Applicable to all types of resistive potentiometers, includinglead-screw actuated types, presets, multi-turn units, etc. to beused in electronic equipment. Establishes standard terms, inspectionprocedures and methods of test for use in sectional and detailspecifications for Qualification Approval and Quality AssessmentSystems for electronic components. Has been mainly written, and thetest methods described, to conform with the widely used single turnrotary potentiometer with a control spindle.Supersedes IEC 60393-1 (1973), 60393-1A (1977), 60393-1B (1978) and60393-1C (1979).