Scaling and linearization in radioisotope digital instruments

Scaling and linearization methods used in processing a signal from initial measuring converters (IMC) are described. Flowsheets for some variants of realization of linearization methods are shown. Conclusions have been drawn that the problem of data processing for presentation of measurement results in a digital form in units of a controlled parameter at IMC linearly increasing or decreasing calibration characteristics is reduced to performing elementary mathematical operations, and in the case of IMC nonlinearly-increasing or decreasing characteristics, to a complex mathematical processing. Hardware of scaling converters providing linear converters is rather simple and can be realized with the help of simple electronic devices, such as pulse generators, subtracters and others. Hardware of linearizing converters providing nonlinear conversion is much more complicated. Converters of this type require complex computer equipment (memories, registers, microprocessors, etc). In designing radioisotope instruments it is advisable in most cases to reduce the measurement range width to values at which the IMC calibration characteristics can be assumed as linear one, with an error not exceeding permissible limits