Dakota Ultrasonics MMX-7 - Manual (Page 45)

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CHAPTER SEVEN
USING THE DIGITS & B -SCAN DISPLAYS
A key feature of the MMX-7 is the ability to toggle between two different display
options, Digits and B-Scan. The Digits view provides the user with a large digital
readout of the thickness. The Digits view also includes a scan bar features that uses
a bar graph to indicate thickness. The Scan bar can be very handy while scanning a
tank or pipe wall by graphically displaying deflections from pits or internal flaws,
rather than having to constantly watch for changes in the digital readout. Just
another visual tool to alarm the user when something out of the ordinary is detected.
The B-Scan display is also very useful when scanning surfaces and viewing the cross
section of the test material. It provides a convenient way of profiling the blind
surfaces during a scan. The B-Scan display is also equipped with a scan bar
representing the overall thickness. Once again, the scan bar gives the user a visual
indication when a flaw or defect passed over during the scan process. The scan bar
will deflect off of the defect and return back to the overall thickness. Visually, this is
much easier to notice than watching for changes in the digital value displayed.
Note: The following chapter outlines some of the fine adjustment features of the
MMX-7. The MMX-7 has two different display options (Large Digits and B-Scan).
We’ll take a better look at these options in this chapter. Note: In order to recall and
use the new adjustments made to the MMX-7 at a later time, the user must save the
modified settings in one of the setup locations prior to powering off the unit. Refer
page 75 for more information on setups.
7.1 Selecting a Display Option
The following procedure outlines how to select or toggle display options:
Changing Display Options
1) Press the MENU key once to activate the menu items tab. Press the MENU
key multiple times to tab right, and the ESC key multiple times to tab left,
until the DISP menu is highlighted and displaying the submenu items.