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YUSHI YUT-2800, Руководство пользователя

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YUSHI INSTRUMENTS

 

 

 

35 

Note: S1: the distance between the flaw starting point and the left datum line of the test block 

          S2: the distance between the flaw ending point and the left datum line of the test block 

          S3: the distance between the highest point of the amplitude and the left datum line of the test block 

6.2.1 Operating steps 

According  to  the  adjusting  methods  of  angle  probes  stated  above,  start  the  welding  line  flaw 

detecting  after  the  curved  lines  have  been  drawn.  According  to  the  NB/T47013-2015,  type  in  the 

criterion  of  the  curved  lines  based  on  the  thickness  of  the  workpieces.  (When  6mm  <  T  <40mm,  it  is 

evaluated  as  disabled:  -4dB),  quantification:  -12dB,  evaluation:  -18dB,  surface  compensation  is  +4dB. 

For  testing  easily,  the  gate  can  be  widened  to  avoid  moving  it.  See  the  operating  methods  in  Gating 

Operations.)  After  typing  in  the  criterion,  put  the  probe  on  the  workpiece  to  test  for  scanning  and 

detecting. The directions of the arrow shows the scanning and detecting directions.   

 

 

When  you  find  flaws,  you  should  observe  the  echo  height.  If  the  echo  height  exceed  SL.  Now 

carefully move the probe to find the highest echo. After you find the highest wave, keep the probe steady. 

Now observe the data display area on the screen to get the flaw depth reading 

  x.x, ie, H, as well as 

the area where the wave height is. Use a steel ruler to measure the distance from the probe to the left end 

of the steel plate, ie S3, (measure form the center of the probe, or measure from the left side of the probe, 

then plus 1/2 of the probe width). Observe the data display area on the screen again to get the flaw level 

readings 

  x.x. Use a steel ruler to measure the position of the flaw from the leading end of the probe, 

and  use  the  steel  ruler  to  measure  the  distance  between  the  flaw  position  and  the  axis  of  the  weld,  as 

shown in the above figure. If the measured distance is 3mm, and the flaw is nearer to the axis of a weld 

B (-) side, then record as B3 or -3 (namely to fill 3 in the B column), at this point, the data of the flaw 

peak amplitude is recorded. 

1 

   

 

 

 

 

 

 

 

2 

   

 

 

 

 

 

 

 

3 

   

 

 

 

 

 

 

 

Defect 

 

 

 

Defect 

 

 

 

Left 

Содержание YUT-2800

Страница 1: ...nu 4 CHAPTER 2 FUNCTIONS FEATURES AND PARAMETERS OF THE INSTRUMENT 4 2 1 BASIC FUNCTIONS OF THE INSTRUMENT 4 2 2 FEATURES OF THE INSTRUMENT 5 2 3 SPECIFICATIONS 6 CHAPTER 3 DETAILED OPERATION INSTRUCT...

Страница 2: ...Measuring point 16 3 5 PROBE MENU 17 3 5 1 Dual probes 17 3 5 2 Probe zero 17 3 5 3 Probe K value 17 3 5 4 Front distance 18 3 5 5 Work piece thickness 18 3 6 DAC MENU 18 3 6 1 DAC echo 19 3 6 2 Gate...

Страница 3: ...DECTETION 33 6 1 APPLICATION ON STEEL PLATE FLAW DETECTION 33 6 1 1 The adjustment of testing scope 33 6 1 2 The adjustment of sensitivity 33 6 1 3 the identification of flaws 34 6 1 4 Flaw Evaluatio...

Страница 4: ...e finished entirely by the keypad With the process of the keypad operation the instrument is able to identify various meanings of each key according to different conditions and then to carry out the i...

Страница 5: ...ed through up and down keys among the operation pages The selected menu is highlighted and its value can be adjusted through left and right keys 1 4 1 Power Supply Using AC Adapter Alternating current...

Страница 6: ...detection and data storage press to shut down the instrument 1 4 4 Restore the Initial Parameters of the Instrument If the instrument crashes or some functions are in disorder or the parameters of the...

Страница 7: ...asic functions of the instrument Wave peak memory real time envelopes show the highest wave of the flaws and record the maximum value of the flaws it is helpful to position the flaws precisely and sca...

Страница 8: ...ststrap The nice surface of the casing is antiskid with eroded textures Innovative high power lithium batteries of notebook style Full screen function the echo display area can cover the entire screen...

Страница 9: ...ed freely to avoid unreal signal 2 3 Specifications Working frequency 0 5 15 MHz Detection coverage 0 177 inch Sound Velocity of the Material 0 039 to 0 394 inch s Operation mode pulse echo dual cryst...

Страница 10: ...d work piece The range of adjustment is from 1000 to 9999m s On the parameter menu press up or down to select the sound velocity submenu then press left decrease or right increase to adjust the values...

Страница 11: ...ps are 0 1 1 0 2 0 and 6 0 3 1 5 Compensation Owing to the different degrees of roughness of surface of the detected object and the test block calibrating the instrument in the practical detection you...

Страница 12: ...s function with great caution as it may happen that you suppress echoes from flaws as well In addition some specifications expressly forbid using the reject function 3 1 8 Wave Height Readings Ha The...

Страница 13: ...down to select the language submenu Then press left or right to choose Chinese or English 3 2 4 Alarming You can use this function to set whether there is an alarm On the setting menu press to activa...

Страница 14: ...eters and press Ok to reset the factory defaults If you want to cancel the resetting press any key In the setting menu 10 submenus are displayed on two screens the former five ones on one screen and t...

Страница 15: ...hange the width height and resolution of the echo display the damping can be adjusted On the squared ultrasonic wave menu press up or down to select the damping submenu then press left decrease or rig...

Страница 16: ...can choose Gate A as the current gate Next we are going to introduce the adjustment of the position width and height of the gate based on the current gate Press to activate the gate menu Press it for...

Страница 17: ...nt functions Positive Afferent Echo Alarm In the coverage of Gate A if the echo exceeds the preset gate height and the alarm is on the alarm will sound Negative Echo Loss Alarm In the coverage of Gate...

Страница 18: ...justment range 0 9998mm When you adjust the values you can press Ok to adjust the steps which are divided into 1 5 and 10 3 4 2 2 Width of Gate B Select Gate B menu press up or down to select the widt...

Страница 19: ...n to set the measuring point position of the gate Select the Gate B menu press up or down to select the measuring point submenu Then press left or right to choose the values The peak mode refers to th...

Страница 20: ...t the probe K value submenu Then press left or right to select the probe K value and the probe angle Press up or down to select the value option then press left or right to adjust the value Note when...

Страница 21: ...velocity the echo heights of the reflectors of the same size depend on the distance between the reflector and the probe The distance amplitude curve is made according to different reference reflector...

Страница 22: ...C reference line DAC reference line a curve formed by the peak values of the echoes of the reference points recorded 3 6 4 SL Select the DAC menu press up or down to select the SL submenu Then press l...

Страница 23: ...memory number as the one you need then select the option of call out press left or right When it comes to confirm calling out the file on the screen press Ok to confirm and press any other key to can...

Страница 24: ...Note the wave height after the automatic gain is related to the automatic wave height setting in the setting menu If the automatic wave height is set as a certain value in between 20 80 the wave heig...

Страница 25: ...there emerges a dynamic echo which is higher than the previous static wave displayed the instrument can catch the new echo as the current highest echo displayed Press again to exit the wave peak memor...

Страница 26: ...time delay in the protective components there might be a considerable zero bias which affects the measurement of the the distance accuracy In order to position the flaw to be tested you should make a...

Страница 27: ...und velocity submenu Then press left or right to set the value as 5920m s 3 Put the straight beam probe on the test block and keep good coupling at this point five echoes appear on the screen as shown...

Страница 28: ...point the sound velocity is the sound velocity of the material 4 3 Calibration of the Angle Beam Probe Concerning the contact detection by angle beam probe distance calibration is a must before any d...

Страница 29: ...the probe on the test block and move it till the reflector echo of the hollows of R100mm reach the highest level measure 89mm of the front face of the probe with a ruler at this point the front edge...

Страница 30: ...ure 4 7 till the reflection echo of the circle of 50mm reaches the highest level use a steel ruler to measure L and calculate K value according to k L X 35 30 As shown in Figure 4 9 press to enter the...

Страница 31: ...are many ways to calibrate the angle beam probe the standard test block isn t wedded to the calibration and you can also use a pinhole of known depth to do calibration Theoretically the smaller Figure...

Страница 32: ...lock as an example as shown in Figure 4 10 3 Press the start menu of Gate A to set its position and lock the echo press to let the echo display 80 of the screen automatically when it is the highest wa...

Страница 33: ...cho signal to be measured you can also directly read the sound path the horizontal distance the vertical distance and other values of the echo inside the gate on the screen By setting the gate mode yo...

Страница 34: ...signals will not influence the instrument When you work in an outdoor place you should prepare spare batteries 5 5 Switching the display modes In the normal display mode as shown in Figure 5 1 press...

Страница 35: ...steel plate flaw detection Using straight probe to detect the flawed area is the main application of the instrument for detecting flaws of steel plate which requires operators to identify and quantify...

Страница 36: ...of flaws In the process of flaw detection observe the waveform on the screen to judge the flaws according to the flaw waves and bottom waves According to NB T47013 2015 the following situations can b...

Страница 37: ...tion Identify the defect location by the position of the probe which detected flaws and mark the workpiece Then measure the minimum distance L1 between the left side of the steel plate and the flaw th...

Страница 38: ...the arrow shows the scanning and detecting directions When you find flaws you should observe the echo height If the echo height exceed SL Now carefully move the probe to find the highest echo After y...

Страница 39: ...perate the instrument correctly and safely all operators have to accept formal skill trainings on ultrasonic defectometer operation and study the Operator s Manual carefully beforehand Lacking special...

Страница 40: ...echarge the instrument every two months if it is put aside for a long time for being in undervoltage condition for a long time may cause irrevocable damage to the instrument If the batteries has run o...

Страница 41: ...he appointed after sales service center to have it repaired Under the following circumstances the instrument won t work safely a The instrument suffered from evident mechanical damage For example it w...

Страница 42: ...nstrument and PC with the communication cable 2 Press to enter the save menu Use the up and down keys to select the communication submenu Use right and left keys to turn it on Then the instrument is r...

Страница 43: ...hich meet the searching conditions on PC 4 Print the flaw detection report a When connected with YUT 2600 download the flaw detecting information graphs and data saved in the instrument to PC b Select...

Страница 44: ...YUSHI INSTRUMENTS 41 Appendix I General Flaw Detection Report...

Страница 45: ...o between the maximum and minimum reflection area which can be identified on the screen of ultrasonic defectometer Pulse Repetition Frequency the pulse frequencies produced per second when the impulsa...

Страница 46: ...for evaluating the property and flaw detecting sensitivity of the ultrasonic system Standard test block the blocks whose materials shapes and sizes having been appraised by the authoritative organiza...

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