[Analysis of errors in radiation relay. (I) Optimum setting of time constant]

The statistical error of liquid level controlled by radiaiton relay is analysed and a method of minimizing the error is proposed in this paper. This method comes to the problem of optimum setting of the time constant of radiation relay. The equations for obtaining the value of time constant are presented and the numerical results are shown in a table and plotted in a figure. The optimum time constant of the upper level control relay differs entirely from that of lower level control relay.