4. Measuring Thickness
Page 122 DMS 2 Operating Manual
Step 3:
Press below the selection titled A-WDTH. You’ll
note that the width of the A-gate shown on the A-scan display
screen will increase or decrease (Figure 4-14).
Step 4:
The A-gate width will remain as specified until it’s
manually adjusted.
Adjusting the A-gate Height or Threshold (A-GATE–A-THR)
The height or threshold level of the A-gate is adjustable. This
may be necessary in multi-echo modes because the returning
sound pulse (backwall echo) may be too low in amplitude to
trigger a measurement reading. Use the following procedure to
adjust A-THR.
Step 1:
Activate the TG Primary Menu (if it’s not already
active) by pressing
.
Step 2:
Activate the A-gate Submenu (located in the TG
Primary Menu) by selecting it with
or so that it’s
highlighted. Five selections will appear across the bottom of the
display screen.
Step 3:
Press below the selection titled A-THR. You’ll
note that the height of the A-gate shown on the A-scan
display screen will move up or down (Figure 4-14).
Step 4:
The A-gate height will remain where it’s positioned
until it’s manually adjusted.
Adjusting the B-gate Starting Point (B-GATE–B-STRT)
B-STRT adjusts the starting point of the B-gate. Use the
following procedure to adjust B-STRT.
Step 1:
Activate the TG Primary Menu (if it’s not already
active) by pressing
.
Step 2:
Activate the B-gate Submenu (located in the TG
Primary Menu) by selecting it with
or so that it’s
highlighted. Four selections will appear across the bottom of
the display screen.
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