An auxiliary quantity, homogeneous with the measured one, was proposed to use in testing of the object throw the measurement channel. The result of processing this quantity in the measurement channel was used for the additive and multiplicative adjustments of settings limits of the positive decision range to reduce the impact of imperfect processing characteristics on the measurement control. The valuable effectiveness of the correction for various relations of the processing error components and the effect of relations of the auxiliary quantity components were shown. The effect of errors of forming auxiliary quantity was also estd.