MAX II
Bolt Tension Monitor
139
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
Delay
number is correctly displayed.
8) Press the
OK
key to set the
Delay
and return to the menu screen, or
ESC
to
cancel entering the
Delay
.
9) Finally, press the
MEAS
key to return to the measurement screen.
12.4 Gain
The gain, or amplification of the return echoes, can be adjusted over a wide range.
The setting of the gain is crucial in order to obtain valid readings during the
measurement process. Too much gain may result in erroneous measurements, by
detecting on noise rather than the length of the fastener itself. Too little gain may
result in detection on an undesirable section of the waveform. It may also result in a
“peak jump” to another part of the waveform later in time, resulting in measurement
errors. The gain can easily be compared to the volume control of a home stereo
system. If you turn it up too much, you can’t hear the music clearly. If it’s turned
down too much, you can’t hear it at all.
The procedures to adjust the
Gain
are outlined below:
Adjusting the Gain Quickly
1) Press the
UP
and
DOWN
arrow keys using the right button wheel to
increase/decrease the gain value at any time.
The user can also access and adjust the gain from the tabbed menus. However, this
method is more tedious than making the adjustments using the right button wheel
approach. The procedure using the tabbed menus is outlined below:
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: ......
