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4.2 Testing
A standard hardness block should be used to check the the tester prior
to the testing; and the reading value error and repeatability should not
be more than the specification in table 5.
Note: the hardness value of standard hardness test block can be measured
via a Leeb hardness tester which had been calibrated; five times of
measuring should be carried out in direction of vertical down and the
arithmetic mean of five values should be used as the hardness value of
standard hardness test block. If the value exceeds the standard range, it
can be calibrated via user calibration function.
4.2.1 Start-up
Insert the impact device plug into the socket of impact device located on
the right of the tester.
Press
【
】
key to turn on the power, then the tester enters into the
measuring status.
4.2.2 Loading
Push down the loading sheath to lock the impact body; for DC type
impact device, the loading bar can be attracted on testing surface and
insert DC type impact device into loading bar until the stop position,
then loading has been finished.
Press tightly the support ring of impact device on the surface of test
sample, the direction of impact should be vertical with testing surface.
