ACS UK1401, Operation Manual, Page: 23 / 44

Ultrasonic tester UK1401
Operation Manual
23
ACOUSTIC
CONTROL
SYSTEMS
2
Figure 20
To increase the testing quality, try to select the highest possible value of the repetition frequency of the sounding pulses.
However, when inspecting the small items (not exceeding several dozen centimeters) with low attenuation, the ultrasonic
vibrations in the material will not have time to fade completely by the time when the next sounding signal will be sent to the
material, thus it can result in false readings. In that case, the repetition frequency of the sounding pulses should be decreased,
if required, to the minimum value.
2.3.1.6 NORM Option (in the FRONT mode only)
Setting of the rated value duration of the rising edge (front) of the signal.
The permissible value range is from 0.1 to 20.0 µs.
The screen for the NORM option is shown in the Figure 20.