136
dataPAC User’s Guide
Chapter 4 - Off Route Analysis with the dataPAC
Meas. Variable
The Measurement Variable parameter allows you to choose how to measure the signal
coming from the transducer. For example, if you have a velocity probe, you can measure
either velocity or displacement.
Unit Text
The Unit Text parameter allows you to select the display units for this measurement. Select
from RMS, Pk, or Pk-Pk.
The list of selections depends on current selections in the previous two parameters:
Transducer Native Units and Measurement Variable. Note that this specifies the text that is
used to label the measurement and applies scaling to data.
Window
The Window parameter specifies the windowing function applied to the time waveform that
is used to compute the spectra. Your choices are: Hanning, Hamming, Kaiser-Bessel, Flat
Top, and Rectangular.
Hardware Range
The Hardware Range parameter sets a maximum range for this measurement. Selecting
Auto Range causes the system to select an optimum range after you press <STORE>.
Generally, it is recommended that you use Auto Range. However, if want to specify a range,
you can select one from the list.
Note: The scaling used to display the measured data is controlled with the display scaling
parameter.
Display Scaling
The Display Scaling parameter controls the scale used to display the measured data on the
vertical axis. Your choices are:
z
Auto Scale - The display scale automatically adjusts to the measured data.
z
Track Hardware Range - Presents the data on the same scale as the hardware range
setting.
z
Fixed display ranges - Select from the list of supported ranges.
Display Update
Select All to display the result of each measurement, or select Limited to display only a
subset of the data as it’s collected. Limited displays require less collection time.
Frequency Span
The Frequency Span parameter, along with Center Frequency, controls the frequency range
of interest for the true-zoom spectral measurement. The Frequency Span defines the
difference between the minimum and maximum frequency for the spectra.
Center Frequency
This parameter, along with Frequency Span, controls the frequency range of interest for the
true-zoom spectral measurement. The Center Frequency defines the midpoint between the
minimum and maximum frequency for the spectra.
Number Avg
Select one (1) if you don’t want averaging. Otherwise, select the number of spectra to be
acquired and averaged together to produce a measurement.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
