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MITECH MFD500B User Manual

Ultrasonic flaw detector
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MITECH ULTRASONIC
FLAW DETECTOR
MFD500B
User's Manual
MITECH CO.,LTD.
www.mitech-ndt.com

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  • Page 1 MITECH ULTRASONIC FLAW DETECTOR MFD500B User’s Manual MITECH CO.,LTD. www.mitech-ndt.com...

  • Page 2: Table Of Contents

    CONTENTS 1 Introduction................................3 1.1 Features of the Instrument...........................3 1.2 Specifications..............................4 1.3 Instrument Standard Configuration......................5 2 Understanding the Keypad, Menu System and Display................5 2.1 Structure Feature............................5 2.2 Screen Display............................... 6 2.3 Keys and Rotary Knob Features.........................8 2.4 Menus and Functions............................9 2.5 Alarm Lights..............................
  • Page 3 4.24 Scale Setting..............................18 4.25 Fill function..............................19 4.26 Setting the Display Brightness........................19 4.27 Setting the Display Color......................... 19 4.28 Setting the A-Scan Color......................... 19 4.29 Setting the Menu Color..........................20 4.30 Key Sound..............................20 4.31 Date and Time Setting..........................20 4.32 Display the System Information......................21 4.33 Resetting the Instrument..........................21...

  • Page 4: Introduction

    1 Introduction The MFD500B is an advanced digital ultrasonic flaw detector featuring full digital TFT LCD and a host of new features to meet challenging inspection requirements. Combined with powerful flaw detection and measurement capabilities, extensive data storage, it is capable for transfer detailed inspection data to the PC via its high-speed USB port.

  • Page 5: Specifications

    Memory Memory of 100 channel files to store calibration set-ups Memory of 1000 wave files to store A-Scan patterns and instrument settings. All the files can be stored, recalled and cleared. Video Recorder Screen scenes can be captured as movie files. About 2 minutes movie can be saved to the inside memory.

  • Page 6: Instrument Standard Configuration

    Pulse Repetition Frequency ranges from 10 Hz to 1000 Hz  Pulse Energy: Low (300V), Medium (500V) and High (700V) spike pulse.  Damping: 100Ω, 200Ω and 400Ω  Bandwidth (amplifier bandpass ): 0.5 to 15MHz  Gate Monitors: Two independent gates controllable over entire sweep range ...

  • Page 7: Screen Display

    The Main Unit 1.Belt 2.LCD Display 3.LOGO 4. Hooks 5. Menu Keys 6. Alarm LED 7. Power LED 8. Keypad 9. Rotary Knob 10. Product Label 11.Support Pillar Screw 12. Battery Case 13. Power adapter port 14. Battery Switch 15.
  • Page 8 On the second status line, it shows the channel file name, the beam angle and the measured value of the peak echo ( : Sound path. : Projection. :Depth) inside the current selected gate. “A 61.3” means gate mode is single; current selected gate is gate A; and peak echo position: sound path 61.3 mm.

  • Page 9: Keys And Rotary Knob Features

    The status area at the top-right corner indicated shows the system gain and the sound velocity. 2.3 Keys and Rotary Knob Features The instrument is designed to The instrument is designed to give the user quick access to all give the user quick access to all of the instrument’s functions.

  • Page 10: Menus And Functions

    Peak-Hold key turns the Peak-Hold function on and off. Video key starts or stops recording a segment of the display DAC-AVG key selects the menus of DAC/AVG Up Arrow key – Move the cursor up to select the desired function Down Arrow key –...

  • Page 11: Connecting A Probe

    Connect the instrument to the mains socket-outlet using the power supply unit. The plug receptacle is at the top left of the instrument. Push the plug of the power supply unit into the plug receptacle until it snaps into place with a clearly audible click. The PWR LED on the keypad of the instrument will light in green...

  • Page 12: Setting The Material Velocity

    Activate the BASE submenu (located in the BASIC menu) by pressing the menu key below it.

  • Page 13: Selecting A Rectification Mode

    Select the probe model step: Activate the PROBE submenu (located in the CAL menu) by pressing the menu key below it. Select the function item titled PROBE.

  • Page 14: Setting The A-Scan Reject Level

    Three functions will appear down the right side of the display screen. Select the function item titled RECTIFY. You’ll note that there are four options: POS- Shows the positive component of the RF signal  NEG- Shows the negative component of the RF signal but displays it in a positive orientation ...

  • Page 15: Auto Gain Feature

    Change the DB STEP value by repeatedly pressing key or by turning the knob. Note that DB STEP value can be quickly changed by repeatedly pressing the key 4.9 Auto Gain Feature Use the Auto Gain function to automatically set the basic gain, so as to adjust the peak echo inside the currently selected gate to a target height.
  • Page 16 The gate starting point will remain as set, even when width adjustment is made. Coarse adjustment: half of a lattice Fine adjustment: 1 pixel space When the gate exceeds the display range, as shown in right figure, the measured value will be shown as “*”...
  • Page 17 Activate the LOGIC submenu (located in the BASIC menu) by pressing the menu key below it. Select the B-LOGIC function and choose the gate-alarm triggering logic. Turning the Audible Alarm On or Off When a gate alarm is activated, one or more of the following will occur: An alarm indication light on the front of the instrument will illuminate ...

  • Page 18: Setting The Damping Level

    Gate Mode: Single Gate Mode: E-E 4.11 Setting the Damping Level Note: For this model, the parameter is fixed. This function serves for matching the probe. You can use it to adjust the damping of the probe’s oscillating circuit and to consequently change the height, width and resolution of the echo display.

  • Page 19: Probe Delay Calibration

    The function X-VALUE enables you to set the X-Value (distance between the probe’s leading face and probe index/sound exit point) of the probe used. This value is required for the automatic calculation of the reduced projection distance in angle beam transducer operation.

  • Page 20: Selecting Units

    A-Scan window as it is selected. You’ll note that the following styles are available: G1-Ten major horizontal and five vertical divisions, with two major horizontal and vertical divisions.  G2-Two major horizontal and vertical divisions.  G3-No on-screen grid. Only display-edge marks are visible.

  • Page 21: Setting The Display Color

    Select the function item titled BRIGHT. To change the brightness level, Press key or turn the knob. The display brightness will remain at the level last displayed. Note: For the 25% option, the instrument consumes less current and consequently increases the operating time in battery operation.

  • Page 22: Display The System Information

    Once set, the internal clock of the instrument will maintain the current date and time. 4.32 Display the System Information You can enter the INFO submenu to see the software version and the serial number of the instrument. The VERSION and the S/N values are read-only. They cannot be modified by the user.
  • Page 23 Select a new channel and clear that channel (MEM→CHANNEL→FILE). Set PROBE type to STRAIGHT. Set RANGE TO 300 mm. Set the known material velocity of 5920 m/s in VEL. Set the gate so that it is positioned on the first calibration echo (from 225 mm).

  • Page 24: Calibration With Dual-Element (Tr) Probes

    Press key when CAL is selected to carry out the calibration. The valid calibration is briefly confirmed and carried out. Save the calibration result to current channel file. 5.2 Calibration with Dual-Element (TR) Probes Dual-element (TR) probes are especially used for wall thickness measurement. The following peculiarities must be taken into account when using these probes: Echo Flank.
  • Page 25 When displayed, the DAC curve visually represents a line of constant reflector peaks over a range of material depths. A new feature of the instrument is a multiple-curve option that displays three dB offset DAC curves simultaneously. Each curve represents constant reflector size at varying material depth.
  • Page 26 When complete select FINISH and press key and follow the on-screen prompts to finish the editing. Creating DAC Offset Curves When operating with DAC turned on, three DAC curves including RL, SL and EL are typically displayed. The three curves can be offset from the original DAC curve (ML) by a user-inputted amount.

  • Page 27: Measuring With Dgs/Avg

    Echo Evaluation with DAC In order to be able to evaluate a flaw indication by means of the DAC, certain conditions must be met. The DAC curve must already be recorded.  It only applies to the same probe that was used when recording the curve. Not even another probe ...
  • Page 28 Select the AVG submenu, then the PROGRAM function. Turn the knob to start the AVG program. When AVG program is triggered, “AVG” appears indicating the point index on the top right corner of the display. Couple the probe to the known standard, capture the reference flaw so that its reflected echo is displayed on the instrument’s A-Scan, and adjust selected Gate’s starting point to ensure that the...

  • Page 29: Curved Surface Correction

    This is shown in right figure. Note that the ERS is Φ2.0mm. 5.5 Curved Surface Correction When using angle beam transducers on a Flaw Depth curved surface the instrument will calculate the surface distance and depth of defect, taking into account the internal or external radius.

  • Page 30: Crack Height Measuring Feature

    Apply couplant and couple the probe to a suitable reference test standard. Ensure that the A-Gate is positioned over the desired echo. Then adjust the gain until the peak of the desired reference echo reaches 50% of full screen height (FSH). Note that if the echo’s peak amplitude does not fall between 47.5% and 52.5%, the inputted point will not be accepted.

  • Page 31: Peak Hold Feature

    5.9 Peak Hold Feature When PEAK HOLD is activated, the echo with the highest amplitude in the selected gate becomes the reference echo displayed statically on the screen additionally to the live A-Scan. And the icon will appear on the top-left of the display.
  • Page 32 After the weld parameters have been correctly set, the weld figure will appear on the screen. Apply the setting parameters and return to the main screen when the setting completed. Find out the peak echo from the flaw and position the gate over the peak echo.

  • Page 33: Coded Echo Color

    5.12 Coded Echo color This feature helps to locate the flaw position. To use this function, Input the THICK value according to the thickness of the part. Switch ECHO COLR to ON by means of turning the knob. 5.13 Data Storage The instrument is equipped with a data-storage system.

  • Page 34: Maintenance And Care

    This makes each one of your tests reproducible. You will find the following functions: Channel STORE To store instrument settings in a channel file follow this procedure Activate the CHANNEL submenu (located in the MEM menu) by pressing the menu key below Select the function item titled FILE.

  • Page 35: Care Of The Batteries

    (no methyl alcohol). Attention: Do not use any methyl alcohol, solvents, or dye penetrated cleaners! The plastic parts can be damaged or embrittled by these. 6.2 Care of the Batteries Capacity and life of batteries mainly depend on the correct handling.

  • Page 36: Appendix

    Appendix Appendix A: Charging the Batteries The approximate level of remaining battery life is visually displayed by the battery indicator. When fresh batteries with full capacity are installed, the icon will appear as . As the battery life is consumed, the icon will begin to “empty”.

  • Page 37: Appendix B: Menu Structure

    Appendix B: Menu Structure BASIC FUNC BASE RANGE PROBE PROBE FUNC AUTO FILE GRID PROGRAM PROGRAM FREQ ENVELOPE STORE FILL RECORD RECORD D-DELAY DIAMETER PEAK HOLD RECALL UNITS FINISH ADJUST X-VALUE CLEAR SCALE LINE TYPE FINISH GAIN GAIN PDELAY...
  • Page 38 User Notes Warranty： The product is guaranteed for two year since purchased. Log www.mitech-ndt.com or follow our company official public platform to register for maintenance. Please fill the blanks as required, if the product is not registered for maintenance, it will follow the date of manufacturer.

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