BRUEL & KJAER 2145 Instruction Manual

Brüel & Kjær
7/6-'89
BK
Technical
Documentation
English BB0877–14
Order Tracking Analyzer
Type 2145
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Vol. 1: Operation

March 2006
Brüel & Kjær BB0877–14
Order Tracking Analyzer
Type 2145
From software version 1.20
Revision

0 – 2 Brüel & KjærOrder Tracking Analyzer Type 2145
User Manual Vol.1
Safety Considerations
This apparatus has been designed and tested in accordance with
IEC Publication 348, Safety Requirements for Electronic Measuring
Apparatus (see specifications), and has been supplied in safe condi-
tion. This User Manual contains information and warnings which
must be followed to ensure safe operation and to retain the appara-
tus in safe condition. Special note should be made of the following:
Powering the Apparatus
Before each use of the apparatus verify that it is set to match the
available mains supply voltage and that the correct fuse is inserted.
Safety Symbols
The apparatus will be marked with this symbol when it is
important to refer to the associated warning statements given in
this User Manual.
Warnings
●Switch off all power to equipment before connecting or disconnecting
their digital interface. Failure to do so could damage the equipment.
●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.
●Any adjustment maintenance and repair of the open apparatus under
voltage must be avoided as far as possible and, if unavoidable, must
be made only by trained service personnel.
Chassis
Terminal Safety Earth Terminal Hazardous Voltage
Trademarks
IBM is the international trade mark for International Business Ma-
chines Corp.
Copyright © 1993 – 1995, 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.

BB0877–14 0 – 3 Order Tracking Analyzer Type 2145
User Manual Vol.1
Contents
1. Introduction ............................................................................ 1–1
1.1 About the Type 2145...................................................1 – 2
1.2 About the Type 7668 Software ...................................1 – 2
1.3 About this User Guide ................................................1 – 3
2. Installation and Maintenance ........................................ 2–1
2.1 Power Supply ..............................................................2 – 2
2.2 Grounding Considerations..........................................2 – 6
2.3 Cleaning the Disk Drive .............................................2 – 8
2.4 Installing the Software Key .......................................2 – 9
3. Controls and Connections ................................................ 3–1
3.1 Front Panel..................................................................3 – 2
3.2 Rear Panel ...................................................................3 – 5
4. Getting Started ..................................................................... 4–1
4.1 Switching On...............................................................4 – 2
4.2 General Measurement Procedure ..............................4 – 4
4.3 The Menu and Help Page System..............................4 – 5
4.4 Changing Parameters in a Set-up............................4 – 10
5. Main Menu – Page 1 ........................................................... 5–1
5.1 Introduction.................................................................5 – 3
5.2 Analysis Set-up ...........................................................5 – 4
5.3 Input ............................................................................5 – 8
5.4 Calibration ..................................................................5 – 9
5.5 Tacho Input and Tacho Parameters ........................5 – 19

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User Manual Vol.1
5.6 Setting up Tacho Parameters ..................................5 – 23
5.7 Averaging .................................................................. 5 – 33
5.8 Interval Averaging.................................................... 5 – 35
6. Main Menu – Page 2 ........................................................... 6–1
6.1 Introduction ................................................................ 6 – 3
6.2 Display Modes.............................................................6 – 4
6.3 Text.............................................................................. 6 – 8
6.4 Hold ........................................................................... 6 – 12
6.5 Trigger Multimode.................................................... 6 – 15
6.6 Spectrum Weighting.................................................6 – 32
6.7 Memory......................................................................6 – 37
6.8 I/O Interface.............................................................. 6 – 43
7. Main Menu – Page 3 ........................................................... 7–1
7.1 Introduction ................................................................ 7 – 2
7.2 Preselected Set-up ...................................................... 7 – 2
7.3 Autosequence ..............................................................7 – 4
7.4 Real-time Clock......................................................... 7 – 13
7.5 Back Lighting............................................................7 – 17
7.6 Applications...............................................................7 – 19
8. Analysis Functions .............................................................. 8–1
8.1 Introduction ................................................................ 8 – 3
8.2 Autospectrum Analysis .............................................. 8 – 5
8.3 Order Analysis ............................................................8 – 6
8.4 Broadband Channels ................................................ 8 – 10
8.5 Choosing an Analogue Input Filter ......................... 8 – 11
8.6 Tacho Parameters.....................................................8 – 12
8.7 DC Channels .............................................................8 – 17
8.8 Digital Channel.........................................................8 – 17
8.9 Overload Indicators ..................................................8 – 18
8.10 Summary of Analysis Functions..............................8 – 20

BB0877–14 0 – 5 Order Tracking Analyzer Type 2145
User Manual Vol.1
9. Data Acquisition ................................................................... 9–1
9.1 Introduction.................................................................9 – 2
9.2 Making a Single Measurement ..................................9 – 4
9.3 Trigger Multimode Uses.............................................9 – 5
10. Measurement Mode ........................................................... 10–1
10.1 Measurement Mode Display.....................................10 – 2
10.2 Measurement Mode Pages......................................10 – 14
10.3 Display Modes .........................................................10 – 18
11. Appendix ................................................................................ 11–1
11.1 Personal Computer (PC) Utilities ............................ 11– 2
11.2 Using TEXT7668.EXE .............................................. 11– 2
11.3 Using CONV7668.EXE ............................................. 11– 5
11.4 Remote Control ZH 0611........................................... 11– 8
12. Error Messages ................................................................... 12–1
12.1 Error Messages ......................................................... 12–2
12.2 Provoked Errors and Other Messages ..................... 12–5
13. Specifications ....................................................................... 13–1
13.1 Specifications 2145 ................................................... 13–2
13.2 Filter Characteristics................................................ 13–8
14. Service and Repair ............................................................. 14–1
Index

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User Manual Vol.1

BB0877–14 1 – 1 Order Tracking Analyzer Type 2145
User Manual Vol.1
Chapter 1
Introduction
1.1 About the Type 2145........................................................... 1 – 2
1.2 About the Type 7668 Software....................................... 1 – 2
1.3 About this User Guide........................................................ 1 – 3

Chapter 1 – Introduction
About the Type 2145
1 – 2 Brüel & KjærOrder Tracking Analyzer Type 2145
User Manual Vol.1
1.1 About the Type 2145
The Analyzer
The Order Tracking Analyzer Type 2145 is a portable, digital-
filter, frequency analyzer which can also perform order analyses
for acoustics and vibration measurements. Its light weight and
water-repellent cabinet make it especially well-suited for use in
the field. Yet its measuring capabilities easily match those of
laboratory instruments. The analyzer features real-time opera-
tion across its working frequency ranges which are doubled for
single channel operation. It has two versatile tacho trigger inputs
which give the 2145 a tremendous advantage over conventional
analyzers when it comes to analysing motor vehicle sounds and
vibrations. Its is capable of providing, in real-time, 20-order
analysis simultaneously with spectral data in 1/1-, 1
/3 - or 1/12
octave bands.
Menus and Help
The analyzer is operated by means of user-interactive menus.
These enable you to become quickly familiar with the use of the
analyzer. Access to a system of on-screen help pages provides
you with information about the use of the menus at any time
and in any place.
Data Storage
A large internal non-volatile memory together with back-up disk
storage facilities makes the analyzer a powerful data-gathering
device. The IEEE–488 and RS–232 interfaces allow data-process-
ing and external control.
1.2 About the Type 7668 Software
The Type 7668 is the software for the Order Tracking Analyzer
Type 2145. It comes on a single 31/2″disk and is loaded using
the analyzer’s built-in disk drive. A software key must be in-
stalled in the analyzer to allow the program to be run. The
analyzer is already fitted with this key on delivery. It is also