BRUEL & KJAER 9737 User manual

USER MANUAL
www.bksv.com ©Brüel & Kjær. All rights reserved.
Portable Impedance Meter System
Type 9737
BE 1839 – 13
English
ËBE-1839---PÎ BE 1839 – 13

BE 1839 – 13
December 2019 www.bksv.com
Portable Impedence Meter System
Type 9737
User Manual

Health and Safety Considerations
This apparatus has been designed and tested in accordance
with IEC/EN 61010 – 1 and ANSI/UL 61010 – 1
Safety
Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use
. This manual contains
information and warnings which must be followed to ensure
safe operation and to retain the apparatus in safe condition.
Safety Symbols and Signal Words Used
The apparatus will be marked with this symbol
when it is important that you refer to the
associated danger or warning statement given in
this manual
The manual uses this symbol when a danger or
warning statement is applicable
Hazardous Voltage/Electricity. Both the apparatus
and manual use this symbol when there is a risk for
shock or electrocution
Hot Surface. This manual will use this symbol when
there is a risk for burning or scolding
Earth (Ground) Terminal. The apparatus will be
marked with this symbol when applicable
Protective Conductor Terminal. The apparatus will
be marked with this symbol when applicable
Alternating Current. The apparatus will be marked
with this symbol when applicable
Danger Signals an imminent hazardous situation, which, if
not avoided, will result in death or serious injury
Warning Signals a possibly hazardous situation, which, if
not avoided, will result in death or serious injury
Caution Signals a hazardous situation, which, if not
avoided, could result in minor or moderate injury
or damage to the apparatus
Notice Signals a situation or practice that requires
attention, but does not directly result in personal
injury if ignored
Risks and Hazards
Explosion Hazards
Danger: The apparatus is not designed to be used
in potentially explosive environments. It should
not be operated in the presence of flammable
liquids or gases
Electrical Hazards
Warning: Any adjustment, maintenance and
repair of the open apparatus under voltage must
be avoided as far as possible and, if unavoidable,
must be carried out only by trained service
Caution: Switch off all power to equipment before
connecting or disconnecting their digital
interface. Failure to do so could damage the
equipment
Mechanical Hazards
Caution: Whenever it is likely that the correct function or
operating safety of the apparatus has been
impaired, it must be made inoperative and be
secured against unintended operation
Waste Handling
Brüel & Kjær complies with the EU’s Waste Electrical
and Electronic Equipment (WEEE) Directive, which issues
the following waste handling instructions:
• Do not dispose of electronic equipment or
batteries as unsorted municipal waste
• It is your responsibility to contribute to a clean
and healthy environment by using the
appropriate local return and collection systems
• Hazardous substances in electronic equipment or
batteries may have detrimental effects on the
environment and human health
• The symbol shown to the left indicates that
separate collection systems must be used for any
discarded equipment or batteries marked with
that symbol
• Waste electrical and electronic equipment or
batteries may be returned to your local
Brüel & Kjær representative or to Brüel & Kjær
Headquarters for disposal

Brüel & Kjær has made every effort to ensure the accuracy of
the information contained in this document. No responsibility
is accepted for any errors or omissions herein. It is the
responsibility of the user to ensure compliance with any legal
or statutory requirements in the country of use. Data may
change, as well as legislation, therefore you are advised to
obtain copies of the most recently issued applicable
regulations, standards and guidelines.
All descriptions, illustrations and any other information relating
to the product are made by way of general description, are
approximate only and for the general guidance and information
of the user. They cannot be construed to imply representation or
warranty as to their accuracy, currency or completeness and are
not intended to form the basis of any contract.
The information in this document does not constitute a
warranty, representation or guarantee concerning the
suitability or performance of the product.
Brüel & Kjær shall not be liable for any loss whether direct,
indirect, incidental or consequential arising from the use of or
reliance upon any of the content of this document, regardless
of whether such content has been accurate or complete.
Brüel & Kjær will not pay any damages whether for loss or
injury, punitive or otherwise, because of use of or reliance upon
any of the content in this document.
Brüel & Kjær and all other trademarks, service marks, trade
names, logos and product names are the property of
Brüel & Kjær or a third-party company. Nothing in this
document may be construed as granting, by implication, or
otherwise any license or right to use any of the trademarks
without a prior written permission of Brüel & Kjær or the owner
of such trademark.
© Brüel & Kjær. All rights reserved.
Brüel & Kjær Sound & Vibration Measurement A/S
DK-2850 Nærum · Denmark
For service and support, contact your nearest Brüel & Kjær
Customer Care support team:
Headquarters: [email protected], [phone]
China (Beijing): [phone]
France: s[email protected], [phone]
Germany: [email protected], [phone]
Italy: [email protected], [phone]
Japan: [e-mail], [phone]
North & South America: [e-mail],
[phone]
Spain: [email protected], [phone]
UK & Ireland: [e-mail], [phone]
Go to www.bksv.com/contact for contact information to our
other global offices.

Contents
CHAPTER 1
Introduction............................................................................................................................. 1
CHAPTER 2
System Overview and Setup .................................................................................................... 3
2.1 System Layout........................................................................................................................... 3
2.2 Software Installation and Getting Started ................................................................................ 4
CHAPTER 3
User Interface for Impedence Testing ...................................................................................... 7
3.1 Graphical User Interface (GUI).................................................................................................. 7
3.2 Impedance Meter Control ........................................................................................................ 7
CHAPTER 4
Project Setup ........................................................................................................................... 9
4.1 Project Setup ............................................................................................................................ 9
CHAPTER 5
Calibration............................................................................................................................. 15
5.1 General ................................................................................................................................... 15
5.2 Signal-to-Noise Ratio Check.................................................................................................... 15
5.3 Transfer Function Calibration ................................................................................................. 16
5.4 Reference Panel – Recommended for Overall System Calibration Procedures ..................... 17
5.5 Acoustic Centre Measurement ............................................................................................... 18
5.6 Channel Calibration ................................................................................................................ 19
CHAPTER 6
Sample Holder Correction ...................................................................................................... 21
6.1 General ................................................................................................................................... 21
6.2 Measurement Control Tab...................................................................................................... 21
CHAPTER 7
Measurements....................................................................................................................... 23
7.1 General ................................................................................................................................... 23
7.2 Measurement Control Tab...................................................................................................... 23
7.3 Quality Control Measurements .............................................................................................. 33

CHAPTER 8
Data Export/Import ............................................................................................................... 37
8.1 General ................................................................................................................................... 37
8.2 Export to Excel........................................................................................................................ 37
8.3 Export/Import Results ............................................................................................................ 40
8.4 Post-processing ...................................................................................................................... 40
8.5 Saving the Project................................................................................................................... 40
CHAPTER 9
Troubleshooting and Tips for Efficient Testing ....................................................................... 41
9.1 General ................................................................................................................................... 41
CHAPTER 10
Specifications ........................................................................................................................ 43
INDEX ............................................................................................................................................................ 47

1
Chapter 1
Introduction
Portable Impedance Meter System Type 9737 (Fig.1.1) represents the state of the art in normal
incidence impedance measurement for the aerospace industry. Increasingly stringent aerospace
environmental regulations are demanding acoustic lining attenuation improvements, which are
driving ever-improved installed acoustic liner impedances. As a result, fully bonded curved panels
must now be assessed for their true effective acoustic behaviour in their final condition, and
acoustic measurements are now superseding the traditional geometric and DC flow methods.
The system hardware components are shown in Fig.1.1.
Fig.1.1 Portable impedance meter system (PC not included)
Type 9737 is a lightweight, compact, robust and user-friendly system, suitable for both research and
production quality control impedance measurements, at in situ sound pressure levels up to 150 dB.
It allows immediate extraction of key acoustic parameters, such as absorption coefficient, impedance
spectra at varying overall sound pressure levels (OASPL), and the acoustic resistance variation with
acoustic velocity for a pure tone, broadband or a user-defined or recorded spectral content.
This manual provides a set of instructions for the setup and use of the meter. The instructions
serve to complement the notes supplied with the project template in PULSE™ LabShop
(see Chapter 2).

Portable Impedence Meter System Type 9737 – User Manual
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