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ONTENTS
CHAPTER 1 A BRIEF INTRODUCTION TO YUT-2820 ............................................................................ 1
................................................................................................................................................... 1
1.4.1 Power Supply ............................................................................................................................................... 2
1.4.2 Probe Connection ......................................................................................................................................... 3
1.4.3 Switching On and Off the Instrument........................................................................................................... 3
1.4.4 Restore the Initial Parameters of the Instrument .......................................................................................... 3
1.5.1 Functional Keys ......................................................................................................................................... 3
1.5.2 Main Menu ................................................................................................................................................. 4
CHAPTER 2 FUNCTIONS, FEATURES, AND PARAMETERS OF THE INSTRUMENT ..................... 4
....................................................................................................................................... 6
CHAPTER 3 DETAILED OPERATION INSTRUCTIONS ........................................................................ 7
3.1.1 Sound Path ................................................................................................................................................... 7
3.1.2 Sound Velocity ............................................................................................................................................. 7
3.1.3 Displacement ................................................................................................................................................ 8
3.1.4 Gain .............................................................................................................................................................. 8
3.1.5 Compensation............................................................................................................................................... 8
3.1.6 Scale ............................................................................................................................................................. 8
3.1.7 Reject ........................................................................................................................................................... 9
3.1.8 Wave Height Readings ................................................................................................................................. 9
........................................................................................................................................ 9
3.2.1 Waveform Filling ....................................................................................................................................... 10
3.2.2 Color Scheme ............................................................................................................................................. 10
3.2.3 Language .................................................................................................................................................... 10
3.2.4 Lighting ...................................................................................................................................................... 10
3.2.5 Alarming .................................................................................................................................................... 10
3.2.6 Automatic Wave Height ............................................................................................................................. 11
3.2.7 Date ............................................................................................................................................................ 11
3.2.8 Time ........................................................................................................................................................... 11
3.2.9 Parameter Resetting ................................................................................................................................... 11
YUSHI INSTRUMENTS
Contents
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Summary of Contents for YUSHI YUT-2820
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Page 1: Table Of Contents
YUSHI INSTRUMENTS Contents ............................... I ONTENTS CHAPTER 1 A BRIEF INTRODUCTION TO YUT-2820 ................1 1.1 N ..............1 AMES OF THE AJOR OMPONENTS OF THE NSTRUMENT 1.2 K ..............................1 EYPAD 1.3 D ............................. 2 ISPLAY CREEN 1.4 B .................... - Page 2 YUSHI INSTRUMENTS 3.3.1 Pulse energy ............................... 12 3.3.2 Pulse width ..............................12 3.3.3 Damping ..............................12 3.3.4 Broadband ..............................13 3.3.5 Repeating frequency........................... 13 .............................. 13 GATE 3.4.1 Gate A menu ............................... 14 3.4.1.1 Starting of gate A ............................ 14 3.4.1.2 Width of gate A ............................
- Page 3 YUSHI INSTRUMENTS 3.8.3 Storage ............................... 23 3.8.4 Deletion ..............................23 3.8.5 Communication ............................23 3.9 OPERATION OF OTHER SPECIAL FUNCTIONAL KEYS ................23 3.9.1 Automatic gain ............................23 3.9.2 Freezing..............................24 3.9.3 Wave peak memory ............................ 24 3.9.4 Full screen ..............................25 CHAPTER 4 APPLICATION OF TESTING ....................
- Page 4 YUSHI INSTRUMENTS 7.4 M ................... 41 AINTENANCE OF RECHARGEABLE BATTERY 7.5 B ........................41 ATTERIES REPLACEMENT 7.6 R ..............................42 EPAIRING CHAPTER 8 COMMUNICATION BETWEEN THE INSTRUMENT AND THE COMPUTER ..42 8.1 T YUT-2820 OMMUNICATION BETWEEN AND THE COMPUTER AND THE USE OF DATA PROCESSING ............................
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Page 5: Chapter 1 A Brief Introduction To Yut-2820
YUSHI INSTRUMENTS Chapter 1 A Brief Introduction to YUT-2820 1.1 Names of the Major Components of the Instrument The names of the major components of the instrument are shown in Figure 1-1. 1. TFT True Color Display 2. Touch Keypad 3. -
Page 6: Display Screen
During the operation of the instrument, directly press the corresponding menu key, and the relevant menu will be displayed on the screen. There are 6 main menus in YUT-2820; and each main menu consists of several sub-menus, which can be switched through up and down keys among the operation pages. -
Page 7: Probe Connection
YUSHI INSTRUMENTS 1.4.2 Probe Connection When you use YUT-2820, we recommend using our stock probe connecting cable with the appropriate probes. Various types of our standard stock probes can be used directly. The probe should be plugged into the socket upside the instrument. When it is the mode of single probe, the probe cable should be connected to T/R socket;... -
Page 8: Main Menu
YUSHI INSTRUMENTS 1.5.2Main Menu Main Submenu Functions Menu Gain, Compensation, Sound Velocity, Sound Path, Basic Parameters in Basic Displacement, Scale, Reject, Wave Height Readings Detection Waveform Filling, Color Scheme, Language, Alarm, Automatic Basic Functions of the Setting Wave Height, Date, Time, Parameter Resetting,... -
Page 9: Features Of The Instrument
YUSHI INSTRUMENTS and data so as to manage the result of detection on the computer, and generate the flaw detection reports, as well as print out reports 2 independent measurement gates, monitoring the echo amplitude and the sound path distance When using transverse wave to detect flaws, the depths of the second and third waves are automatically calculated according to the slab thickness. -
Page 10: Specifications
YUSHI INSTRUMENTS penetrating power and lower electric noise. ● The voltage of the pulse generator can be changed between 50V to 400V continuously, so that no matter thin plate or hard-penetrated work-piece can be matched with the most fitful probe. -
Page 11: Chapter 3 Detailed Operation Instructions
YUSHI INSTRUMENTS Chapter 3 Detailed Operation Instructions 3.1 Parameter Menu Functions Press to start the menu. 3.1.1 Sound Path On the sound path submenu, you can make the adjustment of the display range, i.e., the frequency of the echo displayed. The range is from 25 to 4500mm. -
Page 12: Gain
YUSHI INSTRUMENTS waveform will move horizontally. The adjustment range is from 0 to 2000mm. On the parameter menu, press (up) or (down) to select the displacement submenu, then （right increase) to adjust the values. press (left decrease) or On the displacement submenu, press OK to adjust the steps. -
Page 13: Reject
YUSHI INSTRUMENTS X Horizontal Distance: the horizontal distance of the sound wave from the point of incidence to the flaw. Y Vertical Distance: the vertical distance of the sound wave from the surface of the work piece to the flaw. -
Page 14: Color Scheme
YUSHI INSTRUMENTS then press (left) or (right) to select off or on. Off refers to enveloping, and On refers to filling. 3.2.2 Color Scheme You can use the function to adjust the colors on the screen. Select the setting menu, then press... -
Page 15: Date
YUSHI INSTRUMENTS 3.2.6 Date On the setting menu, press to activate this function. Press (up) or (down) to select the date submenu. Then press (left) or (right) to set the date. Press Ok to switch among year, month, and day. -
Page 16: Pulse Width
YUSHI INSTRUMENTS 3.3.2 Pulse width Through adjusting the value, the sensitivity and resolution of the echo can be changed. This function aims at matching different probes and getting the highest sensitivity. On the squared ultrasonic wave menu, press (up) or... -
Page 17: Gate Menu
YUSHI INSTRUMENTS submenu, then press (left decrease) or (right increase) to adjust the values: 25Hz, 50Hz, 100Hz and 200Hz. 3.4 Gate Menu The most outstanding feature of the digital flaw detector is the ability to display all the analogue values of echoes on the screen by digital signals. When the instrument is required to compare and compute a signal wave, "human"... -
Page 18: Height Of Gate A
YUSHI INSTRUMENTS to adjust the steps which are divided into 1, 5, and 10. 3.4.1.3 Height of Gate A Select Gate A menu, press (up) or (down) to select the height of Gate A submenu, then press (left) or (right) to adjust the values. -
Page 19: Gate B Menu
YUSHI INSTRUMENTS The vertical distance from the surface The projection distance from the probe of the work piece to the flaw echo in front edge to the flaw echo in Gate A. Gate B The projection distance from the probe... -
Page 20: Mode Of Gate B
YUSHI INSTRUMENTS 3.4.2.4 Mode of Gate B Select Gate B menu, press (up) or (down) to select the mode of Gate B submenu, then press (left) or (right) to adjust the values. Off Turning off the gate, i.e., turning off the alarming and measurement functions. -
Page 21: Probe Zero
YUSHI INSTRUMENTS 3.5.2 Probe Zero There is a certain sound path distance between the probe chip and the coupling surface of the work piece to be detected, thus there will be a sonic time delay. The delay effect can be compensated by setting the probe zero submenus. -
Page 22: Work Piece Thickness
YUSHI INSTRUMENTS 3.5.5 Work Piece Thickness On the work piece thickness submenu, you can set the work piece thickness in the vertical direction of the detection plane. When using angle beam probe, the positioning of the vertical depth of the flaws need this value set. -
Page 23: Dac Echo
However, with the ultra high sensitivity, the crystal interface refection and probe disordered echoes will be high and the near field blind area is enlarged. To solve this problem, YUT-2820 is designed for distance compensation. When the resolving power in the near field is not influenced, only the remote... -
Page 24: Dac Curve Mode
YUSHI INSTRUMENTS significantly. Before using this function, DAC curve should be made first. Select the DAC menu, press (up) or (down) to select the TVG submenu. Then press (left) or (right) to adjust. 3.6.4 DAC Curve Mode YUT2820 can make DAC curve. Customers can choose straight line or curve lint to connect and make DAC curve. -
Page 25: Avg Mode
YUSHI INSTRUMENTS Press “Curve” key for three times to enter into AVG menu. 3.7.1 AVG mode The instrument offers two modes for making AVG curve: bottom and hole. Press “Curve” key for three times to select the AVG menu, press... -
Page 26: Memory Menu
YUSHI INSTRUMENTS change into aperture submenu automatically to set the diameter of the hole. 3.8 Memory Menu Press to enter the memory menu. 3.8.1 Memory Number Select the memory menu, press (up) or (down) to select the memory number submenu. Then press (left) or (right) to adjust the values. -
Page 27: Deletion
YUSHI INSTRUMENTS 3.8.4 Deletion First set the memory number, then select this option, press Ok to confirm, any other key to cancel. If there is a before the memory number, that means the data set is occupied. You can delete the set. -
Page 28: Freezing
YUSHI INSTRUMENTS Note: When the DAC curve has been made, press the automatic gain, the instrument will automatically adjust the compensating gain so as to make the echo inside the gate reach 80% of the screen. The changes of echoes do not mean the changes of DAC curve. However, if the option is on the parameter menu and on the gain option, press the automatic gain, the instrument will adjust the gain automatically. -
Page 29: Chapter 4 Application Of Testing
4.1 Calibration Method and Steps of the Instrument Before you use YUT-2820 to test the work piece, you should first calibrate the instrument: according to the material, size of the work piece to be tested as well as the relevant standards, choose the appropriate test method and probe, set the sound velocity, sound path of the material, set the working frequency and other instrument parameters as well as the probe parameters, and adjust the probe zero. -
Page 30: Operation Steps
YUSHI INSTRUMENTS Keep Calibration block flatwise The thickness is 25mm Figure 4-1 Note: the lower the sound path value is, the more accurate the calibration is. 4.2.2 Operation Steps The instrument requires the echo with an known sound path as the calibration wave of the incident zero. -
Page 31: Measurement Of The Sound Velocity Of The Material
YUSHI INSTRUMENTS adjust the value till the sound path value reaches 25mm. At this point, the probe zero is calibrated, as shown in Figure 4-3. Figure 4-3 4.2.3 Measurement of the Sound Velocity of the Material 1. Set the approximate sound velocity of the material on the sound velocity submenu under the parameter menu;... -
Page 32: Calibration Procedures
YUSHI INSTRUMENTS 4.3.1 Calibration Procedures Set the sound velocity and sound path of the material known on the parameter menu, primary echo is adopted generally. Calibration of the front edge of the probe; Calibration of the zero of the probe;... - Page 33 YUSHI INSTRUMENTS Figure 4-5 4. Calibrate the probe zero: put the probe on the test block and move it till the reflection echo of the hollows of R100mm reaches its highest level. The sound path value will be displayed at the top left...
- Page 34 YUSHI INSTRUMENTS shown in Figure 4-9, or direct press to calibrate the K value automatically. Note: this method is adopted if a probe beyond K2 is used, if a probe below K2 is used, the other side should be adopted, as shown in Figure 4-8, the method is same, and the computing formula is k=(L+K-35)/70.
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Page 35: Making Of Dac Curve
YUSHI INSTRUMENTS There 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 reference reflector is, the more precise the calibration is, but the difficulty of calibration increases correspondingly. -
Page 36: Making Of Avg Curve
YUSHI INSTRUMENTS on the DAC submenu, press to delete this point. 7. The other points can be handled in the same way. The instrument can measure nine point at most. The general order of the test points is (10mm, 20mm, 30mm, 40mm ...). -
Page 37: Chapter 5 Skills Of Using The Instrument
YUSHI INSTRUMENTS completely and adjust gate A start to lock the highest flaw echo. 5. Choose aperture submenu in AVG menu, and set the relative value. It isφ5 in this case. 6. Choose AVG curve submenu in AVG menu to set theφvalue of AVG curve, then press Ok. The instrument makes AVG curve automatically. -
Page 38: Saving And Calling The Instrument Status And The Detection Parameters
YUSHI INSTRUMENTS 5.3 Saving and calling the instrument status and the detection parameters The instrument is able to store 1000 sets of detection status data (including echo waveforms, DAC, etc).Therefore, you can store the detection status data and DAC curves which are calibrated well for different probes or various work pieces into different records, and you can call out the corresponding saved record before detection. -
Page 39: Peak Value Memory Function
Chapter 6 Application and Practice of Flaw Detection This chapter introduces how to use YUT-2820 to test steel plate and welding line. This chapter is based on the flaw detection methods and reports forms authorized by the National Nondestructive Testing Personnel Qualification Test Committee. -
Page 40: The Identification Of Flaws
YUSHI INSTRUMENTS The arrows represent the scan directing Put the probe on the flat-bottom test block, move the probe to find out the biggest echo ofφ5 flat-bottom hole. Press to enter the parameter menu. Use the direction keys to adjust Gain and set the first echo to 50% of the scale. -
Page 41: The Identification Of The Defect Location
YUSHI INSTRUMENTS 50%. The orbit of the probe center is the defect edge. During the process of scanning and detecting, when any above situation occurs, take off the probe and mark the boundary point with a marker pen. Then repeat this until other boundary points are identified. -
Page 42: Operating Steps
YUSHI INSTRUMENTS 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. -
Page 43: Chapter 7 Maintenance And Repairing
YUSHI INSTRUMENTS move parallel the probe to the right, back to the position of the highest wave, and keep moving the probe rightwards parallel till the echo drops to 40%. Then measure the distance from the probe to the left side of the steel plate, and note down as S2. -
Page 44: Environment Requirements
YUSHI INSTRUMENTS 7.3 Environment requirements The instrument should be strictly kept from collision, dust, humidity, magnetic fields and oil or grease. Don’t use anything soluble to wipe and clean the surface of the instrument. 7.4 Maintenance of rechargeable battery The capacity and life span of rechargeable batteries depend on the way they are used. Please use the fast charger attached with the instrument to recharge the batteries. -
Page 45: Repairing
YUSHI INSTRUMENTS 7.6 Repairing In order to get the optimal performance of YUT-2820, and minimize its failure rate, the latest technology and quality components have been adopted. The process quality control and process testing have passed ISO9001 International Quality System Authentication. -
Page 46: Main Functions
YUSHI INSTRUMENTS saved graphs and data to the PC. The client software installed on PC can edit, save or print these graphs and data. Operating steps: 1. Connect the instrument and PC with the communication cable. 2. Press to enter the save menu. Use the up and down keys to select the communication submenu. - Page 47 PC. 4. “Print the flaw detection report”: a. When connected with YUT-2820, download the flaw detecting information graphs and data saved in the instrument to PC. b. Select the data information for print in data interface. Click “Print report” menu. Then click the “print preview”.
- Page 48 YUSHI INSTRUMENTS Appendix I General Flaw Detection Report...
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Page 49: Appendix Ii Terminology
YUSHI INSTRUMENTS Appendix II Terminology This appendix lists the special terms used in ultrasonic nondestructive testing. Knowing the accurate definition of them will help users have a better understanding of this operator’s manual. Flaw: Wrong sizes, shapes, orientations, positions or property which may damage the work-pieces or the incontinuity which fails to meet the acceptance criteria. - Page 50 YUSHI INSTRUMENTS SCR (signal to clutter ratio): the ratio between the ultrasonic signal amplitude and the biggest background noise, generally represented by decibel (dB). Gain: the gaining logarithmic form of the amplifier voltage received by the ultrasonic defectometer, represented by decibel (dB).
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Questions and answers
How much min thickness for steel required for flaw detection
The minimum thickness of steel required for flaw detection using YUSHI YUT-2820 is less than 30mm.
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