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Agilent Technologies Agilent 35670A manual AGILENT 35670A Supplemental Operator’s Guide

Models: Agilent 35670A

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AGILENT 35670A

Supplemental Operator’s Guide

Section 20 : Peak Hold During a Machine Run-up and Coast-Down

Peak amplitudes experienced during run-ups and coast-downs can be measured directly with the AGILENT 35670A using peak hold. Although the resulting spectra will indicate the maximum amplitude measured in each frequency bin during the course of the run-up and run-down, it is not possible to determine from this information whether the peak was due to the fundamental frequency or a harmonic.

To measure peak amplitudes, peak hold averaging is selected with enough averages specified so that peaks can be accumulated during the entire run-up and run-down, after which the measurement is paused and the results examined.

To set up a single-channel peak hold average for a run-up duration of 1 minute, proceed as follows:

•Select a frequency span and resolution, for example 800 Hz and 400 lines.

•Determine the time record length for this combination, T=N/F=400/800=0.5 s

•Determine how many averages are required to last for the measurement duration. Navg=Duration/T=60/.5=120 averages

•Specify number of averages to be greater than this number.

Preset the AGILENT 35670A

•Turn on the AGILENT 35670A, or

•Press the green [Preset] hardkey

•Press the yellow [Pause/Cont] hardkey if desired.

•Press [CHANNELS 1 2 4 ] softkey (F7) until 1 is highlighted.

Specify measurement parameters

•Press the [Freq] hardkey

•Enter 800 and then press the [Hz] softkey (F2)

•Press the [Avg] hardkey.

•Press the [NUMBER AVERAGES] softkey (F2), enter 200, then press the

[ENTER] softkey (F1).

•Turn on averaging by pressing the [AVERAGE ON OFF] softkey (F1) until ON is highlighted.

•Press the [AVERAGE TYPE] softkey (F3).

•Press the [PEAK HOLD] softkey (F5).

Set up display format to measure peak amplitude

•Press the [Disp Format] hardkey.

•Press the [SINGLE] softkey (F1)

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Agilent Technologies Agilent 35670A manual AGILENT 35670A Supplemental Operator’s Guide

Contents

for the Agilent 35670A Dynamic Signal Analyzer Supplemental Operator’s GuideAGILENT 35670A Supplemental Operator’s Guide SECTION 13 ORDER DOMAIN RESULTS IN LIST MODE SECTION 24 PLOTTING AND PRINTING TRACE DATA Section 1 Turning On the AGILENT 35670A Trac Coord Coord A Inst ModeMeas Data FreqSection 3 Measuring with Transducers Using ICP-TypeTransducers with the AGILENT 35670AUsing Transducers with External Preamplifiers Specifying Transducer Sensitivity and Units Selecting Frequency Span Setting Up Transducer Units for DisplacementSelecting Single Channel Operation Frequency Spans Available for the AGILENT 35670A Quantifying Power Spectrum Results Section 5 Improving Measurement Results Frequency Zooming to Increase ResolutionMaximizing Dynamic Range Averaging to Reduce Measurement Variance AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Selecting Single Channel OperationSelecting Time Record Length Displaying Time WaveformsEvent Triggering Quantifying Time Trace Results Section 7 Measuring Dual Channel Spectra Presetting the AnalyzerSelecting Dual Channel Operation Selecting Frequency SpanUsing Markers with Dual Channel Measurements Coupled Markers Coupled Markers with Peak TrackingDual Channel Averaging Maximizing Dynamic RangeAGILENT 35670A Supplemental Operator’s Guide Selecting Dual Channel Operation Displaying Dual Time WaveformsSection 9 Measuring Dual Channel Time Waveforms Selecting Time Record LengthArming Dual Channel Time Measurements Triggering a Dual-ChannelTime MeasurementTrigger Delay Using Markers with Dual Channel Time Measurements AGILENT 35670A Supplemental Operator’s Guide Setting Up the Transducer Parameters Specifying Trigger Parameters Setting Up Input RangeChoosing a Preliminary Frequency Span Setting Up Time Displays WAITING FOR CH 1 TRIGGERUsing Force/Response Windows Displaying Hammer Test Results AveragingAGILENT 35670A Supplemental Operator’s Guide Changing Frequency Span Delay = 01.T ForceWidth = T ExponentialDecay = TAGILENT 35670A Supplemental Operator’s Guide Prepare the order display as follows AGILENT 35670A Supplemental Operator’s GuideSection 13 Order Domain Results in List Mode Prepare the order results list as followsAGILENT 35670A Supplemental Operator’s Guide To start taking measurementsSelecting Measurement Parameters Recalling the Spectra from Disk Recalling the Spectra from Non-VolatileRAMScaling the Displays Using Markers to Compare Selecting Single Channel Operation Setting Up the Waterfall DisplaySection 15 Waterfall Spectra at Time Intervals Selecting Measurement ParametersSetting Up Time Step Arm Using Slice Markers with Waterfall DataAGILENT 35670A Supplemental Operator’s Guide Section 16 Waterfall Spectra at RPM Intervals Setting Up the TachometerSpecifying the Start RPM Starting and Pausing a Measurement Scaling the DisplayAGILENT 35670A Supplemental Operator’s Guide Accelerometer Polarity Set up triggering on Channel 1 to 5% of range AGILENT 35670A Supplemental Operator’s GuideFor accelerometers with the same polarity Set up the AGILENT 35670AAGILENT 35670A Supplemental Operator’s Guide For accelerometers with opposite polarityAGILENT 35670A Supplemental Operator’s Guide Set up displaySet up trace coordinates as peak-to-peakmil AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Connect the transducers Preset the AGILENT 35670AAGILENT 35670A Supplemental Operator’s Guide Enter Channel 1 input parametersChoose measurement parameters Set up display parametersAGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Viewing Results Using Real and Imaginary Traces AGILENT 35670A Supplemental Operator’s GuideAssessing Measurement Quality AGILENT 35670A Supplemental Operator’s Guide Preset the AGILENT 35670ASet up Trace B to measure velocity in inch/s 0-pk Press the Y UNITS softkey F8 AGILENT 35670A Supplemental Operator’s GuidePress the Trace Coord hardkey Press the XDCR UNIT CONVERT softkey F4AGILENT 35670A Supplemental Operator’s Guide When the run-upand run-downis completed AGILENT 35670A Supplemental Operator’s GuideSpecify User Levels for Triggering Characterizing the External TriggerCharacterize the Trigger Signal Setting Up External TriggerAcquire and Display the Trigger Signal Set up a non-TTLtrigger as followsSet up measurement parameters AGILENT 35670A Supplemental Operator’s GuideConfirming Contents of 3.5” Disk File Saving Trace to 3.5” DiskAGILENT 35670A Supplemental Operator’s Guide Confirming Contents of NV-RAMSaving Trace to Non-VolatileRAM NV-RAM To return to the Trace viewRecall Trace From 3.5” Disk Recall Trace Data from Non-VolatileRAM NV-RAMAGILENT 35670A Supplemental Operator’s Guide Section 24 Plotting and Printing Trace Data Generating Output with the AGILENT 35670APlotting the Display Check the Plot/Print Destination Printing the DisplayAGILENT 35670A Supplemental Operator’s Guide Plot the TraceSection 25 Importing Plots into Microsoft Word Plot to a File Using the AGILENT 35670A Section 28 Precautions to Prevent Loss of Data Measuring Acceleration, Displaying Displacement Math Functions and XDCR UNIT CONVERT Converting Frequency Response Units to ComplianceAGILENT 35670A Supplemental Operator’s Guide Now display the function F1 on Trace BAGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide above the track numberSection Section