Dakota-ultrasonics MMX-6 Manuel d'utilisateur

OPERATION MANUAL DAKOTA ULTRASONICS - MMX-6 MULTI-MODE ULTRASONIC THICKNESS GAUGE P/N P-142-0002 Rev 1.10 / 1.11, January 2008

Dakota Ultrasonics 6The Display The numeric portion of the display consists of 4 complete digits preceded by a leading "1", and is used to

MMX-6 Ultrasonic Thickness Gauge 7 When the IN symbol is on, the MMX-6 is displaying a thickness value in inches. The maximum thickness that can be

Dakota Ultrasonics 8The Transducer The transducer is the "business end" of the MMX-6. It transmits and receives ultrasonic sound waves tha

MMX-6 Ultrasonic Thickness Gauge 9 This is a top view of a typical transducer. Press against the top with the thumb or index finger to hold the tran

Dakota Ultrasonics 10If the Stability Indicator has fewer than five bars darkened, or the numbers on the display seem erratic, first check to make su

MMX-6 Ultrasonic Thickness Gauge 11Condition and Preparation of Surfaces In any ultrasonic measurement scenario, the shape and roughness of the test

Dakota Ultrasonics 12Probe Zero Setting the Zero Point of the MMX-6 is important for the same reason that setting the zero on a mechanical micrometer

MMX-6 Ultrasonic Thickness Gauge 136) While the transducer is firmly coupled to the probe-disc, press the PRB-0 key on the keypad. The MMX-6 will d

Dakota Ultrasonics 14point calibration is the simplest and most commonly used calibration procedure - optimizing linearity over large ranges. The tw

MMX-6 Ultrasonic Thickness Gauge 15 display should show some (probably incorrect) thickness value, and the Stability Indicator should have nearly a

Copyright  2008 Dakota Ultrasonics. All rights reserved. No part of this publication may be reproduced, translated into another language, stored in

Dakota Ultrasonics 16Note: The calibration function has been disabled in E-E (echo-echo) mode. If the CAL key is pressed while in E-E mode, “nO” fo

MMX-6 Ultrasonic Thickness Gauge 17Two Point Calibration NOTE: This procedure requires that the operator has two known thickness points on the test

Dakota Ultrasonics 188) Press the Probe key. The display will flash 1OF2. Repeat steps 3 through 8 on the second calibration point. The MMX-6 wil

MMX-6 Ultrasonic Thickness Gauge 19When the MMX-6 is not in calibration mode, press the UP arrow key to turn Scan Mode on and off. A brief message w

Dakota Ultrasonics 20 Alarm Mode 1) Press ON/OFF key to power up the MMX-6. 2) Press the ALRM key. ALAr OFF, or ALAr followed by a thickness value

MMX-6 Ultrasonic Thickness Gauge 21However, In order to inspect for blind wall pitting and internal flaws, both echo-echo (thru-paint / coatings), an

Dakota Ultrasonics 22RS232 Serial Port The MMX-6 is equipped with an RS232 serial port. Using the accessory cable (part# N-306-0010), the MMX-6 has

MMX-6 Ultrasonic Thickness Gauge 23NOTE: Communications software packages generally have the ability to capture the screen data to a common text fil

Dakota Ultrasonics 24TRANSDUCER SELECTION The MMX-6 is inherently capable of performing measurements on a wide range of materials, from various metal

MMX-6 Ultrasonic Thickness Gauge 25Higher frequency ultrasound is absorbed and scattered more than ultrasound of a lower frequency. While it may see

MMX-6 Ultrasonic Thickness Gauge CONTENTS INTRODUCTION OPERATION THE KEYPAD THE DISPLAY THE TRANSDUCER MAKING MEASUREMENTS CONDITION AND PREPARATION

Dakota Ultrasonics 26with a variety of transducers in order to find one that works well for a given job. Dakota Ultrasonics can provide assistance i

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Dakota Ultrasonics 28APPENDIX A Product Specifications Physical Weight: 10 ounces Size: 2.5W x 4.75H x 1.25D inches (63.5W x 120.7H x 31.8D

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Dakota Ultrasonics 30 APPENDIX B Application Notes • Measuring pipe and tubing When measuring a piece of pipe to determine the thickness of the pipe

MMX-6 Ultrasonic Thickness Gauge 31above this point, the change in sound velocity of the material being measured starts to have a noticeable effect u

Dakota Ultrasonics 32An additional important consideration when measuring laminates, is that any included air gaps or pockets will cause an early ref

MMX-6 Ultrasonic Thickness Gauge 33 blank page

Dakota Ultrasonics 34APPENDIX C Sound Velocities of some Common Materials Material sound velocityin/usm/sAluminum0.2506350Bismuth 0.086 2184Brass0.17

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Dakota Ultrasonics DISCLAIMER – Very Important! Inherent in ultrasonic thickness measurement is the possibility that the instrument will use the seco

Dakota Ultrasonics 36 WARRANTY INFORMATION • Warranty Statement • Dakota Ultrasonics warrants the MMX-6 against defects in materials and workmanshi

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

MMX-6 Ultrasonic Thickness Gauge 1 INTRODUCTION The Dakota Ultrasonics model MMX-6 is a multi-mode Ultrasonic thickness gauge. Based on the same op

Dakota Ultrasonics 2 OPERATION The MMX-6 interacts with the operator through the membrane keypad and the LCD display. The functions of the various k

MMX-6 Ultrasonic Thickness Gauge 3 The PRB-0 key is used to "zero" the MMX-6 in much the same way that a mechanical micrometer is zeroed.

Dakota Ultrasonics 4The UP arrow key has two functions. When the MMX-6 is in calibration mode, this key is used to increase numeric values on the di

MMX-6 Ultrasonic Thickness Gauge 5 The ALRM key has two functions. By holding down the ALRM key when powering up the MMX-6, the audible beeper will