REDUCING ERRORS IN MEASUREMENT OF COMPOSITION AND PROPERTIES OF MATERIALS

We describe algorithms for determining the values of the monitored par ameter from a pair of measured signals for cases when the ellipses of equal probability density for the dispersion of the signals for consta nt value of the parameter are tilted by different angles toward the ca libration characteristic. Diagnostics of the instrument operation are performed by indicating the sign of the next result and the magnitude of its deviation from the calibration line. Automatic calibration of t he instrument is done directly during operation.