The Class H tester uses a fully enclosed impact chamber to keep operators protected during every strike. The enclosure surrounds the pendulum, supports and specimen so no debris or fractured pieces can leave the test zone. This is important when testing high-hardness materials, where broken fragments can fly at high speed.

The doors are equipped with interlocks that prevent the pendulum from moving unless the enclosure is closed and secured. If the door is opened at any point, the machine will not allow a test cycle to start. This removes the possibility of accidental release while loading a specimen.

The electromagnetic lock adds another safety layer by holding the pendulum firmly at the top position until the system confirms all conditions are safe. Lights and on-screen notices guide the operator through each step so there is no confusion about machine status. Together, these features create a controlled environment that protects the operator even during high-energy tests.

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