MAX II
Bolt Tension Monitor
143
6) Press the
LEFT
and
RIGHT
arrow keys multiple times using the left or
right button wheel to scroll the digit locations.
7) Repeat steps
5 & 6
until the
Step Size
value is correctly displayed.
8) Press the
OK
key to set the
Step Size
and return to the menu screen, or
ESC
to cancel entering the
Step Size
.
9) Finally, press the
MEAS
key to return to the measurement screen and
begin taking readings.
12.5 Gates
The
MAX II
is equipped with 3 gates to accommodate the variety of measurement
mode options. A Gate can also be termed “blocking gate”, as measurements are
only made inside of the boundaries/parameters of a gate. Anything outside of the
gate boundaries are blocked. In the diagram above, the boundaries of the gate are
noted at points (D) & (E). (D) is the start of the gate, and (E) goes to infinity or the
first detection it encounters, which would be the end of the bolt. In the diagram
above, a detection was located at 3”. Note that the signal (A) must have an
amplitude that meets or exceeds the height of the gate (D) in order to detect. (B) is
the baseline at zero and the distance from (B) to (D) is the threshold or sensitivity
level, outlined in the next section.
The diagram to the right above is an example of using the gate to detect on a specific
reflection as shown at (H). If a bolt had a side drilled hole or notch of some kind that
was one inch before the actual end of the bolt, either reflector could be used/selected
for the measurement. In order to use the 4” reflector the gate start position has to be
relocated past the 3” reflector, as shown in diagram above. Finally, by setting the
Summary of Contents for MAX II
Page 2: ......
Page 7: ......
Page 8: ......
Page 54: ...Dakota Ultrasonics 46 Figure 6 Reflection in a bending bolt ...
Page 215: ......
