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3 Information on the probes
3.1 Probe selection
alphaDUR UCI probes are available with test loads of 10, 20, 30, 49 and 98 N.
This corresponds to the Vickers test loads HV1, HV2, HV3, HV5 and HV10 (1,
2, 3, 5 and 10 kg). Like that the optimal test load for a particular test task can
be chosen.
Cable
connector
Protective
sleeve
Oscillating rod with
Vickers diamond
Fig. 1
the probe is pressed to the specimen until the protective sleeve hits the
surface. An acoustic signal indicates the completion of the measurement. To
INFORMATION ON THE PROBES
For rough surfaces higher test loads are
recommended
indentations. If many measurements follow
one another, tests could be difficult without
using a bench stand to apply test loads like
10 kg steadily and vertically.
3.2 Probe handling
The protective sleeve serves two purposes:
It protects the UCI rod against damages (as
distortion).
Furthermore,
measurements, it functions as a mechanical
stop for the deflection of the rod.
To carry out a measurement, the probe must
be held perpendicular to the specimen
surface. (The alphaDUR mini has to be
calibrated to the material and must be in
measuring mode.) The Vickers diamond
may touch the surface slightly, but not for
too long (otherwise an error occurs). Then
to
create
during
greater
the
7
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