Minimization of summary error of radiometric instrument

Process of summary error minimization of radiometric gage by determining optimum relations between the radiation source activity, detector load and parameters of object under test is described. Deformation error due to calibration characteristic change of radiometric gage in case of detector load magnification and alteration of the parameter under test is introduced into calibration practice for the first time. It is shown that this errors is systematic and its minimum takes place in case of optimum detector load and depends on the type of calibration characteristic. Optimization of the gage by summary error minimum (deformation error + statistical error + conversation error) is performed