sauter HK-D, Инструкция по эксплуатации

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14 HK-D_HK-DB-BA-e-2020
Localization
The support ring of the rebound sensor is now pressed firmly onto the surface of the
test piece, whereby the rebound direction should always be vertical to the surface to
be tested.
Testing
- For testing, the release button on the upper side of the rebound sensor is pressed. It
is assumed that the test piece as well as the device are in a fixed position at this time.
The direction of action should pass through the axis of the rebound sensor.
- Each measuring range of the test piece normally requires 5 individual test procedures.
The result of the measurement data scatter should be the general value of
do not exceed ± 15HL.
-The distance between two rebound points and the distance from the centre of any one
rebound point to the corner of the test piece should be as prescribed in Table 6.
- A comparative test must be carried out for each specific material to obtain the
corresponding conversion ratio if this Leeb hardness value is to be converted into the
other hardness values.
The procedure is as follows:
Tests are performed using the Leeb hardness tester (or other equivalent hardness
tester), which has been correctly recalibrated, on the same test piece.
For each hardness value 5 points should be selected for tests, which are uniformly
distributed and at least 3 indentation tests should be made for each of them; this
requires the conversion of the hardness value. The arithmetic mean value of the Leeb
hardness and the mean value of the corresponding hardness serve as relevant values
to create an individual hardness comparison curve. This curve should contain at least
three groups of correlating data in the comparison curve.