Manual
15
4. Hold the probe for about 2 seconds in this position until the measurement is complete. The device
then sends a signal, which states that the measurement is complete and the measured values
can be read from the display. The first reading is not included in the determination of the average
value.
Note:
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Normally five measurements, made within 645 mm² suffice to get usable results. If the test
material is very inhomogeneous you should make more than five measurements to get usable
results.
-
In case you changed the amount of the single measurements in the settings, you need to stick to
that setting. Otherwise the measurement is not completed.
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The ultrasonic hardness meter is a highly precise instrument. Take care to always hold the probe
with two hands in the vertical position. Do not put the probe under different pressure and take
care that no impacts occur during measurements. When lifting the probe pay attention that you
do not scratch the material with the diamond.
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Check the accuracy and the repeatability regularly. Use the calibration standard which is
delivered with the instrument. To check the characteristics you need to perform 5 measurements
as described above and compare the results that are noted on the calibration standard. If the
deviations should be too big, you need to calibrate the instrument.
