Abstract: A maximum number of charges on aerosol particles which are measurement targets is decided as a natural number x equal to or larger than 2. First and second electrical mobility groups are derived based on x. The first group includes electrical mobility Zc(U) and electrical mobilities having voltage values equal to a voltage U multiplied by values from 2 to x respectively, and the second group includes electrical mobilities having respective voltage values equal to voltage U multiplied by irreducible fractions which are coprime to each other among values with regularity. A ratio of flow rate with which range corresponding to the electrical mobilities included in the first group do not interfere with one another and the range corresponding to the electrical mobilities included in the first group and range corresponding to the electrical mobilities included in the mobility group do not interfere with one another is calculated.

Abstract: A particle size distribution measuring system 1 sets a reference voltage in a DMA 300 to a voltage value U, and executes the classifying of aerosol particles based on electrical mobility, in an electric field to which the voltage value U is supplied. When a predetermined condition is not satisfied, an analyzing device 600 causes a sum of the voltage value for the previous classifying (previous value) and the voltage value U to be re-set in the DMA 300 and causes the classifying of the aerosol particles to be executed again. A particle measuring device 400 defines a first measurement result as a measurement result M1, and defines a result of the re-measurement as a new measurement result Mx every time the measurement is thereafter repeated.

Abstract: A maximum number of charges on aerosol particles which are measurement targets is decided as a natural number x equal to or larger than 2. First and second electrical mobility groups are derived based on x. The first group includes electrical mobility Zc(U) and electrical mobilities having voltage values equal to a voltage U multiplied by values from 2 to x respectively, and the second group includes electrical mobilities having respective voltage values equal to voltage U multiplied by irreducible fractions which are coprime to each other among values with regularity. A ratio of flow rate with which range corresponding to the electrical mobilities included in the first group do not interfere with one another and the range corresponding to the electrical mobilities included in the first group and range corresponding to the electrical mobilities included in the mobility group do not interfere with one another is calculated.

Abstract: A particle size distribution measuring system 1 sets a reference voltage in a DMA 300 to a voltage value U, and executes the classifying of aerosol particles based on electrical mobility, in an electric field to which the voltage value U is supplied. When a predetermined condition is not satisfied, an analyzing device 600 causes a sum of the voltage value for the previous classifying (previous value) and the voltage value U to be re-set in the DMA 300 and causes the classifying of the aerosol particles to be executed again. A particle measuring device 400 defines a first measurement result as a measurement result M1, and defines a result of the re-measurement as a new measurement result Mx every time the measurement is thereafter repeated.