IEC 60151-13:1966 Measurements of the electrical properties of electronic tubes. Part 13 : Methods of measurement of emission current from hot cathodes for high-vacuum electronic tubes and valves
Does not apply as a recommendation in the sense of a standard because of the absence of detailed description of measuring methods. The definitions are given and the theory is detailed. D.c. and a.c. voltage methods and pulse voltage methods of measuremen
IEC 60151-13:1966 history
1966IEC 60151-13:1966 Measurements of the electrical properties of electronic tubes. Part 13 : Methods of measurement of emission current from hot cathodes for high-vacuum electronic tubes and valves