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

MMX-6 DL Ultrasonic Thickness Gauge

Calibration to a known thickness

Note: This procedure requires a sample piece of the specific material to be measured, the exact thickness of which is known, e.g. from having been measured by some other means.

1)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)Perform a Probe-Zero (refer to page 14)

3)Apply couplant to the sample piece.

4)Press the transducer against the sample piece, making sure that the transducer sits flat against the surface of the sample. The display should show some (probably incorrect) thickness value, and the Stability Indicator should have nearly all its bars on.

5)Having achieved a stable reading, remove the transducer. If the displayed thickness changes from the value shown while the transducer was coupled, repeat step 4.

6)Press the CAL key. The IN (or MM) symbol should begin flashing.

7)Use the UP and DOWN arrow keys to adjust the displayed thickness up or down, until it matches the thickness of the sample piece.

8)Press the CAL key again. The IN/µs (or M/s) symbols should begin flashing. The MMX-6 DL is now displaying the sound

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