IEC 60050-301:1983 International Electrotechnical Vocabulary (IEV) - Part 301: General terms on measurements in electricity - Part 302: Electrical measuring instruments - Part 303: Electronic measuring instruments
1970IEC 60050-301:1983 International Electrotechnical Vocabulary (IEV) - Part 301: General terms on measurements in electricity - Part 302: Electrical measuring instruments - Part 303: Electronic measuring instruments