Svantek SVAN 958A User manual

USER MANUAL
SVAN 958A
FOUR CHANNELS
SOUND & VIBRATION
LEVEL METER &
ANALYSER
Warsaw, 2023-03-03
Rev. 1.02
Copyright © 2023 SVANTEK.
All rights reserved.

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SVAN 958A User Manual
Note: Because of continuous product improvement SVANTEK reserves the right to make changes to
product specifications without notice. To download the most up to date User Manual please visit our website
at www.svantek.com. This User Manual presents the firmware revision Ver. 4.01.x for Level Meter and Ver.
4.16.x for Analyzer (cf. the description of the Unit Label position of the Display list).
The succeeding software revisions (marked with the higher numbers) can change the view of some screens
presented in the text of this 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 © 2023 Svantek Sp. z o.o.
All rights reserved.
Reproduction without permission is prohibited.
Trademarks
Trademarks or registered marks in this manual belong to their respective manufacturers.
Microsoft and Windows are registered trademarks of Microsoft Corporation.
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: [email protected].pl

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SVAN 958A User Manual
CONTENTS
1INTRODUCTION 9
1.1 SVAN 958A as Sound Level Meter & Analyser 10
1.2 SVAN 958A as Vibration Meter & Analyser 10
1.3 General features of SVAN 958A 11
1.4 Accessories included 11
1.5 Accessories available 11
1.6 Available firmware 12
1.7 Firmware options 12
2GENERAL INFORMATION 13
2.1 Input and output sockets of the instrument 13
2.2 Powering of the instrument 15
2.3 Control keys on the front panel 16
2.4 Working with the instrument 19
2.4.1 Measurement mode 19
2.4.2 Configuration mode 20
2.5 Default settings 23
2.6 Description of icons 23
2.7 Memory organisation 25
3FUNCTIONS OF THE INSTRUMENT –Function 27
3.1 Measurement functions of the instrument –Measurement Function 27
3.2 Activation of optional functions 28
3.3 Instrument’s calibration – Calibration 28
3.3.1 Calibration of the instrument channels –Channel x 28
3.3.2 Calibration by setting transducer's sensitivity –By Sensitivity 29
3.3.3 Calibration by measurement –By Measurement 29
3.3.4 History of the calibrations –Calibration History 30
4MEASUREMENT PARAMETERS SETTING –Input 32
4.1 Selection of measurement parameters - Measurement Setup 33
4.2 Setting parameters for channels –Channels Setup 35
4.3 Setting the data logging functionality –Logger Setup 36
4.4 Setting parameters of auxiliary functions –Auxiliary Setup 38
4.4.1 Setting the RPM measurement –RPM Setup 38
4.4.2 Setting the parameters of attenuation measurements –“SEAT” Setup 39
4.4.3 Settings for vector calculations –Vector Setup 39
4.4.4 Setting the parameters for dose measurements –HAV/WBV Dose Setup 39
4.5 Triggering mode and parameters selection –Trigger Setup 41
4.5.1 Measurement trigger setup –Measure Trigger 41

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4.5.2 Logger trigger setup –Logger Trigger 42
4.5.3 Alarm trigger setting –Alarm Trigger 43
4.5.4 Alarm on SMS trigger setting –Alarm SMS Notification 44
4.5.5 Alarm on e-mail trigger setting –Alarm E-mail Notification 44
4.5.6 Definition of triggering conditions for logger and alarms –Trigger Events Setup 44
5DATA AVAILABLE ON THE DISPLAY –Display 47
6.1 Selection of the modes of measurement results presentation –Display Modes 47
6.2 Setting the parameters of graphical presentations –Display Setup 51
6.3 Checking the instrument powering –Power Supply 52
6.4 Setting the display brightness and power saver –Screen Setup 52
6.5 Checking the modem status –Modem Status 53
6.6 Checking the specification of the instrument –Unit Label 53
6SAVING THE MEASUREMENT RESULTS –File 54
7.1 Saving files in the instrument’s memory or external memory 55
7.2 Controlling data storing in the instrument’s memory – Save Options 56
7.3 Loading files with the measurement results –Load File 58
7.4 Checking the contents of the loaded file –Logger View 58
7.5 Removing file with the measurement results –Delete 59
7.6 Removing all files with measurement results from memory –Delete All 59
7.7 Merging result and setup files memory –Defragmentation 60
7.8 Checking the contents of the memory –Catalogue 60
7.9 Checking the free space in the memory –Free Space 60
7.10 Saving setup in the instrument’s memory – Save Setup 61
7.11 Options for setup files –Setup Options 61
7.12 Loading the files with the configuration –Load Setup 61
7.13 Checking the contents of the USB memory disk –USB Directory 61
7ADDITIONAL SETTINGS –Setup 63
7.1 Setting the language of the user interface –Language 64
7.2 Return to the factory settings –Clear Setup 64
7.3 Automatic measurement start –Auto Start 64
7.4 Day time limits selection –Day Time Limits 64
7.5 Selection of the extended mode –Ext. I/O Setup 65
7.6 Turning off instrument due to low external voltage –Ext. Power Setup 66
7.7 Programming keyboard –Keyboard Setup 66
7.8 Locking the menu –Menu Lock 67
7.9 Reference signal in vibration measurements –Reference Levels 67
7.10 Activating the remote control error confirmation –Remote Control Setup 67

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7.11 Selection of detector’s type in the LEQ (RMS) calculations – RMS Integration 67
7.12 Setting the parameters of the serial interface –RS232 Setup 68
7.13 Programming the instrument’s internal Real Time Clock – RTC 68
7.14 Selection of statistics levels to be saved in a file –Statistical Levels 69
7.15 Programming the instrument’s internal timer – Timer 69
7.16 Programming the instrument’s socket named USB Host –USB Host Setup 70
7.17 Setting user filter coefficients for 1/1 Octave and 1/3 Octave analysis –User Filters 71
7.18 Selection of the Vibration units –Vibration Units 71
7.19 Warnings selection –Warnings 72
7.20 Parameters of remote communication –Wireless Communication 72
7.20.1Selection of the network type –Network Setup 73
7.20.2Configuration of modem basic settings –Modem Setup 73
7.20.3Setting of support modem options –Modem Connection 74
7.20.4Configuration of SMS service –SMS Option 75
7.20.5Configuration of e-mail service –E-mail Settings 75
8CALCULATION OF DOSE PARAMETERS –Auxiliary Functions 77
8.1 Calculation of hand-arm or whole-body vibration dose 77
9PRINTING REPORTS –Report 79
9.1 Edit the user title of the report –Title 80
9.2 Printing the measurement results –Print Results 80
9.3 Selection the printing options –Print Options 81
10 1/1 AND 1/3 OCTAVE ANALYSER 82
10.1 Selecting 1/1 Octave or 1/3 Octave analysis function 82
10.2 Configuring 1/1- or 1/3-octave analyser 82
10.3 Selection of 1/1 Octave and 1/3 Octave bandpass results as triggering source 83
10.4 Display options in 1/1 Octave and 1/3 Octave analysis mode 85
10.5 Presentation of 1/1 Octave and 1/3 Octave analysis results 85
10.6 Setting the scale of the spectrum results presentation –Display Scale 86
10.7 Setting parameters of the spectrum presentation –Spectrum View 87
10.8 Setting parameters for total values –Total Values 87
10.9 Setting user filter coefficients for 1/1 and 1/3 Octave –User Filters Setup 88
11 DOSIMETER 90
11.1 Selecting Dosimeter function 90
11.2 Selecting dosimeter parameters –Dosimeter Setup 90
12 FFT ANALYSER 92
12.1 Selecting FFT analysis mode 92
12.2 Selecting FFT analysis parameters –FFT Setup 92

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12.3 Display options in FFT analysis mode 94
12.4 Presentation of FFT analysis results 94
12.5 Setting the scale of the spectrum results presentation –Display Scale 95
12.6 Setting parameters of the spectrum presentation –Spectrum View 95
13 CROSS-SPECTRUM 96
13.1 Selecting Cross Spectrum function 96
13.2 Selecting channels for cross-spectrum analysis –Cross Spectrum Setup 96
14 SOUND INTENSITY 98
14.1 Selection of Sound Intensity function 98
14.2 Selection of parameters for sound intensity analysis –Intensity Setup 98
15 REVERBERATION TIME 99
15.1 Selecting RT60 function 99
15.2 Setting RT 60 parameters 99
15.3 Configuring results view 102
15.4 Starting RT60 measurement 102
15.5 Visualization of the RT 60 measurements results 103
16 WAVE RECORDER 106
16.1 Selecting Wave Recorder function 106
16.2 Configuring wave recording parameters –Wave Parameters 106
Appendix A. REMOTE CONTROL (v4.16.2) 107
A.1. Input / output transmission types 107
A.2. Function #1 –input / output of the control setting codes 107
A.3. Function #2 –read-out of the measurement results in the SLM or VLM mode 109
A.4. Function #3 –read-out of the measurement results in 1/1 OCTAVE and 1/3 OCTAVE mode 112
A.5. Function #4 –read-out of the data file from the internal flash-disc and/or the special file located
in the RAM memory 113
A.6. Function #5 –read-out of the statistical analysis results 115
A.7. Function #6 –remote setting of the user filters 116
A.8. Function #7 –special control functions 118
A.9. Function #9 –writing setup files to the internal flash-disc 122
A.10. Control setting codes 123
Appendix B. DATA FILE STRUCTURES (v4.16) 139
B.1. Structure of the SVAN 958A file 139
B.2. Structure of the block with meteorological data 168
B.3. Structure of the file with the results from Level Meter and Wave Recorder Modes 169
B.4 Structure of the file with 1/1 OCTAVE analysis results 170

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B.5. Structure of the file with 1/3 OCTAVE analysis results 170
B.6. Structure of the file with FFT analysis results 171
B.7. Structure of the file containing LM results from logger’s file 172
B.8. Structure of the file containing 1/1 or 1/3 OCTAVE analysis results from logger’s file 172
B.9. Structure of the file containing FFT analysis results from logger’s file 172
B.10. Structure of the file containing saved instrument’s setup 173
B.11. Structure of the file containing results from RT60 function 173
B.12. Structure of the file containing averaged RT60 measurement results 173
B.13. Structure of the logger file containing time-domain signal 174
B.14. Structure of the file with the results of FFT cross-spectrum analysis 174
B.15. Structure of the file with the results of Sound Intensity analysis 174
B.16. Contents of the file in the logger 175
B.16.1. Record with the results 175
B.16.2. Record with the state of the markers 180
B.16.3. Record with the breaks in the results registration 181
B.16.4. Record with the breaks account PAUSE in the results registration 181
B.17. Contents of the files in the logger containing time-domain signal 181
B.17.1. Samples record 181
B.18. Date and time 182
Appendix C. SVAN 958A TECHNICAL SPECIFICATIONS 183
C.1. Specification of SVAN 958A as Sound Level Meter (SLM) 183
C.1.1 Specification of SVAN 958A as SLM in the standard configuration 183
C.1.2 Effect of Vibration 192
C.1.3. Effect of the SA 277C outdoor microphone kit (Channel 4 only) 193
C.1.4. Effect of the SA 277D outdoor microphone kit (Channel 4 only) 193
C.2. Specification of SVAN 958A as Vibration Level Meter (VLM) 194
C.3. Specification of SVAN 958A as 1/1, 1/3 octave and FFT analyser 202
C.3.1. Specification of SVAN 958A as 1/1 octave, 1/3 octave and FFT analyser in the standard
configuration for sound inputs 202
C.3.2 Specification of SVAN 958A as 1/1, 1/3 octave and FFT analyser in the standard
configuration for vibration inputs 205
C.3.3 1/1 and 1/3 octave filters characteristics 206
C.3.4. Digital HP filter implemented in 1/1 & 1/3 OCTAVE and FFT analysis 209
C.3.5. FFT analysis specification 209
C.4. Frequency characteristics of implemented broadband digital filters 213
C.4.1. Digital weighting filters dedicated for sound input 213
C.4.2 Digital weighting filters dedicated for vibration inputs 215
C.5. Miscellaneous specification of SVAN 958A 224
C.6. Specification of the accelerometers 231
C.7. Using the SA 277C outdoor microphone kit (Channel 4) 236

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C.8. Using the SA 277D outdoor microphone kit (Channel 4) 261
Appendix D. DEFINITIONS AND FORMULAE OF MEASURED VALUES 291
D.1. Sound Level Meter 291
D.1.1 Basic terms and definitions (SLM mode) 291
D.1.2 Definitions and formulas of the results (SLM mode) 292
D.1.3 Definitions and formulas of the additional Dosimeter function results 295
D.2. Vibration Level Meter 296
D.2.1 Basic terms and definitions (VLM mode) 296
D.2.2 Definitions and formulas of the results (VLM mode) 297
D.2.3 Definitions of the Hand-Arm vibration results available in the vibration mode 297
D.2.4 Definitions of the Whole-Body vibration results available in the vibration mode 298
D.4. Statistical levels –LN% definition 299
APPENDIX E. REVERBERATION TIME CALCULATIONS 301
E.1. Introduction 301
E.2. RT 60 reverberation time definition and calculation 302
E.3. Description of the decay curve recording in different measurement methods 304

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SVAN 958A User Manual
1 INTRODUCTION
SVAN 958A Class 1 Four-channel Sound & Vibration
Analyser is dedicated for all applications that require
simultaneous class 1 sound and vibration assessment.
Each of four input channels can be independently
configured for sound or vibration detection with
different filters and RMS detector time constants giving
users an enormous measurement flexibility. The real
advantage of SVAN 958A is the capability to perform
advanced analysis simultaneously to the level meter
mode. In practise this allows the user to obtain broad-
band results such as Leq, RMS, LMax, LMin, LPeak
together with four-channel analysis like FFT or octave
band analysis.
SVAN 958A as sound meter meets IEC 61672-1:2013
and as vibration meter meets ISO 8041-1:2017. All
required weighting filters, transducers and adapters for
triaxial Whole-Body and triaxial Hand-Arm vibration
measurements (VM) are available with this instrument.
Additionally, in case of sound measurements (SM), each channel calculates simultaneously the results in three
independent profiles.
Advanced time-history logging, provides very powerful measurement capability. The external USB Memory
Stick extends this facility almost unlimitedly. Results can be easy downloaded to any PC using standard USB
(or optional RS 232 and IrDA) interface and SvanPC software.
Reverberation Time measurements, noise dosimeter and rotation speed measurements are available as
options for the SVAN 958A instrument.
The time-domain signal recording on the external USB memory stick is also available as an exceptional option.
Fast USB 1.1 interface (12 MHz) creates real time link for the PC "front-end" application of SVAN 958A. The
measurement results can be downloaded to PC using the above mentioned interfaces.
The instrument is powered by four AA standard alkaline or rechargeable batteries (i.e. NiMH –separate charger
is required). Powering the instrument from the external DC power source or the USB interface
is also possible. Robust and lightweight design accomplishes the exceptional features of this new generation
instrument.
The Whole-Body vibration measurement is now even easier thanks to the SV 38 seat-accelerometer which can
be placed directly on the seat-cushion, on the floor or fixed to the back of the seat.
The SV 50 set with triaxial accelerometer enables Hand-Arm vibration measurements regardless of the type of
evaluated tool.
Additionally, for measurements of very high impulse vibration the special adapter SA 55, with low pass
mechanical filter protecting accelerometer from DC shift effect is available. Evaluation of the grip force will be
possible with the dedicated “integrated adapter” SV 105 (under development).

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SVAN 958A User Manual
1.1 SVAN 958A AS SOUND LEVEL METER &ANALYSER
•Noise measurements (SPL, LEQ, SEL, Lden, Ltm3, Ltm5 and statistics) with Class 1 accuracy (IEC 61672-
1:2013) in the frequency range 10 Hz ÷ 20 kHz (with the SV 22 microphone)
•Two measurement ranges (Low and High) with total range 24 dBA RMS ÷ 194 dBA Peak (for the
microphone with the sensitivity 50 mV/Pa)
•Internal noise level: less than 17 dBA RMS
•Simultaneous measurements in three profiles of any channel with the independent set of IMPULSE, FAST
and SLOW detectors with standard A, C, LIN and Gfilters
•Digital True RMS detector with Peak detection, resolution 0.1 dB, Time Constants: SLOW, FAST,
IMPULSE
•1/1 Octave and 1/3 Octave real time analysis (optional) - fifteen 1/1-octave filters with the centre
frequencies from 1 Hz to 16 kHz and forty-five 1/3-octave filters with the centre frequencies from 0.8 Hz to
20 kHz, Class 1 - IEC 1260
•FFT real time analysis with up to 1920 lines in 22.4 kHz band with Hanning, Rectangle, Kaiser-Bessel or
Flat Top window (optional)
•Reverberation Time analysis (RT 60) in 1/3 octave bands (optional)
•Dosimeter function (optional)
•Cross Spectrum function (optional)
•Sound Intensity function (optional)
•Wave recorder function (optional)
1.2 SVAN 958A AS VIBRATION METER &ANALYSER
•Vibration measurements according to ISO 2631-1, 2 & 5 and ISO 5349-1 & 2 with Class 1 accuracy
(ISO 8041-1:2017) in the frequency range 0.5 Hz÷3 kHz (with SV 39A/L accelerometer) or 2 Hz÷ 10 kHz
(with SV 3023 M2 accelerometer)
•Two measurement ranges (Low and High) with total range 0.003 ms-2 RMS ÷ 500 ms-2 Peak (for the
accelerometer with the sensitivity 100 mV/g)
•Simultaneous RMS, VDV, MTVV or MAX, PEAK, P–Pmeasurements in four channels with independent set
of filters and detector constants
•Digital True RMS & RMQ detectors with Peak detection, resolution 0.1 dB, Time Constants:
from 100 ms to 10 s
•Wd, Wk, Wc, Wj,Wm, Wb, Wg(ISO 2631), Wh(ISO 5439), HP1, HP3, HP10, Vel1, Vel3, Vel10, VelMF, Dil1,
Dil3, Dil10, KB weighting filters
•1/1 Octave and 1/3 Octave real time analysis (optional) - fifteen 1/1-octave filters with the centre
frequencies from 1 Hz to 16 kHz and forty-five 1/3-octave filters with the centre frequencies from 0.8 Hz to
20 kHz, Class 1 - IEC 1260
•FFT real time analysis with up to 1920 lines in 22.4 kHz band with Hanning, Rectangle, Kaiser-Bessel or
Flat Top window (optional)
•RPM rotation speed measurements parallel to the vibration measurement (1 ÷ 99999) (option)
•Wave recorder function (optional)
•Ground Vibrations function (optional)
•Cross Spectrum function (optional).

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1.3 GENERAL FEATURES OF SVAN 958A
•Internal logger function for logging more than two weeks of 1-second PEAK / MAX / MIN / RMS results in
the case of SM and PEAK / P–P / MAX (or MTVV)/ RMS / VDV results in the case of VM (32 MB of non-
volatile memory, optional USB memory stick)
•USB 1.1 Client, USB Host, RS 232 (option, SV 55 required) and IrDA (option) interfaces
•Powered by four AA standard batteries (operation time >10 hours) or four AA rechargeable batteries
(e.g. NiMH - operation time > 16 hours), SA 17A external battery pack (operation time > 14 hours), external
DC power source (6 V ÷ 15 V) or USB interface (500 mA)
•Acoustic dosimeter function (option)
•Integration time programmable up to 24 hours
•Time-domain signal recording on USB memory stick (option)
•Handheld and robust case
•Light weight (only 510 grams including batteries)
1.4 ACCESSORIES INCLUDED
•SC 16 USB 1.1 cable
•SC 61 integrated connector (TNC to BNC)
•batteries four AA standard (alkaline)
1.5 ACCESSORIES AVAILABLE
•MK 255 Microtech Gefell prepolarised condenser microphone cartridge 1/2' (stainless steel
microphone), 50 mV/Pa
•SV 12L microphone preamplifier
•SC 26 extension cable for the microphone preamplifier (3 m or 10 m)
•SC 27 TNC (plug) to TNC (plug) coil cable
•SC 49 LEMO 4-pins to 3 x TNC sockets (0.7 m)
•SA 06 microphone preamplifier holder
•SA 21 tripod 1.5 meter high
•SA 22 windscreen
•SV 25 dosimeter ceramic ½” microphone with integrated preamplifier (Class 2)
•SV 36 Class 1 Sound calibrator: 94/114 dB @ 1000 Hz
•SC 49 LEMO 4-pins (plug) to 3 x TNC sockets (0.7 m)
•SV 38 Whole-Body Seat accelerometer for SVAN 958A instrument
•3143M1 DYTRAN IEPE type triaxial accelerometer with the nominal sensitivity 100 mV/g
(SC 38 cable required)
•3023M2 DYTRAN IEPE type triaxial accelerometer with the nominal sensitivity 10 mV/g
(SC 38 cable required)
•SC 38 4-pins Microtech to LEMO 4-pins cable (2.7m) (for 3023M2, 3143M1)
•SV 111 vibration calibrator for HVM

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SVAN 958A User Manual
•SV 110 vibration calibrator
•SC 50Z car cigarette plug to external power supply plug
•SC 39P LEMO 4-pins (plug) to 3 x BNC sockets cable (0.7 m)
•SV 50 set for Hand-Arm measurements (3023M2 accelerometer)
•SV 55 RS 232 interface
•SA 17A external battery unit
•SA 15 power supply unit
•SC 09A AC output (Lemo 1 to BNC) cable
•SA 47 carrying bag (fabric material)
•SA 48 carrying case (waterproof)
1.6 AVAILABLE FIRMWARE
SVAN 958A can be supplied with one of the below firmware options. The user can download the new firmware
from the SVANTEK web-site and install it to the instrument.
•SVAN 958A Firmware (supporting RT 60, Crosspectra, Intensity, not supporting modem)
This firmware option is recommended for other than Building or Ground Vibration measurements or if you
don’t use the SV 258 PRO monitoring station.
•SVAN 958A Firmware (supporting modem, not supporting RT 60, Crosspectra, Intensity)
This firmware option is recommended for other than Building or Ground Vibration measurements but when you
use the SV 258 PRO monitoring station.
•SVAN 958AG Building Vibration Firmware for SVAN 958A
This firmware option is recommended for Building or Ground Vibration measurements with or without using the
SV 258AG PRO monitoring station. This firmware option is described in the SV 258AG PRO User Manual.
1.7 FIRMWARE OPTIONS
•SVAN 958A_1 SVAN 958A including 1/1 & 1/3 octave analysis, FFT and Time domain signal recording
•SV 958A_1 1/1 octave analysis option
•SV 958A_2 1/3 octave analysis option
•SV 958A_3 1/1 & 1/3 octave analysis option
•SV 958A_4 FFT analysis option
•SV 958A_5 Reverberation time analysis (RT60) option
•SV 958A_8 Rotation measurement option without Laser Tachometer
•SV 958A_10 Acoustic dosimeter option (microphone not included)
•SV 958A_15 Time domain signal recording option (to the USB Flash Disk, wav format)
•SV 958A_17 Sound Intensity option, FFT base (Probe not included)
•SV 958A_19 Cross-spectra option
Note: The firmware options for the instrument can be purchased at any time as only the introduction
of a special unlock code is required for their activation in a specific instrument. Contact your local
Svantek distributor for further information and costs for these options.

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2 GENERAL INFORMATION
2.1 INPUT AND OUTPUT SOCKETS OF THE INSTRUMENT
Top cover of the instrument
The measurement inputs are placed on the top cover of
the instrument: 4-pins Lemo compatible socket type
ENB.0B.304 for Channels 1–3and TNC for Channel 4,
all with IEPE power supply for the accelerometers or
microphone preamplifiers.
The microphone preamplifier SV 12L has the proper plug-in with the screw for direct connection with the
instrument to the TNC connector (Channel 4) but it is recommended to use the preamplifier
with any of the extension cables (i.e. SC 26) or the SA 08 gooseneck. The same type of the connector should
be used to attach one-channel accelerometer to Channel 4. The SC 27 coiled cable
is recommended in this case. In order to connect the SV 12L microphone preamplifier to Channels 1–3the
user has to use the SC 49 cable (LEMO 4-pins plug to 3 * TNC sockets, 0.7 meters long). The SC 49
or SC 39P (LEMO 4-pins plug to 3 * BNC sockets, 0.7 meters long) cables should be used to connect one-
channel accelerometer to any of the Channels 1–3. The triaxial accelerometers can be easy connected to
Channels 1–3by means of the SC 38 cable (4-pins Microtech to LEMO 4-pins, 2.7 meters long). It is
recommended to attach the SV 25 dosimeter microphone with the integrated preamplifier
and a cable to Channel 4.
The full description of the signals connected to the sockets is given in the Appendix C.
Note: Pay attention that the TNC connector should be always twisted to the light resistance but the
LEMO connector is a push-pull only.
Bottom cover of the instrument
In the bottom cover there are four sockets, placed from
the right to the left as follows: Ext. Pow., USB Host,
USB Device and I/O.
The USB 1.1 Client interface (the USB Device socket) is the serial interface working with 12 MHz clock. Thanks
to its speed, this interface is widely used in all PCs. In the instrument, the standard 4-pins socket is used
described in details in Appendix C.
The USB Host 1.1 interface can be used to connect the external storage, enabling the device
to register virtually infinite sequence of measurement results.
The Ext. Pow. socket located on the bottom cover of the instrument is Marushin MJ-14 compatible socket,
dedicated for the standard Φ5.5 / 2.1 mm plug (the right one in the Fig. above). The user can connect the
external mains adapter (110 V / 230 V) which furnishes the proper DC level. The instrument can be charged
from the external DC source (6 V / 500 mA DC ÷ 15 V / 250 mA DC). The current consumption depends on the
voltage of the power supplier.
The additional input / output socket, called I/O, is 1-pin LEMO compatible socket type ERN.00.250 (the left one
in the Fig. above). The function of this socket can be selected from menu (path: <Menu> / Setup /
EXT. I/O Setup / Mode). The socket can be used as:

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SVAN 958A User Manual
•analogue output with the signal from the input of the analogue / digital converter (before
the correction); this signal can be registered using magnetic recorder or observed on the oscilloscope (the
ANALOG setting)
•digital input for external interrupt (the DIGITAL IN setting)
•digital output for external trigger (the DIGITAL OUT setting)
Note: Switch the power off before connecting the instrument to any other device (e.g. a printer or a
Personal Computer).
Front panel of the SVAN 958A instrument
Rear panel of the SVAN 958A 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 the control keys
of the instrument has been reduced to nine for ease of use and convenience.

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2.2 POWERING OF THE INSTRUMENT
The SVAN 958A can be powered by one of the following sources:
•External DC power source, SA 15 –6 V DC ÷1 5 V DC (1.5 W)
•SA 17A external battery pack –operation time > 24 h (option)
•Four AA standard size internal batteries. 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 AA 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 interface –500 mA HUB
The Power Supply list (path: Menu / Display / Power Supply) looks differently, depending on the current
powering source.
In the Power Supply list of the Instrument list the user can see the information about the current power source.
When the instrument is powered from its internal batteries, the “Battery” icon is presented on the top line of
the display. When voltage of the batteries is too low for reliable measurements, the icon flashes and the
instrument is trying to finish the measurement during 2 seconds, then within 5 seconds the Low power
message occurs on the display and the instrument switches off by itself.
To change the batteries the user has to switch off the instrument, take off the black bottom cover of the
instrument, unscrew battery cover, slide the battery tubes out, change the batteries taking care to observe the
correct polarity and reassemble the parts of the instrument. Fully charged set of 4 batteries ensure more than
12 hours of continuous operation of the instrument (with the backlight off). The operation time is decreased
about 20 % with the backlight switched on. The battery condition can be checked by means of the
Power Supply function. It is also presented continuously on the top line of display by means of the “Battery”
icon.
When there is a connection to the USB interface (USB Device socket is connected by means of the cable to a
PC or a USB power supply), the “Computer” icon is presented on the top of the display and in the
Power Supply list there is the message USB Power: 0.00V.
The external power (110 V / 230 V mains) adapter –SA 15 –is available for the instrument but it is not included
in the set. For the external power operation this adapter should be connected to the Power socket located on
the bottom cover of the instrument. When the instrument is powered from the external power supply the red
diode on the right corner of the front panel bottom of the device switches on and there is the
EXTERNAL POWER message in the Power Supply list (path: Menu / Display / Power Supply).
Note: In case when the “Battery” icon is flashing it is strongly recommended to use the external
power adapter or 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!

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2.3 CONTROL KEYS ON THE FRONT PANEL
The following control keys are located on the front panel
of the instrument:
•<ENTER>,(<Menu>),[<Save>],
•<ESC>, (<Cal.>),[<S/P>],
•<Shift>, [Markers]
•<Alt>, [Markers]
•▲,
•◄,
•►,
•▼,
•<Start/Stop>.
The name given in (...) brackets denotes the second key function which is available after pressing it in
conjunction (or in sequence) with the <Shift> key. For the first two keys the name given in square brackets […]
denotes also the third key function which is available after pressing it in conjunction (or in sequence) with the
<Alt> key.
<Shift>
The second function of a key (written in red colour on a key) can be used when the <Shift>
key is pressed. This key can be used in two different ways:
•as Shift like in a computer keyboard (e.g. while typing the filename); both <Shift> and
the second key must be pressed together (two finger operation);
•as 2nd Fun; this key can be pressed and released before pressing the second one or
pressed in parallel (while operating in “2nd Fun”mode, see the following notice) with
the second key (one finger operation).
The <Shift> key pressed in conjunction with <Alt> enables the user to enter the Markers on
the plots during the measurement.
<Alt>
This key enables the user to choose the third key function in case of [<Save>] and [<Pause>]
keys. In order to select the third function the user must press the <Alt> and the second key
simultaneously.
Note: Simultaneously pressing the <Alt> and <Start/Stop> keys switches the instrument on or off.
<Start/Stop>
This key enables the user to start the measurement process when the instrument is not
measuring or to stop it when the instrument is in course of the measurement. It is also possible
to set the mode of this key such that in order to start or stop the measurements the user has
to press it simultaneously with the <Shift> key.
Note: Changing the <Start/Stop> key mode is performed in the Keyboard Settings list of the
Instrument list (see description of the Instrument list).
<ENTER>
This key enables the user to enter the selected position shown on the screen Menu list or to
confirm selected settings. Some additional functions of this key will be described in the
following chapters of this manual.
(<Menu>)
This key (pressed together with <Shift>) enables the user to enter the main list containing six
sub-lists: Function, Input, Display, File, Setup, Auxiliary Functions and Report. Each of
the mentioned above menu lists consists of sub-lists, elements and data lists. These main sub-
lists will be described in detail in the following chapters of the manual. Double pressing the
<Menu> key enters the History list containing the last eight opened sub-lists. It often speeds

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SVAN 958A User Manual
up control of the instrument as the user has faster access to the most frequently used sub-lists
for easy navigation.
[<Save>]
This key (pressed together with <Alt>) enables the user to save measurement results as a file
in the instrument’s internal memory or on the USB memory stick.
<ESC>
This key closes the control lists, sub-lists or windows. It acts in an opposite manner to the
<ENTER> key. When the list is closed after pressing the <ESC> key, any changes made in it
are ignored in almost all cases.
([Cal.])
This key (pressed together with <Shift>) opens the Calibration sub-list.
[<Pause>]
This key enables one to break temporary the measurement process. The subsequent pressing
of the <Pause> key deletes the measurement result from the last one second. Up to fifteen
last seconds of the measurement can be cancelled in this way.
◄/ ►
These keys enable the user specifically to:
•select the parameter value in an active position (filter: LIN, Aor C,Integration period:
1s, 2s, 3s, … etc.);
•shift the cursor in Spectrum, Logger and Statistics modes of result’s presentation
•select the position of the character in the text editing mode (in the File Name menu);
•select the column in a multi column parameter list;
•change the content of the active field in the result presentation modes (channel, profile,
result function name etc.);
•activate markers 2 and 3;
•speed up changing the numerical values of the parameters when pressed and held.
(◄/ ►)
The ◄/ ► key pressed in conjunction (or in sequence) with <Shift> enable the user
specifically to:
•speed up the changing of the numerical values of the parameters (i.e. the step is
increased from 1 to 10 in the setting of Start Delay - path: Menu / Input /
Measurement Setup / Start Delay);
•to shift cursor from the first to the last position and back on the graphical presentation
mode.
[◄/ ►]
The ◄/ ► key pressed in conjunction (or in sequence) with <Alt> enable the user specifically
to:
•change the statistics class (the number displayed after the letter L) in one-channel and
multi-channel modes of result’s presentation;
•change the parameter value in a multi column parameter list;
•insert or delete a character in the text edition modes.
▲, ▼
The ▲/ ▼ key enable the user specifically to:
•select line in the menu list,
•select the proper character from the list in the text edition mode;
•programme the Real Time Clock (RTC);
•switch on/off markers 1 and 4.
(▲, ▼)
The ▲/ ▼ key pressed in conjunction (or in sequence) with <Shift> enable the user
specifically to:
•change the relationship between the Y-axis and X-axis of all plots presented on the
screen
•change the parameter values for the whole column in a multi column parameter list;
•shift the cursor from the first to the last position and back on the menu list;
•change the month in the current date setup screen.

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[▲, ▼]
The ▲/ ▼ key pressed in conjunction (or in sequence) with <Alt> enable the user specifically
to:
•change the mode of result presentation;
•change the year in the current date setup screen
[Markers]
The Markers enable the user to mark the special events, which occurred during the performed
measurements (i.e. the airplane flight, the dog’s barking, the train’s drive etc.). In order to enter
the markers the logger has to be switched on (path: Menu / Input / Logger Setup /
Logger Mode: On) and one or more logger options (PEAK, MAX, MIN, RMS in the case of
sound measurements and PEAK, P–P, MAX, RMS, VDV in the case of vibration
measurements) in channels have to be chosen (path: <Menu> / Input / Logger Setup /
Channel x).
In order to enter the marker mode the user must press <Shift> and <Alt>
keys simultaneously during the measurement. The marker overlay with four
available marker numbers appears on the screen. To choose marker number
1 the user must press ▲push button (number 2 - ◄, number - 3 ►and
number 4 - ▼).
The marker overlay closes automatically and chosen marker is activated
(after pressing <Shift> + <Alt> again active marker number will be
highlighted). In order to switch off the marker, the user has to activate the
marker overlay and press this key, which refers to the marker to be switched
off. Up to four markers can be switched on at the same time.
The current state of the markers is indicated in the logger file (cf. App. B for
details) and can be used to show them with the help of the dedicated
presentation software.
<Shift> / <Alt>
▲
An example presentation of the markers
on the time history plot is shown below
(to view a plot with markers the user has
to transfer data to the appropriate
software such as SvanPC++).
20
30
40
50
60
70
80
13:30:00 13:30:09 13:30:17 13:30:26 13:30:35 13:30:43 13:30:52
Leq
Marker 1
Marker 2
Marker 3
Marker 4

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2.4 WORKING WITH THE INSTRUMENT
The instrument is controlled by means of nine keys on the keypad. Using these keys, one can access all
available functions and change the value of all available parameters.
The instrument is equipped with the super contrast OLED colour display (320 x 240 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 instrument on
To turn the instrument on, press the <Alt> and <Start/Stop> keys at the same
time. The instrument goes through the self-test routine after turning on, displaying
during this time the manufacturer logo and the name of the instrument.
The instrument will warm up for one minute, then it enters one of the results view
mode (depending on which mode was used during the instrument’s switch off).
2.4.1 Measurement mode
The measurement results can be viewed in different view modes, the set of which depend on the selected
Measurement Function and which you can change and activate/deactivate.
Measurement results viewing
Measurement results can be presented in different views, so called display modes, some of which are always
available, and some can be activated or deactivated.
Display modes present some measurement results as well as additional
information in the way of icons regarding:
•instrument status: memory, power, real time, etc.;
•measurement status: measurement function, measurement elapsed time,
measurement start/stop/pause, trigger, logger etc.;
•measurement parameters: measured result, channel and profile number,
file name, detector type, filter etc.
All icons are described in Chapter 2.6, other fields and view control functions - in Chapter 5.
Numerical results can be presented in one,
two or four channels views.
Some views present results in graphical form,
like on the right-hand example: time-history
plot and spectrum.
You can switch between views using the
▲/ ▼ keys pressed together with <Alt> or
using soft-keys.

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Starting measurement
To start measurement, press the <Start> key.
The icon will appear, and the
measurement will be performed with the
current instrument settings, which are stored
in the instrument’s internal memory.
<Start>
The time passed from the measurement start (elapsed time) is displayed in the
right upper corner of the measurement screen in the format 󰑺󰑻󰑼󰑽mm:ss in the
range from 00:00 to 59:59. After this limit, the hours and minutes are shown (i.e.
00:59). 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).
Note: The real time clock is always displayed on the display in all measurement modes.
Pausing measurement
To pause a measurement, press the <S/P>
key (<Alt>+<ESC>). The measurement will
be paused and the icon will appear
together with the Pause section at the bottom
of the screen.
<S/Pt>
The Pause mode allows you to erase up to 10
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>.
◄..◄
2.4.2 Configuration mode
To configure a measurement or the instrument, use the menu mode, which is switched with the <Menu> key.
The menu consists of different type of screens, which include main menu, sub-menu, lists of options, lists of
parameters, text editor screens, information screens etc.
Main menu
The main Menu contains the headers of several sections (sub-menu), which
group configuration settings by feature. The main Menu is opened after pressing
the <Menu> (<Shift> +<ENTER>) key. The main Menu list contains the
following sections: Function, Input, Display, File, Setup and Auxiliary
Functions.