Dakota Digital MMX-6 operation manual Appendix B, Application Notes Measuring pipe and tubing

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MMX-6 DL Ultrasonic Thickness Gauge

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. If the diameter of the pipe is larger than approximately 4 inches, measurements should be made with the transducer oriented so that the gap in the wearface is perpendicular (at right angle) to the long axis of the pipe. For smaller pipe diameters, two measurements should be performed, one with the wearface gap perpendicular, another with the gap parallel to the long axis of the pipe. The smaller of the two displayed values should then be taken as the thickness at that point.

Perpendicular Parallel

•Measuring hot surfaces

The velocity of sound through a substance is dependant upon its temperature. As materials heat up, the velocity of sound through them decreases. In most applications with surface temperatures less than about 200°F (100°C), no special procedures must be observed. At temperatures

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Contents Dakota Ultrasonics Dakota Ultrasonics Contents Disclaimer Very Important Introduction Blank Keypad OperationDakota Ultrasonics MMX-6 DL Ultrasonic Thickness Gauge Dakota Ultrasonics Display Dakota Ultrasonics Is currently operating in echo-echo Thru-paint/coating mode Transducer Making Measurements Dakota Ultrasonics Condition and Preparation of Surfaces Performing a Probe-Zero Probe ZeroCalibration Dakota Ultrasonics Calibration to a known thickness Dakota Ultrasonics Calibration to a known velocity Dakota Ultrasonics Two Point Calibration Units in/mm MMX-6 DL Modes Changing Units in / MMScan Mode Using The Back LightBack light Alarm Mode Using Scan ModeUsing the Beeper Dual-Multi Mode RS232 Serial Port & The Data Logger Connecting To a ComputerUsing The Data Logger Using the Data Logger Clearing a Storage Location Clearing an Entire File Sending All Files to a Computer Clearing all FilesPrinting a File Transducer Selection MMX-6 DL Ultrasonic Thickness Gauge Dakota Ultrasonics Blank Keypad Product Specifications PhysicalPower Source Appendix aApplication Notes Measuring pipe and tubing Appendix BMeasuring hot surfaces Measuring laminated materials Measuring Through Paint & Coatings Blank Sound Velocities of some Common Materials Appendix CBlank Warranty Statement Warranty Information