FLUID ANALYZER BY MULTI-FLUID MODULATION SYSTEM

摘要

PURPOSE:To lower measuring errors due to a noise component accurately and easily, by setting a ratio between modulation frequencies of two fluid modulation means so as to be an even number or one-eventh. CONSTITUTION:Sample fluids S1 and S2 are modulated with frequencies F1 and F2 different from each other by comparison fluids R1 and R2 using fluid modulation means V1 and V2. The sample fluids S1 and S2 (R1 and R2) modulated are supplied to an analyzer section A having a detector D simultaneously and continuously. The modulation means V1 and V2 are so set that a ratio of the modulation frequencies F1 and F2 is an even number or one-eventh. An output signal O from the detector D is separated into signal components O1 and O2 with the modulation frequencies F1 and F2 with respect to the sample fluids S1 and S2 using a signal processing means B comprising a frequency separation circuit and a signal rectifying circuit and undergoes a rectification processing thereby obtaining an analysis value pertaining to the sample fluids S1 and S2.