Checkline DFX-7 - Manual (Page 8)

Dakota Ultrasonics
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F. Scan Bar – Another view of material thickness in a deflection style horizontal
bar. This is a visual tool that would enable the user the ability to see thickness
changes during high speed scans from flaws and pits.
G. Units – The current measurement units being used (English, Metric).
H. Digital Material Thickness Value – Smaller font size when the B-Scan
display view is enabled.
I. Coating Thickness Value – Displays the actual thickness of any coating
adhered to a metallic material surface (PECT Mode), or a coating adhered to a
non-metallic surface (CT Mode).
J. Minimum Material Thickness – Part of the Alarm feature. Displays the
minimum thickness value found during a scan.
K. Maximum Material Thickness – Part of the Alarm feature. Displays the
maximum thickness value found during a scan.
L. B-Scan Display – Cross section view of the material. Provides the user with
graphical view of the opposite/blind surface (i.e. inside pipe wall surface), to
give the user some idea of the condition, or integrity of the material being
tested.
M. RF A-Scan Display – The actual sound wave reflection that is returned from
the detection of the opposite surface of the material being measured. In this
view, the entire sine wave is displayed, showing both the positive and negative
half cycles from the detection/reflection. This view is commonly used to
initially “see the big picture” and make fine adjustments to the scope settings,
prior to selecting another view option.
N. Hot Menu items – We call this menu section our “hot menu”, as these items
are the most commonly adjusted features, requiring quick access from the
user. They can be displayed and scrolled by pressing the MEAS key at
anytime. The ESC key is used in conjunction with MEAS key to reverse the
direction scrolled.
O. Reference Note – When the “hot menu” items are displayed/activated, the
base material thickness value shown at reference point “O”. However, when
the “hot menu” items have been deactivated, the current base material velocity
value is displayed, as shown in reference point “P”. When the “hot menus” are
deactivated, the entire “hot menu” section becomes a multiple measurement
display area, allowing the user to simultaneously view: base material, coating,
and base material minimum/maximum thickness values dynamically, as shown
in reference point “R”.
P. Reference Note – Please refer to “O”, for a detailed explanation.
Q. RECT A-Scan Display – The actual sound wave reflection that is returned
from the detection of the opposite surface of the material being measured. In
this view, only half of the sine wave is being displayed (positive or negative).
This view is commonly referred, and used as a “flaw detection” mode, once
the user made all the necessary adjustments using the RF mode (refer to M).