HY-2200 ultrasonic flaw detectorvalveFlaw detection adjustment method
Debugging of double crystal longitudinal wave straight probe:
Turn on the power switch, the switch is on the right side of the machine, press enter to enter.
1.Press the channel key twice to enter the main menu page, press the enter key, and then press enter. When the cursor starts to flash, use + or-to adjust to the state, press enter to confirm, press the channel key once to return; press 2 ( Press the number 2 on the keyboard to select the 2 gate peak value on the screen), press the enter key to enter, and then press enter, when the cursor starts to flash, use + or-to adjust to the mode: peak value, press enter to confirm, and then continue Press the channel key to return to the flaw detection interface.
2. Adjust the sound speed: press the sound speed key, and then press + or-to adjust to 5900m/s
3. Adjust the angle: press the speed key again until the angle word appears on the upper left corner of the screen, press + or-to adjust to 0.0;
4. Adjust the initial deviation: the probe is coated with couplant and placed on a workpiece with a known thickness, and the sound path is adjusted (see A) to display a bottom wave of the workpiece on the middle of the screen, and the highest reflection of a bottom wave Adjust the wave to 80% of the height of the screen (press the gain key repeatedly to switch between the three levels of 0.1db, 2db, 6db, select a level and then press + or-to adjust, you can adjust the waveform on the screen Height), at this time, hold down the probe and adjust the door (see C for method), put the door on the primary wave, press the offset key, adjust with + or-key, and read the Y value to make it equal or close to the thickness Value; the initial offset adjustment is complete.
A. Adjust the sound path method: that is, adjust the detection range.Press the interval key, at this time mm*1 displayed behind the interval at the upper left corner of the screen is fine adjustment, press the interval key again, mm* N is coarse adjustment, and then press + or-to adjust to the appropriate detection range. Displayed in the lower right corner of the screen.
B. Method of adjusting gain: Press the gain button, (press the gain button repeatedly, switch among the three steps of 0.1db, 2db, 6db) to select a certain gear, and then press + or-to adjust.
C. Door adjustment method: (continuously press the door key, switch between the four levels of "door position", "door width", "door height%" and "door height% (DAC door)"), select one of the doors After the parameter, press + or-to adjust. )
5. Place the probe on the comparison test block, select a Φ2 flat-bottomed hole of a certain depth, and adjust the echo height of the hole to 80% of the screen height with the gain adjustment; adjust the pitch to 2-3 times the welding thickness. can.
6. StartValve flaw detection: Do not adjust the gain during flaw detection. After finding the flaw wave, move the probe back and forth to find the highest wave of the flaw. If the height of the flaw wave is higher than 80% of the height of the screen, the flaw is larger than the Φ2 flat-bottomed hole; for example, the height of the flaw wave Below 80% of the height of the screen, the defect is smaller than the Φ2 flat-bottomed hole.