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1.16 UCI Probe handling
The protective sleeve of UCI probe serves two purposes: It protects the UCI rod against
damages (as distortion). Furthermore, during the 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 Vickers diamond may touch the surface slightly,
but not for too long (otherwise an error occurs). Then the probe is pressed to the specimen
until the protective sleeve hits the surface. An acoustic signal indicates the completion of the
measurement. To achieve an accurate measurement, the probe must be pressed steadily and
vertically onto the specimen. The load is set by the built in the probe controlled load spring.
To facilitate the pressing, probe supports (separately available) can be screwed instead
of the protective sleeve onto the probe. These probe supports are available for flat and convex
surfaces. On supply the UCI probe has calibration only for steel.
The distance between the imprint center and the edge of the specimen or adjacent
indentation should be at least 2.5 diagonal length imprint
1.17 Rebound Leeb Probe handling
Set the probe onto the surface of the material at the zone of control (Fig. 1.3).
Hold the bottom part of the probe housing with one hand, and charge the spring of the
probe by mowing the upper part of the housing down with the other hand (Fig. 1.4).
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