Related Manuals for DAKOTA ULTRASONICS Z-302-0001
Summary of Contents for DAKOTA ULTRASONICS Z-302-0001
- Page 1 OPERATION MANUAL DAKOTA ULTRASONICS Ultrasonic Thickness Gauge P/N P-302-0002 Rev 1.10, March 2019 1.800.561.8187 information@itm.com www. .com...
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Page 2: Table Of Contents
CONTENTS CHAPTER ONE INTRODUCTION ..............1 1.1 D ......................... 1 ISCLAIMER CHAPTER TWO KEYPAD, MENU, DISPLAY & CONNECTORS ..... 2 2.1 ON/OFF/ENTER K … ..................... 2 2.2 PRB 0 K … ........................2 2.3 CAL K ….......................... 3 2.4 GAIN K …. - Page 3 6.6 P ......................27 ROBE IAMETER 6.7 L ..........................28 6.8 F ......................29 ACTORY EFAULTS APPENDIX A - VELOCITY TABLE ..............31 APPENDIX B- APPLICATION NOTES ............33 1.800.561.8187 information@itm.com www. .com...
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Page 4: Chapter One Introduction
CHAPTER ONE INTRODUCTION The Dakota Ultrasonics model ZX-3 is a basic dual element thickness gauge with the ability to locate blind surface pitting and internal defects/flaws in materials. Based on the same operating principles as SONAR, the ZX-3 is capable of measuring the thickness of various materials with accuracy as high as ... -
Page 5: Chapter Two Keypad, Menu, Display & Connectors
CHAPTER TWO KEYPAD, MENU, DISPLAY & CONNECTORS The Keypad 2.1 ON/OFF/ENTER Key The ON/OFF/ENTER key powers the unit ON or OFF. Since the same key is also used as an ENTER key, the gauge is powered off by pressing and holding down the key until the unit powers off. -
Page 6: Cal Key
ZX-3 Ultrasonic Thickness Gauge 2.3 CAL Key The CAL key is used to enter and exit the ZX-3's calibration mode. This mode is used to adjust the sound velocity value that the ZX-3 will use when calculating thickness. The tool will either calculate the sound-velocity from a sample of the material being measured, or allow a known velocity value to be entered directly. - Page 7 Dakota Ultrasonics The MENU key is used to access and set all of the additional features of the ZX-3 that are not at the top level of the keypad with a dedicated key. The features and setting are outlined in the table below:...
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Page 8: The Display
ZX-3 Ultrasonic Thickness Gauge 2.9 The Display The ZX-3 uses a custom glass LCD backlit low temperature display for use in a variety of climate conditions. It contains graphic icons, as well as both 7 and 14 segment display areas. Let’s take a closer look and what all these things are telling Note: This display is used for multiple gauge models in the ZX &... -
Page 9: The Transducer
Dakota Ultrasonics what material the ZX-3 is currently calibrated too. This area is also used for alpha messages in the menu and edit modes. H. Units: This combination of icons are illuminated in different sequences to inform the user what measurement units are currently being displayed in the small 7 segment area. - Page 10 ZX-3 Ultrasonic Thickness Gauge This is a bottom view of a typical transducer. The two semicircles of the wear face are visible, as is the barrier separating them. One of the semicircles is responsible for conducting ultrasonic sound into the material being measured, and the other semicircle is responsible for conducting the echoed sound back into the transducer.
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Page 11: Top End Cap
Dakota Ultrasonics (size or frequency) for the material being measured. See page 12 for information on transducer selection. While the transducer is in contact with the material that is being measured, the ZX-3 will perform four measurements every second, updating its display as it does so. -
Page 12: Chapter Three Principals Of Ultrasonic Measurement
CHAPTER THREE PRINCIPALS OF ULTRASONIC MEASUREMENT 3.1 Time versus thickness relationship Ultrasonic thickness measurements depend on measuring the length of time it takes for sound to travel through the material being tested. The ratio of the thickness versus the time is known as the sound velocity. In order to make accurate measurements, a sound velocity must be determined and entered into the instrument. -
Page 13: Temperature
Dakota Ultrasonics 3.5 Temperature Temperature has an effect on sound velocity. The higher the temperature, the slower sound travels in a material. High temperatures can also damage transducers and present a problem for various liquid couplants. Since the sound velocity varies with temperature it is important to calibrate at the same temperature as the material being measured. - Page 14 ZX-3 Ultrasonic Thickness Gauge two elements and their delay lines are packaged in a single housing but acoustically isolated from each other with an insulated sound barrier. This allows the transducer the ability to achieve very high sensitivity for detecting small defects. Also, the surface of the test material does not have to be as flat in order to obtain good measurements.
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Page 15: Chapter Four Selecting The Measurement Mode
CHAPTER FOUR SELECTING THE MEASUREMENT MODE 4.1 Which mode & transducer do I use for my application? High penetration plastics and castings The most common mode for these types of applications is pulse-echo. Cast iron applications require 1 - 5MHz frequencies, and cast aluminum requires a 7 - 10MHz frequency depending on the thickness. - Page 16 ZX-3 Ultrasonic Thickness Gauge Noisy Material Materials such as titanium, stainless steel, and aluminum may have inherent surface noise issues or mirroring effect. Higher frequency transducers 7 – 10MHz offer improved resolution to avoid erroneous measurements. Restricted access Measuring materials with extreme curvatures or restricted access are best suited for higher frequencies and smaller diameter transducers.
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Page 17: Chapter Five Making Measurements
CHAPTER FIVE MAKING MEASUREMENTS The steps involved in making measurements are detailed in this section. The following sections outline how to setup and prepare your ZX-3 for field use. An automatic or manual zero must always be performed. The auto zero is an ‘off block’... - Page 18 ZX-3 Ultrasonic Thickness Gauge 2) On Block Zero (Manual Probe Zero) – When this feature is enabled the transducer must be placed on the probe zero disk (battery cover) located on the top of the unit. Both zero procedures are outlined as follows: Performing an Auto Probe Zero (Off Block) 1) Press the key to perform the auto zero.
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Page 19: Material Calibration
Dakota Ultrasonics 2) Be sure all six repeatability/stability bars in the top left corner of the display are fully illuminated and stable, and last digit of the measurement is toggling only +/- .001” (.01mm). 3) Press the key to perform the manual zero. “PRB0” will briefly be displayed on the screen, indicating the zero calculation is being performed. - Page 20 ZX-3 Ultrasonic Thickness Gauge 2) Use the keys to scroll the velocity to the known target value. Note: The longer the keys are pressed and held, the faster the value will increment/decrement. Note: Pressing the key prior to pressing the key will abort the cal routine without saving any changes.
- Page 21 Dakota Ultrasonics Note: A sample or location on the test piece should be used as close to the maximum thickness of the test range to minimize error. 2) Apply a drop of couplant on the transducer and place the transducer in steady contact with the sample or actual test material.
- Page 22 ZX-3 Ultrasonic Thickness Gauge Two Known Thicknesses The two point calibration should be considered when an application requires improved accuracy over a small measurement range based on tolerance requirements. This calibration option calculates both the ‘probe zero’ and ‘velocity value. If the two point option is used, a probe zero is not required. For example, if the measurement range was .080”...
- Page 23 Dakota Ultrasonics 3) Press the key to enter the calibration edit screen displaying the current measurement value. 4) Use the keys to scroll to the known thickness value. Note: The longer the keys are pressed and held, the faster the value will increment/decrement.
- Page 24 ZX-3 Ultrasonic Thickness Gauge thickness values with minimal error. If the thicknesses are not correct, repeat the steps above. Basic Material Type If the material velocity is unknown, a sample thickness cannot be taken directly from the material, but the general type of material is known, selecting a basic material type from the common material (MATL) list in the ZX-3 would offer a reasonable approximation of the thickness.
- Page 25 Dakota Ultrasonics in/µs ALUMINUM 0.250 6350 (2024) 0.233 5918 STEEL (4340) 0.223 5664 STAINLESS (303) 0.180 4572 CAST IRON 0.106 2692 PLEXIGLASS 0.094 2388 0.092 2337 POLYSTYRENE 0.070 1778 POLYURETHANE USER PROGRAMMABLE 3) When the desired MATL setting is displayed, press the key to set the material velocity and return to the measurement screen.
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Page 26: Chapter Six Additional Features
CHAPTER SIX ADDITIONAL FEATURES 6.1 Gain The gain, or amplification of the return echoes, can be adjusted in the ZX-3 to accommodate a variety of materials and applications. The setting of the gain is crucial in order to obtain valid readings during the measurement process. Too much gain may result in erroneous measurements, detecting on noise rather than the actual material back wall surface. -
Page 27: High Speed Scan
Dakota Ultrasonics 1) Press the key to edit the gain setting. The edit icon will be illuminated and flashing. 2) Use the keys to scroll through the gain settings (VLOW, LOW, MED, HIGH, VHI) until the desire setting is being displayed. -
Page 28: Lite
ZX-3 Ultrasonic Thickness Gauge The procedure to select the units is outlined as below: Units 1) Press the key to access the menu items/features. 2) Use the keys to scroll through the items/features until the UNIT feature is being displayed. 3) Press the key to edit the units setting. -
Page 29: Zero
Dakota Ultrasonics 1) Press the key to access the menu items/features. 2) Use the keys to scroll through the items/features until the LITE feature is being displayed. 3) Press the key to edit the light setting. The edit icon will be illuminated and flashing. -
Page 30: Probe Diameter
ZX-3 Ultrasonic Thickness Gauge The procedure to select the zero option only, is outlined below: Zero (Auto/Manual) 1) Press the key to access the menu items/features. 2) Use the keys to scroll through the items/features until the ZERO feature is being displayed. 3) Press the key to edit the zero setting. -
Page 31: Lock
Dakota Ultrasonics Probe 1) Press the key to access the menu items/features. 2) Use the keys to scroll through the items/features until the PROB feature is being displayed. 3) Press the key to edit the diameter setting. The edit icon will be illuminated and flashing. -
Page 32: Factory Defaults
ZX-3 Ultrasonic Thickness Gauge 1) With the ZX-3 powered off, press and hold down the key while powering the ZX-3 on . The lock icon will be illuminated on the display. 2) To unlock the ZX-3 repeat step one, but hold down the key while powering the ZX-3 on 6.8 Factory Defaults... - Page 33 Dakota Ultrasonics 5) Press the key to edit the reset option. 6) Press the keys to toggle YES, followed by pressing to reset the gauge. 7) Repeat the steps above to set “MEDI” & “ZERO” back to their original settings noted in step three above.
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Page 34: Appendix A - Velocity Table
APPENDIX A - VELOCITY TABLE Material sound velocity sound velocity in/us Aluminum 0.2510 6375 Beryllium 0.5080 12903 Brass 0.1730 4394 Bronze 0.1390 3531 Cadmium 0.1090 2769 Columbium 0.1940 4928 Copper 0.1830 4648 Glass (plate) 0.2270 5766 Glycerine 0.0760 1930 Gold 0.1280 3251 Inconel... - Page 35 Dakota Ultrasonics 0.1310 3327 Titanium 0.2400 6096 Tungsten 0.2040 5182 Uranium 0.1330 3378 Water 0.0580 1473 Zinc 0.1660 4216 Zirconium 0.1830 4648 1.800.561.8187 information@itm.com www. .com...
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Page 36: Appendix B- Application Notes
APPENDIX B- APPLICATION NOTES Measuring pipe and tubing When measuring a piece of pipe to determine the thickness of the pipe wall, orientation of the transducers is important. The transducer should be oriented so that the gap (sound barrier) in the wear face is perpendicular (at a right angle) to the length (long axis) of the tubing, allowing both sides of the transducer to make the same amount of contact. - Page 37 Dakota Ultrasonics the probe be left in contact with the surface for as short a time as needed (intermittent contact) to acquire a stable measurement. Measuring laminated materials Laminated materials are unique in that their density (and therefore sound-velocity) may vary considerably from one piece to another. Some laminated materials may even exhibit noticeable changes in sound-velocity across a single surface.
- Page 38 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.