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What are the main methods of the field detection of the fin tube?
- Jan 26, 2018 -

(1) the delay time t of the acoustic monitor before the field detection is measured to the receiving system. And the correction value of sound time is calculated.

(2) the transmitter and the receiving probe should be synchronized up and down with the same elevation or fixed height difference when measuring.

(3) measurement point is 40cm, when the abnormality and encryption to 20cm.

(4) select the appropriate emission voltage and amplifier gain, and keep the test in the same process.

(5) the time history curve of the received signal is displayed and recorded in real time.

(6) the multiple finned tubes are combined with two sections as a test section, and the multiple sections are detected respectively.

(7) after the completion of each test tube test, the test points should be repeated at random for 10% times. The relative standard deviation should not be greater than 5%, and the relative standard deviation of amplitude should not be greater than 10%.