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Ultrasonic Flaw Detector                                                                                                                                                        DFD30 

 

11 

Fine adjustment: +1 or -1mm 

Under RANGE, press down key. Right now, there are two tri-angle appear. Under this condition, press + or – key to 

realize fine adjustment. 

 

5.1.2 db-STEP 

Press left or right key to enter into BASE SETTING, then press up or down key to choose db-STEP. 

Press + or – key to change from 01db, 02db, 06db and 12db. 

 

5.1.3 MVTEL 

Users are allowed to set the transmission velocity of ultrasonic wave in workpiece. There are two velocities stored in 

main unit. They are: 

3,240m/s   

    0.127 in /µs  

    Sound velocity of transverse wave in steel 

5,920m/s   

    0.233 in /µs  

    Sound velocity of longitudinal wave in steel 

Usera are also allowed to carry our fine adjustment. 

Under MVTEL, press down key. Right now, there are two tri-angle appear. Under this condition, press + or – key to 

realize fine adjustment. 

Fine adjustment: Step is  1m/s   0.0001in/µs 

 

 

5.1.4 D-DELAY 

Users  could  set  the  pulse  shift  during  detection,  via.  D  delay.  By  which,  users  are  allowed  to  adjust  the  starting 

position  for  waveform, as well  as  adjusting the zero point  of  pulse, so as  to make sure that it is at  the surface or a 

starting face inside the workpiece. If the pulse has to be started from the surface of workpiece, D delay must be set to 

0. 

Range:    0-512mm   

Step: 

      1mm 

There are two ways of adjustment, Rough and fine. 

Rough adjustment 

Under D-DISPLAY menu, press down key. Right now, there are two tri-angle appear. Under this condition, press + or 

– key to realize rough adjustment. 

Fine adjustment 

Under D-DISPLAY menu, press + or – key directly to realize fine adjustment. 

 

5.1.5 P-ZERO 

Range:    0-9.99µs 

Step: 

    0.1µs   

There are two ways of adjustment, Rough and fine. 

Rough adjustment 

Under D-DISPLAY menu, press down key. Right now, there are two tri-angle appear. Under this condition, press + or 

– key to realize rough adjustment. 

Содержание DFD30

Страница 1: ...Ultrasonic Flaw Detector DFD30 Operation Instructions Dragon Electronics Co 2015 05 01 ...

Страница 2: ...Calibration of angle beam probe 9 Chaper V Parameter setting 9 5 1 Setting of BASE 9 5 2 Setting of a and b GATE 11 5 3 Setting of PULS 13 5 4 Setting of CAL 14 5 5 Setting of DAC 15 5 6 PK MEM 16 5 7 TRIG 17 5 8 WELD 18 5 9 SET 19 Chapter VI Calibration of straight and angle beam probe 19 6 1 Calibration of straight probe 19 6 2 Calibration of angle beam probe 20 Chapter VII Thickness Measurement...

Страница 3: ...nspection industry When the ultrasonic wave propagates in a job one can detect the defect in it by the influence on the propagation of ultrasonic wave based on the acoustic characteristic demonstrated by the defect in the material Based on this principle by using ultrasonic wave one can measure such defects as crack pinhole and inclusion in such media as metal non metal and composite etc Fig 1 1 B...

Страница 4: ...sitivity leavigns 58dB Reject 0 90 Rectification Positive half wave negative wave full wave and RF Test Mode Pulse echo dual through transmission Power Supply Li battery Charging Time 4 5 hours Continuous Work More than 8 hours Weight 0 42Kg Overall Dimension 141 87 40mm 2 2 Standard Delivery Item Quantity Main unit 1 2 5A 4 2V power adaptor 1 probe connecting cable 1 Straight probe 2 5MHz Φ20mm O...

Страница 5: ... 1 2 3 Optional Accessory Item Different straight and angle beam Different cables Different test blocks Chapter III Preparation 3 1 Overview of Instrument Direction up down left and right Down straight Confirm and fine adjustment Frozen Data Plus Data Minus COPY ...

Страница 6: ...e as the one users turn off last time Turn off Please make sure all data necessary is stored then press power key for about 3 seconds again and main unit turns off 3 2 3 Usage of power supply DFD30 can work with plug in power supply AC DC adaptor or battery The detector uses the power supply to adapter automatically when the power supply adapter is connected In the other hand the detector uses the...

Страница 7: ...veform Notice 1 Bad quality of cables and probes has great impact on the test results Please be sure good condition of cable and probe is used 2 When using dual probe please pay attention to the connecting order of probe otherwise lead to echo power consumption and not right echo display 3 3 Dispaly In detail 3 4 Overall of main menu Main functions of DFD30 are included in functional groups and se...

Страница 8: ...ting DAC curve 7 PK MEM PK MEM ENVLOP SHADOW AGC 80 Advanced function 8 TRIG ANGLE X VALUE MTL THK Setting relative with angle probe 9 WELD WELD W WIDTH W DIST W DISP Advanced function 10 SET HORN BRIGHT UNIT DATE TIME Advanced function Other special functions can be realized by Special Function SF keys The functions of each SF keys are introduced in the following table Special Functions Descripti...

Страница 9: ...n on the instrument and connect the probe with it Under PULS menu set probe as angle probe by pressing Data plus or minus Under BASE menu choose RANGE and set it as 125mm by pressing Data plus or minus choose MTLVEL and set it as 3240m s by pressing Data plus or minus Please prepare a test block model CSK IA and put couplant on it Meanwhile locate probe on the test block press dB or dB key to make...

Страница 10: ...o the material of workpiece and probe s nature The workpiece material will influence the transmission velocity of ultrasonic wave and the character of probe determines the P DELAY Notice In order to set the sound velocity of ultrasonic wave in workpiece and P DELAY please refer to Chapter VI Calibration of Instrument Under A Scan mode press left or right direction key to set a or b GATE 5 1 1 RANG...

Страница 11: ...o realize fine adjustment Fine adjustment Step is 1m s 0 0001in µs 5 1 4 D DELAY Users could set the pulse shift during detection via D delay By which users are allowed to adjust the starting position for waveform as well as adjusting the zero point of pulse so as to make sure that it is at the surface or a starting face inside the workpiece If the pulse has to be started from the surface of workp...

Страница 12: ...thickness measurement Gate B could be open if E to E function is used under menu a Gate and set E to E as on or b GATE is set on Under this condition Gate B appears on the display Under A Scan mode press left or right direction key to set a or b GATE 5 2 1 a START and b START This functional menu is multipurpose for Start of Gate A and Gate B Under a GATE and b GATE press up or down key to choose ...

Страница 13: ...ction menu is for mode of E to E If it is set on GATE b appears on the display and achieves E to E function Under a GATE and b GATE press up or down key to choose E to E press or key to choose on or off 5 3 Setting of PULS Under A Scan mode press left or right direction key to set PULS 5 3 1 TYPE This functional menu is to set probe type PROBE TYPE Set ultrasonic probe If the current probe is an e...

Страница 14: ...icates the min echo height to be displayed Any echo amplitude lower than this height will be neglected and recorded as zero amplitude Parameter range 0 90 Step graduation 1 Under PULS press up or down key to choose REJECT press or key to make change 5 3 3 PRF This model is equipped with an adjustable pulse repetition reate with adjustable settings of 10 25 50 100 250 500 750 and 1000Hz The primary...

Страница 15: ...50mm 5 4 3 a START This setting is the same as a Gate setting Please check 4 2 4 5 4 4 S REF2 This feature offers users setting a reference thickness from 0 to 250mm 5 4 5 b START The setting of b Gate will be displayed here 5 5 Setting of DAC 5 5 1 DAC 3C This feature toggles the DAC feature on off A Distance Amplitude Correction DAC curve is used to configue a variable threshold for the gate usi...

Страница 16: ...s used for adjusting the relative parameters necessary for plotting a DAC curve It includes RL SL and EL curve as well as DAC REF In order to meet the standard for plotting DAC curve in different industries the instrument is equipped with three DAC curves with adjustable offsets which are DAC EL evaluating line DAC SL quantifying line DAC RL reject judging line In addition in order that DAC curve ...

Страница 17: ...n mode press left or right direction key to set PK MEM 5 6 1 PK MEM Peak Memory is used for users to conveniently find out the flaw peak and estimate the flaw accurately 5 6 2 ENVLOP This is especially for Angle beam probe When users move the probe on a workpiece there are multiple echos memorized and main unit makes a line then shows on the screen According to this line users easily find the echo...

Страница 18: ...cal measurement from the index point of the probe to the front of the wedge like the graph below Probe is set to P2 then use 100 minus the distance in horizantal shown on display R100 0 91 0 2 0 6 0 R50 0 P1 P2 P3 Range 0 00 50 0mm Step 0 1mm Under TRIG press up or down key to choose X VALUE press or key to make change 5 7 3 MTL THK It is used to set the thickness of the test material The thicknes...

Страница 19: ...ers to set the width of weld 5 8 3 W DIST This feature offers users to set the distance of weld to the surface 5 9 SET Under A Scan mode press left or right direction key to set SET 5 9 1 HORN This menu is used to set HORN on or off Under menu of SET press up or down key to choose HORN press or key to make change 5 9 2 BRIGHT This menu is convenient for users operate in dark or sunlight places So ...

Страница 20: ...ore users can also do the calibration of probe as what is shown here Straight probe can be calibrated with the following method For example of the standard straight probe which is frequency 2 5MHz diameter 20mm and one test block CSK IA shown below with thickness determinate are needed The operation steps are as following 1 Turn on the instrument and connect with a straight probe 2 Under PULS menu...

Страница 21: ...be as angle probe by pressing Data plus or minus key 3 Under BASE menu set the range as 125mm and sound speed value as 3240m s as well as dB as around 20 4 Put couplant on the surface of the test block and locate the probe on it as shown on the graph above it would be better that the echo is around 80 height of full screen 5 Move gate A start to echo and cover with it 6 Finally under BASE menu cho...

Страница 22: ...r there is an extra function of thickness measurement Its measuring range is from 5 1000mm resolution is 0 1mm 7 1 How to enter thickness measurement Under arbitrary menu of flaw detection press FREEZE key then press COPY again then users have enttered into thickness measurement display Please check below Under this menu press UP or DOWN arrow key to check the wave and thickness value press LEFT o...

Страница 23: ...Instruction light and buzzer There are 3 instructions light on the keyboard called A D R as well as a beeper inside which remind users working condition of this main unit Usage and maintenance of battery DFD30 is equipped with easy movable Li battery The power of battery displays on the right down corner If the power is too low following condition happens white screen or re open or failure in powe...

Страница 24: ...users enter into menu system Light D Instruction for probes Type of probe should be set as dual or thru probe Meanwhile light D shows bright Light R When rejection is more than 00 light R is in bright which reminds users that there is rejection in testing in checking possible flaws Warm notice Instruction light will be bright as following conditions are 1 Power is in shortage or main unit turns of...

Страница 25: ...as of our company for repairing replacing or returning by using the Warranty Card the copy kept by the user himself or the copy of the invoice issued when purchasing the product During the warranty period if one has no way to show the warranty card or the copy of the invoice we will count the warranty period based on the shipping date and the period is one year 3 If any product of our company has ...

Страница 26: ... for expressing information where horizontal base X axis is used for expressing distance or time and the deflection which is vertical to the base Y axis is used to express the amplitude 11 Sending pulse electric pulse added to the energy exchanger for producing ultrasonic wave 12 Time base line horizontal scan line expressing time or distance in type A display fluorescent screen 13 Scan the repeat...

Страница 27: ...ls 31 Gain the log form of voltage amplification of the receiving amplifier of the ultrasonic detector It is expressed by dB 32 Distance amplitude curve DAC a set of curve plotted according to specified condition by three parameters i e distance of the known reflector gain of the detector and size of the reflector that generates echo During the actual detection one can estimate the equivalent size...

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