Checkline DFX-7 - Manual (Page 73)

DFX-7
Ultrasonic Flaw Detector
69
7.3 Adjusting the display
This section will cover the procedures for adjusting the viewable range, or area, of
the display, in terms of thickness. A basic overview of this section would be as
follows: Suppose we had a 50” widescreen television set. Assume that you’re
watching the television for rest of this explanation. The left side of the television
screen is considered the Delay for all view options other than B-Scan. In B-Scan
view, it’s called B-Start. Therefore, Delay (B-Start) are identical, with the exception
of the terminology used, and represent the left side of the television screen.
The right side of the television screen is considered the Range + Delay, in all view
options with the exception of B-Scan, once again. In B-Scan view, it would be
considered B-Depth + B-Start. Therefore, the following should be considered:
Delay (B-Start) + Range (B-Depth) = right side of the screen, depending on what
view option is active.
Now, by adjusting the left and right side of the television screen, to control the
viewable area/range, we can zoom in and out of any part of the 50” screen we’d like,
and focus on only the specific areas of the screen we need to. Therefore, if I am
measuring a part, and am only interested in viewing the thickness range/area from
.500” – 1.0”, and I’d like to zoom in a bit to get a close up look at things, I’d set my
Delay (B-Start) to .500” and my Range (B-Depth) to .500”. This would make the left
side of my screen start at .500”, and the right side of the screen at 1.0”.
Setting the Delay (B-Start)
The Delay (B-Start) represents the left side of the display, and can be adjusted to
start at any thickness value within the overall range of the DFX-7. The value the
Delay (B-Start) is set too, is the minimum thickness value that will be displayed on
the screen.
Note: Once the delay is set, it will remain the same for the views: Digits, RF, RECT.
However, in B-Scan view, the B-Start is an independent setting from Delay, and allow
the user to store two independent settings respectively.
The procedures to adjust the Delay (B-Start) are outlined below: