Elcometer NDT MTG6 Guia Del Usuario página 17

8 CALIBRATING YOUR GAUGE (continued)
6 Remove the transducer from the uncoated sample or calibration
standard. The last reading is held on screen. If not
representative, repeat Steps 4-5.
Excessive use of couplant can result in a distorted reading when the

transducer is removed from the surface.
7 Press 'Adjust' and using the
the known thickness value, followed by 'Set' to set the value.
8 Repeat Steps 4-7 using the second uncoated sample or
calibration standard.
Pressing 'Escape' at any time will exit the calibration procedure without

calibrating the gauge.
The derived sound-velocity will be displayed to the right of the display,

below the calibration method icon.
Note: Two point calibration must be performed on material with the paint or
coating removed. Failure to remove the paint or coating prior to
calibration will result in inaccurate readings.
8.3 USING MATERIAL CALIBRATION
The gauge is calibrated using the known sound-velocity of a material
as selected by the user from a pre-defined list stored in the gauge.
This calibration method is useful if uncoated sample test pieces of
known thicknesses are not available.
1 Press the On/Off button to switch the gauge on.
2 Press Menu/Calibration/Cal Method and select 'Material'.
If 'Material' is already selected - the calibration method currently selected

is indicated by the icon to the right of the display - simply press
Menu/Calibration/Calibrate.

3 Use the
by 'Select'.
Pressing 'Escape' at any time will exit the calibration procedure without

calibrating the gauge.
The sound-velocity of the material selected will be displayed to the right

of the display, below the calibration method icon.
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softkeys to highlight the required material followed


softkeys, adjust the reading to

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