Ultrasonic Flaw Detector DFD30
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5.9.3 UNIT
It is selectable between Metric and English.
5.9.4 DATE
This menu offers to record and check time.
Under menu of SET, press up or down key to choose DATE, press down key to move the cursor, + or – key to make
change.
It shows like XX month XXdayXXyear. After confirmation, press up or down arrow key.
5.9.5 TIME
This menu offers to record and check time.
Under menu of SET, press up or down key to choose TIME, press down key to move the cursor, + or – key to make
change.
It shows like XX hourXXminutes. After confirmation, press up or down arrow key.
Chapter VI Calibration of straight and angle beam probe
6.1 Calibration of straight probe
For the convenience of user’s calibration of probe zero point,the function of calibration is built in the gauge. Further
more, users can also do the calibration of probe as what is shown here. Straight probe can be calibrated with the
following method.
For example of the standard straight probe which is frequency 2.5MHz, diameter 20mm and one test block CSK-IA
(shown below) with thickness determinate are needed.
The operation steps are as following:
(1)
Turn on the instrument and connect with a straight probe
(2)
Under PULS menu,set the probe as straight probe by pressing Data plus or minus key
(3)
Under BASE menu, set the range as 125mm and sound speed value as 5920m/s, as well as dB as around 20
(4)
Put couplant on the surface of the test block and locate the probe on it; it would be better that the echo is
around 80% height of full screen
(5)
Move gate A start to echo and cover with it
(6)
Finally, under BASE menu, choose P-ZERO menu through up or down key, make the thicknee value as
100mm by pressing Data plus key as the standard thickness of this test block is 100mm. Meanwhile, the
calibration process is completed.
