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Manual for ZBL-U5 series of Ultrasonic Detector
line will be possibly judged as head wave; the two dotted
lines above and below base line, as shown in Figure 3.4, are
threshold value lines.
7)
Base line: The approximate straight line in front of head
wave in the waveform. Longitudinally symmetrical central
line of single- channel waveform.
8)
Automatic interpretation line for acoustic time: It is used to
indicate the mark line for ultrasonic system to automatically
test and read acoustic time position of head wave.
9)
Automatic interpretation line for amplitude: It is used to
indicate the mark line for ultrasonic system to automatically
test and read the amplitude position of head wave.
10) Gain: The magnification to received signal by the system.
11) Number of delay points: The number of transmission
starting
single-channel waveform range.
3.5.2 Dynamic waveform operation
1） Adjust gain
Press 【+】 and 【－】 button or slide up and down on waveform
range to increase or decrease gain.
2) Move dynamic waveform
Slide the position of central base line of single- channel
waveform forward and backward or press 【 】 or 【 】buttons to
move dynamic waveform left or right, and consequently, decrease or
increase number of delay points;
3） Automatic search
points
relative
31
to
"0"
point
position
in
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