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eddysun (xiamen) electronic co., ltd.

1. cccccccccccccccccccccccccsccsssssccsssssscsssssscessssscesesssssssssecessssseessseees 19 340 Recover paramotor eaire e ET A iene AE E SO 19 BME a E E E E E T EE A 19 A A a a ree ee ee 20 E ERE O O E ee 21 E E Pr a PU aac 22 SRAM a o 22 Di ocd E E EE AREEN AE O ES tad E EE E E oak EEE EIE ea aac A AE 23 DD OS nia las catas 24 IA E A o mn Sen eee ETE Ieee 24 LAF GU N PR Re Pm rE ERE on RTPI eT MORTON Ra oR Tete EE Teer Pe Tene 25 User Manual of EEC 30S SAITUN DASS td iio 26 SADO VIDAS eones 26 A RO 26 TO CRAIC PO aia pei 27 eT ED AOE AAA A aden EE E E E eee OI 27 EA ES DTI T I A OE 27 EN aR re Ce A rn ne eet eee ET RT eee wae ee PRE One CSE SE eT nS RENT PRET eae 27 SA AS BF S Se ea ene RR A aia 28 RS fA ES AC LO ch PED RAD A UP AWE Pe NELSON TPE ANS TETSU A E AE EP ARNE DET 28 EN ARO A A eR ON RE LO TET RONEN RP eee POE E rr er ae 28 ITAIM UK ONIY Oe eee eC eee ne een RCR N TOEO IIE en rer mere ett errant re 29 SZLO MNK ONIU ON E ico A A 29 TALA US O VA TA A IE 29 TALONES nds 29 4 0 ON SITE INSPECTION EXAMPLES sccsssscsssscsssccsssccsscccsscccssccesscccsscsessccessccesseccssccesscsensers 30 A SOP LINE INSPECTION SS EM aaa 30 Aid DT CONMCCHONM AOL COUIDI anal lt plda 30 E eo Ro 2 QR St Ae 6 8 RRP SPP Pe Re gt RRO STO 2 RSP OIE OPT TE EPO RESON SPORT RAP SRP SON PN ATE 32 A 2 ON
2. All these menus can be transferred conveniently 1 3 Safety and Announcements 1 3 1 Safety terminology The following terminologies may appear in this operating guide A Warning Warning statement point out conditions and actions that may hurt people A Notice Notice statement point out conditions and actions that may damage the equipment and other assets 1 3 2 Matters need to pay attention to Please use dependable external power with reliable quality to avoid electric shock and fire The voltage of external power connected is 220V please make sure the equipment is set earthed Please don t randomly open the outside surface of the equipment and avoid any metal components fall into the equipment Extreme temperature will affect the normal operation of the equipment Please don t let the equipment work under extreme temperature if possible To avoid explosion caused by short circuit please don t put the equipment in a wet and explosive environment Pay attention to the rated value of peripheral devices connected To avoid causing fire or electric shock please take the safety precautions while connecting equipment and its peripheral devices Please ask for details or read this operating guide carefully before Bee ae User Manual of EEC 30S installing and connecting To avoid touching bare circuit please don t operate the equipment without cover board Please shut off the power when there re malf
3. Background Figure 3 7 Properties box The user can set the display characteristics of impedance plane display windows including display windows background three kinds of background that 1s none without any special background square coordinate and polar coordinates the background color etc To avoid the confusion the user should not set the same color Press Ok when the user finishes the setting 3 4 4 Probe calibration Click the item of Probe calibration and get a dialog box See figure 3 8 Ts User Manual of EEC 30S Probe Calibration 51 P1F1 25000Hz2 PREGAIN 25dB DRIVWE 5 Mame a PRE 2 000HZ PREGAIN Pis DRIVE Si OFFSET 80 Figure 3 8 Set drive and gain of probe 99 66 There are four options of frequency pregain drive and offset The user can use mouse or the key of t y to choose parameter and press the key of Page Up Page Down to set the value Preamp has a function of pre amplification which can magnify the signals after the data s collection the collected data is a vector with direction and size Matching is to magnify the signals directly including the defect signals clutters signals So the magnifying degree should not be too great avoiding bringing troubles for the later signals transaction such as filtering After go no go signals have processed by filtering and into invariant signals of X components and Y components So we
4. F means frequency Fl means Frequency 1 Change frequency by Page Up and Page Down S means signal displayed of impedance plane eo ae User Manual of EEC 30S Select the desired display signal Also size of display frame can be changed by using mouse Move cursor to borderline of display frame when the mouse changed to y press left key of mouse to the desired position 3 7 4 Frequency The frequency for the system ranges from 64Hz to 5MHz The choice of frequency depends on the different characteristics of tested product such as conductivity and permeability and the frequency range of eddy current sensors probes The referred frequency 1s the frequency for testing probes that 1s the frequency of probe excitation signals Generally when the testing conditions and the parameters are the same the penetration depth will increases as the frequency decreases with lower testing sensitivity When entering into the testing phase the increase of testing depth will decrease the eddy current density in tested products Therefore the users need to choose a right and most effective testing frequency in accordance with the real size and material of tested products The formula for non ferromagnetic thin wall pipes is where Fo is Optimum Frequency or main detection frequency Hz P is conductivity of tested products microhm cm T is the wall thickness of tubes inch For other materials the choice of testing fr
5. 11 Ratio Y X Ration of gain will adjust to amplifying multiple of Y component and X component on condition that doesn t change gain Ratio of gain is 1 0 means that the amplifying multiple of Y component and X component signal is the same with each other Ratio of gain 1s 2 0 means that the amplifying multiple of Y component is two times that X component We can sis User Manual of EEC 30S adjust the ratio of gain s real size according to size of alarm mode and real amplitude of defect signal The adjusting range of ratio of gain in the system is 0 1 10 0 the step is 0 1 By adjusting ratio of gain the resolving ability of phase can be strengthened We can adjust ratio for further analysis to EC signal On common test condition the ratio is set to 1 0 What we should pay attention to is that when we need to place phase of noise signal to level position the ratio of gain must be set to 1 0 Or the phase of noise signal will have warp in the next test 3 7 12 Clock select There are two kinds of optional clocks inner and outer Inner clock is generated by the crystal oscillator of the equipment while outer clock is generated by the pulse formed by the outer component Under A scan testing we can choose outer clock to measure the tested length which can help us to find the position of defects easily 3 7 13 Start delay Under A scan testing we can set the start delay time to avoid the false alarm caused by the st
6. 200mm away from the ends The chart display signals are showed as Figure 4 8 Figure 4 8 Chart display 8 Mark delay setting set the clock as inner clock The value of Mark delay Length x 45 User Manual of EEC 308S between probe and marker test speed Users can adjust according to the marking precision 9 Other parameters should be revised according to testing signals 4 2 On line inspection system Eddy current testing 1s the most appropriate technology to guarantee the reliability of welding quality based on the advantages of high efficiency high sensitivity and low cost It only requires installing the eddy current inspection system on the welding pipe production line Combined sector probe is used for welding quality inspection only while out through probe can detect both the welding and the pipe body quality It s easy to install with combined sector probe and can get high sensitivity for welding inspection But it has to make sure the welding is right under the sector area of the probe Here we would take the on line welding inspection system with combined sector probe and local magnetizer as an example to show the operation 4 2 1 Connection of equipment Connection of equipment is showed as Figure 4 9 Local magnetic Marking device Equipment Acousto optic cabinet alarm device A r Marking controller Figure 4 9 Connection Bb User Manual of EEC 30S 1 Combined
7. AUTO ERASE 20 1 0 1 0 INNER 10ms 10ms MARK DELAY 10ms MARK DURA 100ms PULSE M 1000 FORMAT mm Parameter window Is gt EDDYSUN E S1 Y i ase display window 6183 4025 23804 Tube No 000001 TTL 0 SUB 0 N 0 POS 0mm Figure 3 2 Screen windows The description of windows lists as table 3 1 Time base display window display the defect signals by the form of time base scanning L the number of tubes alarm rejected N the number of defects for one tube under outer clock the position being tested EDDYSUN brand of manufacturer Table 3 1 TT SU PO Table of wndows _12 User Manual of EEC 30S The main menu includes seven items of File Setting View Alarm and Help The details see table 3 2 Probe calibration Calibrate probe by setting frequency preamp drive and offset Setting Measure amplitude and phase of selected signal Impedance plane to center Pull signals to the center of impedance plane Rotate phase of the current signal by 180 degree ad 500 Alarm Help Information about help Table 3 2 Menu lists After entering into the testing system users will find the main menu on the top of screen as figure 3 3 File Setting View Alarm Help Figure 3 3 Main menu Below is the detailed instruction of main menu 3 3 File While clicking the item of File on the main menu by mouse a box of its submenu will come out on the screen S
8. E Send to manufactory for maintenance igures The driver is damaged E Send it to the manufactory for The instrument is damaged maintenance Poor contact between the probe plug ad ocket A Re link the plug and socket firmly or There exists forceful replace the plug There are interference signals E l l electromagnetism interference B Move the instrument far way from the 3 in the figure when the around the instrument and the source of the interference or improve instrument is at work os probes the hield ndition C Poor earthing and or connecting C Use power decontaminating apparatus D Interference into the power supply A Short time interval between A Restart about 1 5 minutes later after Disorderly characters appear shutdown and start up shutoff 4 lon the screen after bootstrap B The start up disc isn t the system B Replace the system disc and restart disc EEC 30 system disc Send it to the manufactory for C The instrument is damaged maintenance A Interference appears because o The cursor moves itself up Turn off the power supply and re link poor contact between the plug and and down and couldn t move ies the plug and socket Each SOCKEL l 3 5 jaccording to keyboard or interconnecting piece should be firm B Not easy to key the keyboard S l screen appears Useless l Use tools to maintain it s C Forceful interference around the characters when being used l Shutoff and restart
9. ONE INSPECTION SS TEM e E 36 4 2 TCONNCCHON OF COUIDINICNE dd 36 Ai ZF alaimeler SCUING POPE nts PUBS Aen ace Ni th be eas Aeon tee ee E len 37 5 0 COMMON MALFUNCTIONG ccsoccsssccsssccsssccssccssccessccessccessccesscccssscessccessscessccessccesssecssscessseees 41 60 MAINTENANCE cios iaa 42 Ge IVIAIINTEE NAIN CE nar tsatces sacnitee a 42 TZ E PP o o Gusts E eos ance eas naan eames todo e ae eaten ean teas 43 TiO APPEND ua anette A haan 44 APPENDIX 1 FUNDAMEN TA an tada 44 APRENDE 2 EDDY CURRENT PROBE sat 47 APPENDIX 3 MAKE STANDARD SAMPLE AND COMPARATIVE SAMPLE oooococconcconccoonccoonccnoncconnncnnncronncrnnnaronnaronncrnnos 50 APPENDIX 4 AUXILIARY DEVICE OF EC TEST AND THE USES iia aida td 54 11 User Manual of EEC 30S 1 0 GENERAL DESCRIPTION EEC 30S eddy current EC instrument is a new generation of eddy current instrument advanced digital electronic technique and micro technique It can test the internal wall and external wall defects of ferromagnetic and non ferromagnetic metal tube Designed with 2 independent testing channels the equipment can collect both absolute eddy current signals and differential eddy current signals The equipment can be used as two eddy current testers each tester has one channel The frequency range 1s from 64Hz to 5MHz enabling the equipment suitable to be used in department of nuclear energy electric power petr
10. When clicking the item of Setting on the main menu by mouse users will find the quick popup of its submenu on the screen See figure 3 5 wee View Alarm Help Balance position Option Properties Probe Calibration Measure Impedance Plane to Center Impedance Plane 1S0D0eq Rotation Recover Parameter Figure 3 5 Submenu of setting 3 4 1 Balance position Change center point by Home End Page up and Page down The value of Horz and Vert on impedance plan will change when adjusting Press Enter or ESC to change impedance plan window And then set balance center position until all the balance center of impedance plan has been set 3 4 2 Option Click Option a setting box will come out as Figure 3 6 _15 User Manual of EEC 30S Option Mode of Analysis Extended Box Automatic Measurement Mode a Box O Line a Ex tr emm C Vertical Com Amplitude Display While Analyzing imp Value F Volt Value Calibrated Volt 1 Pov 8 al Read EC Data O Read param e HUT Read param Figure 3 6 Option box 3 4 3 Properties Click the item of Properties and get a dialog box on the screen See figure 3 7 16 User Manual of EEC 30S Properties Di Coodinate D Coodinate D3 Coodinate D4 Coodinate de Hone O Hone O Hone O Hone sgu sau sgu squ de Polar de Polar de Polar de Polar Display and background color Imped Line Imped Line 2
11. instrument a A The brightness and contrast The indicator light lights up of the display is too low Tune up he wo Inobs when start upi but there isn t i i B The video line between thejB Re link the lines after checking and any figure displayed on the l l mainframe and the display is turnoff or maintenance in poor contact 5 The figure on the display rolls The frame rate of the display isn tlAdjust the frame rate of the display to up and down fitting make the figure stable _4 User Manual of EEC 30S 6 0 MAI NTENANCE 6 1 Maintenance To ensure the normal operation and avoid disturbance of power supply yawp an exchange cartridge is suggested to connect between equipment and power supply We ll provide the exchange cartridge for you 1f users ask for 1t Move disk drive carefully And 1t should be avoid shake And the environment of using equipment should keep clean and dry or dust and watery gas may enter into equipment and affect performance of it The instrument should be covered with dustproof cover after being used In rainy seasons should frequently turn on 1 2 hour for dissipating humidity In order to protect personal safe and avoid damaging the instrument it s prohibit from opening up the shell or putting hands or tools into the instrument when it is turning on The place where instrument is installed should avoid disturbance of forceful electromagnetism With good earthling de
12. memory point display and delay disappear You can choose the one you need by pressing the key SPACE the key of balancing Press the key can set the eddy current signals to the balancing position and clear the screen Every time the frequency gain or probe is changed users should placed the probe on position of work piece without any defect and then press the key PGUP PGDN key of fine tuning Under non testing state users can press the key to change parameters with step of 1 HOME END key of rough tuning Under non testing state users can press the key to change parameters in 10 steps DEL to test the amplitude and phase of defect signals automatically ES to switch between testing state and non testing state F7 while testing users can press this key to save the collected data the eddy current graphs F9 to clear the EMS memory 11 User Manual of EEC 30S 3 2 Brief Introduction of Screen Windows EH EEC 308 EDDY CURRENT TESTER v3 02 jP File Setting View Alarm Helpq Main menu eE 200028 eoeou Kpn 42 g e Shortcut icons 1 P1F1 25000Hz 25 0dB 0deg S2 P2F1 25000Hz 25 0dB 0deg Impedahce display window Main All Name S1 SIGNAL FREQ HPASS LPASS FILT S2 SIGNAL FREQ HPASS LPASS FILT CHART SPE DISP MODE DISP FACTOR RATIO Y X CLOCK SEL START DELAY END DELAY Value P1F1 25000Hz OFF OFF OFF P2F1 25000Hz OFF OFF OFF 5
13. smooth and regular When the defect signal you got is not smooth and regular wave signal or there re many noise waves which will affect observation to defect signal open the filtering function The range of filtering count out is 1 100 Commonly we suggest you select 3 10 Users can set corresponding value according to field test 3 7 8 Chart speed The strip chart speed is a variable of strip chart scan speed The larger the value is the quicker the scanning speed will be The lower the value is the slower the scanning speed will be The range of strip chart factor is 1 100 Commonly 2 10 will be ok 3 7 9 Disp mode There re three kinds of display mode line display memory Point display real time impedance plan and Auto erase Line display will long keep the collected EC signal on the screen until users press to clear the screen or press blank to clear screen and pullback signal centre to balance point Point display shows size of defect signal by size of departure balance point Auto erase will keep defect signal on the screen some time and then display automatically The time it kept can be changed by adjusting disp factor display factor The large the display factor 1s the longer the signal will be kept on the screen 3 7 10 Disp factor The large the display factor is the longer the signal will be kept on the screen Commonly it s set at the range of 10 30 3 7
14. EDDYSUN EEC 305 USER MANUAL AAB ROA VUVUVVVVVVW atte EDDYSUN XIAMEN ELECTRONIC CO LTD June 2014 User Manual of EEC 30S CATALOG 1 0 GENERAL DESCRIPTION iii is 1 LL L CHARACTERS OF EQUIPMENT add 1 L2 STRUCTURE CEE QUIPMENT sirien te 2 LS SARE TY AND ANNOUNCEMENTS taaan 3 MS BA Y AAA A A 3 13 2 Matters NCCd to Day ATENTO lO ia ta 3 2 0 INSTALLATION AND CONNECTION OF EQUI PMENT ccscsssscsssssssscessccessccessccesscsesees 5 ZT INSTALEATION OF HARDWARE Sada dadas 5 ZTE MOA II ener aan etch aan ta a a et 5 Za 2 COMPONENT OF EOI cda 5 AD BLE TIA eA AA A dao 5 2 14 COMMCCUON OF EQUINA 7 Pe COUN TAT EATON OF SOFTWARES ij diodos 7 3 0 OPERATION cuina siveiuaiaustavdustanatnnbeaeeledniuaieshaveactuesteientareetaiuest 11 3 INTRODUCTION OF FUNCTIONAL KEY sarral adtcada 11 3 2 BRIEF INTRODUCTION OF SCREEN WINDOWS E 12 E E 13 TA LIVE DAT TIMO A A A 14 IZ OPON DATI Ms last 14 DB Tid SIVO FAR MO oia 14 3 CDCI A MO isa 14 3 3 5 Copy image to clipboard Save image AS PG SIUC ccce 15 A IA 15 3AL BANCO Y E AAA A A EO ER ET eo 15 EA GON A A aes athe Pet eal ta oak es sedated eat ta scua te 15 CE RER 0 6 SRN ee ee RE E AA A E A E AN AE E A A E A A E are ee 16 2AA ODE CAMI rd aia sara 17 A ener RE PESO EY EE EP eG SPER Se SD DTN EEN 19 3404 Mpedance piane toten or oen E ad 19 3 4 7 Impedance plane 180Deg OtatlOn
15. UU PUNO AAN EEC 305 Eddy Current Tester Type Name Power Led Hard Disk Led Power Switch Reset Switch Figure 2 1 Front panel of mainframe 2 Back panel of mainframe The front panel of mainframe and introduction is shown as Figure 2 2 he ae 1 UU gt Il cf I Figure 2 2 Back panel of mainframe A Input socket of power supply AC 220V Notice The input rated voltage is AC 220V To avoid suddenness the AC plug must be earthed B Cooling fan of equipment C Power switch 1 means on and O means off D Louver E USB interface F COM2 User Manual of EEC 30S G Printer interface H COM1 I RJ45 interface J VGA interface K Keyboard interface L Exciting interface for D P probe to generate exciting signals M Control interface outer clock and A scan input N Switch of probe I to convert probe form between NORM and D P O BNC socket for probe I B P BNC socket for probe I A Q Switch of probe II to convert probe form between NORM and D P R BNC socket for probe II B S BNC socket for probe H A T Delay alarm output U Real time alarm output V A scan input W Outer clock input 2 1 4 Connection of equipment Step 1 Be sure that the power of mainframe is OFF and the mainframe is firmly grounded Step 2 Connect both power cords of monitor and mainframe Fit the fifteen core cable between monitor and mainframe and connect the keyboard Step 3 Connect the probe and
16. allation Folder The installer wall install EEC 305 to the following folder To install in this folder click Next To install to a different folder enter it below or click Browse Folder C Program FilestEddysuniEEC 3051 Disk Cost Install EEC 305 for yourself or for anyone who uses this computer Everyone O Just me Figure 2 5 Installing paths 5 Press NEXT the wizard 1s ready to begin installation see figure 2 6 i EEC 30S Contirm Installation ad gee 1 a The installer is ready to install EEC 305 on your computer Click Next to start the Installation Figure 2 6 Ready to install the program _Q User Manual of EEC 30S 6 Click Next finally The installation 1s finished i EEC 308 Installation Complete EEC 305 has been successfully installed Click Cloze to exit Please use Windows Update to check for any critical updates to the NET Framework Figure 2 7 Finish installing 10 User Manual of EEC 30S 3 0 OPERATION The equipment adopts a full digital design Users can directly start by turning on the power and double click the program icon See Figure 3 1 Figure 3 1 Icons of EEC 30S 3 1 Introduction of Functional Key ESC to exit from the testing state and back to the state of analysis or to exit from the previous state lt to choose the display mode of the current defect signal There are three display modes linear display
17. ame time to inspect signal that reflect characteristics of work piece under effect of electric magnetic field atest coilis needed For the drive wire and test coil can be two coils with different functions or be a coil with functions of inspiriting and testing When function of coil isn t need to distinguish commonly drive wire and test coil are called by a joint name that is test coil or EC probe 1 Classification and application of EC probe When classify by inducing mode probe can be classified to two kinds parameter mode and transformer mode Parameter coil is also called self induction coil because it s the coil that produce exciting magnetic field and the coil that collect EC signal of work piece For example both differential probe and absolute probe are parameter coils Transformer coil is also called mutual inductor That s because it s formed by two groups coil one is drive wire also called primary coil that produce alternating magnetic field _47 User Manual of EEC 30S The other is secondary coil that collect EC signal For example D P probe is transformer coil When classify by relative position of probe and work piece probe can be classified to three kinds out through probe inter through probe and placement probe 2 Out through probe This kind of probe is test by passing work piece through test coil Because the probe and work piece don t need to touch each other it s easy to achie
18. art of work piece Start delay time Length between probe and transducer test speed The actual time is adjustable according the test conditions 3 7 14 End delay Under A scan testing we can set the start delay time to avoid the false alarm caused by the end of work piece End delay time Length between probe and transducer test speed The actual time is adjustable according the test conditions _ 28 User Manual of EEC 30S 3 7 15 Mark delay Mark delay is used for marker Mark delay time Length between probe and marker test speed The actual time is adjustable according the test conditions 3 7 16 Mark duration Mark duration means the time for marking Users can set this parameter according to their demands 3 7 17 Pulse m This parameter is used under outer clock For example while the input of outer clock is 400 pulses per meter then we set the Pulse m as 400 3 7 18 Format Format of tube number For example if the format is set as the tube number will be recorded from 00001 _29 User Manual of EEC 30S 4 0 On site inspection examples 4 1 Off line inspection system Eddy current off line inspection system is widely used for tube and bar testing with the advantages of high efficiency and low cost The inspection system is different for ferromagnetic material and non ferromagnetic material A magnetized device magnetizer is used to improve the penetration depth and to avoid th
19. automatically mark to position where display abnormal signal When the test system found a signal which has exceeded setting level it will output an alarm signal After the marking equipment received the alarm signal it will automatically drive relative machinery to mark on the corresponding place of tested work piece for example to spray paint or brush painting Marking equipment 5672 User Manual of EEC 30S Marking equipment use 220V alternating current supply Before using it be sure that the two power cords at marking equipment s back and the two AC output power cords of marking controller are connected firmly be sure that they re insulated Then connect the signal line of marking controller and alarm port of equipment Install marking equipment on the back of probe Let muzzle of paint can aim at side face of steel tube the distance is within 5 10CM THE TENDENCY OF THE STEEL PIPE E HARKER MAGENTIC SATURATOR e p E
20. can magnify signals to be convenient for observation in accordance with demands In view of parts of clutters signals can be cleared and the interference signals will be magnified the users should set the parameters in accordance with the size of practical signals and also consider the clutters interference Generally it is advised to adjust frequency matching and probe drive without sinusoidal wavetorm s distortion and saturation The adjustment range of probe drive s parameter values is 1 2 3 4 5 6 7 8 the default value is 5 The user always changes signals amplitude mainly by changing the excitation volt value of sensors Generally for remote eddy current testing it is 5 8 and 18 User Manual of EEC 30S for the conventional eddy current testing it is 5 and for the pen probe testing itis 1 3 Close the box after finishing the setting 3 4 5 Measure Under analysis state click Setting Measure the system will automatically measure the amplitude and phase of selected eddy current signal and show them on the screen In accordance with the options in other option frame the user can choose such display items as screen value volt value and phase Once these options are chosen the corresponding value will display below the impedance plane program 3 4 6 Impedance plane to center If the user click the item of Impedance plane to center the submenu of Setting the system will enable t
21. d by the alternating current from the coil The size phase and flow form of eddy current are affected by the electrical conductivity of the tested workpiece And the opposite magnetic field of EC will make the test coil change 1ts impedance Therefore by testing the change of test coil s impedance we can get the conductivity differences as well as the defects of the tested workpieces 1 Basic conditions for eddy current While the changing magnetic field goes close to the conductor or the conductor moves in the magnetic field eddy current will be generated within the body of the conductor Meanwhile the circulating eddy current will create an induced magnetic field that 1s eddy current field Figure Diagram of eddy current As the above figure 1 shows when alternating currents 1 flow in the loops alternating magnetic fields will be generated around the loops Due to the electromagnetic induction a mutual inductance current will be produced around loops within the tested sample that is eddy current iE The induced magnetic field EC magnetic field HE will change 44 User Manual of EEC 30S periodically according to the original magnetic field H According to the theory of electromagnetic induction induced magnetic field HE will always oppose the change of original magnetic field H That is when the original magnetic field H is increased the induced magnetic field HE will also increase on the opposite direction Vic
22. damage So the guide sleeve is required to fix at the same level as the probe or just a little lower than the probe The guide wheel is placed tightly to the pipe and rotates with the movement of the pipe It s used to make the space of probe and pipe stable and to avoid noise signals caused by the change of the space The space adjusting method the probe and the guide sleeve is pressed on the pipe through 6 8 papers about 0 8mm thick then open the electric current of the local magnetizer the guide sleeve will attract the pipe Fix the probe first then fix the guide wheel tightly to finish 4 2 2 Parameter setting Pull and push the pipe by hand to make sure the space between probe and pipe is suitable Select a sample pipe whose size 1s same with the pipe to be inspected Drill some through holes on the sample pipe according to the related standards Start up the eddy current instrument open the testing software to set the parameters as Be gies User Manual of EEC 30S follows 1 VIEW four impedance plane 2 Other parameters are set as Figure 4 10 Main All Name Value STSIGNAL FF 1 FREQ 10000Hz Fle ae GFF LFASS GFF FILT GFF SASIGHAL Sua FEREG OOOOH PIF aes Cer Las CIR FILT GFF Tms kars s DISP MODE AUTO ERASE DISPFACTOR 20 RATIO YEAR 1 0 1 0 CLOCK SEL INNER STARI DELAY 1 ms END DELAY TOms MARK DELAY TOms MARK DURA 100ms ESE 1000 FORMIA T pn Figure 4 10 Parameters setting The te
23. e magnetic noise for ferromagnetic material inspection Besides a demagnetized device is used to remove the magnetism of tube or bar once it requires For non ferromagnetic material inspection it doesn t need magnetizer and demagnetizer Here we would take the off line inspection system of carbon steel pipe ferromagnetic material as an example to show the operation 4 1 1 Connection of equipment Figure 4 1 Inspection system sketch Feeding bench Sensing element Magnetizer amp probe Pinch roller Demagnetizer Marking device JAU B WN Ra Driving wheel 8 Unaccepted chute 9 Accepted chute The position of each components is showed as Figure 4 1 Connection of accessories 1s showed as Figure 4 2 80 User Manual of EEC 30S Direction of the pipe Magnetic Saturation and Marking device amt Lift Device amp Test Probe a Equipment Acousto optic cabinet alarm device y Reference Probe Marking controller Figure 4 2 Connection 1 Test probe put the appropriate test probe in the magnetizer magnetic saturation device and fix the probe with appropriate guide sleeve Connect the testing probe with the first channel of eddy current tester machine Probe 1A 1B through probe cable Connect the exciting end red of probe to the out end of power amplifier and the in end of power amplifier is connected to the drive end of the tester Connect the reference p
24. e versa This will finally reach a homeostasis of original magnetic field H and induced magnetic field HE Generally speaking induced magnetic field HE will always oppose the change of original magnetic field H to keep relative homeostasis When circular coil carrying current is placed on the defect position of the conductor the eddy current flowing in the conductor will be affected by the defect In other words the electrical conductivity of the conductor is changed where there is a defect this will cause a change in eddy current and a corresponding change in the induced magnetic field HE And it finally destroys the homeostasis of H and HE This variation will cause an immediate feedback signal to the coil that is eddy current signal The eddy current detector will collect analyse and process the signal then display and record it This is the basis of eddy current inspection In fact besides defects other characters of the conductor such as electrical conductivity magnetic permeability or geometrical shape will cause a change in eddy current and generate the feedback signal Therefore eddy current inspection not only can be used to test defect but also can be used to measure the electrical conductivity magnetic permeability and geometrical shape as well as characterize materials 2 Basic structure of EC tester According to the mutual induction theory of electromagnetic effect mutual induction effect will only generate between t
25. ee figure 3 4 me em User Manual of EEC 30S miss setting View Alarm R Save DAT File Open DAT File Save PAR File Open PAR File Copy Image to Clipboard Save Image as JPG File Exit Figure 3 4 Submenu of File 3 3 1 Save DAT file This item enables users to save the eddy current testing data for the later analysis and comparison Users can set the path and the name of the data The format is set automatically as DAT 3 3 2 Open DAT file Users can open eddy current data files which have been saved by clicking the item Choose the path where the file is saved double click the name of the file the data will be showed on the window and can be observed and analyzed 3 3 3 Save PAR file This item enables users to save the eddy current parameters for later use Users can set the path and the name of the parameters The format is set automatically as PAR 3 3 4 Open PAR file By clicking the item users can open eddy current parameters which have been saved without resetting them while needing _14 User Manual of EEC 30S Choose the path where the parameter 1s saved double click the name the parameter will be showed on the window and can be observed and analyzed 3 3 5 Copy image to clipboard Save image as J PG file Users can save the current testing graph on the screen as JPG according to their demands or they can copy the graph to clipboard then use for writing testing reports 3 4 Setting
26. en the testing speed is a little quicker the user can set correspond high pass filtering For scan testing manually the cut off frequency is usually set low For non moving testing the cut off frequency is usually off Commonly the user can also can set it to 0 5 HZ SHZ to filtering disturbance of noise wave 3 7 6 Low pass The function of low pass filter 1s to filtering collected signal whose frequency is lower than setting point It has function of filtering high frequency noise wave For example it can suppress high frequency interfere produced by power supply non uniform of material electromagnetic coupling and other factors The range o flow pass filtering is 0 2000HZ also it can be turn off When the testing speed is a little slower the user can set corresponding filtering point It can have better result when used with high pass filtering Commonly it s set to more than 80 Hz 3 7 7 Filt The main function of filtering is make anomalous and un smooth waveform to regular and smooth waveform According to computational method of FIFO get several adjacent points on each small bit of wave select the average value as the wave value of the point Then discard the point that is at the head of the wave band and then join the next point of 26 User Manual of EEC 30S the wave band to the average value you ll get wave value of the next point Calculate repeatedly you 11 get defect signal that is integrated
27. equency is relatively complicated The general rule is to find the frequency at locations where impedance has the largest change caused by defects in accordance with eddy current signals curves on impedance plane program to find the frequency at locations where the phase angle between the changed impedance caused by defects and interference factor is the largest one Besides the testing should also consider the factors of wall thickness or testing depth conductivity permeability geometrical size and the size of desired defects In practice there exist empirical parameters for different sizes of tested products Therefore the user only needs to run a 25 User Manual of EEC 308 frequency testing appreciably and set an optimal frequency The frequency adjustment can work in accordance with the proposed frequency range on probes the frequency range of normal through probes is 20K 2M but the user can adjust it a bit in accordance with the thickness of tested products for example the user can set the frequency range to be 5K 15K for 3 5MM thick tested pieces and S0K 150K for 1 2MM thick tested pieces The practical adjustment depends on the site demands 3 7 5 High pass The function of high pass filter is to filtering the collected signal whose frequency is higher than setting point It has function of filtering low frequency interfere wave The range of high pass filtering is 0 2000HZ also you can turn it off Wh
28. he center of eddy current signals deviated from the center to be back to the center of impedance plane program automatically 3 4 7 Impedance plane 180Deg rotation Impedance plane 180Deg rotation when the user click Setting Impedance plane 180Deg rotation the system will automatically rotate the phase angle of current eddy current signals on impedance plane program by 180 3 4 8 Recover parameter Parameters back to default settings 3 5 View Click the item of View in main menu with a quick popup of its submenu The contents of the submenu see figure 3 10 Impedance Plane strip Chart 19 User Manual of EEC 30S Figure 3 10 Submenu of View Submenu of View is used for setting the distribution of eddy current signal windows during testing While submenu of Impedance plan is used for setting the numbers of impedance plane program on the same screen and the user can set the corresponding options in accordance with the number of channel and of frequency in practical testing Differently the item of strip chart is used for setting the number of time base scanning lines and scanning direction on the same screen 3 6 Alarm The submenu of Alarm is showed as figure 3 11 MEA Report Help Alarm Mmode Setting Alarm Area Setting Figure 3 11 Submenu of Alarm 20 User Manual of EEC 30S 3 6 1 Alarm mode Select alarm mode the screen will display dial
29. le The standard sample is processed according to relative standard regular and approved by professional origination The standard sample is used to estimate performance of test system Comparative sample is processed according to relative standard regular and approved by professional origination The comparative sample is used to estimate quality of tested _50 User Manual of EEC 30S object OZ ZA TT TAO A Position of pylome on steel tube comparative sample To test defect of stainless steel weld tube the diameter of pylome depends on regular of steel tube dimension When wall thickness of steel tube is lt 3 MM the diameter of pylome should be 1 20MM But when the out diameter is gt 51MM the diameter of pylome should be 1 60MM When wall thickness of steel tube is gt 3MM the diameter of pylome should be 1 60MM But when the out diameter is gt 51MM the diameter of pylome should be 2 0MM The size of pylome s diameter can consult with provider For comparative sample of non ferromagnetic metal tubular product EC test there re corresponding regular The regular is suit to out through probe Comparative sample of copper and copper alloy non sew tube material is as follows Aperture size of weldless tube and copper alloy reference sample tube OD of tubular EED OD of through hole _ A Dess A Ee ee 51 User Manual of EEC 308 Position of pylome on copper pipe comparative sam
30. lock The value of Mark delay Length between probe and marker test speed Users can adjust according to the marking precision Set the clock as outer clock which should work with speed measuring device The line speed can be measured by connecting the device to the motor of the production line or through the rotation of the device For example the mark delay 1s set as T the distance between probe and marking device 1s S meters the pulse number per circle of the out clock device such as optical encoder 1s N and the pipe moves L meters when the motor rotates for a circle the formula 1s as below T N S L 7 Other parameters should be revised according to testing signals _40 User Manual of EEC 30S 5 0 COMMON MALFUNCTIONS Phenomenon of malfunction Settlement Indicator light of disk drivelA The floppy disk isn t system disk IA Replace the system disc and restart lights when start up B Dirty magnetic had ofthe drive B Clean the disc and restart l instrument The disc rotatesiC Damaged disc C Replace the system disc and restart D Send b manufactory br maintenance displays error information E The instrument is damaged E Send to manufactory for maintenance The disk hasn t been formattediA Format the beforehand B Clean the disc and restart It shows error information Dirty magnetic had ofthe drive C Replace the system disc and restart 2 when saving and reading l l A The disc is damaged
31. n the magnetic field Under certain condition magnetic energy in the magnetic field will translate into induced current In EC inspection besides the self inductance there will be mutual inductance between two adjacent coils Magnetic field generated by self inductance current or mutual inductance current will block the increase or decrease of electric current This is the effect of inductance In the same way the obstructive action of capacitor to change of voltage is called captance Inductance and captance are called reactance Generally speaking magnetic material will increase the reactance of test coil while non magnetic material will decrease the reactance of test coil 5 Measurement of EC impedance 46 User Manual of EEC 30S EC test works by measuring the changing value of EC transducer s impedance Z The electrical impedance consists of resistance R and reactance X That is Z R X Figure 3 Impedance diagram Appendix 2 Eddy current probe During testing the condition of work piece is represented by change of EC probe The component which is sensitive to change of magnetic field can be used as EC probe Such as Hall element magneto diode and so on At present test coil is used popularly According to EC test principle probe needs a drive wire firstly on which alternating current will pass and then produce electromagnetic field around the drive wire and in the tested work piece At the s
32. n use direct current supply Inner through magnetic saturation and lifter localized magnetic saturation The red and black post heads on panel of magnetic saturation is input end of positive and negative d direct current supply The red is negative while red is positive The magnetizing current of saturation is adjusted according to effect of magnetization Commonly adjusted about 1A it will meet requirements of test Be sure that the electric current can t be adjusted too high or it will make magnetic saturation fever When use saturation the user should termly check whether guide sleeves has been worn and torn or not Guide sleeves are on the two side of saturation Besides has function of guiding guide sleeve also can protect probe Therefore guide sleeve should be replacing in time if it has been worn and torn When use magnetic saturation during on line test the following problems should be paid 55 User Manual of EEC 30S attention to Q Magnetic saturation should be placed on place that far away from disturbance sources such as flying saw and ratio frequency welding Magnetic saturation need to be waterproof The use method of magnetic saturation is as follows PROBE SLEEVE TEEL TUBE N S aa MAGNETIC SATURATOR O lt DC POWER SUPPLY 2 Marking equipment Marking equipment will
33. o magnify the extent of collected and processed signals by a definite geometrical relation The gain range in this system is averagely 0 96 0DB adjustable with rough adjustment step of SDB and with hairbreadth adjustment step of 0 5DB The adjustment of gain is also be affected by kinds of factors and if the noise allows the user can adjust the gain in accordance with the amplitude values of defect signals of tested products After the setting of alarm frames the user should adjust gain based on the extent value of standard test cylinder s defect signals enabling each defect signal to reach the alarm areas and to be critical locations For ordinary through probe testing gain is set to 10 45DB the practical adjustment depends on the site demands User Manual of EEC 30S 3 7 2 Phase During the eddy current testing changes of frequency will lead to changes of signals phase so the users had better adjust frequency firstly and then adjust phase Besides during the testing different depth of defects in tested products will cause changes of phase angle of eddy current vector point P that is the phase angle of eddy current signals will be linear lag from the surface of tested products to the deeper places in term of penetration depth In the meanwhile phase of noise signals and phase of defect signals will also be some linear lag the user can adjust the size of frequency to enable an angle between phase of noise signal
34. ochemical aviation to test defects and measure wall thickness of tubes and metal components of in service copper Ti Zirconium etc and to test analyze evaluate varieties of ferromagnetic tubes 1 1 Characters Of Equipment Frequency range 64 Hz 5 MHz 2 independent channels Real time memorize multi track eddy current signal Range of gain 0 96dB with step of 0 5dB Phase rotation 0 359 with step of 1 Fast digital analogue electric balance Single two impedance plan and time base scan display Man machine conversation Measure extent and phase of signal automatically replay eddy current signal Digital filtering Configuration analysis function Can match with absolute differential probes such as feed through probe pencil probe etc Non equal amplitude phase amplitude alarm 8 output ports of hardware alarm Store testing program and testing data Automatically display curve of phase defect depth Rectangular coordinates and polar coordinates can be selected Display cross section diagram of in service tube and number of tested tubes at the same screen and eddy current testing signal Graded display cross section diagram of tubes and to form the general picture of eddy current testing of in service tube Graded stat Testing result for further analysis ae User Manual of EEC 308 Automatically display the calendar and time Can be equipped with data analysis system 1 2 Structure Of Equipment The structu
35. og box as figure 3 12 Alarm Mode Setting Alarm mode of Alarm mode impedance plane P P OFF O Phas Aimp HalfPhas Amp O Amp Y value gt Alarm color set Color Alarm window set Screen display Logical output Apply Figure 3 12 Set alarm mode 1 Set alarm mode The equipment provides different kinds of alarm mode OFF Phas Amp Half Phas Amp Amp Y value When you don t want to set alarm just click OFF 2 Set alarm window Every display window can be set 8 alarm windows mostly Click 1 to one alarm zone and click 2 to set two alarm zones The rest may be deduced by analogy 3 Set output of alarm 21 User Manual of EEC 308 Click the logical output to open function of hard ware output when there s EC vector point falls into corresponding alarm zone the corresponding hard ware will output 1 when there s no vector point falls into alarm zone it will output 0 Notes When the hard ware alarm is on the EC alarm signal can output to outer alarm device by passing LTP port such as amplifier and alarm light After setting the above parameters click Apply to confirm 4 Alarm color On the menu of alarm output select screen display to open function of alarm display When signal enter into alarm zone during testing the left down middle and right down side of small pane will display the letter of cur
36. ple Comparative sample of aluminum and aluminum alloy tubular product is as follows A Roundish bottom hole Adopt roundness aiguille with diameter of 10MM and the working depth is 50 e User Manual of EEC 308S B Pylome Its diameter is 1 25 times than wall thickness C Circumferential narrow groove The depth of groove 1s 20 of wall thickness And the width of groove is 3MM D Circumferential wide groove The depth of groove is 20 of wall thickness And the width of groove is 3MM E Single edge defect with axial length of 15MM The circumferential scope is 180 270 The comparative sample of on ferromagnetic tubular product inner through EC test can be divided into type of and type of I The comparative sample of type is as follows A Pylome For tube whose out diameter is lt 20MM aperture is1 3MM For tube whose out diameter is 20MM aperture is 1 7MM The four flat bottom holes which are circumferential distribute The aperture is 4 8MM and the depth is 20 of wall thickness Circumferential external groove cutting with 360 The width of groove is 3 2MM and the depth is 20 of wall thickness Circumferential inner groove cutting with 360 The width of groove is 1 6MM and the A User Manual of EEC 30S depth is 10 of wall thickness The comparative sample of II type is as follows A Pylome For tube whose out diameter is 20MM aperture is1 3MM For tube who
37. ple This kind of test method has the following advantages 1t can discover slow change of outside measurement and slow change of chemical composition Correspond to differential probe we call other comparing probe as absolute probe We classify probe according to different angle What should be pay attention to is that different kinds of probe 1s not paratactic and absolute but crossed and comprehensive For example out through probe contains differential probe absolute probe or D P probe Inner through contains differential probe absolute probe Position probe contains different probe and absolute probe The following 1s shape sketch of different types of probe Out through probe Flat pobe Inner through probe 49 User Manual of EEC 30S dk Special probe for welding line Pen probe Segment probe EC tester is designed according to different objects Aim at different test object the outside measurement of probe and excitation frequency are different All of our probes has label which record information of probe such as type of probe identification number dimension of probe and excitation frequency Appendix 3 Make standard sample and comparative sample The same with other NDT method EC test method estimate and inspect tested object by comparing them with quantity and quality of known samp
38. re diagram of EEC 30S is showed as Figure 1 1 Figure 1 1 Structural diagram 1 Waveform generator multi frequency 2 Tested probe 3 Pre amplification phase sensitive detection 4 Balancing filter 5 Digital phase rotation 6 Adjustable gain amplification 8 Computer EEC 30S can excite testing coil simultaneity using 2 different frequencies After excited by different frequencies different eddy current testing signal will be collected and then by plus minus of vectors and other process to collect desired signal EEC 30S tester is controlled by computer and produce frequency by quartz crystal and produce waveform generator whose frequency doubling can be adjustable through frequency doubler and then to obtain sine wave which is required for exciting Select two different frequencies according to requirements of test after amplified by power amplifier send them at the same time to the exciting coil of tested probe Different eddy current _2 User Manual of EEC 30S signals can be obtained through different testing coils and then enter into different channels And through pre amplification phase sensitive detection balancing filter phase rotation and adjustable gain amplifier The computer will control and calculate the equipment and display the diagram Software is the key section of the equipment The main testing software contains l impedance plane 2 impedance plane and tube sheet display
39. rent eddy current vector which falling into alarm zone 3 6 2 Set alarm area Click alarm the screen will display submenu of it Alarm area can be set for each impedance plan Select signal channel to set alarm area of the corresponding display window Here we take the amplitude phase alarm mode to show the operation The set of amplitude phase alarm can be set after alarm mode has been set For example when the alarm window of alarm mode has been set to 5 then alarm zone of alarm A B C D and E can be set Select alarm window If the user would set alarm area A select A Similarly select B C D to set each size of alarm window After set borderline of alarm window click Save or Apply to all 3 7 Set Parameter All the parameter is showed as follows SAI User Manual of EEC 30S Main Al Mame S TPRECG GAIN FHASE SAPREG GAIN PHASE The following is description of each parameter 3 7 1 Gain Value SUDDHZ PSO 150 SOUDDHZ 5dBb J Figure 3 16 Setting picture of parameter Main All Name ST TSIGHAL FREG HF ASS Pass FILT SA SIGNAL FREQ HFASS LFASS FILT CHART SFE DISP MODE DISP FACTOR RATO YE CLOCK SEL START DELAY END DELAY MARK DELAY MARK DURA PULSESM FORMAT Value EIRT o000HZ GFF GFF IRF eel 5000HZ GFF IRF CFF 3 AUTO ERASE 0 101 0 INNER Toms Toms Toms 100ms 1000 TTT Gain is t
40. robe with the second channel of eddy current tester machine Probe 2A 2B 2 Reference probe put the appropriate reference probe where 1s difficult to touch Select a pipe without flaws and has the same size and same material with the pipe being inspected on the testing line 3 Sensing element the sensing element is to sense the coming and the leaving of the pipe and send appropriate signals to the tester machine which control the start and the finish of the inspection This can help to avoid the big interference signals from pipe ends The sensing element is connected to the control end of the tester machine 4 Acousto optic alarm device fix the alarm device where can be easily seen and heard and connect it to the alarm out port on the tester machine through cable Ol User Manual of EEC 308 5 Marking device the marking controller is connected to the del alarm port on the tester through cable while 1ts AC 220V output 1s connected to the marking device 6 Magnetizer magnetic saturation device connect the constant current source to the black and red terminals on the magnetizer through a red and black line red line to the positive pole of constant current source and black line to the ground the ground of constant current source and its negative pole is shorted Select an appropriate electric current according to the pipe size we suggest 0 5A 2 5A 4 1 2 Parameter setting Select the sample pipe
41. s and phase of defect signals which will not cause wrong alarm Besides after the user s setting the phase of through hole the user can also tell the position of defects and tell whether it is a internal wall defect or a out surface defect from defects signals quickly in accordance with their characteristic of lag Generally speaking for the same size defect compare with eddy current signal of surface defect the amplitude of deep defect s eddy current signal is smaller Also the phase of deep defect s eddy current signal is lagged So 1t needs to analysis and distinguish carefully During the testing the user is advised to adjust the through hole signal to be 40 degree and the adjustment value will be present on the top right corner of impedance plane program Specifically if the user adopts out through probes to testing the defects whose phase is larger than 40 degree will be internal wall defect while if the user adopts inner through probes to testing it 1s quite the reverse The size of defects is distinguished by signals amplitude The phase range in this system is 0 359 degree Left rotate 1 degree Right rotate 1 degree are refined adjustment of phase while Left rotate 10 degree Right rotate Idegree are rough adjustment of phase 3 7 3 Signal Select signal means to change signal displayed by impedance plane P means channel Pl means channel 1 Change number of channel by Home and End
42. se out diameter is 20MM aperture is 1 7MM The flat bottom holes of outer wall surface The aperture is 2 0MM and the depth is 80 of wall thickness The flat bottom holes of outer wall surface The aperture is 4 8MM and the depth is 40 of wall thickness The four flat bottom holes outer wall surface which are circumferential distribute The aperture is 4 8MM and the depth is 20 of wall thickness Appendix 4 Auxiliary device of EC test and the uses 1 Saturation After processing ie Cold draw heat treatment rotary extrusion and jointing the inner of ferromagnetic material would present obvious non uniformity of magnetism Because the noise signal caused by non uniformity of magnetism is larger than response signal of defect it would be difficult to inspect defect On the other hand compare with non ferromagnetic material relative permeability of ferromagnetic material is much bigger than 1 Affect by skin effect the skin depth of eddy 54 User Manual of EEC 30S current will be restricted largely Therefore do magnetic saturation treatment to ferromagnetic material is an efficient method which will eliminate non uniformity of magnetism and improve skin depth of eddy current Two magnetic saturation devices are used commonly during EC test One is magnetic saturation which uses out through probe The other is localized magnetic saturation which using segment probe Both of the two magnetic saturatio
43. sector probe this is a kind of two channel probe Select the appropriate sector probe with right radian and fix it on the local magnetizer The probe is connected to the equipment through the four Q9 plugs Two black Q9 plugs are connected to the Ist channel of equipment Probe A 1B and the two red Q9 plugs are connected to the 2nd channel of equipment Probe 2A 2B The Ist channel is the differential channel and the 2nd channel is the absolute channel 2 Acousto optic alarm device fix the alarm device where can be easily seen and heard and connect it to the alarm out port on the tester machine through cable 3 Marking device the marking controller is connected to the del alarm port on the tester through cable while its AC 220V output is connected to the marking device 4 Local Magnetizer local magnetic saturation device connect the constant current source to the black and red terminals on the local magnetizer through a red and black line red line to the positive pole of constant current source and black line to the ground the ground of constant current source and its negative pole is shorted Select an appropriate electric current according to the pipe size we suggest 0 5A 2 5A 5 Space adjustment the space between probe and pipe is required small enough to guarantee the testing sensitivity the suggest value is 0 5 1mm The guide sleeve is to guide the magnetism into the pipe and to protect the probe from
44. sing rules which are described by the operating guideline and the seal of equipment is integrity After one year manufacturer will still responsible for the maintenance while asks users pay for cost fee of it To prevent the damage caused by the transport the instrument should be packed with original pad and shipping box while sent back for maintenance Therefore the unqualified packing box is disapproval We are not answered for the quality problems causing by unqualified packing box So for further using the original package box and pad should be kept well after the newly purchasing instrument is used When users return equipment to manufacturer please be sure that the material is correct and integral EDDYSUN XIAMEN ELECTRONIC CO LTD Xiamen Head square Add Unit 703 704 NO 23 Wanghai Road Software park Xiamen Fujian China P C 361008 Tel 86 592 2230833 2211133 2233733 2200633 Fax 86 592 2200733 E mail ndtOeddysun com Web site http www eddysun com Beijing office Add A 505 Keji Caifu Centre No 8 Xueqing Road Beijing Tel 86 10 82731103 82736303 82736330 Fax 86 10 82734773 _ 43 User Manual of EEC 308 7 0 APPENDI X Appendix 1 Fundamental The EC test is based on electromagnetic induction the fundamental is When test coil carrying alternating current closes to conductive tested workpiece the conductive tested workpiece will produce eddy current because of the alternating magnetic field cause
45. sting frequency FREQ should be selected according to the material and the thickness of the pipe being inspected The probe is also customized with a tag indicating the frequency range The frequency using should be within the indicated range The high pass HPASS is set according to the testing speed usually the HPASS is set as 0 5 5 Hz for testing speed of 5 10 m min and 2 10 Hz for 10 30m min 5 50 Hz for 30 60 m min 10 100 Hz for 60 100m min Sl is the differential signal channel which can open the HPASS while S2 is the absolute signal channel which should close the HPASS Other settings please find follows 38 User Manual of EEC 30S Set the impedance plane as Sl right click the mouse to choose and set the alarm area as Figure 4 11 ol PIF1 10000 Hz 30 048 Odez Figure 4 11 Alarm area 4 Probe calibration the value for PREGAIN is advised 20 25dB and the value for DRIVE is 5 Make sure the peak of the green sine wave is between the two red lines see Figure 4 12 Probe Calibration Figure 4 12 Preamp amp Drive 5 Put the welding up and test the through drilled holes of the pipe Check the signal of S1 39 User Manual of EEC 308 adjust the gain value and make it at the boundary of alarm area see Figure 4 14 Increase the gain by 2 3dB and adjust the phase value to 40 degree Figure 4 13 Signals of through drilled hole 6 Mark delay setting set the clock as inner c
46. tion the value for PREGAIN is advised between 20 25dB and the value for DRIVE is 5 Make sure the peak of the green sine wave is between the two red lines see Figure 4 5 33 User Manual of EEC 30S Probe Calibration ES Param value Figure 4 5 Pregain amp Drive 5 Concentricity setting let the sample pipe go through the probe at normal testing speed adjust appropriately the electric current for the magnetizer Requirements for the sample pipe manufacture three through drilled holes in the middle of the pipe distributed symmetrically along circumferential direction with distance of 120 5 and not less than 200mm distance along axial direction see Figure 4 6 Figure 4 6 Through drilled holes Test the three holes of the pipe and check the signal size Make the sizes of the three holes same by adjusting the position of the magnetizer the amplitude difference of the three signals should not more than 2dB see Figure 4 7 _ 34 User Manual of EEC 30S Signals of The three holes Figure 4 7 Signals of the three holes 6 Setting of gain and phase S1 adjust the gain value and make the signal of the through drilled hole at the boundary of alarm area see Figure 4 7 Increase the gain by 2 3dB and adjust the phase value to 40 degree 7 Setting of end delay and start delay these two parameters are used to avoid false alarm caused by ends of pipe and to keep the hole signals
47. turn on the power then open the software to test 2 2 Installation of software EEC 30S can work under system of WINDOWS To start testing users just need to double click the short cut of EEC 30S on desktop If the software is damaged please transfer the backup Usually the backup 1s saved in EDDYSUN file under D disk or in our CD dotHetFx40 Full de al Microsoft NET F Mer Microsoft Corpor Figure 2 3 Installation icons _7 User Manual of EEC 30S Please install dotNetFx40_Full_x86_x64 exe software before installing EEC 30S software Below is the detailed operation of installing EEC 30S software 1 Find out the software of EEC 30S EXE from D disk or from CD ROM the icon is showed as figure 2 3 2 Double click the icon of EEC 30S EXE a welcome interface will come out See Figure 2 4 i EEC 308 Welcome to the EEC 305 Setup Wizard LA The installer will guide pon through the steps required to install EEC 305 on your computer WARNING This computer program ls protected by copyright law and international treaties Unauthorized duplication or distribution of this program or any portion of it may result in severe civil or criminal penalties and will be prosecuted to the maximum extent possible under the law Figure 2 4 welcome interfaces 3 Press NEXT to go on it will enter the installing path interface See figure 2 5 User Manual of EEC 30S liar is EEC 308 ESA Select Inst
48. unctions And then ask for the engineer or send the equipment to the manufacturer Heavy vibration and shock to the equipment is forbidden And to avoid sliding please place the equipment in a firm position To avoid distortion and damage to equipment please don t place heavy things on it Please keep the surface of equipment clean and dry Please avoid interference from external strong magnetic field User Manual of EEC 30S 2 0 INSTALLATION AND CONNECTION OF EQUIPMENT 2 1 Installation of Hardware The equipment is designed with full digital and built in computer so control buttons are not required All functions and operations are controlled by software This makes 1t easy to install and debug 2 1 1 Unpacking Be sure the contents of your shipment match all items listed on the packing list and the package 1s in good condition Place the equipment on the suitable place 2 1 2 Component of equipment The equipment mainly consists of mainframe and display Outer components such as mouse printer CD writer and CD ROM can be selected as per user s requirements Equipment has been set up with software system before it is shipped Other softwares are optional as well 2 1 3 Mainframe The mainframe consists of computer EC circuit and correlative control modules 1 Front panel of mainframe The front panel of mainframe and introduction is shown as Figure 2 1 User Manual of EEC 30S PSN UUUUUU OU
49. ve mass high speed and automatic inspection Therefore out through probe is widely used to test surface quality of tubular product with small diameter steel bar and wire tested work piece 3 Inner through probe When test to pipe fittings sometimes the probe should be put into interior of tube This kind of probe is called inner through probe It s suitable with on line test of condenser tube such as titanium tube and copper tube 4 Placement Placement is also called pen probe During testing place pen probe on the surface of tested work piece These kind of probe has characteristic of magnetic field focus and high sensitivity for there re magnetic core within coil This kind of probe is suitable to surface test of all kinds plank stuff 7747 tubular product with large diameter and steel bar Also it can carry out part test to one area of work piece with complex shape When classify by compare mode probe can be classified to self compare mode and other compare mode 5 Self compare probe Self compare probe is also called differential probe which will compare different parts of a tested work piece This kind of probe can suppress change of coil impedance which is caused by slow change of temperature and slow change of work piece s outside measurement It has higher testing sensitivity to little defect _ 4g User Manual of EEC 30S 6 Other compare mode Generally the object that be compared is reference sam
50. vices and shield equipment the interference signals can be prevented effectively It s prohibiting to take instrument apart when the instrument is abnormal First read the operating instructions carefully to check whether the operation method is correct or inquire the agent or the manufacturer about the solution Open the instrument blindly often leads to more troubles Within one year from delivery day of product if the product is found bad quality or can t running normally the manufacturer will free repair or replace equipment on the condition that users observe keeping installing and using rules which are described by the operating guideline and the seal of equipment is integrity After one year manufacturer will still responsible for the maintenance while asks users pay for cost fee of it If you have any question during using equipment please feel free to inquire us by letter or telephone We would try our best to answer you 42 User Manual of EEC 30S 6 2 Storage This product should be placed indoor under the packing condition Its ambient temperature is 20 Cs 50 Cs and the relative humidity can t surpass 85 Also in the air there isn t any injurant that will lead to corrupt Within one year from delivery day of product if the product is found bad quality or can t running normally the manufacturer will free repair or replace equipment on the condition that users observe keeping installing and u
51. whose size is same with the pipe to be inspected Adjust the position of the magnetizer and make sure the sample pipe can go through the probe stably Start up the eddy current instrument open the testing software to set the parameters as follows 1 VIEW four impedance plane 2 Other parameters are set as Figure 4 3 Main All Name Value 3 1 SIGNAL FF 1 FRE 10000hHz nr OFF LPS DEF FILT GFF SA SIGNAL Pore Fre ODDO HZ Ale Sr EF MAS OFF FILT GFF TEAT rE E DISP MODE AUTO ERASE DISP FACTOR 20 RATIO YEA 105 0 CLOCK SEL INNER START DELAY 10ms END DELAY TOms MARK DELAY 10ms MARK DURA 100m5 PULSE 1000 FORMIA T TAARAT Figure 4 3 Parameters setting siro User Manual of EEC 30S The testing frequency FREQ should be selected according to the material and the thickness of the pipe being inspected The probe is also customized with a tag indicating the frequency range The frequency using should be within the indicated range The high pass HPASS is set according to the testing speed usually the HPASS is set between 0 5 5 Hz for testing speed of 3 10 m min and 2 10 Hz for 10 30m min 5 50 Hz for 30 60 m min 10 100 Hz for 60 100m min P1 is the differential signal which can open the HPASS P2 has no signal P3 is the absolute signal which should close the HPASS 3 Set alarm area of each signal channel as Figure 4 4 1 PIF 10000 Hz 30 0dB Oder Figure 4 4 Alarm area 4 Probe calibra
52. wo conductors So the basic postulate of producing eddy current 1s an equipment that can generate alternating exciting current and measure the change test coil probe and tested workpiece conductor Commonly the tested workpiece includes metal tube bar wire and metal components etc Figure 2 is the drawing of basic structure of eddy current equipment US e User Manual of EEC 308 EC equipment Oscillator Exciting Voltmeter Test Work piece conductor gt Move probe Figure 2 Basic structure of EC tester The EC signal obtained by test coil can be expressed by the change of coil s impedance The impedance of coil consists of resistance and reactance 3 Resistance Whether alternating current or direct current passes through conductive material the electric charges have to overcome the resistance R while they are moving in the conductor The resistance of conductive material makes some electric energy translate into heat energy This will cause some energy loss Similarly exciting current flows in the coil or induced current flows in the tested conductor will cause some energy loss as well The amount of lost energy will be various since the electrical conductivity and magnetic permeability differ for different materials 4 Reactance When the current passes through conductor magnetic field will be generated around the conductor Part of electric energy will translate into magnetic energy i

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