Dakota Digital MMX-6 operation manual Calibration to a known velocity

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MMX-6 DL Ultrasonic Thickness Gauge

Calibration to a known velocity

Note: This procedure requires that the operator know the sound- velocity of the material to be measured. A table of common materials and their sound-velocities can be found in Appendix C.

1)Make sure the MMX-6 DL is on and switched to P-E(pulse-echo) mode. Press the Dual-Multikey to toggle modes.

Note: The calibration function has been disabled in E-E(echo-echo) mode. If the CAL key is pressed while in E-Emode, “nO” followed by “CAL” will be displayed.

2)Press the CAL key to enter calibration mode. If the IN (or MM) symbol is flashing, press the CAL key again, so that the IN/µs (or M/s) symbols are flashing.

3)Use the UP and DOWN arrow keys to adjust the displayed velocity up or down, until it matches the sound-velocity of the material to be measured.

4)Press the CAL key once more to exit the calibration mode. The MMX-6 DL is now ready to perform measurements.

NOTE: At any time during the calibration procedure (IN, MM, IN/µs, or M/s flashing in the display), pressing the PRB-0key will restore the tool to the factory default sound-velocity for steel (0.233 IN/µs).

To achieve the most accurate measurements possible, it is generally advisable to always calibrate the MMX-6 DL to a sample piece of known thickness. Material composition (and thus, its sound-velocity) sometimes

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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 / MMBack light Using The Back LightScan Mode 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 aMeasuring hot surfaces Appendix BApplication Notes Measuring pipe and tubing Measuring laminated materials Measuring Through Paint & Coatings Blank Sound Velocities of some Common Materials Appendix CBlank Warranty Statement Warranty Information
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