This standard applies to linear or logarithmic analogue ratemeters used in nuclear instrumentation to measure random pulse counting rates in a range from about 0.1 to about 10<(hoch)6> sec<(hoch)-1>, as produced by detectors such as counter tubes or fiss
IEC 60650:1979 history
1979IEC 60650:1979 Analogue counting ratemeters. Characteristics and test methods