Ultrasonic Flaw Detector DFD30
12
Fine adjustment
Under D-DISPLAY menu, press + or – key directly to realize fine adjustment.
5.2 Setting of a and b GATE
It is used for adjustment of gate settings, including Gate logic, Gate alarm, Gate start, Gate width and Gate height.
Functions of gate during detection:
To monitor whether the job has flaws in the set logic and range, if yes, it will alarm.
To measure the position and size of flaw echo.
DFD30 is equipped with double-gate function: Gate A and Gate B, normally Gate A is used alone for detecting the
workpiece flaw, and the double-gate is usually used in the measuring and calibration of multi-echo, eg. Measuring the
distance between surface echo and first echo during thickness measurement.
Gate B could be open if E to E function is used under menu a Gate and set E to E as on or b-GATE is set on. Under
this condition, Gate B appears on the display.
Under A-Scan mode, press left or right direction key to set a or b GATE.
5.2.1 a START and b START
This functional menu is multipurpose for Start of Gate A and Gate B.
Under a GATE and b GATE, press up or down key to choose a START and b START, press + or – key to make
change.
Notice:
Gate B is independent from Gate A. The three gate parameters: Gate Start, Gate Width and Gate Height can
be adjusted separately without disturbing each other.
5.2.2 a WIDTH and b WIDTH
This functional menu is multipurpose for Width of Gate A and Gate B.
Under a GATE and b GATE, press up or down key to choose a WIDTH and b WIDTH, press + or – key to make
change.
5.2.3 a THRESH and b THRESH
This functional menu is multipurpose for Threshold of Gate A and Gate B.
