Universal flow meter and method for controlling a universal flow meter

摘要

The invention, which relates to a universal flow meter and a method for controlling a universal flow meter, is based on the object of specifying a solution which enables continuous measurement of fluorescence and absorption signals of a sample and automated dilution of the sample on the basis of a measured concentration value, here as an optical one Density (OD value) measured, enables. This object is achieved in terms of the arrangement in that a measuring cell (18) and a photoelectron multiplier (29) are arranged as a means for analyzing the sample, a means for generating light of a specified wavelength is arranged for irradiating the measuring cell (18) and that for A fluorescence signal transmission means is arranged to transmit a fluorescence signal arising in the measuring cell (18) to the photoelectron multiplier (29). In terms of the method, this object is achieved in that a sample is taken and its optical density is measured by means of a photodiode detector (33), that the sample is diluted until a measured optical density with a predetermined value is reached, that a fluorescent dye is then added and the Analysis of the sample is carried out by means of a photoelectron multiplier (29) and that after the analysis the universal flow meter (1) is cleaned by rinsing before the next sample is taken and analyzed.