Adjust the impact severity by rotating the knurled cap until the desired energy-value i s displayed. Pull the knob slowly out of the device until it locks in place. If moved too fast, the clamp may skip its arrester and will lock at its way back when the pulling-for ce declines. Hold the device horizontally at it’s housing tube and press the (black) rele ase cone to the specimens plane of impact. The strike is automatically released when the release force threshold is reached.
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