3.4 A-scan Interface Mode
In this mode, users could view the current thickness value and the A-scan
waveform at the same time. The right side of the interface is the specification
adjusting area, in which the specifications can be adjusted and finally solve
various difficult and complicated thickness measuring applications to the
capacity.
3.8 A-SCAN MODE INTERFACE
3.8 -SCAN INTERFACE MODE
1
—
waveform display area
2
—
gate
3
—
material velocity
4
—
the
magnifying selected specification
5
—
measuring point( the first point of
intersection between the waveform and the gate)
6
—
the present thickness
value
7
—
the blank confines 8
—
the beginning coordinate on the screen 9
—
the
specification adjusting area
10
—
the selected specification 11
—
large digits
mode 12
—
specification selection
13
—
battery power
Attention: when the probe and the object are not complete coupled, the font in
the various interfaces are in GREEN, while if they coupled well, in WHITE
color and when the either the upper or lower limited are exceed, the font and
waveforms are displayed in RED color.
In the A-scan interface, press the bottom right button NEXT
to
highlight the value to be adjusted. Then press the direction keys to adjust the
values. Up and down keys are used for small increments, while left and right
for large increments.
GAIN
—
Adjust the amplification of echo signal by instrument to allow
manual increase or decrease in ldB. This function is very useful for the testing
of attenuation materials (like metal cast).
RANGE
—
Adjust the range of waveform that the screen displays. The
waveform can be compressed or spread visually and it’s invisible if the
display range is set incorrectly and the echo waveform is beyond the display
area, however, the testing value can also be read correctly.
DELAY
—
Adjust the starting position of the waveform on the screen. The
waveform will move horizontally adjusting this value, and it’s invisible if the
delay is set incorrectly and the echo waveform is beyond the display area,
however, the testing value can also be read correctly.
BLANK
—
Hide the unnecessary and useless clutter in front of the main waves.
The red line on the bottom of the screen shows the blank confines. The
adjusting blank confines are the present range confines. In the real testing,
wrong measurement due to the material may exist, such as near surface serious
corrosion, AL material, inside defects, uneven component, lamination
structure and so on. While adjusting the gain or gate can solve part of the
problem, but only blank function can avoid the mistake when those clutter
echoes are higher than the bottom echoes.
15
16
3.9 The waveform before blanking 3.10 omit the front noise waves by blanking
