Worst Case Error Budget and Analysis in the Design of a Novel Signal Conditioning Circuit for Eddy Current Flow Meter in Sodium Cooled Fast Breeder Reactor

This paper attempts to describe the worst case error budget and analysis of a novel signal conditioning circuit which is an integral part a measuring electronics developed for the measurement of sodium flow from eddy current flow meter. The flow sensor is fitted in the sodium cooled fast breeder reactor for measuring sodium flow in the outlet of the primary sodium pump and fuel subassemblies at Indira Gandhi Centre for Atomic Research, Kalpakkam, India. It is essential to calculate the error budget and perform the error analysis to evaluate the reliability of the signal conditioning circuit. The work focuses on calculating the error in the circuit, which will affect the absolute accuracy, resolution and drift in the measurement. Based on the specification of each component in the circuit, the worst case error budget and analysis is done. This enables to design a circuit that produce less error even when operated in the worst possible conditions by making comparison of all possible component errors.