Dakota Digital CMX operation manual Chapter Nine PULSE-ECHO Coating & Coating Techniques

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CHAPTER NINE

PULSE-ECHO COATING & COATING TECHNIQUES

9.1 Introduction to Pulse-Echo Coating Measurement (PECT)

In the previous sections we’ve discussed the need for detecting pits and flaws (pulse- echo) in materials, along with the requirement to measure through and eliminate errors caused by coated materials (echo-echo). Until now, both modes were needed in order accomplish both tasks. Pulse-echo mode was used for flaw detection, and echo-echo mode was used to eliminate the coating thickness and provide a nominal material thickness only. With this in mind, it often became cumbersome toggling between both modes respectively.

In a majority of applications involving coated materials, inspectors are often interested in monitoring both the thickness of the material, as well as the thickness of the coating . Therefore, the CMX has been designed to provide the user with the ability to measure the material and coating thicknesses simultaneously, while maintaining the ability to detect flaws and pits all in a single mode called Pulse-Echo Coating (PECT). This is accomplished by using a custom hybrid combination mode utilizing properties from the basic modes along with a group of special techniques and theoretical wave phenomena’s.

The CMX is preset to a coating velocity of 0.0850 in/µsec (2159 m/sec) from the factory. This velocity is a very close approximation of the common coating velocities found in the field. However, the CMX also has a built-in one and two point calibration options to calibrate to coating samples with a known thicknesses.

There are two coating modes built into the CMX:

1)Pulse-Echo Coating (PECT) – used during inspections where both the material and coating thicknesses are required.

2)Coating Only (CT) – used during inspections where only the coating thickness is required.

9.2Enabling Pulse-Echo Coating Mode (PECT) & Coating (CT)

When the CMX is initially powered up, the gauge will automatically check to see if the transducer plugged into the gauge can be recognized. All Dakota Ultrasonics coating enabled transducers are equipped with the auto recognition feature. If the CMX doesn’t recognize tha t a special coating enabled transducer is plugged into the gauge, the coating feature will be disabled entirely. There are a number of coating enabled transducers available from Dakota. Please contact us with your application requirements for additional information on frequencies and diameters currently offered.

The coating modes can be enabled in three different ways:

1)On Power up and probe recognition.

2)By pressing MULTI MODE keypad.

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Contents CMX Page Appendix a Setup Library Page Chapter ONE Introduction DisclaimerChapter TWO Quick Startup Guide CMX OverviewPage Auto Probe Recognition Probe Automatically RecognizedSelecting the Transducer Type Selecting the Transducer Type Probe Zero & Calibration Performing an Auto Probe Zero Off Block Coating Probe Identified Coating Probe Not IdentifiedPerforming a Manual Probe Zero On Block One Point Material Calibration Using a Known Thickness Zero Coating Performing a Coating Zero Coating Calibration Using a Known Coating Velocity Known Coating VelocityUsing a Coating Sample to Calibrate Known Coating ThicknessPage Measure Selecting the Measurement View OptionAdjusting B-START & B-DEPTH Digit Edit Box as follows Digits Chapter Three KEYBOARD, MENU, & Connector Reference Menu Key Operation & Sub MenusActivating and Getting Around in the Menu Items Getting Around in the Sub Menu ItemsProbe Menu CAL MenuDisp display Menu Tune MenuSetup Menu Util utilities MenuCLR clear Key Meas measurement mode KeyXfer transfer Menu OK KeyEnter key Multi Mode KeyArrow Keys 16 ON/OFF KeyRS-232 Connector Transducer ConnectorsProbe Zero Disk & Battery Cover Top & Bottom End CapsSuitability of materials Chapter Four Principals of Ultrasonic MeasurementTime versus thickness relationship Range of measurement and accuracyTemperature Measurement ModesEcho-Echo Mode Thru-Paint E-E Path CorrectionCoating Mode Coating Only CT Pulse-Echo Temperature Compensated Mode Temp Comp Petp Setup library Chapter Five Selecting the Measurement ModeWhich mode & transducer do I use for my application? Coating Only High temperatureThru Paint & Coatings Thin materialsFactory Setup Chart Restricted accessChapter SIX Making Measurements Auto Probe Recognition & Selecting The Transducer TypeProbe Automatically Recognized Selecting the Transducer Type Page Probe zero Coating Probe Identified Coating Probe Not IdentifiedPerforming a Manual Probe Zero On Block Coating Probe Identified Coating Probe Not Identified Material Calibration Using a Known Material VelocityKnown Velocity Page Page Known Thickness One Point CalibrationPage Two Point Calibration Basic Material Type Selecting a Basic Material Type Page Chapter Seven Using the Digits & B -SCAN Displays Display Views Digits ViewScan Scan ViewPage Enabling the B-Scan Feature Activating B-Scan ViewAdjusting the B-Scan Start B-START & Depth B-DEPTH Starting depth B -STARTAdjusting the Starting Depth B-START Adjusting the Overall Depth B-DEPTH Overall range B-DEPTHPage Gain Adjusting the Gain Chapter Eight Thru Paint Measurement Technique Using Thru Paint ModeIntroduction to Thru Paint Measurement Chapter Nine PULSE-ECHO Coating & Coating Techniques Enabling Pulse-Echo Coating Mode Pect & Coating CTCoating modes can be enabled in three different ways Introduction to Pulse-Echo Coating Measurement PectProbe Automatically Recognized Pect only Multi Mode Key Pressed Pect & CT Applied to Metals Not Applied to MetalsMeasure Mode Tabbed Menus Pect & CT Zero Coating Page Coating Calibration Pect Known Velocity Page Known Thickness Page Introduction to Coating Measurement CT Two Point Coating Calibration CT Known ThicknessOne Point Calibration Page Two Point Calibration Page Using the Scan Mode Chapter TEN Additional Features of the CMXHigh Speed Scan Alarm Mode Toggle Alarm on/offSetting the Alarm Low Limit Differential Mode Toggle Differential on/offSetting the Differential Value Introduction to Setups Chapter Eleven Setups CREATE, STORE, EDIT, & RecallOpening a Setup Opening a Setup Saving a Setup Saving a Setup Page Page Deleting a Saved Setup Deleting a SetupUsing the Default Setup Using the Default Setup Selecting a Language Computer System Requirements Chapter Twelve Using the Utility SoftwareInstalling DakView USB to Serial ConverterUsing the Xfer menu CMX Accessing and Using the Xfer MenuAppendix a Velocity Table PVCCMX High Performance Material & Coating Thickness Gauge Appendix a Setup Library

CMX specifications

Dakota Digital CMX series represents a cutting-edge advancement in the world of digital instrumentation, designed specifically for automotive enthusiasts and restorers seeking to enhance their vehicle’s dashboard aesthetics and functionality. Characterized by its sleek appearance and intelligent design, the CMX offers a multitude of features that cater to modern demands while preserving the classic vehicle feel.

One of the standout features of the Dakota Digital CMX is its customizable display. The series provides an array of screen layouts and color schemes that allow users to personalize their instrumentation according to individual preferences. This flexibility not only enhances the visual appeal but also aids in quickly obtaining critical information at a glance, improving overall driver convenience.

The CMX is equipped with state-of-the-art technology, including high-definition OLED displays that ensure crisp visibility in all lighting conditions. This technological advancement makes the instrument panel not only easy to read but also optimally functional in both bright sunlight and low-light situations. The ambient light sensors adjust brightness automatically, promoting user comfort.

Another defining characteristic of the Dakota Digital CMX is its comprehensive data logging and diagnostic capabilities. Integrated advanced sensors enable real-time monitoring of various vehicle metrics, such as speed, RPM, fuel level, and engine temperatures. This feature aids users in maintaining their vehicle's performance and in diagnosing potential issues before they escalate into more severe problems.

The CMX series supports numerous vehicle types, with a compatibility range that includes classic muscle cars, street rods, and even motorcycles. Furthermore, it incorporates Bluetooth technology, allowing users to connect their smartphones for further customization and real-time data analysis via an associated app.

Installation is designed to be user-friendly, making it accessible even for those with limited automotive knowledge. The system typically utilizes plug-and-play wiring harnesses, simplifying the overall setup process. Additionally, the CMX series is engineered to withstand the harsh environments often found in automotive applications, ensuring durability and longevity.

In summary, the Dakota Digital CMX series exemplifies a harmonious blend of modern technology and classic style. With customizable displays, advanced diagnostics, excellent visibility, and robust construction, it is a top choice for those looking to elevate their vehicle’s instrumentation. The CMX not only provides essential information but also transforms the driving experience, making it both informative and enjoyable.
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