OPERATION MANUAL DAKOTA ULTRASONICS DFX-7 Ultrasonic Flaw Detector (Manual 2 of 2) P/N P-220-0002 Rev 1.
CHAPTER ONE INTRODUCTION ...................................................................... 1 CHAPTER TWO QUICK START GUIDE ............................................................ 3 CHAPTER THREE KEYBOARD, MENU, & CONNECTOR REFERENCE ......... 7 CHAPTER FOUR SETTING UP FOR MEASUREMENT .................................. 24 CHAPTER FIVE CALIBRATION ....................................................................... 36 CHAPTER SIX TRIGONOMETRY MODE .................................................
CHAPTER ONE INTRODUCTION The Dakota Ultrasonics model DFX-7 is both, an ultrasonic flaw detector, as well as an ultrasonic A/B Scan thickness scope, in a single unit. It’s a combination of both our CMX DL+, as well as our new DFX-7 flaw detector series. Why is this advantageous? Thickness gauge are specifically setup to very accurately measure thickness, locate pits, flaws and blind surface corrosion.
1.2 Electrical Warning The DFX-7 contains a high voltage pulser. It’s recommended that the gauge be powered off prior to connecting or disconnecting your transducer, to avoid damaging the DFX-7.
CHAPTER TWO QUICK START GUIDE This section will cover a basic quick start guide to initially get up and running with the DFX-7 for demonstration purposes only. However, in order to use the gauge and features for actual applications, a thorough review of this manual is recommended. 2.1 Gauge Type Power up the DFX-7, by pressing the on/off key located in the bottom right corner of the keypad. During initial boot up, a flash screen and lights will be displayed, followed by a GAUGE TYPE selection screen.
Dakota Ultrasonics Pulse: Thin Matl 1pt: Uncal Delay: 0.000 Gain: 60 Detect: Above Max PRF: 125 Matl 2pt: Uncal Range: 5.011 Gain Step: 1.0 Gate 1: 0.484 Damping: 600 Velocity: .2320 Units: inches Detect Mode: Z-Cross Gate1 Width: INF Pulser Volt: 200 Zero: 0.0 Brightness: 15 Threshold 1: 40% Screen Update: 60Hz Polarity 1: Positive Colors: Green 2 Dim: Off Rect Wave: Filled Detect Mark: None Note: The following features are set to off: GT2, TRIG, AWS, TCG, DAC, DGS. 2.
DFX-7 Ultrasonic Flaw Detector DRAW DRAW REF GAIN SAVE EDIT KEY CLICK RESTORE SETUPS SHOW CURVE MEAS TRIGGER DELETE OPEN GAUGE BACKUP DATA EFF PROBE DEFAULT CLOSE BACKUP DATA DIA SETUP DELETE ONE RESTORE FILE DATA CURV DELETE ALL ABOUT SIZE(ERS) DATA CURVE % SCRN SHOW CURVE HEIGHT TRIGGER PROBE FREQ LANGUAGE CURVE DPOLARITY FIT ATTENUATION DELAY VELOCITY REF TYPE REF SIZE 2.
Dakota Ultrasonics 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 multiple times to tab left until the SET menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until DEFAULT SETUP is highlighted. 3) Press the ENTER key to display the confirmation screen. 4) Press the OK key to load the default setup and return to the measurement screen.
CHAPTER THREE KEYBOARD, MENU, & CONNECTOR REFERENCE 3.1 Menu Key (Operation & Sub Menus) The Menu key activates the primary menu structure containing 15 menu tab groups. These tab groups then contain sub menu items, or functions. The sub menu items have been organized in the tab groups according to how closely they are related to the individual tab group names. Let’s first get familiar with how to move around in these tabs before continuing on to the sub menu functions.
Dakota Ultrasonics Activating and Navigation of the Menu Items 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 multiple times to tab left until the desired tab group is highlighted and displaying the submenu items. The tab groups are illustrated above (A).
DFX-7 Ultrasonic Flaw Detector 3.2 Probe – Menu TYPE: Enables the user to select the type of transducer being used, either Single or Dual. PULSE: The DFX-7 has an adjustable pulse width for both high penetration and resolution applications. The pulse width refers to the duration of time the pulser is on. The options are Spike, Thin, and Wide. Refer to page 84 for a further explanation. MAX PRF: This feature controls the pulse repetition frequency of the DFX-7. The maximum frequency is 333 Hz.
Dakota Ultrasonics 3.4 DISP (display) – Menu VIEW: Selectable RF, +RECT, -RECT, RECTFW views. Refer to page 24 for further info. DELAY: Provides the user the ability to change the start position of the A-SCAN views. Refer to page 25 for further info. RANGE: Provides the user the ability to change the overall range/depth of the viewable measurement area. It functions a lot like a zoom on a camera. Refer to page 25 for further info. UNITS: Toggle between English or Metric units.
DFX-7 Ultrasonic Flaw Detector GAIN: The DFX-7 has a 0-110dB gain range with 2dB resolution. This feature is used to increase/decrease the strength or amplitude of the signal. This might easily be considered as similar to turning the volume up or down on a stereo receiver. Refer to page 28 for further info. GAIN STEP: Used to set the amount the GAIN is increased or decreased for each key press. Step options of 0.2, 0.4, 1.0, 2.0, 4.0 and 6.0. Refer to page 100 for further info.
Dakota Ultrasonics 3.7 GT2 – Menu ALARM 2: Toggles the alarm function of gate 2; on, off, audible. The audible feature sounds a beeper when the waveform breaks the threshold level, either above or below, depending on the current DETECT setting. Refer to page 31 for further info. DETECT: Enables the user to set the alarm detection to occur either above or below the gates threshold level. Refer to page 31 for further info.
DFX-7 Ultrasonic Flaw Detector X-OFFSET: This feature is used to calculate the surface distance in the trigonometry function, as is a physical measurement from the index point of the probe to the front of the wedge/can/shoe/case. Refer to page 51 for further info. CSC OD: Curved surface correction to compensate for changing sound path distance and angle. This feature is used in conjunction with ‘thickness’ in order to calculate a correction factor. Refer to page 51 for further info. 3.
Dakota Ultrasonics DAC: Toggles the DAC feature on/off/audible. A Distance Amplitude Correction (DAC) curve is used to configure a variable threshold for the gate, using the same size reflector at different distances. Refer to page 61 for further info. DRAW: Toggles the DRAW mode on/off/audible, and used to draw the DAC curve. Note: TCG curve cannot be drawn in RF view. Refer to page 61 for further info.
DFX-7 Ultrasonic Flaw Detector PROBE FREQUENCY: Used to set the center frequency of the probe/transducer. The frequency will either be scribed on the probe itself, and additionally listed on the transducer certificate. Refer to page 75 for further info. CURVE SIZE (ERS): Used to select the Effective Reflector Size that will be used from the DGS/AVG chart. Refer to page 75 for further info. ATTENUATION: Toggles the ATTENUATION on/off.
Dakota Ultrasonics DEFAULT SETUP: Loads a basic default setup. Use only as a last resort when the setups in the DFX-7 have been corrupted and a computer is not accessible. Refer to page 142 for further info. LANGUAGE: Provides the user the ability to select different languages for the DFX7. Refer to page 144 for further info. 3.14 DATA – Menu NEW: Allows the user the ability to create a new alpha numeric grid, or sequential log file with auto identifiers.
DFX-7 Ultrasonic Flaw Detector 3.16 XFER (transfer) – Menu BACKUP SETUPS: Enables the user the ability to backup the setups currently stored in the DFX-7 to a PC via RS232 port. USB adaptor included. Refer the help section of the DFX-7 DakView software for a complete electronic manual. RESTORE SETUPS: Enables the user the ability to restore the setups currently saved on a PC to an DFX-7 via RS232 port. Refer the help section of the DFX-7 DakView software for a complete electronic manual.
Dakota Ultrasonics The primary function of the OK key is confirmation of a change or selection. The OK key also toggles the Hot Menu area, while in measurement mode, to a large digits display area. If the DFX-7 is displaying a grid log, the OK key toggles an advance to row number option. Finally, when the TRIG feature has been activated, pressing the OK multiple times will toggle through sound path, surface distance, or depth and displayed in the Hot Menu area. 3.
DFX-7 Ultrasonic Flaw Detector The ON/OFF key simply powers the unit either ON or OFF. Note: Unit will automatically power off when idle for 5 minutes. All current settings are automatically saved prior to powering off. 3.25 DFX-7 Overview In order to understand how to operate the DFX-7, it’s best to start off with an understanding of what we’re looking at.
Dakota Ultrasonics E. F. G. H. I. J. K. v. DGS – Distance Gain Size View i. RF: Radio Frequency. ii. R+: Rectified positive. iii. R- : Rectified negative iv. FW: Rectified full wave. Detect i. Zero crossing (ZX) ii. Flank (FK) iii. Peak (PK) Leg – Skip leg reference, (L1…L4…) High Speed Scan Mode Alarm Mode Gain Setting Leg (skip leg) – Indicates which skip/leg the detection in on. The thickness of the material is used to calculate the leg.
DFX-7 Ultrasonic Flaw Detector The diagram above is a screenshot of the “Hot Menu” feature of the DFX-7. The Hot Menu’s contain all the most regularly adjusted features of the gauge. The primary purpose of the design, was to provide the user with an efficient way to make adjustments on the fly during inspections. The following procedure outlines the steps to navigate and make adjustments as follows: Hot Menu Gate1 1) Press the MEAS key once to activate the Hot Menu.
Dakota Ultrasonics Note: Above will trigger the alarm when a signal meets or exceeds the height of the gate, and below will detect on anything that meets or is below the height of the gate. 3) Alternatively, press the ENTER key to display the Digits Edit Box. 4) Press the UP and DOWN arrow keys to scroll the highlighted value. 5) Press the LEFT and RIGHT arrow keys to scroll the digit locations. 6) Repeat steps 4 & 5 until the start position is correctly displayed.
DFX-7 Ultrasonic Flaw Detector Battery Cover Refer to Diagram: The Battery cover is the large round disk shown in the diagram. Be sure to check the polarity indicator diagram, located on the back label of the DFX7. Note: Rechargeable batteries can be used, however must be recharged outside of the gauge in a standalone battery charger. RS-232 Connector Refer to Diagram: The RS-232 connector, located on the bottom end cap, is a 2 pin female Lemo connector.
CHAPTER FOUR SETTING UP FOR MEASUREMENT 4.1 Selecting Display View The DFX-7 includes a variety of viewing options for the waveform display. There are three primary options waveform options with selectable polarity. These are all outline below as follows: Radio Frequency (RF): Displays the entire sine wave signal, much like an oscilloscope, from a reflector or return echo. This view shows both the positive and negative peaks.
DFX-7 Ultrasonic Flaw Detector 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until VIEW is highlighted. 3) Use the LEFT and RIGHT arrow keys to scroll the view options (RF, +RECT, -RECT, RECTFW). 4) Once the view is displayed, press the MEAS key to return to measurement mode. 4.2 Adjusting the display This section will cover the procedures for adjusting the viewable range, or area, of the display, in terms of thickness.
Dakota Ultrasonics Setting Delay 1) Press the MEAS key once to activate measure menu items. Press the MEAS key multiple times to move right and the ESC key multiple times to move left, until the DELAY cell is highlighted. 2) Press the UP, DOWN, LEFT, and RIGHT arrow keys to scroll the highlighted value. 3) Alternatively, press the ENTER key to display the Digits Edit Box. 4) Press the UP and DOWN arrow keys to scroll the highlighted value.
DFX-7 Ultrasonic Flaw Detector The Range is the distance from the delay that will be viewable on the screen. It can be adjusted to any value greater than the Delay. The procedures to adjust the range are outlined below: Setting Range 1) Press the MEAS key once to activate measure menu items. Press the MEAS key multiple times to move right and the ESC key multiple times to move left, until the RANGE cell is highlighted. 2) Press the UP, DOWN, LEFT, and RIGHT arrow keys to scroll the highlighted value.
Dakota Ultrasonics 4.3 Gain The gain feature of the DFX-7 is used to adjust the signal amplitude to a predetermined reference height for the inspection process. The higher the gain the more the sound is amplified. The gain, or amplification of the return echoes, can be adjusted in the DFX-7 to accommodate a variety of applications. The setting of the gain is crucial in order to obtain valid readings during the inspection process.
DFX-7 Ultrasonic Flaw Detector 4) Press the UP and DOWN arrow keys to scroll the highlighted value. 5) Press the LEFT and RIGHT arrow keys to scroll the digit locations. 6) Repeat steps 4 & 5 until the GAIN value is correctly displayed. 7) Press the OK key to return to the measurement screen, or ESC to cancel entering the GAIN.
Dakota Ultrasonics The user can also access and adjust the gain from the tabbed menus. However, this method is more tedious than making the adjustments using the Hot Menus. The procedure using the tabbed menus is outlined below: Adjusting the Gain using the Tabbed Menus 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 multiple times to tab left, until the TUNE menu is highlighted and displaying the submenu items.
DFX-7 Ultrasonic Flaw Detector 9) Finally, press the MEAS key to return to the measurement screen. 4.4 Gates The gates are an important part of any ultrasonic device, in this case a flaw detector. The primary purpose of using a flaw detector is to “detect” and estimate the “size” of of flaws according to calibrated reference standards or simulated defects. The gates play an important role in this process, as without them a detection/measurement isn’t possible.
Dakota Ultrasonics No Gate Gate On The screenshots above show a rectified waveform with and without a gate enabled. The following steps outline how to enable a gate as follows: Activating a Gate Gate1 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 multiple times to tab left, until the GT1 menu is highlighted and displaying the submenu items.
DFX-7 Ultrasonic Flaw Detector Note: Above will trigger the alarm when a signal meets or exceeds the height of the gate, and below will detect on anything that meets or is below the height of the gate. Set Gate1 Start 1) Press the UP and DOWN arrow keys until GATE1 is highlighted, followed by pressing the LEFT and RIGHT arrow keys to scroll the value. When the correct start position is displayed, proceed to the next setting. 2) Alternatively, press the ENTER key to display the Digits Edit Box.
Dakota Ultrasonics 6) Press the OK key to set the GATE1 WIDTH and return to the menu screen, or ESC to cancel entering the GATE1 WIDTH. Note: This sets the overall width of the gate in terms of the horizontal axis or depth. Sets the right boundary of the gate, or where it turns off. Set Threshold1 Level 1) Press the UP and DOWN arrow keys until THRESHOLD1 is highlighted, followed by pressing the LEFT and RIGHT arrow keys to scroll the value.
DFX-7 Ultrasonic Flaw Detector Note: Sets where the detection will occur, on the negative or positive going echoes.
CHAPTER FIVE CALIBRATION In this section we’ll focus on calibrating the DFX-7. There are a number of ways to go about performing a calibration, but we’ll be focusing on the simplest and most accurate method, which is performing a two point calibration. This method is very convenient, as it will automatically calculate the material velocity and zero using a minimum and maximum calibration standard of know thickness and material type.
DFX-7 Ultrasonic Flaw Detector The gauge will require a few basic adjustments in order to get underway with the calibration process. For this example, in order to avoid multiple steps for setting the gauge features/options, the default setup will be loaded as a starting point.
Dakota Ultrasonics 2) Press the ENTER key to display the Digits Edit Box. 3) Press the UP and DOWN arrow keys to scroll the highlighted value. 4) Press the LEFT and RIGHT arrow keys to scroll the digit locations. 5) Repeat steps 3 & 4 until the desired range value is displayed. 6) Press the OK key to set the value and return to the GT1 menu. Note: Our range calibration range for this example is 4 inches. Therefore setting a range of 5 inches will enable the user to view the entire range on the display.
DFX-7 Ultrasonic Flaw Detector Activating a Gate 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 multiple times to tab left until the GT1 menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until ALARM is highlighted. 3) Press the LEFT and RIGHT arrow keys to toggle the gate ON.
Dakota Ultrasonics 5) Repeat steps 3 & 4 until the desired GATE1 value is displayed. Note: In our example, a value less than 1 inch should be selected. 6) Press the OK key to set the value and return to the GT1 menu. Gate1 Width 1) Use the UP and DOWN arrow keys to scroll through the sub menu items until GATE1 WIDTH is highlighted. 2) Press the ENTER key to display the Digits Edit Box. 3) Press the UP and DOWN arrow keys to scroll the highlighted value.
DFX-7 Ultrasonic Flaw Detector Setting Polarity 1) Use the UP and DOWN arrow keys to scroll through the sub menu items until POLARITY1 is highlighted. 2) Press the LEFT and RIGHT arrow keys to toggle the polarity POSITIVE. 3) Press the MEAS key to return to the measurement screen and get started with the two point calibration. 5.
Dakota Ultrasonics Coupling to the 1” Cal Standard (1st Point) Apply a drop of couplant on the transducer and place the transducer in steady contact with the 1” calibration standard. Be sure that the reading is stable and the repeatability indicator, in the top left corner of the display, is fully lit and stable. Also, be sure there is sufficient signal amplitude in order to avoid ‘peak jumping’ or missing the first cycle. Adjusting the Gate 1) Press the MEAS key once to activate the measure menu items.
DFX-7 Ultrasonic Flaw Detector 3) Press the ENTER key to display the Digits Edit Box. 4) Press the UP and DOWN arrow keys to scroll the highlighted value. 5) Press the LEFT and RIGHT arrow keys to scroll the digit locations. 6) Repeat steps 4 & 5 until the known thickness value is correctly displayed. 7) Press the OK key to calculate the velocity and return to the menu screen, or ESC to cancel the one point calibration.
Dakota Ultrasonics stable. Also, be sure there is sufficient signal amplitude in order to avoid ‘peak jumping’ or missing the first cycle. Adjusting the Gate 1) Press the MEAS key once to activate the measure menu items. Press the MEAS key multiple times to move right and the ESC key multiple times to move left, until the GATE1 cell is highlighted. 2) Press the LEFT and RIGHT arrow keys to move the gate over the waveform to be measured, as demonstrated in the screen shot above.
DFX-7 Ultrasonic Flaw Detector 4) Press the UP and DOWN arrow keys to scroll the highlighted value. 5) Press the LEFT and RIGHT arrow keys to scroll the digit locations. 6) Repeat steps 4 & 5 until the known thickness value is correctly displayed. 7) Press the OK key to calculate the velocity and return to the menu screen, or ESC to cancel the one point calibration. Note: A velocity and zero value will be calculated and displayed in the fields a shown above.
Dakota Ultrasonics Adjusting the Gate to Calibrated Range 1) Press the MEAS key once to activate the measure menu items. Press the MEAS key multiple times to move right and the ESC key multiple times to move left, until the GATE1 cell is highlighted. 2) Press the LEFT and RIGHT arrow keys to move the gate start to a position less than 1 inch. 3) Press the MEAS key once to highlight the WIDTH1 cell. 4) Press the LEFT and RIGHT arrow keys to move the gate start to a position greater than 4 inches.
DFX-7 Ultrasonic Flaw Detector Note: CHECK YOUR CALIBRATION! Place the transducer back on the one inch point, and any others in the given range, to confirm linearity. If the velocity and zero values we calculated correctly, the thickness reading will match the known thickness of the calibration standards. If the thickness is not correct, repeat the steps above. 5) Press the OK key once to display the thickness, or the MEAS key to return to the hot menus at any time. 5.
Dakota Ultrasonics Shear versus Longitudinal Velocity: Unlike the previous straight beam calibration, which uses a longitudinal wave, an angle beam transducer uses a shear wave. The following is a brief review of the waves: Longitudinal – o Particle motion is parallel to the direction of wave travel. o Travels in solids, liquids, and gasses. o Fastest mode of vibration. Shear – o Particle motion is perpendicular to the direction of wave travel. o Travels only in solids.
DFX-7 Ultrasonic Flaw Detector wave values, the TRIG mode must be enabled. The following outlines the steps to enable the shear wave velocity table and select a material type from the chart: Selecting the Material Type 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 multiple times to tab left until the TRIG menu is highlighted and displaying the submenu items. 2) Press the LEFT and RIGHT arrow keys to toggle TRIG mode ON.
Dakota Ultrasonics 7) Press the ENTER key to select the material type and initiate the overwrite confirmation screen. 8) Press the OK key to confirm the material selection, or ESC key to cancel changing the material type.
CHAPTER SIX TRIGONOMETRY MODE 6.1 Introduction to TRIG Trig mode is most commonly used for inspecting welded joints using an angle beam transducer. Based on the location, orientation, and geometry of the weld, a straight beam transducer is typically not suitable for inspection. As a result, a transducer emitting sound at a given angle will allow the operator to position the transducer away from the actual weld, and “skip” into the weld at a given angle.
Dakota Ultrasonics When TRIG mode is enabled, the calculated measurements will be displayed below the waveform display area at (A), and the signal amplitude as a percentage of full screen height at (B). Curved Surface Correction: The DFX-7 will also compensate for convex curved surfaces of longitudinally welded pipes. A curved surface will produce a greater sound path than a flat surface will, using a transducer with a given angle.
DFX-7 Ultrasonic Flaw Detector Activating & Setting the Parameters Activate Trig Mode 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 multiple times to tab left, until the TRIG menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until TRIG is highlighted. 3) Press the LEFT and RIGHT arrow keys to toggle the TRIG feature ON.
Dakota Ultrasonics 4) Press the LEFT and RIGHT arrow keys to scroll the digit locations. 5) Repeat steps 3 & 4 until the thickness is correctly displayed. 6) Press the OK key to set the THICKNESS and return to the menu screen, or ESC to cancel entering the THICKNESS. Note: Thickness is used to calculate the depth. Transducer Angle 1) Press the UP and DOWN arrow keys until ANGLE is highlighted, followed by pressing the LEFT and RIGHT arrow keys to scroll the value.
DFX-7 Ultrasonic Flaw Detector 6) Press the OK key to set the X-OFFSET and return to the menu screen, or ESC to cancel entering the X-OFFSET. Note: The X-Offset is used for purposes of marking, and is physically measured with a ruler from the index point to the front edge of the transducer. Curved Surface Outside Diameter 1) Press the UP and DOWN arrow keys until CSC OD is highlighted, followed by pressing the LEFT and RIGHT arrow keys to scroll the value.
CHAPTER SEVEN AWS – WELD INSPECTION 7.1 Introduction to AWS AWS provides a toolkit for evaluating defects according to the American Welding Society D1.1 welding code. The code offers inspectors a method to classify discontinuities by calculating and Indication Rating (IR) using ultrasonics. This toolkit can be used in conjunction with TRIG mode, outlined in the previous chapter, to simultaneously display the sound path (SP), surface distance (SD), and depth (D).
DFX-7 Ultrasonic Flaw Detector inspection, and should additionally be setup prior to enabling the AWS feature. Refer to Chapter Six for instructions on setting up TRIG mode. Activating & Setting AWS Activate Trig Mode 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 multiple times to tab left, until the AWS menu is highlighted and displaying the submenu items.
Dakota Ultrasonics 3) Press the UP and DOWN arrow keys to scroll the highlighted value. 4) Press the LEFT and RIGHT arrow keys to scroll the digit locations. 5) Repeat steps 3 & 4 until the height is correctly displayed. 6) Press the OK key to set the % SCRN HEIGHT and return to the menu screen, or ESC to cancel entering the % SCRN HEIGHT. Note: % Screen Height is an arbitrary level, and is not specified by the AWS D1.1.
DFX-7 Ultrasonic Flaw Detector 2) Press the LEFT and RIGHT arrow keys to position the start of GATE1 to trigger on the waveform. 3) Optionally, press the MEAS key multiple times to move right and the ESC key multiple times to move left, until the WIDTH1 cell is highlighted. 4) Press the LEFT and RIGHT arrow keys to adjust the size or width of GATE1. Note: When the signal is in the gate, the height indicator will detect and display the % full screen height.
Dakota Ultrasonics Note: The AWS screen can be toggle on by pressing the OK key while in the main measurement screen. Equally, the Hot Menus can be toggled by pressing the MEAS at any time.
CHAPTER EIGHT DISTANCE AMPLITUDE CORRECTION (DAC) 8.1 Introduction to DAC A DAC curve is a gate with a variable threshold to compensate for a given reflector type and size measured at different depths. Unlike a standard gate, which typically has a fixed threshold level regardless of the depth, the DAC curve is more representative of the reflector size at different depths.
Dakota Ultrasonics %FSH – The top of the waveform display represents 100% full screen height. Any waveform amplitudes generated greater than 100% full screen height will not be displayed. 100% is the greatest value that can be displayed. Note: The MEAS option selected is overridden with %FSH while the DAC curve is in DRAW mode. Once the DRAW mode is turned off, the select MEAS option will be displayed. The MEAS, CURVE, and TRIGGER options can be changed at any time once the DAC curve has been created.
DFX-7 Ultrasonic Flaw Detector 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until DAC is highlighted. 3) Press the LEFT and RIGHT arrow keys to toggle the DAC feature ON or AUDIBLE. The menu items should now become active and adjustable, as illustrated above. Activating Draw Mode 1) Press the UP and DOWN arrow keys until DRAW is highlighted, followed by pressing the LEFT and RIGHT arrow keys until ON is displayed.
Dakota Ultrasonics 1) Press the UP and DOWN arrow keys multiple times until FIT is highlighted, followed by pressing the LEFT and RIGHT arrow keys to select SPLINE or LINEAR. 2) Proceed to the next section – Drawing the DAC. Drawing the DAC 1) With all the parameters set in the previous section, press the MEAS key once to return to the main measurement screen. Note: The user should now see a highlighted cursor displayed in the waveform area, starting at the left most side of the display area.
DFX-7 Ultrasonic Flaw Detector ex. 1 ex. 2 2) Press the MEAS key multiple times to move right, and the ESC key multiple times to move left until the DAC BOX: cell is highlighted. Now that the DAC BOX: cell is highlighted, the cursor can be controlled by moving the LEFT and RIGHT arrow keys.
Dakota Ultrasonics 6) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right, and the ESC key multiple times to tab left, until the DAC menu is highlighted and displaying the submenu items. 7) Press the UP and DOWN arrow keys until DRAW is highlighted, followed by pressing the LEFT and RIGHT arrow keys until OFF is displayed. The DAC curves are now set and ready to be used for inspection.
CHAPTER NINE TIME CORRECTED GAIN (TCG) 9.1 Introduction to TCG The TCG feature increases gain as distance increases, in order to achieve an overall level of sensitivity for the same reflector at different distances. It is very similar to the DAC feature noted in a previous chapter.
Dakota Ultrasonics Activating TCG 4) Press the MENU key once to activate the menu items tab. Press the MENU key multiple times to tab right, and the ESC key multiple times to tab left, until the TCG menu is highlighted and displaying the submenu items. 5) Use the UP and DOWN arrow keys to scroll through the sub menu items until TCG is highlighted. 6) Press the LEFT and RIGHT arrow keys to toggle the TCG feature ON. The menu items should now become active and adjustable, as illustrated above.
DFX-7 Ultrasonic Flaw Detector 11) Press the OK key to set the % SCRN HEIGHT and return to the menu screen, or ESC to cancel entering the % SCRN HEIGHT. Activating Draw Mode 4) Use the UP and DOWN arrow keys to scroll through the sub menu items until DRAW is highlighted. 5) Press the LEFT and RIGHT arrow keys to toggle the DRAW feature ON. 6) Proceed to the next section – Drawing the TCG curve.
Dakota Ultrasonics ex. 1 ex. 2 2) Press the MEAS key multiple times to move right, and the ESC key multiple times to move left until the TCG BOX: cell is highlighted. Now that the TCG BOX: cell is highlighted, the cursor can be controlled by moving the LEFT and RIGHT arrow keys. 3) Couple the transducer to the first calibration standard, and peak up on the reflector to achieve maximum signal amplitude.
DFX-7 Ultrasonic Flaw Detector 7) Press the UP and DOWN arrow keys until DRAW is highlighted, followed by pressing the LEFT and RIGHT arrow keys until OFF is displayed. The TCG curve is now set. 8) Optionally, the TCG curve can be displayed by pressing the UP and DOWN arrow keys until CURVE is highlighted, followed by pressing the LEFT and RIGHT arrow keys toggle ON. 9) Press the MEAS key to display the main measurement screen, and the TCG curve will be displayed.
CHAPTER TEN DISTANCE, GAIN, SIZE (DGS) 10.1 Introduction to DGS (AVG) The DGS (Distance, Gain, Size) method was introduced in 1958 as a way to standardize the process of evaluating and sizing defects, also referred to by the German acronym AVG. This method uses a combined empirical and mathematical model to eliminate the need for a large range of reference standards, generally required when using the DAC or TCG methods.
DFX-7 Ultrasonic Flaw Detector Considerations: Should only be used with single element probes. The effective diameter must be estimated for standard transducers not certified for DGS. Center frequency clarity is required. Highly damped transducers can sometimes produce a broadband frequency range, and should not be used. 10.2 DGS Diagram In order to get familiar with the DGS diagram, let’s take a look at some of the general concepts. The near and far fields are referenced at point (A).
Dakota Ultrasonics Where: N = Near Field Length DEFF = Effective Diameter = Wave Length (velocity/frequency) In order to approximate the effective diameter, the shape of the crystal must be taken into account. Transducers are either round or square/rectangular in shape, and can be approximated as follows: Round Crystal (DEFF) Where: DEFF = Effective Diameter Dia. = Diameter of the crystal 0.
DFX-7 Ultrasonic Flaw Detector DEFF = Effective Diameter K = Aspect Ratio A = Largest Dimension 0.97 = Fixed Ratio Calculated results can also be compared to the following table: Ratio of the sides B/A 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 K 1.37 1.25 1.15 1.09 1.04 1.01 1.00 0.99 0.99 0.99 10.
Dakota Ultrasonics DGS: Activate the DGS on/off. Reference Gain: Activated to set the reference gain using a given reflector from a calibration standard. Trigger Curve: Enables the user to set the detection curve to either DGS or GATE. This will be the curve used to trigger the alarms and display the effective reflector size (ERS) during the inspection process. Effective Probe Diameter: A variable used to calculate the near field length of a given transducer, and determine the defect size.
DFX-7 Ultrasonic Flaw Detector DVK (Curvature Correction): If a V1/K1 or V2/K2 (A2/A4, IIW/Kidney) calibration standard is used as a reference reflector, the curved surface offers additional focus normally resulting in greater signal output. DVK is a correction to the gain, in order to simulate the amplitude generated from a flat back wall. This will typically result in an overall gain increase.
Dakota Ultrasonics Activating DGS 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 multiple times to tab left, until the DGS menu is highlighted and displaying the submenu items. 2) Press the UP and DOWN arrow keys multiple times to scroll through the sub menu items until DGS is highlighted. 3) Press the LEFT and RIGHT arrow keys to toggle the DGS feature ON.
DFX-7 Ultrasonic Flaw Detector 2) Alternatively, press the ENTER key to display the Digits Edit Box. 3) Press the UP and DOWN arrow keys multiple times to scroll the highlighted value. 4) Press the LEFT and RIGHT arrow keys multiple times to scroll the digit locations. 5) Repeat steps 3 & 4 until the diameter is correctly displayed. 7) Press the OK key to set the EFF PROBE DIAMETER and return to the menu screen, or ESC to cancel entering the EFF PROBE DIAMETER.
Dakota Ultrasonics 2) Press the UP and DOWN arrow keys multiple times until ERS is highlighted, followed by pressing the LEFT and RIGHT arrow keys to scroll the value. When the correct ERS is displayed, proceed to the next setting. 2) Alternatively, press the ENTER key to display the Digits Edit Box. 3) Press the UP and DOWN arrow keys multiple times to scroll the highlighted value. 4) Press the LEFT and RIGHT arrow keys multiple times to scroll the digit locations.
DFX-7 Ultrasonic Flaw Detector 6) Press the LEFT and RIGHT arrow keys multiple times to scroll the digit locations. 7) Repeat steps 5 & 6 until the parameter value is correctly displayed. 8) Press the OK key to set the value and return to the ATTENUATION sub menu screen, or ESC to cancel entering the parameter value. Drawing the DGS Curve 1) Press the UP and DOWN arrow keys multiple times until REFERENCE GAIN is highlighted, followed by pressing the LEFT and RIGHT arrow keys to toggle on.
Dakota Ultrasonics 2) Couple the transducer to the first calibration standard, and peak up on the reflector, adjusting the gain to keep the signal height within the boundaries of the waveform display area, and at a suitable height to allow for attenuation at greater depths in the overall range to be tested. 3) Press the LEFT and RIGHT arrow keys to move the cursor over the waveform that will be used to set the REFERENCE GAIN and draw the DGS curve. Note: The DGS curve uses 16 points to plot the curve.
DFX-7 Ultrasonic Flaw Detector 5) Press the UP and DOWN arrow keys multiple times until REFERENCE GAIN is highlighted, followed by pressing the LEFT and RIGHT arrow keys to toggle OFF. The DGS curve is now set and ready to be used for inspection.
CHAPTER ELEVEN ADDITIONAL FEATURES OF THE DFX-7 11.1 Pulse Width The DFX-7 has a square wave pulser with adjustable pulse width option. Pulse width, refers to the duration of time the pulser is left on. This time results in increased energy sent into the test material. There are three width options (SPIKE, THIN, and WIDE). The SPIKE setting may be desirable for high resolution and general applications to decrease the overall noise.
DFX-7 Ultrasonic Flaw Detector 11.2 Pulse Repetition Frequency (PRF) The DFX-7 is equipped an adjustable pulse repetition rate, with adjustable settings of 8, 16, 32, 66, 125, 250, and 333Hz. The primary purpose is to control how fast the pulser is firing. The repetition rate is tied into the alarm LEDS. Therefore, when scanning at higher speeds, a higher repetition rate will make the alarm trigger more responsive.
Dakota Ultrasonics 4) Once the desired PRF is displayed, press the MEAS key to return to the measurement screen. 11.3 Damping The DFX-7 has an adjustable damping feature, enabling the user to select from a variety of settings according the transducer frequency and overall output. The range of the damping feature is 50-1500 ohms. The available steps are 50, 75, 100, 300, 600 and 1500 ohms. Lower frequency transducers require less damping because they typically have higher impedance and distort.
DFX-7 Ultrasonic Flaw Detector 4) Once the desired DAMPING is displayed, press the MEAS key to return to the measurement screen. 11.4 Pulser Voltage The DFX-7 has a 200 volt square wave pulser that can be adjusted for specific applications and transducers. The Pulser Volt feature offers a 50 volt cut/boost option to the user. The standard setting is 200 volts. This enables the DFX-7 to offer greater penetration for difficult material types, or increased resolution on noisy materials.
Dakota Ultrasonics 11.5 Material Velocity Charts The DFX-7 has two material velocity charts built into the gauge with both longitudinal and shear material velocities. It should be noted that in order to display the chart containing the shear wave velocities the TRIG mode must be activated, as we’ve assumed an angle beam transducer will be used for the inspection process. The procedure is listed below: Selecting a Basic Material Type 1) Press the MENU key once to activate the menu items tab.
DFX-7 Ultrasonic Flaw Detector 3) Press the ENTER key to display the list of material types. 4) Press the UP and DOWN arrow keys to scroll through the material list until the appropriate material is highlighted. 5) Press the ENTER key to overwrite the material type and display the menu items with the new material type selected. 6) Finally, press the MEAS key to return to the measurement screen and begin taking readings. 11.
Dakota Ultrasonics 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 multiple times to tab left until the CAL menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until VELCITY is highlighted. 3) Press the LEFT and RIGHT arrow keys to scroll the value. When the correct velocity value is being displayed, proceed to step 8.
DFX-7 Ultrasonic Flaw Detector to perform a ‘crude’ manual screen calibration. The procedure for adjusting the zero is listed below: Adjusting Zero 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 multiple times to tab left until the CAL menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until ZERO is highlighted.
Dakota Ultrasonics 8) Press the OK key to set the zero and return to the menu screen, or ESC to cancel entering the zero. 9) Finally, press the MEAS key to return to the measurement screen. 11.8 Brightness The DFX-7 is equipped with a brightness feature to adjust the display visibility and optimize battery life. It has an arbitrary scale with a values from 1-20, with 20 representing the brightest setting.
DFX-7 Ultrasonic Flaw Detector 4) Alternatively, press the ENTER key to display the Digits Edit Box. 5) Press the UP and DOWN arrow keys to scroll the highlighted value. 6) Press the LEFT and RIGHT arrow keys to scroll the digit locations. 7) Repeat steps 5 & 6 until the brightness number is correctly displayed. 8) Press the OK key to set the brightness and return to the menu screen, or ESC to cancel entering the brightness.
Dakota Ultrasonics 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 multiple times to tab left until the PRB menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until SCREEN UPDATE is highlighted. 3) Use the LEFT and RIGHT arrow keys to toggle 60Hz or 120Hz. 4) Once the desired SCREEN UPDATE is displayed, press the MEAS key to return to the measurement screen.
DFX-7 Ultrasonic Flaw Detector 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 multiple times to tab left until the DISP menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until VIEW is highlighted. 3) Press the ENTER key to display a list of the color scheme options.
Dakota Ultrasonics 6) Finally, press the MEAS key to return to the measurement screen and begin taking readings. 11.11 DIM The DFX-7 has a built-in DIM feature to manage power more effectively. This feature has adjustable time durations, until the power of the display is dimmed and current draw reduced. The timer is constantly reset while the user is making measurements, and is only activated when the gauge is idle for the duration of time the DIM value is set for.
DFX-7 Ultrasonic Flaw Detector 4) Finally, press the MEAS key to return to the measurement screen and begin taking readings. 11.12 Graphics Options (look & feel) The DFX-7 includes a couple of cosmetic features for user preference when viewing the waveform. These features only serve as cosmetic items, and do not change the functionality of the DFX-7 in any way.
Dakota Ultrasonics The procedure to select the look and feel option is outlined below: Setting the Look & Feel 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 multiple times to tab left until the DISP menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until RECT WAVE is highlighted. 3) Use the LEFT and RIGHT arrow keys to scroll the RECT WAVE options.
DFX-7 Ultrasonic Flaw Detector 11.13 Detect Mark Another look and feel option of the DFX-7 is the DETECT MARK feature. The detect mark give the user the option to select: none, line, dots, or box. Depending on the select made, an indication will be displayed on the waveform, showing where the detection is occurring. It should be noted that the “box” option will only be visible in RF view. The following screenshots illustrate the above selection options: None Line Dots Box 11.
Dakota Ultrasonics 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 multiple times to tab left until the TUNE menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until FILTERS is highlighted. 3) Use the LEFT and RIGHT arrow keys to scroll the FILTERS options. 4) Once the desired FILTERS is displayed, press the MEAS key to return to the measurement screen. 11.
DFX-7 Ultrasonic Flaw Detector 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 multiple times to tab left until the TUNE menu is highlighted and displaying the submenu items. Alternatively, press the LEFT and RIGHT arrow keys multiple times using the left button wheel. 2) Use the UP and DOWN arrow keys multiple times on the left button wheel to scroll through the sub menu items until GAIN STEP is highlighted.
Dakota Ultrasonics 9) Finally, press the MEAS key to return to the measurement screen. 11.16 Detect Modes The DFX-7 has three selectable modes of detection: Z-Cross, Flank, and Peak. The following diagram illustrates the difference between the options: Z-Cross Flank Peak Refer to the diagrams above. The current polarity is positive, as shown by the position of the gate above the baseline: Z-Cross: The detection occurs as the first positive half cycle crosses the baseline and goes negative.
DFX-7 Ultrasonic Flaw Detector 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 multiple times to tab left until the TUNE menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until DETECT MODE is highlighted. 3) Use the LEFT and RIGHT arrow keys to scroll the DETECT options. 4) Once the DETECT is displayed, press the MEAS key to return to the measurement screen.
Dakota Ultrasonics everything below the center line. The baseline is found at position (A), and considered zero dB. If +RECT was selected as the view, only the positive portion of the waveform would be displayed. Equally, if the gate polarity was set to positive, as in the diagram at (C), it would also appear on the display. However, if it was set to negative, would not appear on the display.
DFX-7 Ultrasonic Flaw Detector until the DISP, DAC, GT1, or GT2 menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until VIEW, DPOLARITY, POLARITY1, or POLARITY2 is highlighted. 3) Use the LEFT and RIGHT arrow keys to toggle the VIEW, DPOLARITY, POLARITY1, or POLARITY2 negative or positive. 4) Press the MEAS key to return to the measurement screen and begin taking readings. 11.
Dakota Ultrasonics 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 multiple times to tab left, until the UTIL menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until AUTO FIND is highlighted. 3) Place the transducer on the test material and obtain a reading. 4) Press the ENTER key to automatically adjust the display settings and bring the waveform into view.
DFX-7 Ultrasonic Flaw Detector Alternatively, press the LEFT and RIGHT arrow keys multiple times using the left button wheel. 2) Use the UP and DOWN arrow keys multiple times on the left button wheel to scroll through the sub menu items until KEY CLICK is highlighted. 3) Use the LEFT and RIGHT arrow keys multiple times using the left button wheel to scroll the KEY CLICK options. 4) Once the desired KEY CLICK is displayed, press the MEAS key to return to the measurement screen. 11.
Dakota Ultrasonics 2) Use the UP and DOWN arrow keys PEAK is highlighted. 3) Press the MEAS key to return to the measurement screen. Clearing Current Wave Draw Note: At any point during a PEAK scan the operator may opt to clear the wave drawing and start over. 1) Press the CLR key at any time to clear the currently displayed waveform, and continue the scanning process. Disabling PEAK Note: In order to deactivate the PEAK hold feature.
DFX-7 Ultrasonic Flaw Detector Note: Assuming the operator currently has a waveform that they’d like to freeze on the display. 1) Press the MULTI MODE key located in the bottom left corner of the keypad to display the mode options. 2) Use the UP and DOWN arrow keys FREEZE is highlighted. 3) Press the ENTER key to set the mode and automatically return to the measurement screen. Disabling Freeze Note: In order to deactivate the FREEZE feature.
CHAPTER TWELVE DATA STORAGE – SETUP, EDIT, & VIEW FILES 12.1 Introduction to Grid and Sequential file formats The DFX-7 is equipped with two data file format options, GRID LOG and SEQ LOG. The GRID file format is very similar to a spreadsheet format found in popular software programs like Excel. A GRID is simply a table of readings. A location in a grid is specified by giving a row and column coordinate. The rows are numbered from 1 to 999 and the columns are labeled from A to ZZ (999 Rows & 52 Columns).
DFX-7 Ultrasonic Flaw Detector Grid File Formats Sequential Log Formats Important Note: For the duration of this chapter, all references to GRIDS and SEQ LOGS should be considered synonymous with references to FILES. 12.2 Creating a new Grid or Sequential Log (File) Important Note: This entire section is a step by step guide to successfully create a grid or sequential log.
Dakota Ultrasonics Creating a Name Grid/Seq Log Name : Can contain a combination of up to 20 numeric, alpha, or special characters listed in the first section of this chapter. Grid Log Sequential Log 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 multiple times to tab left, until the DATA menu is highlighted and displaying the submenu items.
DFX-7 Ultrasonic Flaw Detector Grid Log Sequential Log 4) Press the ENTER key to display the new Grid or Seq Edit Box. 5) Use the UP and DOWN arrow keys to scroll through the new Grid or Seq List Items until NAME is highlighted. 6) Press the ENTER key to activate the Alpha Edit Box. 7) Use the UP, DOWN, LEFT, & RIGHT arrow keys to highlight the appropriate alpha characters. 8) Press the ENTER key to select a character and advance to the next field of the Grid or Seq Name.
Dakota Ultrasonics 9) Use the CLR key to backspace if necessary. 10) Repeat steps 6 - 9 until the Grid or Seq Name (File Name) is completed. 11) Press the OK key to save the Grid or Seq Name and return to the Grid or Seq List Items menu, or ESC to cancel entering the Grid or Seq Name (File Name). Creating a Note Grid/Seq Log Note: Can contain a combination of up to 20 numeric, alpha, or special characters listed in the first section of this chapter.
DFX-7 Ultrasonic Flaw Detector 3) Use the UP, DOWN, LEFT, & RIGHT arrow keys to highlight the appropriate alpha characters. 4) Press the ENTER key to select a character and advance to the next field of the Grid or Seq Note. 5) Use the CLR key to backspace if necessary. 6) Repeat steps 3 through 5 until the Grid or Seq Note is completed. 7) Press the OK key to save the Grid or Seq Note and return to the Grid or Seq List Items menu, or ESC to cancel entering the Grid or Seq Note.
Dakota Ultrasonics Sequential: The sequential file format can be viewed as a file as a single column of up to 512 possible rows (readings), and a column of corresponding identifiers associated with each individual reading. The identifier can be a combination of up to 10 numeric, alpha, or special characters listed above, while the file name can consist of a combination of up to 20 of the same character set. Note: The identifier cannot start or end with a special character.
DFX-7 Ultrasonic Flaw Detector Grid Log Sequential Log 3) GRID LOG: Use the LEFT, & RIGHT arrow keys to scroll the Columns, and the UP, DOWN arrow keys to scroll the Rows. SEQ LOG: Use the UP, DOWN, LEFT, & RIGHT arrow keys to highlight the appropriate alpha characters. Press the ENTER key to select a character and advance to the next character field, in conjunction with using the CLR key to backspace if necessary.
Dakota Ultrasonics Grid Log Sequential Log 1) Use the UP and DOWN arrow keys to scroll through the new Grid or Seq List Items until LOWER RIGHT or END ID is highlighted. 2) Press the ENTER key to activate the Coordinate or End ID Edit Box. Grid Log Sequential Log 3) GRID LOG: Use the LEFT, & RIGHT arrow keys to scroll the Columns, and the UP, DOWN arrow keys to scroll the Rows. SEQ LOG: Use the UP, DOWN, LEFT, & RIGHT arrow keys to highlight the appropriate alpha characters.
DFX-7 Ultrasonic Flaw Detector and advance to the next character field, in conjunction with using the CLR key to backspace if necessary. 4) Press the OK key to select the coordinate or end ID and return to the Grid or Seq List Items screen, or ESC to cancel the selection and return to the Grid or Seq List Items menu. Note: If there is not enough memory available to create the grid or sequential log, an error message box “NOT ENOUGH MEMORY“ will be displayed.
Dakota Ultrasonics Selecting the Auto Increment Direction The Auto Increment feature gives the user the ability to specify which direction to advance the cursor after storing a reading. Grid Log Sequential Log 5) Use the UP and DOWN arrow keys to scroll through the new Grid or Seq List Items until INCR. DIR or DIRECTION is highlighted. 6) Use the LEFT & RIGHT arrow keys to toggle the Increment direction NONE, NORTH, EAST, SOUTH, or WEST for a grid, or INC, DEC for a sequential log.
DFX-7 Ultrasonic Flaw Detector Saving Graphics The DFX-7 provides the user with the ability to save a snapshot of the display screen and all the current settings of the DFX-7 with every reading, or just save the reading only. Saving the graphics might be advantageous to the user when the A-Scan views will be used to graphically save a picture of the scanned areas for reporting purposes. It might also come in handy when user requires backup of all the current DFX-7 parameters for each reading.
Dakota Ultrasonics Saving a Grid Once all the parameters are set, the user has the option of saving or canceling the new grid. Grid Log Sequential Log 4) Use the UP and DOWN arrow keys to scroll through the new Grid or Seq List Items until CREATE GRID or LOG? is highlighted. 5) Press the ENTER key to accept the grid or seq log parameters and activate the confirmation screen.
DFX-7 Ultrasonic Flaw Detector Grid Log Sequential Log 6) Press the OK key to save the New Grid or Seq Log, or the ESC key to cancel the New Grid or Seq Log setup and return to the DATA menu. 7) Press the MEAS key to return to the measurement screen and begin storing readings. 12.3 Storing a waveform Now that a grid or sequential log has been created, it’s time to make some store some waveforms.
Dakota Ultrasonics Grid Log Sequential Log 1) Press the UP, DOWN, LEFT, and RIGHT arrow keys to scroll the target cell cursor to the desired storage location. 2) Press the ENTER key to save the current reading in the highlighted cell location. It’s as simple as that! 3) Press the MEAS key to hide the GRID/SEQ View Box, or ENTER to display it as necessary. Note: Once the file is open, it will remain open until it’s closed or another file is opened by the user.
DFX-7 Ultrasonic Flaw Detector Viewing Stored Waveforms Grid Log Sequential Log 1) Press the MEAS key once to activate measure menu items. Press the MEAS key multiple times to move right and the ESC key multiple times to move left until the LOG cell is highlighted. 2) Press the ENTER key to display the Grid Log Box. 3) Press the UP, DOWN, LEFT, and RIGHT arrow keys to scroll the stored readings and corresponding display view.
Dakota Ultrasonics 5) Abort the Grid/Seq Log View Box by pressing the MEAS key at any time. 12.5 Deleting Grids (Files) Deleting One or All Files from Memory Deleting One File 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 multiple times to tab left until the DATA menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until DELETE ONE FILE is highlighted.
DFX-7 Ultrasonic Flaw Detector 3) Press the ENTER key to display the File List Box. 4) Use the UP and DOWN arrow keys to scroll through the stored Files until the target File to delete is highlighted. 5) Press the OK key to delete the File. 6) Press the MEAS key to return to the measurement screen. Deleting All Data 1) Press the MENU key once to activate the menu items tab.
Dakota Ultrasonics 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until DELETE ALL DATA is highlighted. 3) Press the ENTER key to activate the confirmation screen. 4) Press the OK key to delete All Files from memory, or the ESC key to abort. 5) Press the MEAS key to return to the measurement screen.
DFX-7 Ultrasonic Flaw Detector 12.6 Editing a Grid (File) Once a grid has been created and saved to memory, the user can edit the Comments or Increment Direction at a later time. The following procedures outline this process: Editing a Grid 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 multiple times to tab left until the DATA menu is highlighted and displaying the submenu items.
Dakota Ultrasonics 5) Press the ENTER key to activate the Alpha Edit box – Only used when editing the NOTE. 6) Use the UP, DOWN, LEFT, & RIGHT arrow keys to highlight the appropriate alpha characters. 7) Press the ENTER key to select a character and advance to the next field of the Comments. 8) Use the CLR key to backspace if necessary. 9) Repeat steps 6 - 8 until the Comments are completed.
DFX-7 Ultrasonic Flaw Detector 10) Press the UP or DOWN arrow key to highlight SAVE CHANGES, and the OK key to activate the confirmation screen. 11) Press the OK key to save the changes or the ESC key to cancel editing the file parameters. 12) Press the MEAS key to return to the measurement screen. 12.7 Changing the active File - Open The user may have transferred grid/seq templates from a PC to the DFX-7, or setup grids/seq using the DFX-7 at an earlier time.
Dakota Ultrasonics Grid Log Sequential Log 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 multiple times to tab left until the DATA menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until OPEN is highlighted. 3) Press the ENTER key to display the Grid/Seq List Box.
DFX-7 Ultrasonic Flaw Detector 5) Press the ENTER key to activate the confirmation screen. 6) Press the OK key to load the file from memory. 7) Press the MEAS key to return to the measure screen. 12.8 Closing an active File - Close A user might not have a current requirement to store measurements, but a file is currently open or active and needs to be closed.
Dakota Ultrasonics 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until CLOSE is highlighted. 3) Press the ENTER key to close the active file. Note: Following the key press, the CLOSE text will be grayed out indicating the file has been close and is no longer active.
CHAPTER THIRTEEN SETUPS – CREATE, STORE, EDIT, & RECALL 13.1 Introduction to Setups Often times, users are faced with a variety of tasks and applications that are sometimes similar, but can also be very different. Without the ability to save the individual calibrations and setups, the user would have to repeat the setup process on a regular basis for each individual application.
Dakota Ultrasonics Opening a Setup 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 multiple times to tab left until the SETUP menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until OPEN is highlighted. 3) Press the ENTER key to display the Setup List Box. 4) Use the UP and DOWN arrow keys to scroll through the setups until the target setup is highlighted.
DFX-7 Ultrasonic Flaw Detector 5) Press the ENTER key to activate the confirmation screen. 6) Press the OK key to load the setup from memory. 7) Press the MEAS key to return to the measure screen. 13.3 Saving a Setup Once the DFX-7 parameters and features have be adjusted for an application, the user may elect to save these setting to a specific setup location for future use. This can potentially save time and reduce error between users.
Dakota Ultrasonics Saving a Setup 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 multiple times to tab left until the SETUP menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until SAVE is highlighted. 3) Press the ENTER key to display the Save Setup Parameters List Box. 4) Press the UP and DOWN arrow keys to scroll the Name and Note parameters.
DFX-7 Ultrasonic Flaw Detector 5) When the parameter to edit is highlighted, press the ENTER key to activate the Alpha Edit Box. 6) Use the UP, DOWN, LEFT, and RIGHT arrow keys to scroll through the characters, the ENTER key to select characters, and the CLR key to backspace through the characters, until the Name or Note fields have been edited. 7) Press the OK key to return to the Save Setup Parameters List Box. 8) If both parameters will be edited, repeat steps 4 – 7.
Dakota Ultrasonics 11) Use the UP and DOWN arrow keys to scroll through the setups until the target location to save the Setup is highlighted. 12) Press the OK key to activate the confirmation screen. 13) Press the OK key to save the Setup, or ESC to cancel saving the Setup. 14) Finally, press the MEAS key to return to the measurement screen. Note: The Name and Comments of the Setup can be edited at any time by simply repeating the Save Setup routine described above.
DFX-7 Ultrasonic Flaw Detector Deleting a Setup 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 multiple times to tab left until the SETUP menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until DELETE is highlighted. 3) Press the ENTER key to display the Setups List. 4) Press the UP and DOWN arrow keys to scroll to the Setup Name.
Dakota Ultrasonics 5) When the Setup Name is highlighted, press the ENTER key to display the confirmation screen. 6) Press the OK key to delete the Setup File. 7) Finally, press the MEAS key to return to the measurement screen. 13.5 Using the Default Setup The default setup feature was added to the DFX-7 to use, as a last resort, if there are no setups stored in the gauge –factory or otherwise.
DFX-7 Ultrasonic Flaw Detector Using the Default Setup 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 multiple times to tab left until the SETUP menu is highlighted and displaying the submenu items. 2) Use the UP and DOWN arrow keys to scroll through the sub menu items until DEFAULT SETUP is highlighted.
Dakota Ultrasonics 13.6 Selecting a Language The DFX-7 is equipped with a language option. Currently, the only languages supported are English, Spanish, and German. The steps to select one of these languages are outlined as follows: Selecting a Language 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 multiple times to tab left until the SETUP menu is highlighted and displaying the submenu items.
CHAPTER FOURTEEN USING THE UTILITY SOFTWARE 14.1 Computer System Requirements DakView will run on many different operating systems: Windows XP, Windows 2000 Professional, Windows 2000 Server, Windows 2000, Vista, or Windows 7 Advanced Server operating systems running on Intel or AMD hardware. A Pentium 166MHz or faster processor with at least 32 megabytes of physical RAM is required. You should have 40 megabytes of free disk space before attempting to install DakView.
Dakota Ultrasonics 14.3 Using the XFER menu (DFX-7) The XFER menu of the DFX-7 will be used in conjunction with the DakView PC software. The steps below outline the procedure for accessing the XFER menu and basic operation as follows: Accessing and Using the XFER Menu 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 multiple times to tab left, until the XFER menu is highlighted and displaying the submenu items.
APPENDIX A VELOCITY TABLE Material Aluminum Beryllium Brass Bronze Cadmium Columbium Copper Glass (plate) Glycerine Gold Inconel Iron Cast Iron Lead Magnesium Mercury Molybdenum Monel Nickel Nylon Platinum Plexiglas Polystyrene PVC Quartz glass Rubber vulcanized Silver Steel (1020) Steel (4340) L-Wave velocity in/µs L-Wave velocity m/s 0.2510 0.5080 0.1730 0.1390 0.1090 0.1940 0.1830 0.2270 0.0760 0.1280 0.2290 0.2320 0.1800 0.0850 0.2300 0.0570 0.2460 0.2110 0.2220 0.1060 0.1560 0.1060 0.0920 0.0940 0.
Dakota Ultrasonics Steel Stainless" Teflon Tin Titanium Tungsten Uranium Water Zinc Zirconium 0.2230 5664 .1230 3120 0.0540 0.1310 0.2400 0.2040 0.1330 0.0580 0.1660 0.1830 1372 3327 6096 5182 3378 1473 4216 4648 .2500 .0660 .1230 .1130 .0780 .0950 .
APPENDIX B SETUP LIBRARY Num Name 1 2 3 4 5 6 … Enter Custom Name … … … … … … Comment 1 149 Gn/AGC Velocity
WARRANTY INFORMATION Warranty Statement Dakota Ultrasonics warrants the DFX-7 against defects in materials and workmanship for a period of two years from receipt by the end user. Additionally, Dakota Ultrasonics warrants transducers and accessories against such defects for a period of 90 days from receipt by the end user. If Dakota Ultrasonics receives notice of such defects during the warranty period, Dakota Ultrasonics will either, at its option, repair or replace products that prove to be defective.
