5.4.2 Hardness Scale
Press “HD” to choose the Hardness scale and strength:
5.4.3 Impact devices
Press “Probe” button to select probes.
5.4.4 Impact Direction
Press “DIR” button to select impact direction
5.4.5 Average times
It is very necessary to work out the average measuring values in hardness
testing. Different measuring times between 1-7 can be selected according to
user`s different requirements
Press “TIME” button to set the impact times from 1-7 which will calculate the
AVE value after the certain times.
5.5 Measuring
5.5.1 Operating
After finish the parameters setting, then start measuring:
Load the impact body: Pushing the loading-tube until contact is felt. Then
allow it to slowly return to the starting position locking the impact body.
Press the impact device support ring firmly on the surface of the sample,
the impact direction should be vertical to the testing surface.
Press the release button on the upside of the impact device to test. The
sample and the impact device as well as the operator are all required to be
stable now.
After testing, the tester will display as following:
5.5.2 Reject the Gross Error Value
During the measuring process, if the deviation between the measured value and
standard value is too big before the mean value displaying, the current
measured value can be deleted by press “DEL” button, and the current value
would be neither stored nor in averaging, the impact times minus one.
5.6 Average value
When the impact times reach the setting parameter “TIME”, then the tester will
display the following average value and will show the symbol “Ave”
3-5 times is usually used in normal measurement
5.7 Data saving and read settings
5.7.1 Storage testing result
Press “MEM” button to set the saving function, the “S” symbol will be showed
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