5
3.4. Weight of the instrument and probe
Name
Weight, kg
Information processing unit
0,15
UCI probe
0,125
3.5. Power supply
Battery operation: two 1.5V AA cells
Batteries: AlMn (approx.15 hours operation);
Alkaline: at 20° C and max. 500 measurements - 8 hours,
NiCd (approx. 15 hours operation) or NiMH (approx. 20 hours operation)
To save battery charge in the menu there is setting of device auto switch off.
3.6. Requirements of the test material
Surface roughness, not more, Ra
UCI (10N) probe U1
UCI (50N) probe U1
1,5
2,5
Radius of curvature of the surface, mm
UCI probe U1
5
Weight of the test material, not less, kg
UCI probe U1
0,1
Thickness of the test material, not less, mm
UCI probe U1
1
4. Packing list
Information processing unit 1 pc
Probe
UCI (10N) __ pc
UCI (50N) __ pc
Charger 1 pc
Battery 2 pc
USB cable 1 pc
Operation manual 1 pc
Carrying case 1pc
5. Principle of operation
5.1. UCI method
The Vickers diamond is fixed to the tip of a round metal rod. This metal rod is
excited, to its resonant frequency of approx. 78 kHz, into longitudinal oscillations.
When the Vickers diamond contacts the sample surface, the resonant frequency
will change. This change happens in relation to the size of the indent area from the
Vickers diamond. The size, in turn, is a measure for the hardness of the tested
material. Resonant frequencies can be measured very accurately. This is why the
