Svantek SV 971A User manual

USER MANUAL
SV 971A
POCKET-SIZE
SOUND LEVEL METER
& ANALYSER
Warsaw, 2021-09-23
Rev. 1.00
Copyright © 2021 SVANTEK.
All rights reserved.

SV 971A User Manual
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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'smanual please
visit our web site at www.svantek.com.
This user’s manual presents the firmware revision named 1.05.
The succeeding software revisions (marked with the higher numbers) can change the view of some
displays presented in the text of the manual.
WEEE Note: Do not throw the device away with the unsorted municipal waste at the end of its
life. Instead, hand it in at an official collection point for recycling. By doing this you will help to preserve
the environment.
The software described in this manual is furnished under a license agreement and may be used only in
accordance with the terms of that agreement.
Copyright Notice
Copyright © 2021 Svantek Sp. z o.o.
All rights reserved.
Reproduction without permission is prohibited.
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Microsoft, Windows, Excel and Word are registered trademarks of Microsoft Corporation.
The Bluetooth®word mark and logos are registered trademarks owned by Bluetooth SIG, Inc.
Disclaimer
Information in this document is subject to change without notice and does not represent a commitment
on the part of Svantek.
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.
Information provided in this manual is intended to be accurate and reliable. However, Svantek assumes
no responsibility for its use, or for any infringements on the rights of third parties that may result from
its use.
This product might include unintentional technical or typographical errors. Changes are periodically
made to the information herein to correct such errors, and these changes are incorporated into new
editions of the publication.
Technical Support Contact Information:
web: www.svantek.com
e-mail: [e-mail]

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CONTENTS
INDEX............................................................................................................................................................... 9
1INTRODUCTION ...................................................................................................................................... 12
1.1 SV 971A AS SOUND LEVEL METER &ANALYSER ......................................................................................... 12
1.2 GENERAL FEATURES OF SV 971A ............................................................................................................. 13
1.3ACCESSORIES INCLUDED ......................................................................................................................... 13
1.4 ACCESSORIES AVAILABLE ........................................................................................................................ 14
1.5 FIRMWARE OPTIONS AVAILABLE ............................................................................................................... 14
2GENERAL INFORMATION ........................................................................................................................ 15
2.1 MEASUREMENT CONFIGURATIONS ............................................................................................................ 15
2.2 INPUT AND OUTPUT SOCKETS OF THE INSTRUMENT........................................................................................ 16
2.3 INSTRUMENT POWER............................................................................................................................. 17
2.4 CONTROL KEYS ON THE FRONT PANEL......................................................................................................... 18
2.5 WORKING WITH THE INSTRUMENT ............................................................................................................ 19
2.5.1 Measurement mode................................................................................................................. 19
2.5.2 Configuration mode ................................................................................................................. 20
2.6 DEFAULT SETTINGS ............................................................................................................................... 23
2.7 DESCRIPTION OF ICONS .......................................................................................................................... 24
2.8 OVERLOAD AND UNDERRANGE DETECTION .................................................................................................. 25
2.9 SAVING DATA ...................................................................................................................................... 25
2.10 DOWNLOADING AND UPLOADING FILES ...................................................................................................... 27
2.11 ACTIVATING OPTIONAL FUNCTIONS ........................................................................................................... 27
3MEASUREMENT FUNCTIONS AND CALIBRATION –FUNCTION ................................................................ 28
3.1 ACTIVATING MEASUREMENT FUNCTIONS –MEASUREMENT FUNCTION .............................................................. 28
3.2 CALIBRATION OF THE INSTRUMENT –CALIBRATION ....................................................................................... 28
3.2.1 Calibration –By Measurement ................................................................................................. 29
3.2.2 Last calibration record –Last Calibration .................................................................................. 30
3.2.3 History of calibrations –Calibration History .............................................................................. 30
3.2.4 Erasing calibration records –Clear History................................................................................ 31
3.2.5 Post measurement calibration –Post Calibration...................................................................... 31
3.2.6 Automatic calibration –Auto Calibration .................................................................................. 31
4CONFIGURING MEASUREMENT PARAMETERS –MEASUREMENT ........................................................... 33
4.1 SETTING GENERAL MEASUREMENT PARAMETERS –GENERAL SETTINGS............................................................... 33
4.2 SETTING MEASUREMENT TRIGGER –MEASUREMENT TRIGGER ......................................................................... 35
4.3 SETTING PARAMETERS FOR PROFILES –PROFILES .......................................................................................... 37
4.4 SETTING ALARM THRESHOLDS FOR DOSE METER –ALARM ............................................................................... 38
4.5 CONFIGURING DATA LOGGING –LOGGING .................................................................................................. 38
4.5.1 Setting general logging parameters –Logger Setup.................................................................. 39

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4.5.2 Selecting results for logging –Logger Results............................................................................ 40
4.5.3 Configuring Logger trigger –Logger Trigger ............................................................................. 41
4.5.4 Configuring signal recording –Wave Recording ........................................................................ 42
4.6 SELECTING MEASUREMENT RANGE –RANGE................................................................................................ 45
4.7 SELECTING MICROPHONE COMPENSATION –COMPENSATION FILTER ................................................................. 45
4.8 SETTING STATISTICAL LEVELS –STATISTICAL LEVELS ....................................................................................... 46
4.9 PROGRAMMING INSTRUMENT’S INTERNAL TIMER –TIMER .............................................................................. 46
4.9.1 Example of timer execution ...................................................................................................... 47
5CONFIGURING DATA VIEWING –DISPLAY............................................................................................... 48
5.1 ENABLING VIEWS –DISPLAY MODES ......................................................................................................... 48
5.1.1 One Result view........................................................................................................................ 48
5.1.2 Three profiles view ................................................................................................................... 50
5.1.3 Logger view.............................................................................................................................. 50
5.1.4 Statistics view .......................................................................................................................... 51
5.1.5 Running SPL view ..................................................................................................................... 51
5.1.6 File information view................................................................................................................ 51
5.2 ADJUSTING PLOT SCALE –DISPLAY SCALE ................................................................................................... 51
5.3 SELECTING MEASUREMENT RESULTS FOR PRESENTATION –MEASUREMENT RESULTS ............................................. 52
5.4 CHOOSING LOGGER RESULTS FOR PRESENTATION –LOGGER RESULTS................................................................ 52
5.5 CONFIGURING POWER SAVER –SCREEN SETUP ............................................................................................ 53
6MANAGING FILES –FILE.......................................................................................................................... 54
6.1 MANAGING FILES –FILE MANAGER .......................................................................................................... 55
6.1.1 Assigning the directory for saving data files –Working Directory .............................................. 55
6.1.2 Renaming files/directories –Rename........................................................................................ 56
6.1.3 Viewing information about files/directories –Info .................................................................... 56
6.1.4 Deleting files/directories –Delete............................................................................................. 56
6.1.5 Erasing memory –Erase Disk.................................................................................................... 56
6.2 MANAGING SETUP FILES –SETUP MANAGER ............................................................................................... 56
7CONFIGURING INSTRUMENT –INSTRUMENT ......................................................................................... 58
7.1 CHOOSING USER INTERFACE MODE –USER INTERFACE ................................................................................... 58
7.2 CHECKING POWER –BATTERY.................................................................................................................. 59
7.3 PROGRAMMING KEYBOARD FUNCTIONS –KEYBOARD .................................................................................... 59
7.4 AUTOMATIC POWER OFF –POWER OFF ..................................................................................................... 60
7.5 CONFIGURING USB INTERFACE –USB....................................................................................................... 60
7.6 SETTING INTERFACE PARAMETERS –COMMUNICATION PORTS ......................................................................... 60
7.7 SELF-VIBRATION MARKER –SELF VIBRATION ............................................................................................... 61
7.8 PROGRAMMING INTERNAL REAL TIME CLOCK –RTC..................................................................................... 61
7.9 CHECKING INSTRUMENT PROPERTIES –UNIT LABEL ....................................................................................... 61

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8AUXILIARY SETTINGS –AUXILIARY SETUP ............................................................................................... 62
8.1 SELECTING USER INTERFACE LANGUAGE –LANGUAGE .................................................................................... 62
8.2 RESTORING FACTORY SETTINGS –FACTORY SETTINGS .................................................................................... 62
8.3 VOICE COMMENTS –COMMENTS ............................................................................................................. 63
8.4 DISPLAYING LEQ & LAV RESULTS –LEQ & LAV ............................................................................................ 63
8.5 ACTIVATING WARNINGS –WARNINGS ....................................................................................................... 63
9PRINTING REPORTS –REPORT ................................................................................................................ 65
9.1 PRINTING MEASUREMENT RESULTS –PRINT ................................................................................................ 65
9.2 SELECTING PRINTING OPTIONS –OPTIONS .................................................................................................. 66
9.3 SELECTING RESULTS FOR THE REPORT –RESULTS........................................................................................... 67
9.4 SELECTING STATISTICS FOR THE REPORT –STATISTICS ..................................................................................... 67
9.5 SELECTING SPECTRA FOR THE REPORT –SPECTRUM ....................................................................................... 67
9.6 PRINTER SETTINGS –PRINTER .................................................................................................................. 68
10 1/1- AND 1/3-OCTAVE ANALYSER ....................................................................................................... 69
10.1 SELECTING 1/1 OCTAVE OR 1/3 OCTAVE FUNCTION ..................................................................................... 69
10.2 CONFIGURING 1/1- OR 1/3-OCTAVE ANALYSER ........................................................................................... 69
10.2.1 General measurement settings for 1/1 and 1/3-octave analysis –General Settings ................... 69
10.2.2 Selecting measurement range for 1/1- and 1/3-octave analysis –Range ................................... 70
10.2.3 Logging of 1/1- and 1/3-octave spectra –Logging .................................................................... 70
10.2.4 Setting parameters of 1/1- and 1/3-octave analysis –Spectrum................................................ 70
10.3 CONFIGURING 1/1- AND 1/3-OCTAVE SPECTRA VIEWS .................................................................................. 71
10.3.1 Presentation of 1/1- and 1/3-octave spectra............................................................................. 71
10.3.2 Adjusting spectrum graph scale –Display Scale ........................................................................ 72
10.3.3 Selecting spectra to be viewed –Spectrum View ....................................................................... 72
11 SOUND EXPOSURE METER –DOSIMETER............................................................................................ 74
11.1 SELECTING DOSIMETER FUNCTION ............................................................................................................ 74
11.2 SETTING GENERAL PARAMETERS –GENERAL SETTINGS ................................................................................... 74
11.3 SETTING PROFILE PARAMETERS –PROFILE X................................................................................................ 74
11.4 CHECKING MEASUREMENT RANGE –RANGE ................................................................................................ 75
11.5 SETTING EXPOSURE TIME –EXPOSURE TIME................................................................................................ 75
11.6 SETTING ALARM THRESHOLDS FOR DOSE METER RESULTS –ALARM.................................................................... 75
11.7 DISPLAYING DOSIMETER RESULTS ............................................................................................................. 76
11.7.1 Displaying of Leq & Lav results –Leq & Lav............................................................................... 76
12 REVERBERATION TIME MEASUREMENTS –RT60................................................................................. 77
12.1 SELECTING RT60 FUNCTION.................................................................................................................... 77
12.2 SETTING RT60 PARAMETERS –RT60 SETTINGS ........................................................................................... 77
12.3 STARTING RT60 MEASUREMENTS............................................................................................................. 79
12.4 VIEWING RT60 RESULTS ........................................................................................................................ 80

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12.5 AVERAGING RT60 RESULTS..................................................................................................................... 80
13 STI CALCULATIONS –STIPA ................................................................................................................. 81
13.1 STI METHOD BACKGROUND .................................................................................................................... 81
13.2 SELECTING STIPA FUNCTION................................................................................................................... 81
13.3 STIPA MEASUREMENT AND CALCULATION PROCESS ...................................................................................... 82
13.3.1 Measured results...................................................................................................................... 82
13.3.2 Project structure....................................................................................................................... 84
13.3.3 Results averaging..................................................................................................................... 85
13.3.4 STIPA settings .......................................................................................................................... 85
13.3.5 Considering ambient noise distortions ...................................................................................... 87
13.3.6 STIPA measurements................................................................................................................ 87
13.4 FILES DOWNLOADING AND DATA PROCESSING .............................................................................................. 90
13.4.1 Measurement with BA Assistant............................................................................................... 90
13.4.2 Measurement with SV 971A without BA Assistant..................................................................... 91
13.4.3 Presentation of STIPA results.................................................................................................... 93
13.4.4 Changing background noise values........................................................................................... 94
13.4.5 Generating reports................................................................................................................... 94
14 ASSISTANT MOBILE APPLICATION....................................................................................................... 95
14.1 INSTALLING ASSISTANT ON A MOBILE DEVICE ............................................................................................... 95
14.2 CONNECTION VIA BLUETOOTH®................................................................................................................ 95
14.3 CONTROL VIA BLUETOOTH®..................................................................................................................... 96
14.3.1 Instruments’ status screen........................................................................................................ 97
14.3.2 Results view / control screen .................................................................................................... 98
14.3.3 SMS and e-mail notifications .................................................................................................. 100
14.1 CHECKING THE SOFTWARE VERSION AND EXITING THE APPLICATION ................................................................. 101
15 GENERAL PURPOSE AND SPECIAL SOFTWARE ................................................................................... 102
15.1 SVANPC++....................................................................................................................................... 102
15.2 SUPERVISOR...................................................................................................................................... 106
15.3 BA ASSISTANT ................................................................................................................................... 108
16 MAINTENANCE ................................................................................................................................. 111
16.1 REPLACING BATTERIES ......................................................................................................................... 111
16.2 EXTRACTING AND INSERTING THE MEMORY CARD........................................................................................ 111
16.3 REPLACING THE MICROPHONE AND MICROPHONE PREAMPLIFIER .................................................................... 111
16.4 RESETTING THE INSTRUMENT................................................................................................................. 112
16.5 UPGRADING THE FIRMWARE.................................................................................................................. 112
16.6 PRESERVATION OF INTERNAL BATTERIES ................................................................................................... 113
16.7 TRANSPORTATION AND STORAGE ............................................................................................................ 113
16.8 CLEANING ........................................................................................................................................ 113

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16.9 TROUBLESHOOTING ............................................................................................................................ 113
17 GLOSSARY......................................................................................................................................... 114
17.1 MODES AND MEASUREMENT FUNCTIONS................................................................................................. 114
17.2 CALIBRATION .................................................................................................................................... 115
17.3 MEASURED RESULTS ........................................................................................................................... 117
17.4 MEASUREMENT PARAMETERS................................................................................................................ 121
17.5 DISPLAY PARAMETERS.......................................................................................................................... 133
17.6 INSTRUMENT PARAMETERS ................................................................................................................... 137
17.7 AUXILIARY PARAMETERS....................................................................................................................... 139
17.8 REPORT ........................................................................................................................................... 140
APPENDIX A. REMOTE CONTROL.................................................................................................................. 141
A.1 INPUT/OUTPUT TRANSMISSION TYPES ..................................................................................................... 141
A.2 FUNCTION #1 –GENERAL CONTROL FUNCTIONS ......................................................................................... 141
A.3. FUNCTION #2 –MEASUREMENT RESULTS READ-OUT IN THE SLM MODE ............................................................... 143
A.4. FUNCTION #3 –MEASUREMENT RESULTS READ-OUT IN 1/1- AND 1/3-OCTAVE MODES ............................................ 146
A.5. FUNCTION #4 –SETUP FILE READ-OUT.......................................................................................................... 147
A.6. FUNCTION #5 –STATISTICAL ANALYSIS RESULTS READ-OUT ................................................................................ 148
A.7. FUNCTION #7 –SPECIAL CONTROL FUNCTIONS ............................................................................................... 149
A.8. FUNCTION #9 –SETUP FILE WRITE-IN ........................................................................................................... 149
A.1 FUNCTION #D –DATA FILES ACCESS ........................................................................................................ 150
A.2 FUNCTION #S –DIRECT SETUP ACCESS ..................................................................................................... 151
A.3 CONTROL SETTING CODES ..................................................................................................................... 152
APPENDIX B. DATA FILE STRUCTURES........................................................................................................... 179
B.1 GENERAL STRUCTURE OF THE SV 971A FILES ............................................................................................ 179
B.2 STRUCTURE OF THE FILE CONTAINING RESULTS FROM LOGGER’S FILE ................................................................ 201
B.2.1. The contents of the files in the logger........................................................................................... 201
B.2.1.1. Record with the results.......................................................................................................................... 201
B.2.1.2. Record with the state of the markers ..................................................................................................... 203
B.2.1.3. Record with the breaks in the results registration................................................................................... 203
B.2.1.4. Record with the breaks account PAUSE in the results registration........................................................... 203
B.2.1.5. Record with the wave file name............................................................................................................. 203
B.2.1.6. Record with Summary Results................................................................................................................ 204
B.2.1.8. Record with name of the comment file .................................................................................................. 204
B.2.1.9. Record with GPS data ............................................................................................................................ 205
B.3 STRUCTURE OF THE SETUP FILE ............................................................................................................. 206
B.4 DATE AND TIME ................................................................................................................................. 206
APPENDIX C. TECHNICAL SPECIFICATIONS .................................................................................................... 207
C.1 SPECIFICATION OF SV 971A AS SOUND LEVEL METER (SLM) ....................................................................... 207
C.1.1 Specification of SV 971A as SLM in the standard configuration.................................................... 207

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C.1.2 Effect of the SA 22 windscreen ...................................................................................................... 227
C.1.3 Effect of the SA 271A outdoor microphone kit ............................................................................... 239
C.1.4 Effect of Vibration......................................................................................................................... 239
C.2 SPECIFICATION OF SV 971A AS 1/1 OCTAVE AND 1/3 OCTAVE ANALYSER ....................................................... 241
C.2.1 Specification of SVAN 971A as 1/1- and 1/3-octave analyser in the standard configuration............ 241
C.2.2 1/1 and 1/3 octave filters ........................................................................................................... 244
C.3 FREQUENCY CHARACTERISTICS OF THE IMPLEMENTED DIGITAL FILTERS .............................................................. 253
C.4 MISCELLANEOUS SPECIFICATION OF SV 971A ........................................................................................... 255
C.5 USING THE SA 271A OUTDOOR MICROPHONE KIT ..................................................................................... 260
C.6 DECLARATION OF CONFORMITY ............................................................................................................. 283
APPENDIX D. DEFINITIONS AND FORMULAE OF MEASURED VALUES...................................................... 284
D.1 BASIC TERMS AND DEFINITIONS .............................................................................................................. 284
D.2 DEFINITIONS AND FORMULAS OF THE SLM RESULT...................................................................................... 285
D.3 DEFINITIONS AND FORMULAS OF THE ADDITIONAL DOSIMETER FUNCTION RESULTS.............................................. 288
D.4 STATISTICAL LEVELS –LN DEFINITION ....................................................................................................... 289
APPENDIX E. REVERBERATION TIME CALCULATIONS.................................................................................... 291
E.1 INTRODUCTION .................................................................................................................................. 291
E.2 DEFINITIONS AND CALCULATION OF THE RT 60 REVERBERATION TIME.............................................................. 292
E.3 DESCRIPTION OF THE DECAY CURVE RECORDING IN DIFFERENT MEASUREMENT METHODS ...................................... 294
APPENDIX F. SA 271A OUTDOOR MICROPHONE KIT ASSEMBLY GUIDE ........................................................ 297
F.1 PART SET ......................................................................................................................................... 297
F.2 ASSEMBLY OF SA 271A....................................................................................................................... 299
F.3 IMPORTANT NOTES ............................................................................................................................. 305

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INDEX
1
1/1-octave · 28, 69
1/3-octave · 28, 69
3
3 Profiles view · 50
A
Accessories · 13
Advanced interface · 58
Airport compensation · 46
Alarm · 38, 75
Auto calibration · 31
Auto rotation · 53
Automatic file saving · 26
Automatic pauses · 74
Autoscale · 52, 72
Auxiliary settings · 62
Averaged spectrum · 72
B
Battery · 59
Bluetooth · 60
C
Calibration · 28
Calibration by measurement · 29
Calibration drift · 29
Calibration factor · 29
Calibration history · 30, 31
Calibration level · 29
Calibration result · 29
Compensation filter · 45
Complex parameter · 22
Configuration mode · 20
Control keys · 18
Criterion level · 75
D
Day time limits · 35
Decay · 77
Decay method · 79
Default settings · 23
Deleting files · 56
Detector · 38, 75
Directory · 55
Display colour · 53
Display mode · 19, 48, 71
Display scale · 51, 72
Display settings · 48
Dosimeter · 28, 74
Dosimeter results · 76
Downloading · 27
Dynamics · 52, 72
E
Environment compensation · 46
Erasing disk · 56
Exchange rate · 75
Exponential integration · 35
Exposure time · 75
F
Factory settings · 23, 62
File info view · 51
File information · 56
File manager · 26, 55
File name · 78
Files · 54
Filter · 37, 70, 74
Filter Peak · 37
Firmware options · 14
Firmware upgrade · 105
Function · 28
G
General settings · 33, 69, 74
Gradient · 45
Gradient threshold · 37
Gradient trigger · 37, 43
Grid · 52, 72
H
Help information · 23
I
Icons · 24

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Impulse · 77
Impulse method · 79
Impulse response method · 77
Inactive parameters · 23
Information screen · 22
Input/output · 15, 16
Instantaneous spectrum · 72
Instrument settings · 58
Integration period · 34, 38, 69
Integration period trigger · 44
Interrupted noise method · 77
K
Key lock · 59
Keyboard · 18, 59
L
Language · 62
Last calibration · 30, 31
Leq & Lav display · 63, 76
LEQ integration · 35
Level · 78
Level meter · 28
Level threshold · 37
Level trigger · 36, 41, 43
Linear integration · 35
List of options · 22
List of parameters · 21
Logger · 26, 39
Logger name · 40
Logger results · 40, 52, 70
Logger setup · 39
Logger split · 39
Logger step · 38, 70
Logger trigger · 41
Logger view · 50
Logging · 38, 70
Low range · 45
M
Main menu · 21
Manual trigger · 44
Matrix of parameters · 22
Max spectrum · 72
Measurement function · 28, 69, 74, 77, 81
Measurement mode · 19
Measurement settings · 33
Measurement trigger · 35
Measurement view · 19
Memory · 25
Menu position · 21
Min spectrum · 72
N
New directory · 55
Noise margin · 78
Normal range · 45
O
One result view · 48
Opening position · 21
Optional functions · 27
P
Post-calibration · 31
Post-trigger · 42
Power Off · 60
Power saver · 53
Powering · 17
Pre-trigger · 42, 45
Print options · 66
Print results · 65
Printed results · 67
Printed spectrum · 67
Printed statistics · 67
Printer settings · 68
Profiles · 37, 74
PTC threshold level · 75
R
Range · 45, 70
Recording · 42
Recording time · 45, 78
Renaming files · 56
Repetition cycles · 34, 38, 69
Report · 65
Resetting · 105
Results presentation · 19
Results view · 48, 71
Rolling Leq · 35
RT averaging · 78
RT frequency range · 78
RT method · 78
RT octave · 78
RT step · 78
RT60 averaging · 80
RT60 settings · 77
RTC · 61
Running LEQ · 28, 77
Running SPL · 19
Running SPL view · 51
S
Screen dim · 53
Screen setup · 53

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SD card · 25, 55, 104
Self vibration · 60
Setup manager · 27, 56
Shift key mode · 59
Simple interface · 58
SLM/Dosimeter results · 52
Slope trigger · 36, 43
Sound analyser · 12
Sound level meter · 12
Spectrum · 71
Spectrum settings · 70
Spectrum view · 71
Speech intelligibility · 81
Start delay · 34
Start measurements · 20
Start synchronisation · 34
Start/Stop interface · 58
Statistics view · 51
STI · 81
STIPA · 81
Summary results · 38, 40, 70
T
Text editor · 22
Threshold level · 75
Timer · 46
Total value · 69
Trigger level · 41
Trigger source · 37, 41, 44
Trigger step · 44
Troubleshooting · 106
Turn on · 19
U
ULT threshold level · 75
Unit label · 61
Uploading · 27
USB · 60, 95
User interface · 20, 58
V
Viewed spectra · 72
Voice comments · 63
W
Warnings · 63
Wave recording · 42
Working directory · 55

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1 INTRODUCTION
SV 971A is an extremely small Class 1 IEC 61672-1:2013 Sound
Level Meter (SLM) with the optional real time 1/1 & 1/3 octave
analyser and Sound Exposure Meter (SEM) conforming to
international standards ISO 9612 and OSHA (IEC 61252;
ANSI S1.25).
The new user interface of this instrument makes measurement
configuration as easy as possible. This all makes SV 971A an
ideal choice for industrial hygiene noise measurements, short
period environmental noise measurements, acoustics consultancy
surveys, technical engineers dealing with noise issues and
general acoustics noise measurements.
The instrument enables huge time history logging capability
providing broad band results and spectra with adjustable double
(long and short) logging steps. Audio recording on user selectable
trigger conditions complete the logging functionality. Data are
stored on a microSD memory card and can be easily downloaded
to a PC over the USB-C or optional RS 232 interface. Direct
printing feature enables quick on-site printing with the use of
optional portable printer.
The instrument can be easily calibrated in the field using a sound
calibrator. The calibration process can be automatically activated
whenever a sound calibrator with the auto run function is installed
on the microphone.
SV 971A comes with Svantek dedicated software packages –
Supervisor for data downloading, visualization, basic post-
processing and exporting to commonly used office software
applications and also with the full analysis package SvanPC++
that enables advanced data processing and analysis, visualization
and automated reporting.
SV 971A is equipped with the Bluetooth®1module and can be
remotely control by the BA Assistant smartphone application
smartphone application dedicated for building acoustics and
speech intelligibility measurements.
Thanks to a robust pocket size housing and Low Energy Long Range Bluetooth®Smart wireless
interface, this instrument is an excellent tool for anyone who deals with acoustic measurements.
1.1 SV 971A AS SOUND LEVEL METER &ANALYSER
•SLM mode: Lpeak, Lmax, Lmin, L,Leq, LE, Lden, LEPd, Ltm3,Ltm5, Leq statistics (Ln),
expected Leq value (EX), standard Leq deviation (SD), measurement time and overload time %
(OVL) and two rolling Leq (LR1 and LR2) with Class 1 IEC 61672-1:2013 accuracy in the
frequency range 5 Hz ÷20 kHz
•SEM mode: Lpeak, Lmax, Lmin, L, Leq, LE, LEPd, Ltm3,Ltm5, Leq statistics (Ln), expected
Leq value (EX), standard Leq deviation (SD), Lc-a, DOSE, D_8h, PrDOSE,LAV, SEL8(LAE8),
PSEL(PLAE), E, E_8h, peak counter (PTC), peak threshold (PTP), upper limit time (ULT), TWA,
PrTWA, measurement time and overload time % (OVL) with Class 1 IEC 61672-1:2013 accuracy
in the frequency range 5 Hz ÷20 kHz
1
“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.

SV 971A User Manual
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•Parallel Impulse, Fast and Slow detectors for the measurements with A, B, C, Zand LF
frequency filters
•Two measurement ranges 25 dBA LEQ ÷ 123 dB Peak (Low) and 30 dBA LEQ ÷ 140 dB Peak
(High).
•1/1 Octave real-time analysis (option). Eleven 1/1-octave filters with center frequencies from
16.0 Hz to 16 kHz (meeting Class 1 requirements of IEC 61260-1:2014) available simultaneously
with three user definable profiles for broadband measurements (SLM and SEM), time history
logging and audio recording
•1/3 Octave real-time analysis (option). Thirty-five 1/3-octave filters with center frequencies from
8 Hz to 20 kHz (meeting Class 1 requirements of IEC 61260-1:2014) available simultaneously
with three user definable profiles for broadband measurements (SLM and SEM), time history
logging and audio recording
•Audio signal recording (option),trigger and continuous mode, 12 kHz and 24kHz sampling rate,
WAV format
•Reverberation time RT60 analysis function (option) for 1/1 octave bands or 1/3 octave bands and
three total RMS levels (A, Cand Zweighted) in accordance with the ISO 3382 standard.
•STIPA (speech transmission index for public address systems) measurements of electro-acoustic
and acoustic environments effects that affect the speech intelligibility in the room acoustics and/or
public address systems.
1.2 GENERAL FEATURES OF SV 971A
•Sound Level Meter in extremely small pocket size body
•Noise measurements meeting Class 1 IEC 61672-1:2013 accuracy
•Two overlapping wide measurement ranges
•1/1 & 1/3 octave real-time frequency analysis (option)
•Dosimeter function for personal noise monitoring in the workplace (option)
•Audio signal recording (option)
•Reverberation time function (option)
•Speech transmission index function (option)
•Audio records on demand, created before or after measurement, added to a measurement file
•Statistical analysis with up to 10 percentile values
•Time-history with two logging step intervals
•Automated calibration start and save
•Free-field & diffuse-field measurements
•Integration measurement run time programmable up to 24 h
•Wireless connectivity with low energy Long Range Bluetooth®Smart (4.2) interface
•Setup editor available with Supervisor or SvanPC++ software
•Super contrast colour OLED display
•Bluetooth®for remote control by the BA Assistant smartphone applications
•Wide range of temperature operating conditions
•Very handy, light weight and robust pocket size case
•Easy and friendly user interface for quick start and stop
1.3 ACCESSORIES INCLUDED
•ACO 7152 prepolarised ½” condenser microphone with nominal sensitivity 32 mV/Pa
•SV 18A microphone preamplifier
•SC 158 USB type C to USB type A cable
•SA 22 foam windscreen
•batteries four AAA type

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1.4 ACCESSORIES AVAILABLE
•SV 36 Class 1 sound calibrator: 94dB/114 dB/1000 Hz
•SP 75 RS232 interface option with external power supply plug
•SC 91A/05 extension cable for SV 18A, 5 meters (for laboratory purposes)
•SA 72 carrying case for SV 971A and accessories (waterproof)
•SA 80 pocket soft bag
•SA 271A outdoor microphone kit
•SA 270D desiccator for the SA 271A outdoor microphone kit
•SvanPC++_EM environmental monitoring module for SvanPC++ (hardware key, single license)
1.5 FIRMWARE OPTIONS AVAILABLE
•SF 971A_P1 Package SF 971A_1 1/1 & 1/3 octave and audio recording
•SF 971A_P2 Package SF 971A_5 RT60, SF 971A_20 STIPA, BA_Assistant APP,
SvanPC++_BA (not included SF971A_3 1/1 & 1/3 octave)
•SF 971A_P3 Package including P1, P2 packages
•SF 971A_1 1/1 octave analysis option
•SF 971A_5 Reverberation time analysis (RT60) option, SvanPC++_BA and
BA_Assistant APP option
•SF 971A_10 Noise dosimetry option
•SF 971A_15 Audio events recording option
•SF 971A_20 STIPA function with mobile APP option
Note: The software options listed above can be purchased at any time, as only the entry of a
special unlocks code is required for their activation.

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2 GENERAL INFORMATION
2.1 MEASUREMENT CONFIGURATIONS
The instrument's normal operating mode as SLM assumes operating with the preamplifier and
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
for specification).
In the case of significant differences between the instrument’s temperature and the ambient temperature
at the measuring point, long enough acclimatization of the instrument is recommended so that its
temperature is as close to the ambient temperature as possible.
In the case of measurements in the presence of wind, it is necessary to use a windscreen. The
windscreen should be simply installed over the microphone with the preamplifier without any significant
force.
To have measurements in accordance with the IEC 61672-1:2013 standard it is necessary to set the
appropriate compensation in the Compensation Filter screen (see Chapter 4.7).
When measuring in the diffusion field (in small spaces) it is recommended to switch on the filter for the
diffusion field.
Chapter 16.3 presents the way the microphone should be attached to the preamplifier and the
preamplifier to the instrument.

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Before starting measurements, the instrument should be
calibrated using the recommended sound calibrator (see
Chapter 3.2).
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. The SV 18A microphone preamplifier
has a specially designed matching plug with a locking screw
to secure the preamplifier to the meter body. After plugging in
the preamplifier to the measurement input, the screw should
be tightened to light resistance only. Do not over tighten this
connector. It isnot necessaryto remove this preamplifier from
the top of the instrument unless the meter is in a calibration
laboratory as it is always used close coupled to the meter
body. The full description of the signals connected to the
sockets is given in Appendix C.
Bottom cover of the instrument
In the bottom cover, there is only one socket –USB (C type).
The USB-C Device 2.0 interface is the serial interface working with 12 MHz clock in the full speed mode
and with 480 MHz in the high-speed mode, which is a default mode of the instrument. The USB-C socket
is described in detail in Appendix C.
Note: Switch the power off before connecting the instrument to any other device (e.g. a printer
or a Personal Computer) or fitting the microphone capsule.
There is amemorymicro SD-cardslot underthe bottomcover
of the instrument and spaces for the 4 x AAA batteries.
You can accessthe cardand batteriesby unscrewing the coin
slot screw and removing the bottom cover –see
Chapter 16.1.
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.

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2.3 INSTRUMENT POWER
SV 971A can be powered by one of the following sources:
•Four AAA standard size batteries fitted internally. In the 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 alkaline cells, four AAA
rechargeable batteries can be used (a separate external charger is required for charging them). In
this case, using the best NiMH type, the operation time can be increased up to 16 h (4.8 V / 2.6 Ah)
•USB-C interface –100 mA HUB.
When the instrument is powered from internal batteries, the “battery” icon is presented on the top line
of the display.
The battery condition can be checked through the Battery screen. It is also presented continuously on
the top line of the display by means of the number of bars in the “battery” icon.
When voltage of the batteries is too low for reliable measurements, the icon is red and during attempt to
switch the instrument on, the Low Battery! message occurs on the display for 2 seconds and the
instrument switches off by itself.
Powering the instrument from the USB interface is performed by
connecting its USB socket to the PC or other USB power source via the
SC 158 cable.
When the USB is connected, the instrument automatically switches
powering from the internal batteries to the USB powering. After
disconnection the USB, the instrument will automatically switch power
to the internal batteries.
Note: When the instrument is powered via USB, the internal batteries slightly discharge. You
should remember about this effect and remove the battery if discharging is undesirable.
Note: Use only high-quality USB-C cables, such as SC 158. Many poor-quality cables do not
ensure low resistance of the cable, thus disabling proper operating of the instrument.
When there is a connection to the USB interface (USB Device socket is connected by the SC 158 cable
to a PC), the “USB” icon is presented on the top of the display and the Battery screen displays the
source voltage.
Note: In case the “battery” icon is red, it is strongly recommended to use USB interface as
soon as possible to ensure reliable operation. If no suitable external power source is provided
the instrument will be switched off automatically after a short time!
Prolonging the internal source of the instrument’s power can be achieved by means of the LCD screen
Dim Mode. You can configure the power saver function (Dim Mode) in the Screen Set. screen (path:
<Menu> / Display / Screen Set.).

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2.4 CONTROL KEYS ON THE FRONT PANEL
The instrument is controlled in a fully interactive way using the control keys and the configuration menu.
The following control keys are located on the front panel of the
instrument:
•<ESC>, (<P/S>)
•<Enter>,(<Menu>)
•▲,◄, ►, ▼
•<Shift>
•<Start/Stop>
The action given in (...) brackets denotes thesecond key function
which is available after pressing it in conjunction (or in sequence)
with the <Shift> key.
<Shift>
The second function of a key (<P/S>, <Menu>) can be used when the <Shift> key is
pressed with <Enter>, <ESC> or some other keys. This key can be used in two different
modes, which can be configured in the Keyboard list (path: <Menu> / Instrument /
Keyboard):
•like in a computer keyboard, when both <Shift> and the second key must be
pressed simultaneously (Direct mode);
•like in a smartphone keyboard, when the first <Shift> key should be pressed
and released and then the second key pressed (2nd Function mode).
Note: Simultaneous pressing of the <Shift> and <Start/Stop> keys turning the instrument on
or off.
<Start/Stop>
This key allows you to start and stop a measurement process.
<Enter>
This key opens the selected position in the menu and confirms selected settings. In the
Measurement mode, it switches sub-views. Some additional functions of this key will be
described in the following chapters of this manual.
<ESC>
This key closes lists of parameters or other screens and return to the upper list of the
menu. It acts in an opposite way to the <Enter> key. When a list of parameters is closed
after pressing the <ESC> key, any changes of settings just made are ignored. In the
Measurement mode, it switches views of results presentation.
◄/ ►
These keys allow you, in particular, to:
•change viewed result in the measurement mode,
•select column in a multi-column parameter list,
•select a parameter value in an active position (e.g. filter Z, A, Cetc., Start Delay
period: 1s, 2s, 3s, … etc.). In case of numerical values, it speeds up selection after
pressing and holding,
•control cursor in the graph views (Logger, Spectrum etc.),
•select position of a character in the text editor screen.
(◄ /►)
These ◄/ ►keys used in conjunction with <Shift> allow you, in particular, to:
•select parameter value in an active position (e.g. filter Z, A, C;integration period: 1s,
2s, 3s, … etc.),
•shift cursor from the first to the last position and back in the graph view.
▲/ ▼
These keys allow you, in particular, to:
•select position in the list,
•select character in the text editor screen,
•change profile in the measurement mode.

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(▲ / ▼)
These ▲/ ▼ keys used in conjunction with <Shift> allow you, in particular, to:
•change view in the measurement mode,
•change relationship between Y-axis and X-axis in the Logger and Spectrum views,
•program the Real Time Clock (RTC) and delayed run Timer.
(<Menu>)
This key (<Shift> + <Enter>) opens the main Menu in the configuration mode. Double
press of the <Menu> key opens the list containing last opened configuration screens. It
gives faster access to the frequently used screens for easy navigation.
(<P/S>)
This key (<Shift> + <ESC>) allows you to pause or break the measurement process
temporarily. If there is no current running measurement in progress this key opens the
Setup Manager menu.
<REC>
The simultaneously pressing the ◄and ►keys initiates recording of a voice signal as
a comment (see Chapter 8.3).
2.5 WORKING WITH THE INSTRUMENT
The instrument is controlled by means of eight keys on the keypad. Using these keys, one can access
all available functions and change the value of all available parameters.
The instrument is equipped with the super contrast OLED colour display (96 x 96 pixels), which displays
the measurement results and the configuration menu.
The instrument has two general modes of operation: measurement performance / results preview mode
and configuration mode with the use of menu functionality.
Turning on the instrument
To switch the power on, press the <Shift> and
<Start/Stop> keys simultaneously. The instrument goes
through the self-test routine (during this time the
manufacturer's logo and the name of the instrument is
displayed) and then it enters the Running SPL view
mode, if it was enabled, if not - to the One profile view.
2.5.1 Measurement mode
The measurement results can be viewed in different views or display modes, the set of which depend on
the selected Measurement Function, which you can change with the <ESC> key or the ▲/ ▼ keys
pressed together with <Shift>.
Measurement views
Views present some measurement results as well as additional information by
means of icons regarding:
- instrument status: memory, power, real time, etc.;
- measurement status: measurement elapsed time, measurement start/stop/
pause, trigger, logger etc.;
- measurement parameters: measured result, profile number, file name,
detector type, filter etc.
Some views are always available, and some can be
activated or deactivated usingthe Configuration mode.
Some views present numerical and some graphical
results, like on the right-handexample: time-historyplot
and spectrum.

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In some views you can toggle sub-views by pressing
the <Enter> key.
<ENT>
All icons are described in Chapter 2.7, other fields and view control functions - in Chapter 5.
Starting measurements
To starta measurement, press the<Start> key. The
icon will appear, and themeasurement will beperformed
with the current instrument settings, which are stored in
the instrument’s internal memory. During the
measurement the shape of the icon will be changing
from self to contoured.
<Start>
The time passed from the measurement start (elapsed time) is displayed in the
right lower corner of themeasurement screen in theformat ⌛mm:ss intherange
from 00:00 to 59:59, or in the format ⌛hh:mm:ss in the range from 01:00:00 to
99:59:59, or in the format ⌛xxxh from 100h to 999h, and ⌛>999h if the elapsed
time exceeds 999 hours. Its maximum value is equal to the Integration Period
and the elapsed time is zeroed when the new measurement cycle starts (see
Chapter 4.1).
Pausing measurement
To pause a measurement, press the<Shift> and <ESC>
key together. The measurement will be paused and the
icon will appear together with the Pause screen.
<Sh+ESC>
The Pause mode allows you to erase up to 30 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 some event that should not
normally occur.
To continue the measurement, press <Enter>.
◄ ..◄
2.5.2 Configuration mode
To configure a measurement or the instrument, use the menu, which is switched with the <Menu> key.
The menu consists of different type of screens, which include main menu, sections, lists of options, lists
of parameters, text editor screens, information screens etc.
User interface mode
The user interface may be presented in three modes:
Start/Stop, Simple or Advanced. These modes can
beselectedintheUser Inter. screenof theInstrument
section. The Simple mode enables basic instrument
settings, while the Advanced mode enables full scope
of available settings. Many screens can therefore have
different view depending on the selected operational
mode.
<ENT>