BRUEL & KJAER 2260 User manual

English BB0955-13
Modular Precision Sound Analyzer
Type 2260
User Manual
bb095513.book Page 1 Tuesday, April 9, 2002 1:42 PM

Revision April 2002
Brüel & Kjær BB0955-13
Modular Precision Sound Analyzer
Type 2260
From serial no. 1772136
bb095513.book Page i Tuesday, April 9, 2002 1:42 PM

Brüel & KjærModular Precision Sound Analyzer Type 2260
User Manual
Trademarks
IBM is a registered trademark of International Business Machines
Inc., USA.
Microsoft is a registered trademark of Microsoft Corporation in the
United States and/or other countries.
Copyright © 1994 – 2002, Brüel&Kjær A/S
All rights reserved. No part of this publication may be reproduced
or distributed in any form, or by any means, without prior consent
in writing from Brüel & Kjær A/S, Nærum, Denmark.
End User Licence Agreement
This product contains software licensed from Microsoft®Corpora-
tion.
●The Modular Precision Sound Anlayzer Type 2260 contains intellectual
property, that is, software programs, that are licensed for use by the
end user customer (hereinafter “End User”).
●This is not a sale of such intellectual property.
●The End User shall not copy, disassemble or reverse compile the soft-
ware program.
●The software programs are provided to the end user “as is” without
warranty of any kind, either expressed or implied, including, but not
limited to, warranties of merchantability and fitness for a particular
purpose. the entire risk of the quality and performance of the software
program is with you.
●Microprocessor and Memory Distribution Limited and its suppliers
shall not be held to any liability for any damages suffered or incurred
by the end user (including, but not limited to, general, special, conse-
quential or incidental damages including damages for loss of business
profits, business interruption, loss of business information and the
like), arising from or in connection with the delivery, use or perform-
ance of the software program.
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BB0955-13 iii Modular Precision Sound Analyzer Type 2260
User Manual
4
1
Contents
Describes the analyzer, its concept and how to use this manual
How to power the analyzer, switch it on and off and find your way
around the menu system and help. Also includes the general
operating principles of the analyzer
How to prepare the analyzer for measuring – turning it into an
analyzer
How to manage your files including copying and deleting files, and
creating directories
How to set up the analyzer for outputting to a printer or a computer
How to service and repair the analyzer
The specifications and information regarding other equipment
available for use with the analyzer’s platform
An overview of the analyzer platform’s menus
Introduction
2
Getting Started
3
Setting Up the Analyzer
Managing Files
5
Outputting to a Printer or Computer
6
Service and Repair
7
Specifications
8
Menu Overviews
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iv Brüel & KjærModular Precision Sound Analyzer Type 2260
User Manual
9Index
Fold
Out Keys, Display and Sockets
An overview of the analyzer’s pushkeys, display and sockets
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BB0955-13 1 Modular Precision Sound Analyzer Type 2260
User Manual
Chapter 1
Introduction
1.1 Welcome...................................................................................... 2
1.2 How the Analyzer Works...................................................... 3
1.3 Using Application Software................................................. 5
1.4 Using Memory Cards............................................................... 5
1.5 Operating the Analyzer......................................................... 5
1.6 How to Use this Manual........................................................ 7
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Chapter 1– Introduction
Welcome...
2Brüel & KjærModular Precision Sound Analyzer Type 2260
User Manual
1.1 Welcome...
The Concept
This manual is valid for two prod-
uct ranges:
●2260 Investigator™
●2260 Observer™
These are based on the same plat-
form and share the functions de-
scribed here. They are both Type
2260 Modular Precision Sound An-
alyzers, the only difference being
the range of applications they
support.
2260 Observer supports one-chan-
nel measurements of environmen-
tal noise and noise at work,
including real-time analyses of
sound, and measurements of re-
verberation time.
2260 Investigator in addition sup-
ports advanced one- and two-
channel applications such as
building acoustics, sound intensi-
ty measurements, and FFT analy-
sis with pure tone detection.
A 2260 Observer can be factory
upgraded to a 2260 Investigator.
Fig.1.1 Modular Precision Sound
Analyzer Type 2260
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Chapter 1– Introduction
How the Analyzer Works
BB0955-13 3 Modular Precision Sound Analyzer Type 2260
User Manual
Portable Yet Powerful
Experienced users and beginners alike will appreciate having
the powerful hand-held Modular Precision Sound Analyzer
Type2260 both for outdoor field work and back at the labora-
tory. In short, the Modular Precision Sound Analyzer Type2260
provides easy-to-use solutions for the most complex applica-
tion problems.
1.2 How the Analyzer Works
A Dedicated Sound and Vibration Analysis Platform
Modular Precision Sound Analyzer Type2260 (see block dia-
gram in Fig.1.2) is a programmable platform for a dual-channel,
real-time, hand-held analyzer. With one of its installed software
applications active, it takes input from the acoustic or vibra-
tion front-end (and/or from the input sockets on its base) and
sends the 2 input signals through filters to an A/D converter.
The application software processes the digital signal and sends
output signals to a wide variety of output devices. Directly to,
for example, the 192´128pixel LCD screen or, via the D/A
convertor, to one of the output or interface sockets.
Data Storage and Transfer
Data can be stored and transferred onto credit-card sized PC-
MCIA memory cards for storage or transfer to computer. Data
can, of course, also be transferred to a computer via the serial
interface.
Post Measurement Software for a Computer
Once measured, data is transferred to a computer. One of
Brüel&Kjær’s WindowsÒ-based software packages can be used
for post-processing and reporting (Noise Explorer™ Type7815
for data management and reporting, Evaluator™ Type7820 for
Community Noise calculations, Qualifier™ Type7830 for Build-
ing Acoustics measurement or Protector™ Type7825 for cal-
culating Personal Noise Exposure). Alternatively, data can be
exported to other standard software packages such as word-
processors and spreadsheets.
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Chapter 1– Introduction
How the Analyzer Works
4Brüel & KjærModular Precision Sound Analyzer Type 2260
User Manual
Accessories
Brüel&Kjær also produces a range of accessories for use with
each application software. These accessories can be those
necessary for measurement, or items which facilitate your
measurements (see also section 7.2).
Fig.1.2 Block diagram of Modular Precision Sound Analyzer Type 2260
941702e
Input
Switch
Matrix
In
Out (Calibration)
AC In/Out
CH2
Weighting
Filters
Weighting
Filters
Gain
Gain
Overload
Overload
Digital
Audio In Digital Audio Ou
t
DSP
A/D D/A
Digital
Audio RX Digital Audio TX
Main
Processor
CH1
CH2
Attenuator
CH1
Aux. Ou
t
Preamplifier
CH2
CH1
In
Out (Calibration)
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Chapter 1– Introduction
Using Application Software
BB0955-13 5 Modular Precision Sound Analyzer Type 2260
User Manual
Support and After-sales Service
Brüel&Kjær provides a high level of support and after-sales
service in the rare event of problems, and holds customer
workshops and training for both beginners and experts alike.
1.3 Using Application Software
Application software, together with appropriate accessories,
changes the use of the Modular Precision Sound Analyzer Type
2260 into a dedicated analyzer.
The analyzer can have several software applications installed
in it at the same time. This allows you to change from one
application to another quickly and easily. Since many applica-
tions can use the same front end transducers, the Modular
Precision Sound Analyzer Type2260 gives you a highly flexible
analysis system.
1.4 Using Memory Cards
Memory cards can be used as extra memory for data storage
or for transferring data to a computer or another Modular
Precision Sound Analyzer Type2260.
Memory Cards are available from Brüel&Kjær (for example
the UL1008 with a capacity of 32Mbyte).
1.5 Operating the Analyzer
Hard Keys and Soft Keys
You use two types of push keys to operate a Modular Precision
Sound Analyzer Type 2260:
●Hard keys
●Soft keys
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Chapter 1– Introduction
Operating the Analyzer
6Brüel & KjærModular Precision Sound Analyzer Type 2260
User Manual
Hard Keys
These are push keys on the front panel which are all identified
by icons and all have fixed, application-software independent
functions (see Fold Out).
Some of them put the Modular Precision Sound Analyzer Type
2260 in one of the 4 modes it operates in when switched on:
●System
●Set-up
●Measure
●Calibrate
See the relevant chapters both in this manual and in the rel-
evant application software’s manual for more details.
Soft Keys
These are push keys to the right of the analyzer’s display. The
functions of these context-sensitive push keys are identified
by the soft-key menu on the right-hand side of the display (see
Fold Out).
See the relevant chapters both in this manual and in the rel-
evant application software’s manual for more details.
Menus
The Modular Precision Sound Analyzer Type2260 has a menu-
based user interface. Menu overviews can be found as fold
outs in both this manual and in the relevant application soft-
ware’s manual. For more details, see section 2.4.
Working with Files
The Modular Precision Sound Analyzer Type2260 can be com-
pared to a dedicated computer. It has two drives, one for an
internal disk and one for an external memory or application
card. The internal disk is organised in directories and sub-
directories.
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Chapter 1– Introduction
How to Use this Manual
BB0955-13 7 Modular Precision Sound Analyzer Type 2260
User Manual
Some of these directories are for storing measurement data,
others for storing measurement set-ups while others are for
storing installed application software. For more details, see
section 4.2.
Handling Data
Measurement data can be stored in files for later recall, print-
ing or transfer to computer for further post-processing.
Set-up data can also be stored for later use or transferred for
use in another Modular Precision Sound Analyzer Type2260.
1.6 How to Use this Manual
Beginners
Before you read this manual, read Brüel&Kjær’s Measuring
Sound primer supplied with the Modular Precision Sound An-
alyzer Type2260. This will give you a basic idea of acoustic
measurements.
Now read the following.
Experienced Users of Acoustic Measurement Equipment
This user manual is the basic manual for the Modular Precision
Sound Analyzer Type2260. All application software manuals
assume that you are familiar with operating the analyzer. The
operating principles are given in section 2.4.
The manual is built up such that you don’t have to read all of
it to be able to use the analyzer.
The application software’s user manual instructs you on how
to set up the Modular Precision Sound Analyzer Type2260 for
measurements, how to measure and how to look at your re-
sults. In short, anything which is dependent on which appli-
cation is currently being used. Anything which is independent
of which application software is being used will be found in
this manual.
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Chapter 1– Introduction
How to Use this Manual
8Brüel & KjærModular Precision Sound Analyzer Type 2260
User Manual
Overviews for the application software independent menus
can be found as fold outs in Chapter 9. Overviews of the
application software dependent menus can be found as fold
outs in the relevant application software’s manual.
This user manual consists of four parts:
●About the Modular Precision Sound Analyzer Type2260
and Getting Started: Chapters 1 and 2
●Setting Up: Chapter 3
●Handling Data: Chapters 4 and 5
●Quick Reference Data: Chapters 6, 7, 8 and 9 and Fold Out
Conventions Used in the Manuals
Hard Keys
Denoted by the relevant symbol (for example, ).
Soft Keys
Denoted by chevrons (<>) and courier type face (for example,
<Undo>).
Path Denotations
Denoted by capitals and courier type face (for example, DA-
TA\MEAS1).
Parameter Text Appearing on the Display
Denoted by courier type face (for example, Format).
Sockets
Denoted by bold type face (for example, Serial Interface).
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BB0955-13 9 Modular Precision Sound Analyzer Type 2260
User Manual
Chapter 2
Getting Started
2.1 Powering the Analyzer........................................................ 11
Introduction.......................................................................... 11
Replacing Batteries............................................................... 11
Using an External Power Supply.......................................... 11
The Back-up Battery............................................................. 13
Checking the Batteries......................................................... 13
How to Make the Batteries Last Longer ............................. 15
2.2 Switching On and Off........................................................... 16
Introduction.......................................................................... 16
Switching On......................................................................... 17
Switching Off........................................................................ 17
2.3 Finding Your Way Around the Menus......................... 17
2.4 Operating Principles.............................................................. 19
2.5 Optimizing the Screen ......................................................... 21
Introduction.......................................................................... 21
Changing the Viewing Conditions ...................................... 22
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Chapter 2– Getting Started
10 Brüel & KjærModular Precision Sound Analyzer Type 2260
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Switching the Back-light On................................................ 23
2.6 Getting Help............................................................................. 23
2.7 Rebooting the Analyzer...................................................... 24
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Chapter 2– Getting Started
Powering the Analyzer
BB0955-13 11 Modular Precision Sound Analyzer Type 2260
User Manual
2.1 Powering the Analyzer
2.1.1 Introduction
You can power the analyzer using:
●Six 1.5V LR14/C size alkaline batteries
●An external, regulated or smoothed 12V DC power supply
Note: Do not use rechargeable batteries
2.1.2 Replacing Batteries
1. Switch the analyzer off.
2. Press the two tabs on the upper edge of the battery com-
partment and remove the lid.
3. Replace the old batteries with new ones (six 1.5V LR14/C
size alkaline batteries) as shown in the battery compart-
ment and press the compartment lid back into place.
Note: If you cannot turn on the analyzer after replacing the
batteries, check that they are correctly inserted.
Warnings!
It is possible for batteries to explode or leak if they are handled
incorrectly, so:
●For long-term storage, remove the batteries and keep the
analyzer in a dry place.
●Never mix different makes or types of battery.
●Never mix fresh and discharged batteries.
2.1.3 Using an External Power Supply
The analyzer can be powered from a regulated or smoothed
12V DC supply (for example, from a 220V mains driven adap-
tor) via the External Power socket on the base, see Fig.2.1.
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Chapter 2– Getting Started
Powering the Analyzer
12 Brüel & KjærModular Precision Sound Analyzer Type 2260
User Manual
You can connect the external power supply even when the
batteries are installed. The analyzer automatically selects the
source with the highest supply voltage. The external power
supply will not damage the batteries.
Fig.2.1 The External Power socket on the base of the analyzer
Parameter Specification
Plug Pin: Positive
Casing: Signal Ground
Pin Diameter: 2.0mm
External Diameter: 5.5mm
Voltage regulated or smoothed 10–14V DC
Voltage Ripple <100mV peak to peak
Average Current 400mA
Inrush Current >1000mA
Table 2.1 Specification for the external power supply
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Chapter 2– Getting Started
Powering the Analyzer
BB0955-13 13 Modular Precision Sound Analyzer Type 2260
User Manual
2.1.4 The Back-up Battery
The analyzer has a back-up battery for running the clock, even
when the analyzer is switched off or the main batteries are
removed.
The back-up battery is automatically charged when there are
batteries in the analyzer. It is fully charged upon delivery from
the factory. Fully charged, the back-up battery runs the clock
for about three months (typically at room temperature).
If the back-up battery is flat, the next time you insert fresh
batteries into the analyzer it will automatically switch on and
boot up. You will be warned that the date and time needs to
be re-entered.
2.1.5 Checking the Batteries
You can check the status of the main batteries and set a
“battery low” warning level (the alert level).
Fig.2.2 The Battery display
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Chapter 2– Getting Started
Powering the Analyzer
14 Brüel & KjærModular Precision Sound Analyzer Type 2260
User Manual
The Alert Level
This is a level you can choose. It is shown as a numerical
value (see Fig.2.2). If the voltage falls below the alert level, a
flashing “battery low” warning appears in the top right-hand
corner. When this happens, immediately terminate your meas-
urements and store relevant data then change the batteries
(see section 2.1.2).
The amount of time before the analyzer cannot be operated
depends on the use of the analyzer (see also section 2.1.6)
and external factors such as temperature and battery quality.
The Power-off Level
This is a level fixed at 5.7V. If the voltage falls below this level,
one of the following conditions will apply:
●If the battery voltage falls slowly below this level, all meas-
urement activity stops, set-ups are stored on disk, the
latest measurement data are stored in the root directory
in the file 9999 and the analyzer switches itself off.
●If the battery voltage falls rapidly below this level, the
analyzer switches itself off and data not stored is lost
To Check the Batteries
Press the hard key.
The Battery menu appears and shows the battery voltage level
together with the Alert level and Power-off level (see Fig.2.2).
To Change the Alert Level
1. With the Battery menu shown, press the <>and <>
soft keys until the desired alert limit is shown.
2. Press the <OK> soft key to save the new alert limit and
return to the previous display.
To cancel any changes, press the <Cancel> soft key. The
analyzer returns to the previous display without saving
the alert limit.
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Chapter 2– Getting Started
Powering the Analyzer
BB0955-13 15 Modular Precision Sound Analyzer Type 2260
User Manual
2.1.6 How to Make the Batteries Last Longer
You can reduce the analyzer’s power consumption through the
settings of various power saving features as well as by setting
unused Auxiliary outputs to off.
Back-light On Time
The time from the last key push until the back light (see
section 2.5) automatically switches off.
Power-off Delay Time
The time from the last activity until the analyzer automatically
switches off (see section 2.2). An activity is a key push, meas-
urement or any communication via the serial interface (com-
puter or printer).
Setting the Power Savings
1. With the Set-up menu on the display, press the <Power
Savings> soft key.
The Power Savings menu appears (see Fig.2.3).
Fig.2.3 The Power Savings menu
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