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5.4.2 Calibration at known sound velocity
Note: For this procedure, the sound velocity of the material to be measured must be
known. A table of the most common materials can be found in Appendix A of this
manual.
1. Press the key
2. You can switch between the preset sound velocities with the key.
3. If necessary, the preset sound velocity can be overwritten with the keys
up and down until the desired value of the material to be measured is reached.
This is necessary, for example, if, as already mentioned, there are differences
in the material composition from (manufacturer to manufacturer) for one and the
same material.
4. To exit the calibration mode, press the
be taken.
Another method of calibrating the instrument with a known speed of sound is as
follows:
1. Go to the {Test Set} → {Velocity Set} submenu,
sound velocity menu.
2.
Press the key several times until the changeable numeric digit is reached.
Use the /
corresponds to the speed of sound of the material to be tested.
3. An automatic repeat function is built into the machine so that if the key is held
down, the numerical values add up at equal intervals or decrease in steps.
4. Press the
5. In order to achieve the most accurate measurement results, it is generally
recommended to calibrate the measuring device with a material sample of
known material thickness.
The material composition itself (and thus the speed of sound) often varies from one
manufacturer to another. Calibration with a material sample of known thickness
ensures that the measuring instrument has been adjusted as accurately as possible to
the material to be measured.
TU_US-BA-e-2020
several times to move to the element "Speed of sound".
keys to
change the numerical value up or down until it
key to confirm or the
key. From now on measurements can
press the key to enter the
key to cancel the calibration.
and
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