METHOD FOR CALIBRATION/GRADUATION AND DETERMINATION OF METROLOGICAL CHARACTERISTICS OF LEVEL MEASURING CHANNEL IN POLYMETRIC SYSTEM

摘要

A method for calibration of level measuring channel in polymetric system includes measurement of the level with refractometric method through sending high-frequency pulse probing signal to sensitive element, reception of signal reflected by wave impedance irregularities on sensitive element, measurement of delay time of reflected signal with respect to probing one, processing in calculator and displaying. By the whole length of the sensitive element of the measuring channel with alternation wave impedance irregularities are generated due to temporary shorting of conductors between each other through known sections of its length with use of electromechanical means. Temperature of electronic block is changed, and the value of delay time of signals reflected by generated irregularities on the sensitive element and the value of temperature of electronic block at that very time are stored with software of measuring channel together with respective characteristics of length measure, after that correspondence of readings from measuring channel of polymetric system to readings of the length measure is determined.