![GE MFE DMS 2 Скачать руководство пользователя страница 129](http://html.mh-extra.com/html/ge/mfe-dms-2/mfe-dms-2_operating-manual_128399129.webp)
4. Measuring Thickness
Page 118
DMS 2 Operating Manual
Step 3: The instrument’s delay will be set to the value last
displayed and won’t change until it’s manually adjusted.
If working in the DUAL measurement mode, DELAY can only
be adjusted from the TG Mode:
Step 1: Activate the TG Primary Menu (if it isn’t 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 DELAY. You’ll note
that the A-scan displayed will move to the left or right (Figure
4-12).
Step 4: The A-scan will remain where it’s positioned unless it’s
manually adjusted again.
4.4.5
Purpose of the A-gate and B-gate
As explained earlier in Section 4.4, the A-scan represents
the transmitted sound pulse. The pulse is transmitted
through the material being tested, where it reflects off the
material’s backwall. It’s this returning echo that’s shown on
the display screen.
If an instrument is properly calibrated, the A-gate and B-gate
will be positioned so that the correct returning sound pulse
crosses each gate, allowing the instrument to correctly mea-
sure the thickness of the material being tested. In fact, after
initial setup it’s common practice to lock those features which
adjust the gate position. This avoids inadvertent changes to the
A-scan appearance. Figure 4-13 shows how gates function in
different measurement modes.
Materials that are poor conductors of sound, improper calibra-
tion practices, and other factors can cause the gates (or other
A-scan characteristics) to be improperly positioned.
Содержание MFE DMS 2
Страница 2: ...DMS 2 DMS 2E Operating Manual GE Inspection Technologies Ultrasonics Ident Nr 021 002 151 Rev H ...
Страница 3: ...THIS PAGE INTENTIONALLY BLANK ...
Страница 22: ...1 Getting Started DMS 2 Operating Manual Page 11 FIGURE 1 7 The VIRTUAL KEYBOARD is shown here ...
Страница 94: ...3 Setting Up the DMS 2 DMS 2 Operating Manual Page 83 FIGURE 3 11 An Auto Labeler screen is shown here ...