Measurement Computing eZ-NDT version 6.0.9 - Manual (Page 30)

4- 10 Windows and Menus 878493 eZ-NDT
Edit Menu
Configuration . . .
This menu option is only available at Level 3 operation AND when Data
Acquisition is OFF.
The Configuration window includes three Tabs: Acquisition, Input Channels, and Automation. A
discussion of each follows.
Acquisition Tab
This tab provides a means of setting acquisition parameters and preferences. It includes a means of adding
Company and Part Number association. The 4 left-side panels are self-explanatory and will not be
discussed other than to state that dB is typically used for the Y-axis scale. In regard to the Calculation
panel, FRF is generally preferred for getting data from multiple parts quickly; Spectrum mode should be
used for small numbers of parts, or slower acquisitions.
The Configuration Window, “Acquisition” Tab
Acquisition Parameters Panel
Analysis
Frequency
(Hz) Select the desired Analysis Frequency. This value is the maximum frequency of
interest. The sampling rate will be 2.56 times the analysis frequency. Verify the
maximum frequency response of your probes. Typically, the analysis frequency will
be 20 KHz. [Default: 20 KHz.]
Block Size Select the desired Block size. This value is the number of samples per block of data.
For example, a 2048 Block size contains 2048 data samples and will produce an 800
line spectrum. A larger Block size will provide you with greater data resolution.
However, it will require more time to collect a block of data.
No. of
Averages The number of data blocks used in the NDT analysis. Typically, the number of
averages is set to one.