This document specifies frequency and methods for the verification of pendulum impact-testing machines used for the Charpy impact test, Izod impact test, and tensile impact test described in ISO 179-1, ISO 180 and ISO 8256, respectively. Verification of instrumented impact machines is covered insofar as the geometrical and physical properties of instrumented machines are identical to non-instrumented machines. The force/work verification of instrumented machines is not covered in this document.

This document is applicable to pendulum-type impact-testing machines, of different capacities and/or designs, with the geometrical and physical properties specified in Clause 5.

Methods are specified for verification of the geometrical and physical properties of the different parts of the test machine.

These methods are for use when the machine is being installed, has been repaired, has been moved, or is undergoing periodic checking.