Control circuit for liquid chromatograph

Details Control circuit for liquid chromatograph Control circuit for liquid chromatograph

1982-01-29

1984-05-22

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Control

377 27, 364502, G06F 1546

Patent

active

044505744

ABSTRACT:
A circuit for controlling the proportions of a plurality of solvents being introduced into a column of a liquid chromatograph. The circuit compensates for the compressibility of liquids by dividing the time during each pumping cycle during which the pump is delivering liquid to the column into a known number of intervals. A circuit responsive to the interval signals opens and closes solvent valves thereby allowing the solvents to be introduced into the pump in the desired proportions.

REFERENCES:
patent: 3154670 (1964-10-01), Gossel
patent: 3604903 (1971-09-01), Hill et al.
patent: 4063077 (1977-12-01), Wright

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