Applies to accelerators which deliver either a X or electron radiation beam with nominal energies in the range of 1 MeV to 50 MeV at maximum absorbed dose rates between 0.001 Gys-1 and 1 Gys-1 at 1 m from the radiation source and normal treatment distances. This standard specifies test procedures of the type test to be performed by the manufacturer at the design and construction stage but does not specify any safety requirements or acceptance tests to be performed after installation at the purchaser's site. The measurement conditions described differ from those currently in use and should be substituted for and not added to present methods. Appendix A contains terminology and appendix B the format for presentation of functional performance values.