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Svantek SVAN 977W User manual

Manual is about: SOUND & VIBRATION ANALYSER

Summary of SVAN 977W

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    User manual svan 977w sound & vibration analyser warsaw, february 2017 copyright © 2017 svantek. All rights reserved..

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    2 svantek 977w user manual note: on account of continuous product improvement svantek reserves the right to make changes to product specifications without notice. To download the most up to date user's manual please visit our web site at www.Svantek.Com . This user’s manual presents the firmware rev...

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    3 svantek 977w user manual contents 1. Introduction 7 1.1. Svan 977w as sound level meter & analyser 8 1.2. Svan 977w as vibration level meter & analyser 8 1.3. General features of svan 977w 8 1.4. Accessories included 8 1.5. Accessories available 9 1.6. Software options available 9 2. Manual contro...

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    4 svantek 977w user manual 5.4.5 setting the event recording – event recording 43 5.4.6 setting the markers – marker setup 45 5.4.7 setting the wave recording – wave recording 46 5.5 setting the 1/1 octave and 1/3 octave spectra – spectrum 48 5.6 selection of the microphone compensation filters – co...

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    5 svantek 977w user manual 8.9.4. Configuration of sms service - sms option 76 8.9.5. Configuration of e-mail service - e-mail settings 76 8.10. Checking of the instrument specification - unit label 77 9. Setting the auxiliary parametrs – auxiliary setup 78 9.1. Setting language of the user interfac...

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    6 svantek 977w user manual 11.3.4. Selection of the spectrum type in vibration mode - spectrum type 98 12. Fft analyser 99 12.1. Selection of the fft function 99 12.2. Setting the fft analyser 99 12.2.1. Setting the measurement range for fft - range 100 12.2.2. Setting the parameters of fft analysis...

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    7 svantek 977w user manual 1. Introduction the svan 977w is an all-digital, class 1 sound & vibration level meter (slm and vlm) as well as a real time 1/1 or 1/3 octaveanalyser. The instrument is designed for general acoustic and vibration measurements, environmental monitoring, occupational health ...

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    8 svantek 977w user manual 1.1. Svan 977w as sound level meter & analyser  noise measurements (spl, lmax, lmin, lpeak, leq, sel, lden, lepd, ltm3, ltm5 and 10 x ln% statistics) in accordance with type 1 iec 61672-1:2013 accuracy in the frequency range 20 hz to 20 khz with the sv 7052 microphone (3....

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    9 svantek 977w user manual 1.5. Accessories available  sa 277 outdoor protection unit  sa 17a external battery pack using 6 x aa batteries  sa 143 carrying case for svan 95x and accessories (lightweight)  sa 79 carrying case for svan 9xx and accessories (waterproof)  sa 47 carrying bag for svan...

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    10 svantek 977w user manual 2. Manual control of the instrument control of the instrument has been developed in a fully interactive manner. The user can operate the instrument by selecting the appropriate position from the selected menu list. Thanks to that, the number of push-buttons for control of...

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    11 svantek 977w user manual note: changing the push-button mode is performed in the keyboard settings window of the instrument list (see description of the instrument list). This push-button enables the user to enter the selected position shown on the screen menu list or to confirm selected settings...

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    12 svantek 977w user manual  change the relationship between the y-axis and x-axis of all plots presented on the screen. [ ▲,▼] the ▲ or ▼push-buttons pressed together with enable the user specifically to:  change the mode of result presentation;  programme the real-time clock (rtc) and timer. [i...

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    13 svantek 977w user manual 2.2 input and output sockets of the instrument top cover of the instrument the measurement input is placed in the centre of the instrument’s top cover. It is the tnc compatible socket. The sv 12l microphone preamplifier has a specially designed matching tnc plug and a loc...

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    14 svantek 977w user manual 3. Instrument setting to perform measurements using the instrument the user only should connect the preamplifier with the microphone already screwed on or the proper vibration transducer and to switch the power on by pressing the andpush-buttons at the same time. Hold bot...

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    15 svantek 977w user manual  changing of the value in a selected position is performed by the ◄ or ► push-buttons (or pressed together with ). Option list the option list consists of different choices, from which only one may be selected. The selection of the option is performed as follows. The use...

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    16 svantek 977w user manual  to change the uppercase to lowercase letters or symbols the user has to select abc button and press .  the user can insert, delete or change the position in the edited text using the buttons of the keyboard: ins, del, ◄ and ►.  to confirm the editted name the user has...

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    17 svantek 977w user manual when the instrument is powered from the internal batteries the “battery” icon is presented on the top of the display and the battery window presents the battery status scale and battery voltage: voltage: x.Xxv. The colour of the battery and the scale reflects the battery ...

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    18 svantek 977w user manual setting the measurement parameters the instrument as sold has default settings which the user may change, but always return to them with the use of factory settings option in the auxiliary setup menu. Next chapters of the manual will describe in details what each paramete...

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    19 svantek 977w user manual 3.4. Description of icons description of the instrument state 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 w...

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    20 svantek 977w user manual “clock” icon is displayed when the timer is on. It is active when the instrument is waiting for the measurement start up to occur. When the measurement start up is close, the icon changes its colour to green and starts to blink. “battery” icon is displayed when the instru...

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    21 svantek 977w user manual new file or directory wave file .Wav setup file .Svt managing directories and files the user can manage the files saved on sd card with the help of the file manager or setup manager function of the file menu. The files are saved in the directory, which was set up as a wor...

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    22 svantek 977w user manual the screens below show the automatic file saving during two subsequent measurements. Before and during first measurement the file name l30 is displayed. This file is saved automatically in the sd card memory after the measurement stop. After start of second measurement th...

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    23 svantek 977w user manual after pressing the new file window appears with the predefined name which has number increased by one to the latest saved. In the new file window the user can enter a new name for the file. After edition of the automatically proposed name, the user should select the ok bu...

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    24 svantek 977w user manual the wave file name is defined automatically using the same rules as for the logger files. The default prefix for the wave files is r. Note: during the measurement run with wave recording to the wave file the “note” icon is displayed. Note: the wave files usually are big a...

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    25 svantek 977w user manual 4. Functions of the instrument – function to select the function list, the user should press the push-button, select the function text and press . The function list contains three elements: mode, measurement function and calibration. 4.1. Selection of the instrument mode ...

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    26 svantek 977w user manual optional measurement functions that broaden the application of the instrument can be easily installed. These options can be initially supplied by the manufacturer or purchased later and added by the user. Note: it is not possible to change the measurement function during ...

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    27 svantek 977w user manual that the instrument is in the measurement process. To change the sensitivity, the current measurement in progress must be finished! 4.3.1. System check iso 8041 standard advises users to perform in-situ checks of measurement instrumentation. Checking should be carried out...

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    28 svantek 977w user manual 2.Set the sensitivity of the microphone taken from its calibration certificate using the with ◄ or ► push-buttons and then press . After pressing the push-button and confirmation by selecting yes in the screen with answer “are you sure?” the calibration factor is calculat...

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    29 svantek 977w user manual for an accelerometer with sensitivity higher than 10.0 mv / ms -2 the calibration factor will always be negative. For an accelerometer with sensitivity lower than 10.0 mv / ms -2 the calibration factor will always be positive. The lowest available value of the sensitivity...

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    30 svantek 977w user manual it is recommended to repeat the calibration measurement a few times to ensure the integrity of the calibration. The obtained results should be almost identical (with ±0.1 db difference). Some possible reasons for unstable results are as follows:  the calibrator is not pr...

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    31 svantek 977w user manual note: during the calibration measurement, the external disturbances (vibrations or acoustic noise) should not exceed a value of 1/10 of the level of the calibration level signal being used. 4.3.6. History of calibrations – calibration history the calibration history windo...

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    32 svantek 977w user manual 4.3.8. Post measurement calibration – post calibration sometimes it is required to perform so called post-calibration of the instrument. Position post calibration enables the user to perform additional calibration after a measurement session and add the results to the fil...

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    33 svantek 977w user manual 5. Measurement parameters setting – measurement the measurement list contains the elements that enable the user to set the measurement parameters. To open the measurement list, the user should press the push- button, select the measurement text and press . The measurement...

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    34 svantek 977w user manual 5.1 setting the measurement parameters - general settings the general settings list consists of the following parameters: the delay of the start of measurements (start delay), the maximum delay period for the synchronization with rtc (start sync.), the integration period ...

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    35 svantek 977w user manual note: it is not possible to set the integration period less than 1 minute if repetition cycle is set to inf. This is specific of welmec series of the instruments. To set the integration period the user should define the required hours, minutes and seconds fields. The appr...

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    36 svantek 977w user manual the rolling time(1 & 2) parameters define „time frame” for "rolling leq" calculation. The rolling leq are presented as lr+. For example, if the rolling time is equal to 30 minutes, the appropriate result will be named as lr30 and will be calculated each second as leq of l...

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    37 svantek 977w user manual note: when measurement is waiting for the level trigger the “trigger level” icon appears alternatively with the „play” icon. Or gradient type trigger when grad + is selected, the triggering condition is checked every 0.5 millisecond of the measurement. The measurement is ...

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    38 svantek 977w user manual weighting filter selection sound measurements  z type 1 according to iec 61672-1 standard,  a type 1 according to iec 651 and iec 61672-1 standards,  c type 1 according to iec 651 and iec 61672-1 standards,  b type 1 according to iec 651 standard, vibration measuremen...

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    39 svantek 977w user manual relations between integration period and logger step the logging list enables the user to program the logger functionality - recording of the measurement time history results; and program markers and parameters of the signal recording (event or wave). The logging list con...

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    40 svantek 977w user manual the logger position switches on the functionality, which enables the user to save selected results from the three profiles, spectra as well as meteo results, taken from special meteo module, with the defined interval selected in the logger step position. ► the summary res...

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    41 svantek 977w user manual one number is opened for subsequent measurement data. If spec. Time is selected 6 additional lines appear in the end of the logger setup list. Opening each line the user can define the time of the day when the split will take place. The special screen with time edition is...

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    42 svantek 977w user manual 5.4.4 setting the logger trigger parameters – logger trigger the logger trigger parameters influence the way the measurement results are saved in the logger. It is a context sub-list in which: the trigger can be switched off or its type selected (trigger), the source of t...

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    43 svantek 977w user manual the rms result from the first profile calculated during the period depending on selected detector (1) (path: / measurement / profiles). Pre and post trigger registration in the pre position, the number of the results registered in the logger’s file before the fulfilment o...

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    44 svantek 977w user manual the trigger on marker position switches on or off the triggering by marker. When trigger on marker is switched on then event recording will start by initiation of one of the user controlled markers. Markers for triggering are defined in the markers setup window. In the tr...

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    45 svantek 977w user manual in the trigger period position, it is possible to select the time interval of checking the triggering conditions. This parameter can be set on: log. Step (same as logger step value), 0.5ms, 100.0ms and 1s. In the rec. Time position, it is possible to select the time of si...

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    46 svantek 977w user manual 5.4.7 setting the wave recording – wave recording the wave recording position enables the user to activate and to set the parameters of the raw time waveform recording in the special file with the extension wav. The wav files are saved automatically in the working directo...

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    47 svantek 977w user manual if the integr. Period trigger defined the signal is recorded every time the measurement starts and ended after the integration period time, defined in the general settings window (path: / measurement / general settings). Note: when wave recording is waiting for the slope ...

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    48 svantek 977w user manual 5.5 setting the 1/1 octave and 1/3 octave spectra – spectrum the spectrum position appears in the measurement list when the 1/1 octave or 1/3 octave function is selected in the measurement function list (path: / function / measurement function / 1/1 octave or 1/3 octave)....

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    49 svantek 977w user manual there are two ranges available: high and low. The detailed description of the measurement ranges parameters is given in app. C. After pressing the push- button the change is confirmed and the window closes. Press the push- button to return to the measurement list ignoring...

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    50 svantek 977w user manual the pulse/rot. Position enables the user to select the number of pulses per one rotation. Available values are in the range: 1..360. The unit position enables the user to select the unit of the measurement. Two option are available: revolutions per minute (rpm) and revolu...

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    51 svantek 977w user manual 5.11 programming the instrument’s internal timer – timer the timer position enables the user to programme the internal real time clock to act as a delayed start and stop timer. The instrument can be switched on automatically at the pre-selected programmed time and perform...

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    52 svantek 977w user manual buttons analogously to the start hour position. Note: the instrument’s timer function can be used for multiple measurements (at the programmed day and time with the selected repetition number). The first switch on of the instrument must be within one month ahead. Make sur...

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    54 svantek 977w user manual field description of the one result view 1. Logger file name. 2. Profile number. 3. The value of the measured function. 4. The name of the implemented filter: z, a, c, b, g in case of sound measurements or hp, hp1, hp3, hp10, vel1, vel3, vel10, velmf, dil1, dil3, dil10, w...

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    55 svantek 977w user manual fields description of the one result view 1. Profile number. 2. Function name: spl, leq, sel, lden, lepd, ltm3, ltm5, ln%, ovl, peak, max, min in case of sound measurements or rms, ovl, peak, p –p, mtvv in case of vibration measurements. 3. Detector type: lin when rms int...

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    56 svantek 977w user manual fields description of the 3 profiles view 1. Result line for profile 1. 2. Result line for profile 2. 3. Result line for profile 3. 4. Function name: spl, leq, sel, lden, lepd, ltm3, ltm5, ln%, ovl, peak, max, min in case of sound measurements or rms, ovl, peak, p –p, mtv...

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    57 svantek 977w user manual 2 3 7 8 1 6 4 5 logger view the logger view mode depends on the settings made in the logging list (path: / measurement / logging). If logger (path: / measurement / logging / logger setup) is switched off the logger view mode is not active! So, to have this view mode activ...

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    58 svantek 977w user manual statistics view the statistics position is accessible only for sound measurements. Statistics is the cumulative probability density function of exceeding the noise level during the measurement period. The x axis defines the probability of exceeding the noise level, statis...

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    59 svantek 977w user manual scale of results presentation the scale position defines the units of results: lin (linear) and log (logarithmic). In case of log the graphical presentation is given in the logarithmic scale and the measurement results are expressed in decibels (the result is related to t...

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    60 svantek 977w user manual 6.3 setting view of the logger plot - logger view the logger view position enables the user to change the colour of the logger curves. Every logger curve shows the history of one result measured in a profile, like peak(1). It is possible to include or exclude the curve fr...

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    61 svantek 977w user manual power saver delay the power saver delay defines the delay period from last use of any push- button to the power saver mode. This delay period can be set for dim screen on idle from 5 s to 60 s and for screen off on idle from 1 m to 60 m. The push-button must be pressed fo...

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    62 svantek 977w user manual 7. Managing the files – file the file list enable the user to manage the data and setup files saved in the external memory (micro sd card). The file list contains the following items: file manager enables the user to manage the files saved on sd card; setup manager enable...

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    63 svantek 977w user manual 7.1 managing files saved in the external memory – file manager the file manager is used for checking the memory content, create new directories and files, select directory for saving files, delete files and directories. The list of files and directories is presented in th...

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    64 svantek 977w user manual 7.1.2 opening file – open the user can open logger file from the file list. To do this the user should select the file and press the push-button. After opening the command list select the open position and press again. Opening the measurement file means that the measureme...

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    65 svantek 977w user manual if the delete all command is performed in a root directory, then all files and directories will be erased except three directories: alarm, setup and svantek. These directories are always presented on a sd- disc. 7.1.5 renaming files – rename the user can rename files or d...

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    66 svantek 977w user manual saving the setup files it is possible to save only current instrument’s settings. To save current settings in the setup file the user should press on the save setup position and to edit the setup file name in the special window. Up to 8 characters can be used to name a se...

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    67 svantek 977w user manual 8. Setting the hardware parameters – instrument the instrument list is directly related to the settings of the hardware components of the instrument. To open the instrument list, the user should press the push- button, select the instrument position and press . The instru...

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    68 svantek 977w user manual the view presented on the display for each of three kinds of possible power sources is different. The current battery voltage is displayed together with its approximate state (in graphical format). When the instrument is powered from a set of internal batteries the user s...

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    69 svantek 977w user manual 8.4. Setting the external power parameters - external power the external power position enables the user to select the minimum voltage of the external dc power source, when the instrument should be switched off automatically (power off) or the voltage threshold to switch ...

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    70 svantek 977w user manual push-button working mode selection in the start/stop position the user can choose between direct and with shift. When the direct option is selected, the instrument reacts on each of the push-button press, starting or stopping the measurements. When the with shift option i...

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    71 svantek 977w user manual digital output function of the i/o socket the function position enables the user to set the function of the digital output of the i/o instrument’s socket. The socket can be used as the source of the trigger pulse (trigger pulse ) which starts the measurement in another “s...

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    72 svantek 977w user manual sms message in case of alarm when the alarm is generated during the measurement it is possible to send an sms message to the phone number, defined in the sms option window (path: / instrument / wireless transfer / sms options). E-mail message in case of alarm when the ala...

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    73 svantek 977w user manual time zone can be selected in a special window, which is opened by means of the ◄ or ► push-buttons. 8.9. Setting the remote communication - wireless transfer svan 977w instrument is not equipped with the modem and itself cannot assure data transfer via gprs network. Howev...

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    74 svantek 977w user manual note: for connection with svannet server the positions in the modem list should be set on default values as is shown on the screen-shots abowe and right-side. The modem window contains the following options:  internet cfg – selecting this option ensures that the device i...

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    75 svantek 977w user manual 8.9.3. Setting of support modem options - modem connection the modem connection position enables the user to configure several supporting options required by 3g modem to establish internet connection. More about this option is written in appendix j (configuration and regi...

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    76 svantek 977w user manual editing each position is performed in the special window with the text editor function, which is opened after pressing the ◄ or ► push-buttons. 8.9.4. Configuration of sms service - sms option the sms options position allows the user to configure sms service used for alar...

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    77 svantek 977w user manual if login type is none no user login and user password positions appear. It should be used when smtp server requires no authentication.  sender e-mail – allows the user to enter up to 48 characters of e-mail address from which the e-mail message will be sent.  recipient ...

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    78 svantek 977w user manual 9. Setting the auxiliary parametrs – auxiliary setup the auxiliary setup list provides the user with additional features that allow, for instance, customize the interface device to a specific user and are not directly related to the hardware components of the instrument. ...

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    79 svantek 977w user manual 9.3. Setting the reference levels - reference levels the reference levels sub-list enables the user to set the reference levels of the vibration signal for acceleration (acc), velocity (vel) and displacement (dil). In case of sound measurements - to inform the user about ...

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    80 svantek 977w user manual saving the measurement results in a file when the results not saved position is on, a special warning will be displayed after pressing the push-button in a case when the results of the previous measurement were not saved. The should select one of three answers to the ques...

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    81 svantek 977w user manual 10. Welmec settings – welmec the welmec list contains positions directly related with the welmec requirements for built-for-purpose measuring instrument (type p) for acoustic measurements. This position is active in the sound meter mode. To open the welmec list the user s...

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    82 svantek 977w user manual the record includes: record id number, record crc, time zone, preamplifier and microphone serial numbers, measurement function, compensation filter, range, measurement and pause times, main results. The main results structure depends on the settings in the profiles list. ...

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    83 svantek 977w user manual 10.1.4. Clearing all data records older than 2 years – clear records the clear records position enables the user to delete all records with the creation date older than 2 years from the date of the selected record. Once date selected, a dialogue box appears asking the use...

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    84 svantek 977w user manual in case of program update the second page consists of four positions, which describe the status of program update, the program to be updated (main or bootstrap), version of the software and crc. ▼ in case of date/time change the second page consists of five positions, whi...

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    85 svantek 977w user manual in case of hardware error the second page consists of one positions, which describe the type of error, for example – device parameters. ▼ in case of repair the second page consists of one positions, which describe the id of specific repair that was performed by the servic...

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    86 svantek 977w user manual 10.2.4. Selecting event records by date – find records by date the find record by date position opens the window where the user can select with the use of ◄ or ► and ▲ or ▼ push-buttons the required record creation date. After selecting the date and pressing , the list of...

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    87 svantek 977w user manual after the program dump the bootstrap and program files names are presented on subsequent screens. The user may find the files with the memory dump in the selected directory among other files. Note: the program.Bin file stored on the sd-card is not executable code and cann...

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    88 svantek 977w user manual 10.6.2. Instrument calibration – calibration the calibration sub-list enables the user to calibrate the sound measurement path. The user can calibrate with the use of information of the microphone sensitivity (calibr. By sensitivity) or by performing calibration measureme...

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    89 svantek 977w user manual calibration by measurement calibration by measurement for the sound measurements can be done in the following way: 1. Select the calibration by measurement (highlight the calibr. By measurement text) from the calibration sub-list and press the push-button. 2. Attach the a...

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    90 svantek 977w user manual 10.6.3. Setting the preamplifier serial number – preamplifier the preamplifier position enables the authorised user to input the preamplifier serial number. 10.6.4. Setting the microphone serial number – microphone the microphone position enables the authorised user to in...

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    91 svantek 977w user manual 11. 1/1 and 1/3 octave analyser the instrument operates as a real time 1/1 octave or 1/3 octave analyser (rta) in a very similar way to the level meter. Moreover, 1/1 octave or 1/3 octave analysis is performed in parallel with the slm/ vlm operations. All 1/1-octave (with...

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    92 svantek 977w user manual 11.2. Setting the 1/1 octave or 1/3 octave analyser execution of 1/1 octave or 1/3 octave analysis depends on a certain number of parameters, which can be set in the different windows of the measurement list. The 1/1 octave or 1/3 octave analysis is performed based on the...

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    93 svantek 977w user manual 11.2.2. Setting the parameters of 1/1 octave and 1/3 octave analysis - spectrum for active 1/1 octave or 1/3 octave functions a context element (spectrum) appears on the measurement list (path: / measurement / spectrum). In the spectrum window the user can select the band...

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    94 svantek 977w user manual o ultra (1-31.5k) - 16 filters with centre frequencies 1 hz ÷31.5 khz; => - 1/3 octave: o full (0.8-20k) - 45 filters with centre frequencies 0.8 hz ÷20 khz, => o ultra (0.8-40k) - 48 filters with centre frequencies 0.8 hz ÷20 khz. => weighting filter selection the follow...

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    95 svantek 977w user manual 11.3. Saving the 1/1 or 1/3 octave spectra as a time history – logger results the rms results from 1/1 octave or 1/1 octave analysis can be saved in the logger file together with the logger results and with the step defined by the logger step parameter (path: / measuremen...

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    96 svantek 977w user manual fields description of the spectrum view 1. Type of spectrum 2. Cursor position 3. Value for the cursor position 4. Averaging used 5. Spectrum plot 6. Frequency weighting filter used 7. Total values 8. Central frequency for the cursor position the user can shift the y-axis...

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    97 svantek 977w user manual in case of the sound measurements the scale position is not active. All results are presented in db. => scaling the plot vertical axis the dynamic position enables the user to select the required dynamic range scaling of the spectrum plot. It is possible to select the ran...

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    98 svantek 977w user manual when the averaged or instantaneous spectrum is selected, the user can additionally switch on or off the presentation of the max and/or min values for every displayed spectrum band by switching the max or min parameters on. => the user can easily get into the spectrum view...

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    99 svantek 977w user manual 12. Fft analyser the instrument operates as fft analyser in a very similar way to the level meter. Moreover, fft analysis is performed in parallel with the slm or vlm operations. The results of fft analysis (spectra) can be examined by the user on a display in the spectru...

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    100 svantek 977w user manual 12.2.1. Setting the measurement range for fft - range for the fft function the user can select the input ranges specified in appendix c, named as low and high. The selection of the input range is doing in the range window of the measurement list. Depending on the setting...

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    101 svantek 977w user manual there are two averaging options: linear and exponential. In case of exponential averaging an additional position appears in this window: time constant. The time constant parameter can be selected from the values: 100ms, 125ms, 200ms, 500ms, 1.0s, 2.0s, 5.0s and 10.0s. ► ...

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    102 svantek 977w user manual 12.2.3. Presentation of fft spectra the spectrum position of the display modes list becomes available in the fft function and enables the user to switch on or off the spectrum view. => fields description of the spectrum view 1. Type of spectrum 2. Cursor position 3. Valu...

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    103 svantek 977w user manual 12.2.4. Setting scale of spectrum plot - scale the display scale sub-list enables the user to change the scale of the spectrum plot, switch the grid on or off. Scale of results presentation the scale position defines the units of results: lin (linear) and log (logarithmi...

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    104 svantek 977w user manual 12.2.5. Selecting the spectrum types to be viewed - spectrum view in the spectrum view window (path: menu> / display / spectrum view), the user can select the different spectra to be visible on the display. In the spectrum view window the following spectrum types may be ...

  • Page 105

    105 svantek 977w user manual 13. Reverberation time measurement - rt60 the rt60 analysis is an optional function of the svan 977w instrument, which provides reverberation time calculation for 1/1 octave bands (from 63hz to 16khz) or 1/3 octave bands (from 50 hz to 20 khz) and three total rms levels ...

  • Page 106

    106 svantek 977w user manual the rt60 settings list enables the user to select the method for rt60 calculation, select the name of the file, where the registered data will be collected, and other parameters for rt60 calculation. The start delay position defines the delay period from the moment the p...

  • Page 107

    107 svantek 977w user manual the averaging position enables the user to activate the averaging of the reverberation time results from several measurements. When this option is switched on the averaging position appears on the rt60 bar plot. To make averaging of the new results with the results calcu...

  • Page 108

    108 svantek 977w user manual the logger name position enables the user to define the name of the logger file in which the data of the rt60 analysis will be recorded. The name can be up to eight characters long. After pressing the ◄ or ► push-buttons, the special window with text editor is opened. ► ...

  • Page 109

    109 svantek 977w user manual  noise mar.: 10.0db  level: 100db 2. Place the sound power source in the measured room (for the sound power source location - see the reverberation time measurement iso standard). 3. Place the microphone in one of the selected measurement points (for the measurement po...

  • Page 110

    110 svantek 977w user manual note: the proper value of the sound level trigger threshold should be set well above the background noise and significantly below the maximum sound level emitted by the impulse source. 2. Place the microphone in one of the selected measurement points (for the measurement...

  • Page 111

    111 svantek 977w 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. Cursor position value (central 1/3 octave band frequency) changing the...

  • Page 112

    112 svantek 977w user manual changing the data type when the field 9 is active the type of data displayed (raw, smoothed or integrated) can be changed after pressing the ◄and► push-buttons together with . ► > changing the 1/3 octave band when the field 3 is active the central frequency of 1/3 octave...

  • Page 113

    113 svantek 977w user manual 14. Maintenance 14.1. Powering the instrument the svan 977w can be powered by one of the following sources:  four aa standard size internal batteries. In case of alkaline type, a new fully charged set can operate more than 12 h (6.0 v / 1.6 ah). Instead of the ordinary ...

  • Page 114

    114 svantek 977w user manual svan 977w is delivered with 4gb micro sd-card. The user may exchange it with the high capacity card (up to 32gb), but before insertion the card must be formatted as fat32. Note: if the user would like to use card with higher capacity, he must call to the local distribute...

  • Page 115

    115 svantek 977w user manual accelerometer optionally general purpose vibration accelerometer 100 mv/g (10 mv/ms -2 ) (sv 80) with a coiled cable for accelerometer 2 m (sc 27) can be used. The sv 80 is an industry standard iepe accelerometer offered to svan 977w. It is an ideal choice for walk-aroun...

  • Page 116

    116 svantek 977w user manual 14.6. Storing the instrument to preserve the life of the internal batteries, it is recommended that the instrument is turned off when it is stored. In case of alkaline batteries, it is recommended to extract them out of the instrument. Do not store the instrument permane...