Dakota-ultrasonics MVX User Manual

OPERATION MANUAL DAKOTA ULTRASONICS MMVVXX Visual A / B Scan Thickness Gauge P/N P-149-0002 Rev 1.10, January

Dakota Ultrasonics 6 Known Thickness Sometimes the sound velocity of a material is not known. In this case a sample with a known thickness can be use

Dakota Ultrasonics 96 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right and the ESC key mult

MVX High Performance Thickness Gauge 8) Use the CLR key to backspace if necessary. 9) Repeat steps 6 - 8 until the Comments are completed. 10)

Dakota Ultrasonics 98 The user may have transferred grid templates from a PC to the MVX, or setup grids using the MVX at an earlier time. The name of

MVX High Performance Thickness Gauge 5) Press the ENTER key to activate the confirmation screen. 6) Press the OK key to load the grid from mem

100 CHAPTER ELEVEN SETUPS – CREATE, STORE, EDIT, & RECALL 11.1 Introduction to Setups Often times, users are faced with a variety of tasks and

MVX High Performance Thickness Gauge Opening a Setup 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple t

Dakota Ultrasonics 102 5) Press the ENTER key to activate the confirmation screen. 6) Press the OK key to load the setup from memory. 7) Press the

MVX High Performance Thickness Gauge Saving the Setup 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple

Dakota Ultrasonics 104 5) When the parameter to edit is highlighted, press the ENTER key to activate the Alpha Edit Box. 6) Use the UP, DOWN, LEFT, a

MVX High Performance Thickness Gauge 12) Press the OK key to activate the confirmation screen. 13) Press the OK key to save the Setup, or ESC to

MVX High Performance Thickness Gauge 3) Use the UP and DOWN arrow keys to scroll through the sub menu items until ONE POINT is highlighted. 4)

Dakota Ultrasonics 106 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right and the ESC key mu

MVX High Performance Thickness Gauge CHAPTER TWELVE USING THE FLAW MODE FEATURE 12.1 Introduction to Flaw Mode The Flaw Mode feature was added t

Dakota Ultrasonics 108 12.2 Flaw Mode View Flaw Mode View Refer to the diagram above. The grey grid line, point (A), corresponds to 100% FSH (F

MVX High Performance Thickness Gauge modification. Also, an accessory dual lemo to single microdot cable is available from the factory. The pro

Dakota Ultrasonics 110 detected. In order to clear the peak hold carrot location and start another scan, the CLR key must be pressed. When pressed,

MVX High Performance Thickness Gauge CHAPTER THIRTEEN USING THE UTILITY SOFTWARE 13.1 Computer System Requirements DakView 3 will run on many di

112 APPENDIX A - VELOCITY TABLE Material sound velocity in/us sound velocity m/s Aluminum 0.2510 6375 Beryllium 0.5080 12903 Bra

MVX High Performance Thickness Gauge Tin 0.1310 3327 Titanium 0.2400 6096 Tungsten 0.2040 5182 Uranium 0.1330 3378 Water 0.0580

APPENDIX B - SETUP LIBRARY Num Name Comment 1 Gn/AGC Velocity 1 STEEL BASIC 45 0.2330 in/uSec 2 STEEL THRU PNT STD ¼ 5MHZ HD 15

MATERIAL SAFETY DATA SHEETN/A = not applicable or not available (To comply with 29 CFR 1910.1200)SECTION 1 – PRODUCT IDENTIFICATIONProduct Name: SOUND

Dakota Ultrasonics 8 Basic Material Type If the material velocity is unknown, and a sample thickness cannot be taken from the material, the user may o

MVX High Performance Thickness Gauge 2.3 Measure The MVX is now ready to measure. There are four different measurement view options, each with a

Dakota Ultrasonics 10 DIGITS: Displays the digital thickness value using a larger font size. This view is useful when the MVX is being used as a bas

MVX High Performance Thickness Gauge 2) Press the ENTER key to display the digits edit box. 3) Press the UP and DOWN arrow keys to scroll the h

Dakota Ultrasonics 12 B-SCAN DIGITS In the upper left corner of each of the mode photos above, is the repeat

13 CHAPTER THREE KEYBOARD, MENU, & CONNECTOR REFERENCE 3.1 Menu Key (Operation & Sub Menus ) The Menu key activates the primary

Dakota Ultrasonics 14 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right, and the ESC key mult

MVX High Performance Thickness Gauge Flaw Mode: Activates the flaw detection mode and view. This feature is for use with single element angle b

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Dakota Ultrasonics 16 3.5 TUNE – Menu Gain: Increases or decreases the overall amplitude of the signal. Much like turning the volume up or down

MVX High Performance Thickness Gauge 3.7 SETUP – Menu Open: Displays a list of factory and user defined setups currently stored in memory.

Dakota Ultrasonics 18 Auto Find: Automatically locates the detection point if the measurement is out of the viewable display area. Refer to page 74

MVX High Performance Thickness Gauge 3.12 MEAS (measurement mode) Key The MEAS key puts the MVX into it’s primary mode of operation. In this

Dakota Ultrasonics 20 Alternatively, the delay, width, gain, and threshold hot function fields can be changed using the Digit Edit Box as follows: 1)

MVX High Performance Thickness Gauge 3.16 ENTER key The ENTER key is used in the overall menu selection process, to activate list and edit bo

Dakota Ultrasonics 22 Transducer Connectors Refer to Diagram: The transducer connectors, and battery cover/probe zero disk are located on the MVX’s to

23 CHAPTER FOUR PRINCIPALS OF ULTRASONIC MEASUREMENT 4.1 Time versus thickness relationship Ultrasonic thickness measurements depend on measuring

Dakota Ultrasonics 24 through air efficiently. By using a liquid couplant between the transducer and test piece the amount of ultrasound entering the

MVX High Performance Thickness Gauge barrier. This allows the transducer the ability to achieve very high sensitivity for detecting small defect

3 CHAPTER ONE INTRODUCTION...1 CHAPTER TWO QUICK STARTUP GUIDE ...

Dakota Ultrasonics 26 Waveform showing echo from corroded backwall Waveform showing flaw with solid backwall

MVX High Performance Thickness Gauge 4.7 Glossary of terms Repetition Rate & Display Update The repetition rate is how often the MVX generat

28 CHAPTER FIVE SELECTING THE MEASUREMENT MODE 5.1 The setup library The MVX contains 64 user configurable preset locations to store custom setups

MVX High Performance Thickness Gauge transducers are suitable for use in both pulse-echo and echo-echo modes. This conveniently enables the user

Dakota Ultrasonics 30 5.3 Factory Setup Chart Num Name Comment 1 Gn/AGC Velocity 1 STEEL BASIC 45 0.2330 in/uSec 2 STEEL THRU PNT STD ¼

31 CHAPTER SIX MAKING MEASUREMENTS The steps involved in making measurements are detailed in this section. The following sections outline how to

Dakota Ultrasonics 32 Selecting the Transducer Type 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times t

MVX High Performance Thickness Gauge Selected from a Setup Important Note: Stored setups will save all the parameters of the MVX. Therefore, if

Dakota Ultrasonics 34 6) Press the OK key to select the setup and return to the menu screen, or ESC to cancel the selection process. 7) Press the MEA

MVX High Performance Thickness Gauge Selected Using The Tabbed Submenu Items 1) Press the MENU key once to activate the menu items tab. Press

Dakota Ultrasonics 36 Performing a Probe Zero 1) Clean the surface of the Probe Zero Disk, located on top of the MVX (battery cover). 2) Apply a dr

MVX High Performance Thickness Gauge all of the measurements the gauge makes will be erroneous by some fixed percentage. The One Point calibrat

Dakota Ultrasonics 38 8) Finally, press the MEAS key to return to the measurement screen and begin taking readings.

MVX High Performance Thickness Gauge One Point Calibration Note: Be sure that a probe zero has been done prior to performing this calibration

Dakota Ultrasonics 40 3) Use the UP and DOWN arrow keys to scroll through the sub menu items until ONE POINT is highlighted. 4) Press the ENTER key

MVX High Performance Thickness Gauge Note: Be sure that a probe zero has been done prior to performing this calibration procedure. 1) Using

Dakota Ultrasonics 42 3) Use the UP and DOWN arrow keys to scroll through the sub menu items until ONE POINT is highlighted. 4) Press the ENTER key

MVX High Performance Thickness Gauge 16) Finally, press the MEAS key to return to the measurement screen and begin taking readings. Note: CHECK

Dakota Ultrasonics 44 Built in Material Selection 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to

45 CHAPTER SEVEN USING THE A-SCAN & B-SCAN DISPLAYS A key feature of the MVX is the waveform display. The waveform is a graphical representat

1 CHAPTER ONE INTRODUCTION The Dakota Ultrasonics model MVX is a visual A / B scan ultrasonic thickness gauge. Based on the same operating princi

Dakota Ultrasonics 46 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right, and the ESC key mul

MVX High Performance Thickness Gauge readout. If the wave is outside of the display range, you can manually change the range by adjusting the De

Dakota Ultrasonics 48 Rectified View Rectified The rectified A-Scan mode shows half of the waveform. Either the positive or negative peaks are disp

MVX High Performance Thickness Gauge E) Echo Signal – Graphical full waveform representation of the return echo displayed as an amplitude (verti

Dakota Ultrasonics 50 screen from right to left. Also notice at location J, the pits and corroded bottom surface of the material. It’s important to n

MVX High Performance Thickness Gauge instance, and passes over a pit in the process, the scan bar will quickly deflect and alarm the user to go b

Dakota Ultrasonics 52 display up into 5 segments, or quadrants. The measurement labels correspond to the measurement at each hash mark. G) Scan Bar –

MVX High Performance Thickness Gauge 1) Press the MEAS key once to activate measure menu items. Press the MEAS key multiple times to move right

Dakota Ultrasonics 54 Adjusting the Width using the Tabbed Menus 1) Press the MENU key once to activate the menu items tab. Press the MENU key mul

MVX High Performance Thickness Gauge 9) Finally, press the MEAS key to return to the measurement screen and begin taking readings. Starting dela

2 CHAPTER TWO QUICK STARTUP GUIDE Turn the MVX on and off using the switch located on the bottom right corner of the keypad. When MVX is initiall

Dakota Ultrasonics 56 4) Press the UP and DOWN arrow keys to scroll the highlighted value. 5) Press the LEFT and RIGHT arrow keys to scroll the digi

MVX High Performance Thickness Gauge 4) Alternatively, press the ENTER key to display the Digits Edit Box. 5) Press the UP and DOWN arrow keys

Dakota Ultrasonics 58 1) Press the MEAS key once to activate measure menu items. Press the MEAS key multiple times to move right, and the ESC key m

MVX High Performance Thickness Gauge 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab righ

Dakota Ultrasonics 60 7.5 Threshold The Threshold is the level (sensitivity) of the signal amplitude required to trigger the thickness reading. This

MVX High Performance Thickness Gauge Adjusting the Threshold using the Hot Menus 1) Press the MEAS key once to activate measure menu items. P

Dakota Ultrasonics 62 Adjusting the Threshold using the Tabbed Menus 1) Press the MENU key once to activate the menu items tab. Press the MENU key

MVX High Performance Thickness Gauge 7.6 Gates The MVX is equipped with two gates that can be adjusted by the user to measure a specific region

Dakota Ultrasonics 64 SURFACE NOISE PROBLEM NO GATE W/GATE The diagrams above illustrate a typical surface noise condition.

MVX High Performance Thickness Gauge have also detected the true back wall (C). This example brings all the fine adjustments into consideration,

MVX High Performance Thickness Gauge 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until TYPE is highlighted. 3) Press

Dakota Ultrasonics 66 The user can also access and adjust the gate from the tabbed menus. However, this method is more tedious than making the adjust

MVX High Performance Thickness Gauge 9) Finally, press the MEAS key to return to the measurement screen and begin taking readings. Gate 2 The

Dakota Ultrasonics 68 2) Press the UP, DOWN, LEFT, and RIGHT arrow keys to scroll the highlighted value. 3) Alternatively, press the ENTER key to d

MVX High Performance Thickness Gauge 3) Press the LEFT and RIGHT arrow keys to scroll the value. When the correct gate value is being displaye

70 CHAPTER EIGHT THRU PAINT MEASUREMENT TECHNIQUE 8.1 Introduction to Thru Paint Measurement The principle behind thru paint measurement is by mea

MVX High Performance Thickness Gauge 8.2 Setting Up Thru Paint Mode The first thing to note in this section, is that by selecting the transduce

Dakota Ultrasonics 72 amplitude of the cycle just to the left of (B). If we tried to increase the threshold level above the height of the cycle, we w

73 CHAPTER NINE ADDITIONAL FEATURES OF THE MVX 9.1 Pulse Width The MVX has an adjustable pulse width option, located as a submenu item in the PROB

Dakota Ultrasonics 74 9.2 Auto Find The MVX is equipped with a very handy feature for locating the detection point of a back wall echo that is not cur

MVX High Performance Thickness Gauge 9.3 High Speed Scan The High Speed Scan feature of the MVX increases the overall sample rate from the standa

Dakota Ultrasonics 4 2) Assuming the probe menu is still displayed from the previous type selection, use the UP and DOWN arrow keys to scroll through

Dakota Ultrasonics 76 UTIL MENU – ALARM MODE Toggle Alarm Status (on/off) 1) Press the MENU key once to activate the menu i

MVX High Performance Thickness Gauge Setting the Alarm LO Limit 1) Assuming the ALARM STATUS is ON, use the UP and DOWN arrow keys to scroll t

Dakota Ultrasonics 78 Setting the Alarm HI Limit 1) Assuming the ALARM STATUS is ON,use the UP and DOWN arrow keys to scroll through the sub menu it

MVX High Performance Thickness Gauge Notice the +/- positions in the diagram. The positive phase is everything above the horizontal center lin

Dakota Ultrasonics 80 view the positive and negative cycles of the waveform. Please refer to page 46 for information on selecting the Display Views.

MVX High Performance Thickness Gauge Note: Before toggling the Rect Wave, the MVX should be set to the RECT display view option. Please refer t

82 CHAPTER TEN DATA STORAGE – SETUP, EDIT, & VIEW GRIDS 10.1 Introduction to Grid (spreadsheet) format Data is stored in the MVX in a spreadsh

MVX High Performance Thickness Gauge 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right,

Dakota Ultrasonics 84 10) Press the OK key to save the Grid Name and return to the Grid List Items menu, or ESC to cancel entering the Grid Name. Cr

MVX High Performance Thickness Gauge 3) Use the UP, DOWN, LEFT, & RIGHT arrow keys to highlight the appropriate alpha characters. 4) Press

MVX High Performance Thickness Gauge 1) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right

Dakota Ultrasonics 86 1) Use the UP and DOWN arrow keys to scroll through the new Grid List Items until TOP LEFT is highlighted. 2) Press the ENTE

MVX High Performance Thickness Gauge 1) Use the UP and DOWN arrow keys to scroll through the new Grid List Items until LOWER RIGHT is highlight

Dakota Ultrasonics 88 Note: If there is not enough memory available to create the grid, an error message box “NOT ENOUGH MEMORY“ will be displayed.

MVX High Performance Thickness Gauge Selecting the Auto Increment Direction The Auto Increment feature gives the user the ability to specify whi

Dakota Ultrasonics 90 Saving the Grid Once all the parameters are set, the user has the option of saving or canceling the new grid. 1) Use the UP a

MVX High Performance Thickness Gauge 3) Press the OK key to save the New Grid, or the ESC key to cancel the New Grid setup and return to the DAT

Dakota Ultrasonics 92 3) Press the UP, DOWN, LEFT, and RIGHT arrow keys to scroll the target cell cursor to the desired storage location. 5) Press t

MVX High Performance Thickness Gauge 2) Press the ENTER key to display the Grid View Box. 3) Press the UP, DOWN, LEFT, and RIGHT arrow keys to

Dakota Ultrasonics 94 3) Press the ENTER key to display the Grid List Box. 4) Use the UP and DOWN arrow keys to scroll through the stored Grids un

MVX High Performance Thickness Gauge 3) Press the ENTER key to activate the confirmation screen. 4) Press the OK key to delete All Grids from