3.6 Operation of B-scan Interface
3.6.1 B-scan Display
3.15 B scan interface diagram
1-B-scan image display 2-White pointer
3-Red triangle (display the min.
thickness value)
4-The thickness value of the pointer position
5-The
minimum thickness value in B-scan 6-The maximum thickness value in B-scan
7-Erasing the current B-scan images and measurements 8-Enter the numerical
measurement interface 9-Sound velocity 10-The minimum thickness value on
the B-Scan image 11.Parameter display area 12.Gain value
3.6.2 Introduction of B-Scan
UM-5 Series thickness gauge has time-base B-scan function. Move the probe
along the workpiece surface, then the cross-sectional profile of the workpiece
display, use for observe the underside contour of the workpiece.
When remove the probe from workpiece, it could be automatically capture a
minimum value of the B-scan image, and indicate the position of the
minimum by a red triangle. The thickness value of any point in the B-scan
image can be viewed by moving the white pointer.
3.7 Dual-echo (Thru-coating) Mode
Having coating or paint layer on the surface of the workpiece, it will bring
considerable error to the measurement results. UM-5D and UM-5DL have the
echo-echo measurement method, which can accurately measure the actual
thickness of the substrate under the workpiece coating without grinding the
coating and other processes that destroy the workpiece surface. This function
is achieved by measuring two successive bottom echoes of the substrate.
Press
into parameter configuration interface, set the measurement mode
to dual-echo and press
again back to thickness measurement interface.
And then user can measure the thickness through coating.
3.7.1 A-scan Interface in Dual-echo Mode
The menu options on the right side have changed of A-scan interface under
echo-echo mode, added E-blanking option, and canceled GATE option. The
blue strips area indicate the length of echo-blanking when measuring, the
waveform above the blue strips is invalid. See following figure 3.16.
Figure 3.16 A-scan interface in dual-echo mode
1. identification of dual-echo measurement mode
2. Blue arrow indicate the
secondary echo 3. E-blanking
4. Blue line: the length of echo-blanking
5. Red line: the length of initial-blanking
6. Red arrow indicate the first echo
Blanking in the dual-echo mode:
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