The Charpy Impact Tester has inserted the function of machine energy loss calculation, energy formula and unit exchange. It will be easy to read the impact energy of specimen.

To impact the specimen by the force of pendulum of potential energy change to kinetic energy.

When the impacting head impact broke the specimen, the pulling angle of pendulum by residual energy would be the spare potential energy.

From the diversity of two energies, to determine the loss of energy value when impact.