Manual
8
6.1.2
Coupling
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The coupling surface between test object and base plate should be flat, levelled and straight.
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Apply a thin and evenly layer of coupling compound to the contact surface of the test object.
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Press the test object tightly onto the subsurface by turning it.
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The direction of impact should be vertical to the coupled surface.
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The minimum thickness of the coupling sample is 5 mm.
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In order to perform reliable measurements, the test objects need to be coupled correctly. If that is
not the case there discrepancies between the measurements. In addition to that the Leeb-values
may be too little and differ and there may be rattling noises when the impactor hits the test object.
6.2
Operation diagram
