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5) Press
the "H1" symbol will appear on the display, and the "mm" symbol will start flashing.
6) Remove the transducer from the sample piece.
7) Using
it matches the actual (true) thickness of the sample piece.
8) Press
calibration sample will be displayed in the main indicator field, the "V" symbol will
appear, and in a short period of time the "V" symbol will change to "M" symbol, the
"m/s" symbol will change to "mm" symbol, and the main indicator field will show the
resulting measured thickness (Fig. 10).
The thickness gauge is now ready to perform measurements.
Note - After the calibration is completed, the ultrasound velocity value will be
saved to the memory of the thickness gauge, and will be used for further
measurements.
4.9 Two point calibration of the thickness gauge
Note - Two sample pieces of a known thickness are required to perform the two-
point calibration of the thickness gauge.
For the two-point calibration, please perform the following actions:
1) Plug an appropriate transducer into the thickness gauge using the
connecting cable.
2) Switch the thickness gauge ON by pressing
3) Press the transducer against the 1
wetted with couplant, making sure that the transducer sits flat against the surface of
the 1
sample. The Stability Indicator should have nearly all vertical bars on.
st
key, after which the main indicator will show the thickness value,
and
keys, adjust the displayed thickness up or down, until
key, after which the calculated ultrasound velocity of the
Fig. 10
button.
sample of a known thickness prior
st
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