preamplifier, ST 02 adapter and 50 Ohm BNC terminal for 1/3 octave filters. Averaging time 30 s.
  • Page 288 SV 977D User Manual - Appendixes Table C.3.4. Typical electrical noise levels Z and A weighted for SV 977D in configuration with the SV 12L microphone preamplifier, ST 02 adapter and 50 Ohm BNC terminal for 1/3 octave filters. 1/3 octave central...
  • Page 289 (resistance 5.1 kOmh) Normal operating mode SV 977D in configuration with the ST 08 adapter with following settings: High or Low measurement range (path: <Menu> / Measurement / Range – see Chapter 4.6), 1,5 mA IEPE current (path: <Menu> / Instrument / IEPE Current –...
  • Page 290 SV 977D User Manual - Appendixes Table C.3.5. Linear operating ranges with the Wh filter Linear operating ranges (RMS) With the SV 80 (10 mV/ms ) accelerometer sensitivity @ 79.58 Hz Range (RMS) Measured at the ref. environmental conditions, at 12.5 Hz sine signal from 20.2 µV (66.1 dB)
  • Page 291 SV 977D User Manual - Appendixes Note: When another vibration transducer is used, the frequency range given above for the HP filter can be different. Maximum peak voltage 30 V Peak-Peak (Maximum peak voltage of input sinusoidal signal, which can be applied to the VLM without destruction the...
  • Page 292 Attenuation in the stop band > 80 dB 1/1 and 1/3 octave filters noise levels Typical electrical noise levels HP/HPE-weighted for SV 977D in configuration with ST 08 adapter and 50 Ohm BNC terminal for 1/1 octave filters. Averaging time 30 s. Table C.3.8.
  • Page 293 23.8 31 500 34.1 Typical electrical noise levels HP/HPE-weighted for SV 977D in configuration with ST 08 adapter and 50 Ohm BNC terminal for 1/3 octave filters. Averaging time 30 s. Table C.3.9. Typical electrical noise levels HP/HPE-weighted for SV 977D in configuration with ST 08...
  • Page 294 SV 977D User Manual - Appendixes 1/3 octave central Low range High range frequency [Hz] [µV] [µV] 3.15 12.5 31.5 1 000 1 250 1 600 2 000 2 500 3 150 4 000 5 000 6 300 8 000 10 000 10.9...
  • Page 295 SV 977D User Manual - Appendixes 31.5 kHz 1/1 octave filter 16.0 kHz 1/1 octave filter (Ultra band) 16.0 kHz 1/1 octave filter (Audio/Full band)
  • Page 296 SV 977D User Manual - Appendixes 8.0 kHz 1/1 octave filter 4.0 kHz 1/1 octave filter 2.0 kHz 1/1 octave filter...
  • Page 297 SV 977D User Manual - Appendixes 1.0 kHz 1/1 octave filter 500 Hz 1/1 octave filter 250 Hz 1/1 octave filter...
  • Page 298 SV 977D User Manual - Appendixes 125 Hz 1/1 octave filter 63.0 Hz 1/1 octave filter 31.5 Hz 1/1 octave filter...
  • Page 299 SV 977D User Manual - Appendixes 16.0 Hz 1/1 octave filter 8.00 Hz 1/1 octave filter 4.00 Hz 1/1 octave filter...
  • Page 300 SV 977D User Manual - Appendixes 2.00 Hz 1/1 octave filter 1.00 Hz 1/1 octave filter Summary curve of the Ultra Band...
  • Page 301 SV 977D User Manual - Appendixes Summary curve of the Audio/Full Band 1/3 octave filters 48 filters with centre frequencies from 0.8 Hz to 40 kHz (base 10), meeting IEC 61260-1:2014 standard for Class 1 1/3 octave filters for 31.5 kHz 1/1 octave filter...
  • Page 302 SV 977D User Manual - Appendixes 1/3 octave filters for 16.0 kHz 1/1 octave filter (Audio/Full band) 1/3 octave filters for 8.0 kHz 1/1 octave filter 1/3 octave filters for 4.0 kHz 1/1 octave filter...
  • Page 303 SV 977D User Manual - Appendixes 1/3 octave filters for 2.0 kHz 1/1 octave filter 1/3 octave filters for 1.00 kHz 1/1 octave filter 1/3 octave filters for 500 Hz 1/1 octave filter...
  • Page 304 SV 977D User Manual - Appendixes 1/3 octave filters for 250 Hz 1/1 octave filter 1/3 octave filters for 125 Hz 1/1 octave filter 1/3 octave filters for 63.0 Hz 1/1 octave filter...
  • Page 305 SV 977D User Manual - Appendixes 1/3 octave filters for 31.5 Hz 1/1 octave filter 1/3 octave filters for 16.0 Hz 1/1 octave filter 1/3 octave filters for 8.00 Hz 1/1 octave filter...
  • Page 306 SV 977D User Manual - Appendixes 1/3 octave filters for 4.00 Hz 1/1 octave filter 1/3 octave filters for 2.00 Hz 1/1 octave filter 1/3 octave filters for 1.00 Hz 1/1 octave filter...
  • Page 307 SV 977D User Manual - Appendixes Summary curve of the Ultra Band Summary curve of the Audio/Full Band Table C.3.10. 1/1 and 1/3 octave filters RT60 decay time Nominal 1/3 octave filters 1/3 octave filters Frequency [Hz] RT60 [ms] RT60 [ms]...
  • Page 308 SV 977D User Manual - Appendixes 1 250 1 600 2 000 < 10 2 500 3 150 4 000 < 10 5 000 6 300 < 10 8 000 < 10 < 10 10 000 < 10 12 500 <...
  • Page 309 SV 977D User Manual - Appendixes C.4. F REQUENCY CHARACTERISTICS OF THE IMPLEMENTED BROADBAND DIGITAL FILTERS “A” filter Class 1 according to IEC 651 and IEC 61672-1:2013 “A” filter characteristics “C” filter Class 1 according to IEC 651 and IEC 61672-1:2013 “C”...
  • Page 310 SV 977D User Manual - Appendixes “Z” filter Class 1 according to IEC 61672-1:2013 “Z” filter characteristics “D” filter according to BS 5721:1979 “D” filter characteristics “U” filter Class 1 according to IEC 61012:1990 “U” filter characteristics...
  • Page 311 SV 977D User Manual - Appendixes “AU” filter Class 1 according to IEC 61012:1990 “AU” filter characteristics “LF” filter according to EPA-93-F105-02-104 Low Frequency Noise Control Regulations “LF” filter characteristic “HP1” filter is used for the acceleration measurements (the vibration signal) in the frequency range from 1 Hz to 20 kHz.
  • Page 312 SV 977D User Manual - Appendixes “HP3” filter is used for the acceleration measurements (the vibration signal) in the frequency range from 3.5 Hz to 20 kHz ”HP3” filter characteristics “HP10” filter is used for the acceleration measurements (the vibration signal) in the frequency range from 10 Hz to 20 kHz “HP10”...
  • Page 313 SV 977D User Manual - Appendixes “Vel3” filter is used for the velocity measurements in the frequency range from 1 Hz to 20 kHz “Vel3” filter characteristics “Vel10” filter is used for the velocity measurements in the frequency range from 1 Hz to 20 kHz “Vel10”...
  • Page 314 SV 977D User Manual - Appendixes “Dil1” filter is used for the displacement measurements in the frequency range [1 Hz to 20 kHz]. “Dil1” filter characteristics “Dil3” filter is used for the displacement measurements in the frequency range [1 Hz to 20 kHz] “Dil3”...
  • Page 315 SV 977D User Manual - Appendixes “Wh” filter is used for the assessment of the influence of the vibration on the human body. It conforms with ISO 5349 and ISO 8041-1:2017 “Wh” filter characteristics “HP” filter is a high-pass filter “HP”...
  • Page 316 Typical Micro SD or Micro SDHC cards can be used. Supported for up to 128 GB (if card was formatted as FAT32). Note: The originally supplied Kingston Industrial memory card has been tested by SVANTEK and cards of this type are strongly recommended for use when the original card is going to be replaced.
  • Page 317 + 7 V  16 V Interface USB Type C The SV 977D USB-C 2.0 interface enables remote control of the instrument and data transfer with the speed up to that attainable with 480 MHz clock. Note: For effective operation with the USB, the High 480Mbps speed mode should be used, however when the interference RF field strength may exceed the value of 3V/m, then it is recommended to switch to the Full 12Mbps speed mode.
  • Page 318 RS 232 interface (optional) The RS 232 interface option for SV 977D is provided by means of the SP 75 interface. It conforms to the EIA Standard RS 232C. It enables the user to programme remotely all instrument functions and the transmissions to and from the meter with the speed from 300 bit/s to 115200 bit/s.
  • Page 319 SV 977D User Manual - Appendixes Table C.5.5. SP 75 interface description PC RS 232, SP 75 connector 9 - pin connector (DB 09 F) Signal name Pin number 1 – LSD 1 (not connected) 2 – RXD 3 – TXD 4 –...
  • Page 320 SV 977D User Manual - Appendixes 2. I/O Mode: Analog In – future feature. 3. I/O Mode: Digital In. When the Ext. Trigger function is activated, the external triggering of the instrument may be provided. To do that the user should select Trigger: External (path: <Menu>...
  • Page 321 <1µs (directly depends on position deviation) “The Bluetooth ® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by SVANTEK is under license. Other trademarks and trade names are those of their respective owners.
  • Page 322 SV 977D User Manual - Appendixes Weight 600 g (with batteries). 343 x 79 x 39 mm (with microphone and preamplifier). Dimensions Environmental parameters • Working temperature range -10C  +50C • Storing temperature range -20C  +50C (-30C  +60C without batteries) •...
  • Page 323 SV 977D User Manual - Appendixes C.6. S SV 80 PECIFICATION OF ACCELEROMETER Performance Number of axis ...................1 Sensitivity (± 5 %) ................10 mV/(ms ) ~ 100 mV/g Measurement range ................0.01 ms RMS ÷ 500 ms Peak Frequency response (by design guideline, ± 3 dB) ......0.5 Hz ÷ 14 000 Hz Linearity ....................±...
  • Page 324 0 deg means direction orthogonal to the membrane surface. 90 deg means direction parallel to the membrane surface. Frequency response of SV 977D with the SA 277D outdoor microphone kit is compensated by means of two digital filters which can be set in the Compensation screen (path: <Menu>...
  • Page 325 Outdoor Environment or Outdoor Airport compensation must be switched on (path: <Menu> / Measurement / Compensation). Statement of performance SV 977D working as the SLM with SA 277D meets requirements of IEC 61672:2013 for the Class 1 Group X instruments. Linear operating ranges with the Outdoor Environment filter The starting point at which tests of level linearity shall begin is 94.0 dB for the frequencies specifies below.
  • Page 326 SV 977D User Manual - Appendixes MK 255 Free Field frequency response for 90 deg incidence angle Table C.7.4. MK 255 typical Free Field frequency response for 90 deg incidence angle MK 255 typical MK 255 typical MK 255 typical...
  • Page 327 SV 977D User Manual - Appendixes MK 255 typical MK 255 typical MK 255 typical Free Field Frequency Free Field Frequency Free Field Frequency response response response [Hz] [dB] [Hz] [dB] [Hz] [dB] 2 175 -0.39 9 441 -3.54 -0.10 2 239 -0.40...
  • Page 328 SV 977D User Manual - Appendixes Free Field frequency response of SV 977D with SA 277D for 90 deg incidence angle...
  • Page 329 SV 977D User Manual - Appendixes Table C.7.6. Typical Free Field frequency characteristics of SV 977D with SA 277D for 90 deg incidence angle Typical compensated Compensation filter Compensated Case response of SV 977D Uncertainty for 90 deg incidence Effect of SA 277D for...
  • Page 330 SV 977D User Manual - Appendixes Typical compensated Compensation filter Compensated Case response of SV 977D Uncertainty for 90 deg incidence Effect of SA 277D for Frequency with SA 277D for angle “Outdoor 90 deg incidence (IEC 62585:2012) 90 deg incidence Environment”...
  • Page 331 SV 977D User Manual - Appendixes Typical compensated Compensation filter Compensated Case response of SV 977D Uncertainty for 90 deg incidence Effect of SA 277D for Frequency with SA 277D for angle “Outdoor 90 deg incidence (IEC 62585:2012) 90 deg incidence Environment”...
  • Page 332 19 953 0.35 -14.78 -28.15 -21.05 Table C.7.7. SV 977D with SA 277D combined Free Field correction with the use of the electrostatic actuator for 90 deg incidence angle (microphone corrections + compensated Case Effect) Frequency [Hz] [dB] 31.5 Correction 0.0 -0.03 -0.10 -0.13 -0.11 -0.10...
  • Page 333 SV 977D User Manual - Appendixes The starting point at which tests of level linearity shall begin is 94.0 dB for the frequencies specifies below. For the Low measurement range and A weighting linearity test at 31.5 Hz, the starting point is 74 dB.
  • Page 334 SV 977D User Manual - Appendixes Free Field Frequency response of SV 977D with SA 277D for 0 deg incidence angle...
  • Page 335 SV 977D User Manual - Appendixes Table C.7.11. Typical Free Field frequency characteristics of SV 977D with SA 277D for 0 deg incidence angle Compensation filter Typical compensated Compensated Case Uncertainty for 0 deg incidence response of SV 977D Effect of SA 277D for Frequency angle “Outdoor...
  • Page 336 SV 977D User Manual - Appendixes Compensation filter Typical compensated Compensated Case Uncertainty for 0 deg incidence response of SV 977D Effect of SA 277D for Frequency angle “Outdoor with SA 277D for 0 deg 0 deg incidence (IEC 62585:2012) Airport”...
  • Page 337 SV 977D User Manual - Appendixes Compensation filter Typical compensated Compensated Case Uncertainty for 0 deg incidence response of SV 977D Effect of SA 277D for Frequency angle “Outdoor with SA 277D for 0 deg 0 deg incidence (IEC 62585:2012) Airport”...
  • Page 338 0.35 19 953 -22.89 -30.55 -30.34 Table C.7.12. SV 977D with SA 277D combined Free Field corrections with the use of the electrostatic actuator for 0 deg incidence angle (microphone corrections + compensated Case Effect) Frequency [Hz] [dB] 31.5 Correction 0.0 -0.16 -0.08 -0.04 -0.08 -0.17...
  • Page 339 SV 977D User Manual - Appendixes Free Field Directional characteristics of SV 977D with SA 277D Directional response of SV 977D with the MK 255 microphone, SV 12L preamplifier and SA 277D outdoor microphone kit for specified frequencies. Combined typical directional characteristics (0 deg and 90 deg incidence angle ref. 0 deg) The round charts show the typical directional characteristics (0 deg and 90 deg incidence angle ref.
  • Page 340 SV 977D User Manual - Appendixes...
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  • Page 347 SV 977D User Manual - Appendixes Table C.7.1. Typical directional response of SV 977D with SA 277D (0 deg and 90 deg incidence angle ref. 0 deg) Angle [ Frequency [Hz] 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 -0.02...
  • Page 348 SV 977D User Manual - Appendixes 8 500 -0.33 -1.07 -1.98 -2.30 -2.69 -2.38 -2.53 -3.03 -2.89 -2.62 9 000 -0.76 -1.79 -2.54 -2.87 -3.18 -3.24 -3.14 -3.07 -2.93 -2.66 9 500 -0.41 -1.37 -2.80 -3.04 -3.49 -3.65 -3.65 -3.55 -3.56...
  • Page 349 SV 977D User Manual - Appendixes 4 000 0.83 0.76 0.64 0.38 -0.35 -0.49 -0.79 -1.03 -1.13 -1.25 4 500 0.43 0.43 -0.29 -0.83 -1.01 -1.44 -1.55 -1.77 -1.81 -1.76 5 000 -0.40 -0.85 -1.24 -1.79 -1.83 -1.44 -1.67 -1.88 -1.94...
  • Page 350 SV 977D User Manual - Appendixes C.8. EU D ECLARATION OF ONFORMITY Manufacturer: SVANTEK Sp. z o. o Strzyglowska 81 Address: 04-872 Warszawa Poland SOUND LEVEL METER – ANALYZER Kind of product: VIBRATION LEVEL METER – ANALYZER Type: SV 977D...
  • Page 351 SV 977D User Manual - Appendixes APPENDIX D. DEFINITIONS AND FORMULAE OF MEASURED VALUES D.1. OUND EVEL ETER D.1.1 Basic terms and definitions (SLM mode) current time period of the measurement in seconds. last second of the measurement. exposure time in seconds (time period during which a person is exposed to the action of noise).
  • Page 352 SV 977D User Manual - Appendixes D.1.2 Definitions and formulas of SLM results The instrument calculates the sound measurement results for three profiles. The calculation flow diagram for one profile is presented below: max, min, Spl, tm3, τ = Slow wτ...
  • Page 353 SV 977D User Manual - Appendixes ��  �� (  �� ( �� ) �� ⁄ ����(����) = ���� ������   ( ∫ ����  �� ���� �� LRxx(s) Rolling Leq measured in the time window ��−���� for the last xx minutes/seconds of the measurement (Tw) moving with 1 second step.
  • Page 354 SV 977D User Manual - Appendixes ≠ 0, Leve Leve is calculated for: T = 0, T = 0. Lnight Lnight is calculated for: T = 0, T = 0, ≠ 0. ≠ 0, T ≠ 0, Lde is calculated for: T = 0.
  • Page 355 SV 977D User Manual - Appendixes D.2. IBRATION EVEL ETER D.2.1 Basic terms and definitions (VLM mode) current time period of the measurement in seconds.  exponential time constant in seconds for the given time-weighting. The following time constants are available: 100 ms, 125 ms, 200 ms, 500 ms, 1.0 s, 2.0 s, 5.0 s, 10.0 s.
  • Page 356  practice, value is strictly determined for the measuring instrument. For SV 977D, there are 240 classes and the width of each class is 0.5 dB. The histogram is the set of the class density values calculated for all classes.
  • Page 357 SV 977D User Manual - Appendixes Example: Let us assume that L35 is equal to 76.8 dB. It means that during the measurements the noise level 76.8 dB was exceeded in not more than 35% of the observation period. The cumulative density function for the exemplary data is presented in Figure on the right side.
  • Page 358 SV 977D User Manual - Appendixes APPENDIX E. REVERBERATION TIME CALCULATIONS E.1. I NTRODUCTION If an impulsive sound is generated in a room with reflecting boundaries, repeated reflections at the boundaries result in the rapid establishment of a more or less uniform sound field. This field then decays as the sound energy is absorbed by the bounding materials.
  • Page 359 SV 977D User Manual - Appendixes 60 dB. The 60 dB dynamic condition is impractical in real measurements (very difficult to fulfil) hence the reverberation time (RT 60) is obtained using the slope coefficient of the decay curve. The type of the...
  • Page 360 SV 977D User Manual - Appendixes ➢ RT 20 (reverberation time calculated with 20 dB dynamics): The RT 20 decay curve region is pointed out by markers t and t (cf. Fig. 3). It is checked whether the selected decay curve region has proper dynamics for the RT 20 calculation: –...
  • Page 361 SV 977D User Manual - Appendixes linear approximation 5 dB [dB] 30 dB noise margin t [s] Fig 4. The RT 30 evaluation E.3. D ESCRIPTION OF DECAY CURVE RECORDING IN DIFFERENT MEASUREMENT METHODS ➢ DECAY method This RT 60 measurement method requires omnidirectional sound source which emits pink noise in appropriate frequency band.
  • Page 362 SV 977D User Manual - Appendixes The measurement time in this method consists of: • The time between markers t and t in which the omnidirectional sound source emits acoustic power and the SVAN xxx analyser measures the actual sound pressure level.
  • Page 363 SV 977D User Manual - Appendixes This RT 60 measurement method requires impulse sound source like pistol, petard or other sound source which emits impulse signal with very high sound pressure level. The graphical illustration of data registering in this method is presented in Figure 7.
  • Page 364 The constant line spacing Δf is equal to 3,125 Hz (the standard requires the line spacing is withing 1,9 – 4 Hz). The investigation range in Svantek instruments is equal to [50;4575] Hz. The spectrum is measured for the range of [0;5000] Hz.
  • Page 365 SV 977D User Manual - Appendixes F.2.3. Determination of prominent tones Bandwidth and centre frequency of critical bands The widths Δf of the critical band about the tone frequency f is given in equation (C.1): The corner frequencies can be delivered as given in equations (C.2) and (C.3), since the central frequency of...
  • Page 366 SV 977D User Manual - Appendixes Tone level of a tone in a critical band, L The mean narrow-band level is derived in an iterative procedure from the lines of the critical band about the line under investigation. Neighbouring spectral lines should be used for summation purposes if - they differ from the narrow-band level...
  • Page 367 SV 977D User Manual - Appendixes Critical band level of the masking noise, L , masking index, a The critical band level, L , of the masking noise is given by equation (C.9): where LS is the mean narrow-band level;...
  • Page 368 SV 977D User Manual - Appendixes Uncertainty of the audibility ΔL , σ Using the Gaussian uncertainty propagation principle, the uncertainty of the audibility could be found as: where index i corresponds to the spectral lines around a tone, and index j corresponds to the next tone under investigation.
  • Page 369 SV 977D User Manual - Appendixes NOTE 2 To ensure the above-mentioned uncertainty, ±1.5 dB, it is necessary to have a minimum number of spectra with an averaging time of approximately 3 s. The number of spectra necessary to achieve the above- mentioned uncertainty will depend on the variability of the noises.
  • Page 370 SV 977D User Manual - Appendixes d) A diagrammatic representation of the narrow-band levels across the frequency of the 3-second averaged spectrum with the greatest ΔL. e) Tones in other critical bands that may cause an adjustment should be mentioned by their frequencies.
  • Page 371 SV 977D User Manual - Appendixes EXAMPLE 4: Tones found: 14. 921Hz – 1.08kHz; • Critical band: • Tone level, L 84.6 dB; • Noise level, L 28.4 dB; • Audibility, L: 59.1 dB • Tonal adjustment, Kt: 6.0 dB;...
  • Page 372 SV 977D User Manual - Appendixes APPENDIX G. SA 277D OUTDOOR MICROPHONE KIT ASSEMBLY GUIDE G.1. P SA 277D kit: Tools: 1 - tube K - 3mm Allen key 2 - dummy microphone 3 - O-ring type gasket Spare parts: 4 - clamp (2 halves) O1 - O-ring type gasket Ø35x1...
  • Page 373 SV 977D User Manual - Appendixes O-ring gasket locations inside...
  • Page 374 SV 977D User Manual - Appendixes G.2. A SA 277D SSEMBLY OF 1. Secure preamplifier (A) with the dummy microphone (2) and connect the cable (C). 2. Pull tube (1) over the cable.
  • Page 375 SV 977D User Manual - Appendixes 3. Connect the clamp halves (4) to the connector and insert O-ring gasket (3) on the lightning signed place. 4. Apply the upper, conical part (5) on the preamplifier. Note: Do not use preamplifier without the dummy microphone. It can cause damage of the...
  • Page 376 SV 977D User Manual - Appendixes 5. Screw the tube on the cone by rotating the tube – so as to not twist the cable. 6. Replace the dummy microphone (2) with the ½” microphone cartridge (B).
  • Page 377 SV 977D User Manual - Appendixes 7. Calibrate the complete system using SVANTEK acoustic calibrator. 8. Install the microphone protection tube (6). Use the Allen key (K) as a pin at protecting tube orifice.
  • Page 378 SV 977D User Manual - Appendixes 9. Mount windscreen (8) and the anti-bird spikes (7). 10. Slide the desiccator (9) inside the tube.
  • Page 379 SV 977D User Manual - Appendixes 11. Place the cable in the slot and connect the bottom part (12) by three screws (10) with washers (11). Use the Allen key (K). 12. Mount the completed system on the dedicated tripod or pole. Use ¼” thread adapter (13) (if...
  • Page 380 SV 977D User Manual - Appendixes G.3. I MPORTANT NOTES Note: The SA 209 (8) at the part set picture) foam windscreen protects microphone from wind and rain. If the SA 209 windscreen is used continuously for a long period of time it is recommended to replace it at least once a year.

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