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4 Testing Program
4.1 Start-Up
Insert the plug of the impact device into the socket of impact device on the
instrument.
Press
the key
，
now power is on. The instrument is in working mode.
4.2 Loading
Pushing the loading-tube downwards until contact is felt. Then allow it to
slowly return to the starting position or using other method locking the impact
body.
4.3 Placement
Press the impact device supporting ring firmly on the surface of the sample,
the impact direction should be vertical to the testing surface.
4.4 Testing
Press the release button on the upside of the impact device to test. The
sample, the impact device as well as the operator are all required to be
stable. The action direction should pass the axis of the impact device.
Each measured area of the sample usually need 3 to 5 times of testing
operation to obtain an average. The result data dispersion should not
more than mean value
±
15HL
。
The distance between any two impact points or from the center of any
impact point to the edge of testing sample should conform to the
regulation of Table 4-1.