Method and apparatus for calibration of instruments serving to c

Details Method and apparatus for calibration of instruments serving to c Method and apparatus for calibration of instruments serving to c

1981-03-18

1983-04-19

Corbin, John K.

Optics: measuring and testing

Standard

356336, G01B 1110

Patent

active

043803920

ABSTRACT:
An instrument for counting and determining the size of particles suspended in a dispersion medium is calibrated by setting a certified particle contained in the dispersion medium in motion so that the particle repeatedly crosses the sensing zone of the instrument under calibration. An apparatus for accomplishing the calibration method comprises a vessel wherein a dispersion medium and a certified particle are placed and an actuator to set the certified particle in motion whereby a disperse system flow is simulated. Passing a flux of a radiant energy, such as light, through the dispersion medium gives rise to radiation pulses which are used as a basis to set the threshold of sensitivity of the instrument under calibration.

REFERENCES:
patent: 3127464 (1964-03-01), Gustavson
patent: 4135821 (1979-01-01), Pechin et al.

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