Dakota Ultrasonics MVX - Manual (Page 71)

MVX High Performance Thickness Gauge
9) Finally, press the MEAS key to return to the measurement screen and
begin taking readings.
Gate 2
The GATE 2 HOLDOFF is only used in the echo -echo mode. Note: The MVX must
be in E-E (echo -echo) mode to be activated. GATE 2 is sometimes called a Hold-
Off or Delay. The function of the GATE HOLDOFF is to prevent the second gate
from triggering on noise associated with ring down of the first echo. The GATE 2
HOLDOFF is visible as the distance from the end of GATE 1 at the first detect, to the
start of GATE 2 as display by the horizontal bars on the display. A further
explanation suggests the HOLDOFF is a time delay that simply extends the end of
GATE 1 further out in time to prevent GATE 2 from starting. This is commonly used
to avoid detecting interface noise or transducer ring down. The diagrams below
provide a visual example of the gates, followed by the procedures to adjust the gates
for different applications:
Adjusting Gate2 using the Hot Menus
1) Press the MEAS key once to activate measure menu items. Press the
MEAS key multiple times to move right and the ESC key multiple times to
move left, until the GATE2 cell is highlighted.