DIN ISO 669:2001-06

The document defines terms and symbols of resistance welding equipment; the manufacturing rules that are to be applied to the resistance welding equipment; the measuring units, necessary to their designation and specification, which shall be mentioned on the rating plate; the tests that are necessary to verify the compliance of a given equipment with the requirements of this standard and that it is suitably designated. Furthermore, the evaluation criteria and dynamic machine functioning during the welding process are illustrated and corresponding measuring techniques are described.