Measurement-computing Medallion Rotate rev.2.3 User Manual

© 2001 by IOtech, Inc August 2001 Printed in the United States of AmericaMedallion Rotate User’s Manualthe smart approach to instrumentation ™IOtech,

10Medallion Rotate Manual October 2000FEATURES AVAILABLE ONLY IN MEDALLION ROTATE PLUSThe following features are available only in Medallion Rotate Pl

October 2000 Medallion Rotate Manual11RPM FROM WATERFALL ANALYSISThe RPM from Waterfall analysis in Medallion Rotate Plus allows you todetermine the m

12Medallion Rotate Manual October 2000CHAPTER TWOMEDALLION ROTATE GUIDED TOURThis chapter provides a brief overview of the Medallion Rotate program. I

October 2000 Medallion Rotate Manual13USING MEDALLION ROTATESTARTING THE SOFTWARETo start Medallion Rotate, click Start, point to Programs, then toMed

14Medallion Rotate Manual October 2000• The Channel List window shows the channels (tachometer and data)that you have imported into, or created in, Me

October 2000 Medallion Rotate Manual15STARTING MEDALLION ROTATE AND DISPLAYING CHANNELSThe first section of the Tutorial leads you through starting Me

16Medallion Rotate Manual October 2000ADD A DATA FILEAdding a data “file displays all the channelsof data from that file. Medallion Rotate can displa

October 2000 Medallion Rotate Manual17DISPLAYING DATA AND PROCESSING A SIGNALThe second section of the Tutorial leads you through displaying a timewav

18Medallion Rotate Manual October 2000PROCESS A TACHOMETER SIGNALChannel 1 should still be selected in the Channel List window. Channel 1 isa tachomet

October 2000 Medallion Rotate Manual19OTHER TYPES OF ANALYSESYou can perform many other types of analyses in Medallion Rotate toassist in diagnosing a

20Medallion Rotate Manual October 2000RENAME A GENERATED DATA FILEWhen you perform an analysis, Medallion Rotate generates a data file foreach generat

October 2000 Medallion Rotate Manual21CHAPTER THREEMEDALLION ROTATE APPLICATIONSThis chapter describes the analysis methods available in Medallion Rot

22Medallion Rotate Manual October 2000ALIASINGAliasing is an artifact of collecting data caused by using a sampling ratethat is less than twice as hig

October 2000 Medallion Rotate Manual23APPLICATIONSProcessing the tachometer signal results in an RPM curve describing theinstantaneous machine speed.

24Medallion Rotate Manual October 2000EXAMPLEThe following example is taken from a rolling mill. As the sheet of metal isrolled out, the speed of the

October 2000 Medallion Rotate Manual25WATERFALL ANALYSISYou can perform a Waterfall analysison time waveform data from anytransducer. The data transdu

26Medallion Rotate Manual October 2000APPLICATIONSThe Medallion Rotate Waterfall plot is ideal for non-steady state processessuch as variable speed ma

October 2000 Medallion Rotate Manual27EXAMPLEThe following example is from a turbine.1. Process the tachometer signal to get the smoothed speed curve.

28Medallion Rotate Manual October 2000In this Waterfall plot, there arecursors at 0.5 1, 1.5, and 2 orders. The 0.5order cursor highlights a turbine r

October 2000 Medallion Rotate Manual29RPM FROM WATERFALLThe RPM from Waterfall function in Medallion Rotate Plus allows you todetermine the machine sp

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

30Medallion Rotate Manual October 20002. From the Analysis menu,choose RPM from Waterfall.This displays a color contourplot of the waterfall.3. Enter

October 2000 Medallion Rotate Manual31COMPUTED ORDER TRACKINGComputed Order Tracking uses the smooth speed curve from processing atachometer signal or

32Medallion Rotate Manual October 2000EXAMPLEThis example is from the demonstration data included with MedallionRotate.1. Process the tachometer signa

October 2000 Medallion Rotate Manual33TORSIONAL ANALYSISMedallion Rotate can process a tachometer or other machine speed signalto create an accurate k

34Medallion Rotate Manual October 2000INPUT SIGNAL REQUIREMENTSThe fixed sampling rate for the machine speed signal must be high enoughto give a good

October 2000 Medallion Rotate Manual353. Choose OK to close the Preferences dialog box.4. Process the tachometer signal. See “Process a Tachometer Sig

36Medallion Rotate Manual October 2000and choose Properties. Then select the parameter for the cursor underTrack axis on the Cursor tab.You can also u

October 2000 Medallion Rotate Manual37ORDER NORMALIZATIONMedallion Rotate Plus can resample a time waveform to order normalize thedata when performing

38Medallion Rotate Manual October 2000EXAMPLEThis example shows the difference inthe appearance of a Waterfall plotresulting from order normalization.

October 2000 Medallion Rotate Manual39MILLSTRUM ANALYSISMillstrum analysis in Medallion Rotate Plus simplifies the process ofidentifying families of h

40Medallion Rotate Manual October 2000• More spectral lines are required for the Millstrum analysis, since theanalysis reduces the number of lines in

October 2000 Medallion Rotate Manual41More formally, Millstrum analysis is essentially the Fourier transform of thelogarithm of the absolute value of

42Medallion Rotate Manual October 2000ME’scope animates the wire-frame model so that you can view the physicaldeflection of the components at specific

October 2000 Medallion Rotate Manual43CHAPTER FOURMEDALLION ROTATE PLOTTING FEATURESThis chapter describes the plots in Medallion Rotate. It covers th

44Medallion Rotate Manual October 2000GENERAL PLOT FEATURESThe plotting features described in this section are common to all of theplots, unless other

October 2000 Medallion Rotate Manual45jumps to the nearest peak in the trace (peak mode).• If you hold down the Shift key when moving the cursor, the

46Medallion Rotate Manual October 2000RPM (MACHINE SPEED) PLOTSThe plot below shows two RPM curves that display the instantaneousspeed of a machine. Y

October 2000 Medallion Rotate Manual47CONTOUR PLOTThe “Contour plot is similar to a Waterfall plot in that it displays multiplespectra plotted as a f

48Medallion Rotate Manual October 2000

October 2000 Medallion Rotate Manual49IndexAAdd Cursor command 44Add File:button 15Add File:command 15adding a data file 15analysis files director

October 2000 Medallion Rotate ManualCHAPTER ONEINTRODUCTION TO MEDALLION ROTATE ...7OVERVIEW OF MEDALLION ROTATE ...

50Medallion Rotate Manual October 2000exporting computed orders toME’scope 40Ffeatures in Medallion Rotate Plus10files:creating Torsion analysis file

October 2000 Medallion Rotate Manual51plots:Bode plot 47plots:Contour 47plots:frequency units 13plots:machine speed 17, 46plots:Millstrum 39plots

52Medallion Rotate Manual October 2000toolbars:hiding 12toolbars:moving 12Torsional analysis:applications 32Torsional analysis:creating file13, 32T

Medallion Rotate Manual October 2000EXAMPLE ...29THEORY ...

October 2000 Medallion Rotate Manual7CHAPTER ONEINTRODUCTION TO MEDALLION ROTATEThis chapter introduces you to Medallion Rotate™. It describes Medalli

8Medallion Rotate Manual October 2000OVERVIEW OF MEDALLION ROTATEMedallion Rotate is a powerful software package for analyzing noise andvibration in m

October 2000 Medallion Rotate Manual9OVERVIEW OF THIS USER’S GUIDEORGANIZATIONThis User’s Guide contains the following chapters.Chapter 1 “Introductio