Measurement Medallion Rotate User Manual

Medallion Rotate User’s Manual

the smart approach to instrumentation ™

IOtech, Inc.

25971 Cannon Road

Cleveland, OH 44146-1833

Phone: [phone]

Fax: [phone]

E-mail (sales): [e-mail]

E-mail (post-sales): [e-mail]

Internet: www.iotech.com

Medallion Rotate User’s Manual

p/n 1086-0926, rev 2.3

© 2001 by IOtech, Inc August 2001 Printed in the United States of America

Warranty Information

Your IOtech warranty is as stated on the product warranty card. You may contact IOtech by phone,
fax machine, or e-mail in regard to warranty-related issues.

Phone: [phone], fax: [phone], e-mail: [e-mail]

Limitation of Liability

IOtech, Inc. cannot be held liable for any damages resulting from the use or misuse of this product.

Copyright, Trademark, and Licensing Notice

All IOtech documentation, software, and hardware are copyright with all rights reserved. No part of this product may be
copied, reproduced or transmitted by any mechanical, photographic, electronic, or other method without IOtech’s prior written
consent. IOtech product names are trademarked; other product names, as applicable, are trademarks of their respective
holders. All supplied IOtech software (including miscellaneous support files, drivers, and sample programs) may only be used
on one installation. You may make archival backup copies.

VSI Rotate®, VSI Rotate Plus®, and VSI DSPLibs®, are owned and registered by Vold Solutions Incorporated. Vold Solutions
Incorporated maintains the copyright to the material presented in this user’s guide, unless otherwise noted or implied.

FCC Statement

IOtech devices emit radio frequency energy in levels compliant with Federal Communications Commission rules (Part 15)
for Class A devices. If necessary, refer to the FCC booklet How To Identify and Resolve Radio-TV Interference Problems
(stock # 004-000-00345-4) which is available from the U.S. Government Printing Office, Washington, D.C. 20402.

CE Notice

Many IOtech products carry the CE marker indicating they comply with the safety and emissions standards of the
European Community. As applicable, we ship these products with a Declaration of Conformity stating which
specifications and operating conditions apply.

Warnings, Cautions, Notes, and Tips

Refer all service to qualified personnel. This warns of possible personal injury or equipment damage under noted
conditions. Follow all safety standards of professional practice and the recommendations in this manual. Using this
equipment in ways other than described in this manual can present serious safety hazards or cause equipment damage.

This warning symbol is used in this manual or on the equipment to warn of possible injury or death from electrical
shock under noted conditions.

Use proper ESD handling guidelines when handling equipment or components sensitive to damage from electrostatic
discharge. Proper handling guidelines include the use of grounded anti-static mats and wrist straps, ESD-protective bags
and cartons, and related procedures.

Specifications and Calibration

Specifications are subject to change without notice. Significant changes will be addressed in an addendum or revision to the
manual. As applicable, IOtech calibrates its hardware to published specifications. Periodic hardware calibration is not covered
under the warranty and must be performed by qualified personnel as specified in this manual. Improper calibration procedures
may void the warranty.

Quality Notice

IOtech has maintained ISO 9001 certification since 1996. Prior to shipment, we thoroughly test our products and review
our documentation to assure the highest quality in all aspects. In a spirit of continuous improvement, IOtech welcomes
your suggestions.

October 2000 Medallion Rotate Manual

TABLE OF CONTENTS

CHAPTER ONE

INTRODUCTION TO MEDALLION ROTATE ..................................7

OVERVIEW OF MEDALLION ROTATE ............................................................8

OVERVIEW OF THIS USER’S GUIDE ............................................................9

O

RGANIZATION ...................................................................................9

DOCUMENT CONVENTIONS ....................................................................9

TERMS USED IN THIS GUIDE .................................................................9

CUSTOMER SUPPORT ...........................................................................9

FEATURES AVAILABLE ONLY IN MEDALLION ROTATE PLUS ............................10

BEARING, GEARBOX, AND SIDEBAND CURSORS ......................................10

ORDER NORMALIZING ........................................................................10

MILLSTRUM ANALYSIS ........................................................................10

RPM FROM WATERFALL ANALYSIS ......................................................11

CHAPTER TWO

MEDALLION ROTATE GUIDED TOUR ....................................12

USING MEDALLION ROTATE.....................................................................13

STARTING THE SOFTWARE ..................................................................13

THE MEDALLION ROTATE USER INTERFACE .............................................13

SETTING YOUR PREFERENCES ............................................................14

STARTING MEDALLION ROTATE AND DISPLAYING CHANNELS ..........................15

DISPLAYING DATA AND PROCESSING A SIGNAL...........................................17

EXPORTING A CHANNEL AND FILE MANAGEMENT ........................................19

CHAPTER THREE

MEDALLION ROTATE APPLICATIONS ....................................21

NOTES ON COLLECTING DATA ..................................................................21

SAMPLE RATE ...................................................................................21

ALIASING .........................................................................................22

PROCESSING A TACHOMETER SIGNAL .......................................................22

APPLICATIONS ..................................................................................23

INPUT SIGNAL REQUIREMENTS .............................................................23

EXAMPLE .........................................................................................24

THEORY ..........................................................................................24

WATERFALL ANALYSIS ...........................................................................25

APPLICATIONS ..................................................................................26

INPUT SIGNAL REQUIREMENTS .............................................................26

EXAMPLE .........................................................................................27

THEORY ..........................................................................................28

RPM FROM WATERFALL .......................................................................29

APPLICATIONS ..................................................................................29

INPUT .............................................................................................29

Medallion Rotate Manual October 2000

EXAMPLE .........................................................................................29

THEORY ..........................................................................................30

COMPUTED ORDER TRACKING ................................................................31

APPLICATIONS ..................................................................................31

INPUT SIGNAL REQUIREMENTS .............................................................31

EXAMPLE .........................................................................................32

THEORY ..........................................................................................32

TORSIONAL ANALYSIS ...........................................................................33

APPLICATIONS ..................................................................................33

INPUT SIGNAL REQUIREMENTS .............................................................33

EXAMPLE .........................................................................................34

THEORY ..........................................................................................36

ORDER NORMALIZATION .........................................................................37

APPLICATIONS ..................................................................................37

INPUT SIGNAL REQUIREMENTS .............................................................37

EXAMPLE .........................................................................................38

THEORY ..........................................................................................38

MILLSTRUM ANALYSIS ...........................................................................39

APPLICATIONS ..................................................................................39

INPUT SIGNAL REQUIREMENTS .............................................................39

EXAMPLE .........................................................................................40

THEORY ..........................................................................................40

EXPORTING CALCULATED ORDERS DATA TO ME’SCOPE ...............................41

APPLICATIONS ..................................................................................41

INPUT SIGNAL REQUIREMENTS .............................................................42

EXAMPLE .........................................................................................42

CHAPTER FOUR

MEDALLION ROTATE PLOTTING FEATURES ...........................43

GENERAL PLOT FEATURES .....................................................................44

RIGHT-CLICK MENU ..........................................................................44

SELECTING THE ACTIVE TRACE ............................................................44

SELECTING THE ACTIVE CURSOR .........................................................44

MOVING A CURSOR ...........................................................................44

SAVING THE PLOT APPEARANCE AS THE DEFAULT ....................................45

TIME WAVEFORM PLOT ..........................................................................45

RPM (MACHINE SPEED) PLOTS .............................................................46

WATERFALL PLOT .................................................................................46

CONTOUR PLOT ...................................................................................47

ORDER TRACKING PLOT ........................................................................47

Index ..............................................................................................49

October 2000 Medallion Rotate Manual

CHAPTER ONE

INTRODUCTION TO MEDALLION ROTATE

This chapter introduces you to Medallion Rotate™. It describes Medallion
Rotate in broad terms, including how it can assist you in diagnosing machine
problems. It also describes the differences between Medallion Rotate and
Medallion Rotate Plus™. Medallion Rotate Plus is an enhanced version of the
product, including powerful features that increase your capability to diagnose
problems.

7

Medallion Rotate Manual October 2000

OVERVIEW OF MEDALLION ROTATE

Medallion Rotate is a powerful software package for analyzing noise and
vibration in mechanical equipment. It includes a set of analytical functions that
process machine speed (tachometer) and time waveform (data) signals from
almost any type of sensor.

Medallion Rotate is designed for Engineers and advanced machinery
analysts who diagnose vibration, acoustic, and other problems. Medallion
Rotate takes raw time waveform data as the input, and lets you analyze the data
in many different ways to support the clearest diagnosis. However, you must
understand the machinery and be able to identify the frequencies originating
from the different components.

One of the many advantages is that you can collect hours of time
waveform data, then pick out only the few minutes of interest. Medallion Rotate
is fast, and provides the following analysis functions.

• Tachometer analysis processes a machine speed signal (pulsed or DC
voltage) to create the instantaneous machine speed curve in RPM.

• Waterfall analysis computes and displays multiple spectra over time in a
traditional 3-dimensional Waterfall plot or Color Contour plot.

• RPM from Waterfall analysis allows you to compute an instantaneous
speed curve from a time waveform (data) when you do not have or
cannot use a tachometer on a machine.This allows you to accurately
determine the machine speed in many cases without a tachometer.

• Computed Order Tracking shows you the magnitude and phase change
for multiple orders over time in a Bode plot.

• Order normalization order normalizes the data when performing a
Waterfall analysis.

• Torsional vibration analysis creates an accurate kinematic description
of torsional vibrations from a single tachometer or other machine speed
signal.

• Millstrum analysis in Medallion Rotate Plus simplifies the process of
identifying families of harmonics and sidebands.

• Advanced plotting features such as sophisticated cursors simplify
identifying the spectral peaks in Waterfall and Contour plots.

• Medallion Rotate can import time waveform data from many sources,
including Teac, Sony, HP-SDF, Zonic Medallion, Vibe-Tech, ASCII,
WAV, MATLAB, Dactron, SDRC-UFF, MEGADAC, Nicolet Prism,
Nicolet NRF, STAC Rex, and SoMat Ease.

• If you have the ME’Scope™ program from Vibrant Technology, you can
export computed order tracking data to ME’scope for operating
deflection shape analysis.

8

October 2000 Medallion Rotate Manual

OVERVIEW OF THIS USER’S GUIDE

ORGANIZATION

This User’s Guide contains the following chapters.

Chapter 1 “Introduction to Medallion Rotate”, introduces the Medallion
Rotate program. It provides an overview of this User’s Guide, and also
describes the additional analysis features available in Medallion Rotate Plus.

Chapter 2 “Medallion Rotate Guided Tour”, describes the Medallion Rotate
program. It guides you through the user interface. It then explains how to
operate the software by leading you through a tour of the basic features.

Chapter 3 “Medallion Rotate Applications”, describes the powerful
analysis tools available in Medallion Rotate and Medallion Rotate Plus. It
begins with some general notes on collecting data. Then each section includes
a description of the analysis tool, some possible applications, conditions for
the input data, and a brief explanation of the theory behind the analysis tool.

Chapter 4 “Medallion Rotate Plotting Features”, describes the various
plotting tools available in Medallion Rotate and Medallion Rotate Plus. It
covers both the plotting features and the different types of plots.

DOCUMENT CONVENTIONS

This User’s Guide uses the following conventions.

Menu names, commands, and controls in dialog boxes are in boldface type.

Keys on the computer keyboard are in boldface type.

Caution: Cautions warn you about actions that could delete data.

Hint: Hints point out additional useful information, such as alternative

ways to do certain tasks.

TERMS USED IN THIS GUIDE

Medallion Rotate and Rotate are used interchangeably throughout this

User’s Guide and in the online help. In general, they refer to both Medallion
Rotate and Medallion Rotate Plus. Some features are available only in
Medallion Rotate Plus—see “Features Available Only in Medallion Rotate
Plus.”

Time waveform is used for any time domain data that you can process in
Medallion Rotate. This includes, but is not limited to, signals from tachometers,
accelerometers, non-contact eddy current probes, encoders, and microphones.

Order normalization is used in describing the process of resampling a time
waveform using a constant angular rotational interval, as opposed to
conventional sampling using a constant time interval. Medallion Rotate Plus
uses resampling to order normalize the data.

9

Medallion Rotate Manual October 2000

FEATURES AVAILABLE ONLY IN MEDALLION ROTATE PLUS

The following features are available only in Medallion Rotate Plus, and not
in the standard Medallion Rotate. You can upgrade your copy of Medallion
Rotate to Medallion Rotate Plus to get these additional features. Contact Zonic
Corporation for more information.

BEARING, GEARBOX, AND SIDEBAND CURSORS

Medallion Rotate Plus includes three new cursors. For more information on
plotting features, refer to Chapter 4, “Medallion Rotate Plotting Features”.

• The Rolling Element Bearing cursor displays up to 6 cursors to help
you identify peaks caused by individual components of a bearing.

• The Gearbox cursor displays up to 8 cursors based on the number of
input and output gear teeth to help you identify peaks caused by gears.

• The Planetary Gearbox cursor displays up to 11 cursors based on the
number of gear teeth to help you identify peaks caused by planetary
gears.

• The Sideband cursor displays a user-defined number of sideband
cursors to help you identify sideband frequencies around a primary
frequency.

ORDER NORMALIZING

Medallion Rotate Plus can resample a time waveform to order normalize the
data when performing a Waterfall analysis. Order normalization cancels the
effect of frequency smearing across spectral bins when the shaft speed is
changing rapidly (high slew rate). It ensures that order-related peaks are aligned
with the orders when plotted against the orders.

MILLSTRUM ANALYSIS

Millstrum analysis in Medallion Rotate Plus simplifies the process of
identifying families of harmonics and sidebands. Millstrum analysis does this
by removing non-repetitive events and presenting the results in an easily­understood format. It is similar to using the cepstrum, but goes further in
simplifying the results so that you do not have to perform any additional
calculations.

10

October 2000 Medallion Rotate Manual

RPM FROM WATERFALL ANALYSIS

The RPM from Waterfall analysis in Medallion Rotate Plus allows you to
determine the machine speed from a Waterfall analysis. Even though you do
not have a tachometer signal, you can create the smoothed machine speed
curve that describes the instantaneous speed of the machine over time.

11

Medallion Rotate Manual October 2000

CHAPTER TWO
MEDALLION ROTATE GUIDED TOUR

This chapter provides a brief overview of the Medallion Rotate program. It
then leads you through a short tutorial to introduce you to the basic functions
of Medallion Rotate. After you have completed this chapter, you will be able to
perform the steps to import and begin to analyze data in Medallion Rotate.

This tutorial uses the demonstration data that is automatically installed
with Medallion Rotate.

12

October 2000 Medallion Rotate Manual

USING MEDALLION ROTATE

STARTING THE SOFTWARE

To start Medallion Rotate, click Start, point to Programs, then to

Medallion Rotate, then click Medallion Rotate.

The Medallion Rotate program window appears.

To stop Medallion Rotate, simply choose Exit from the File menu.

THE MEDALLION ROTATE USER INTERFACE

Medallion Rotate follows the standard Windows¨ user interface standards,
and consists of the usual windows, menus, and toolbars. A picture of the
Medallion Rotate window appears below.

Title bar

Menu bar

Toolbar

Status bar

• The title bar displays the program name.

• The menu bar appears directly below the title bar. It contains the menus

of commands for the program.

• The toolbar appears directly below the menu bar. It contains the tool
buttons that are shortcuts to the most often used functions of the
program. A short ToolTip describing the button function appears when
you move the mouse pointer over a button. You can click and drag a
toolbar to any position within the program window, and “dock” it to
any side of the window. You can also show or hide any toolbar with the
commands on the View menu.

• The status bar shows a brief description of the current command or
button under the mouse pointer.

• Many parts of the program have right-click menus. For example, you
can right-click on a plot window to display a menu of functions for that
plot.

13

Medallion Rotate Manual October 2000

• The Channel List window shows the channels (tachometer and data)
that you have imported into, or created in, Medallion Rotate. To display
the Channel List window, right-click anywhere in the Medallion Rotate
program window (except on the menu bar).

• The online help describes each command, dialog box, and plot. To
display the online help, do one of the following:

• Highlight a command on a menu and press F1. This displays an

explanation of the command.

• Open a dialog box and press F1. This displays an explanation of the

controls in the dialog box.

• Make a plot window active by clicking on the plot and press F1.

This displays a description of the functions available for that plot.

SETTING YOUR PREFERENCES

The preferences settings control the default Medallion Rotate appearance

and functions. These include the following defaults.

• Frequency units in plots

• Waterfall plot type (waterfall or contour)

• Default time increment and sampling frequency

• Automatic plot display after analysis

• Creation of a Torsional analysis file when processing a tachometer

signal

• The directory for the files created by the Medallion Rotate analysis
functions

To set your preferences, follow these steps.

1. Start Medallion Rotate. See “Starting the Software.”

2. From the Edit menu choose
Preferences.

3. In the Preferences dialog box,
select or enter the desired
defaults. Press F1 for a
description of the options.

4. Choose OK when finished.

14

October 2000 Medallion Rotate Manual

STARTING MEDALLION ROTATE AND DISPLAYING CHANNELS

The first section of the Tutorial leads you through starting Medallion

Rotate, as well as opening a data file and displaying data channels in the file.

START MEDALLION ROTATE

1. To start Medallion Rotate, click Start, point to Programs, then to
Medallion Rotate, then click Medallion Rotate. The Medallion Rotate

program window appears.

VIEW THE CHANNEL LIST

Medallion Rotate displays the
Channel List window when it starts.
Initially the Channel List shows the 2
channels of data from the demonstration
data file.

Hint: Don’t worry if the Channels

List window is empty, or contains different files than the ones shown in
the picture. Adding files to the Channel List window is described below.

2. You can hide the Channel List window by clicking anywhere on the
Medallion Rotate window or by pressing Esc.

3. You can restore the Channel List window by doing one of the following:

• Right-click on the Medallion Rotate window.

• Press Ctrl+L.

• Click the Channel List

button .

• From the Channels menu

choose Channel List
Window.

REMOVE CHANNELS FROM THE CHANNEL LIST

Removing “channels from the Channel List window does not delete any

data, and you can add the channels back in at any time.

4. Select the 2 channels in the Channel List by holding down the Ctrl key
and clicking the two channels. You can also hold down the Shift key
and select a range of channels.

5. Press Del.

Hint: You can also right-click a

channel and choose Remove.
Note that this removes all
selected channels, not just the
one you right-clicked.

15

Medallion Rotate Manual October 2000

ADD A DAT A FILE

Adding a data “file displays all the channels
of data from that file. Medallion Rotate can display
the channels from a number of different file
formats.

6. Right-click on the Channel List and choose
Add File.

7. Select the correct Files of type. If you don’t know the file type, select
All Files (*.*). For this example, select Medallion File (*.mrd).

8. Select the Demo_Data.MRD file and choose Open. The data channels
from the data file appear in the Channel List (Channel 1, Channel 2).

Hint: You can also do one of the following to add a file:

• Click the Add File button

• From the Channels menu choose Add File.

.

16