Nondestructive testing: Why is there no echo in ultrasonic flaw detector?

2. Is the probe mode correct? If the probe is set to dual crystal and a single probe is connected, there will be no echo;

3. Whether the instrument is working in the working state displayed on the screen;

4. Check whether the probe line is normal and whether the contact between the probe and the probe line is normal. The user can use a pair of tweezers (metal) to touch the inner core of the probe seat. If there is noise, the instrument is in good condition.

5. Are the gain, displacement and sound path normal?

6. Is there a high level of inhibition? If so, the inhibition should be reduced to 0;

7. Simple processing method when there is no echo: press the key, then press "9.

"Parameter reset", clear the current channel, then use a new probe line to connect the straight probe, and detect on a well-coupled thin test block. If there is an echo, the parameter setting may be wrong or the probe line contact is poor; if there is no echo, you can use a pair of tweezers to touch it and observe whether there is any clutter; if there is still no echo, contact Youlian Company.