Method for calibrating a particle counting machine and a calibra

Details Method for calibrating a particle counting machine and a calibra Method for calibrating a particle counting machine and a calibra

1979-02-23

1982-05-25

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

73 1R, G06M 1100

Patent

active

043318622

ABSTRACT:
A calibration method and standard for calibrating particle counting instruments such as blood platelet counting instruments in which the particles have a distribution of sizes, wherein the method includes the following steps performable in any order. A first known concentration of particles having a mean size which is substantially near the lower extreme size distribution of particles normally counted by the instrument being calibrated are counted and the counts thus obtained are compared with the known count of the concentration. A second known concentration of particles are then counted with the instrument to be calibrated in which the mean size of the second particles is substantially near the upper extreme size distribution of the particles normally counted by the instrument. The count thus obtained is then compared to the known count of the concentration.

REFERENCES:
patent: 1118981 (1914-12-01), Wenzelmann
patent: 3412037 (1968-11-01), Gochman et al.
patent: 3634868 (1972-01-01), Pelavin
patent: 3791192 (1974-02-01), Butler
patent: 3874850 (1975-04-01), Sorensen et al.
patent: 3975727 (1976-08-01), Mader et al.
patent: 4160644 (1979-07-01), Ryan
patent: 4193288 (1980-03-01), Berber et al.
"Lyman Shotshell Handbook", First Complete Edition, 1969, pp. 26-27 "Powder and Shot Bushings".

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