Process and device for calibrating a sampling and metering pipet

Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...

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Details

7386418, G01F 2500, B01L 300, G01N 114

Patent

active

047901764

ABSTRACT:
The invention relates to a process and a device for calibrating a sampling and metering pipette and a pipette adapted to be used in the process with the device. The volume of the sampling chamber of the pipette is adjusted to zero by means of a knurled button (3) and an adjusting screw (7) is actuated to set the stroke of a plunger for taking a sample at a zero value. The volume of the sample chamber is adjusted by means of the knurled button (3) to determine a mean value of the sample volume, and a new adjustment of the brake screw (7) is made to a value corresponding to the difference between a displayed volume value and the mean value of the sample volume.

REFERENCES:
patent: 3343539 (1967-09-01), Moorhouse
patent: 3613952 (1971-10-01), Gilmont et al.
patent: 3882729 (1975-05-01), Roach
patent: 4096750 (1978-06-01), Sturm
patent: 4098125 (1978-07-01), Lee
patent: 4165646 (1979-08-01), Shopiro
patent: 4250755 (1981-02-01), Kenney
patent: 4362063 (1982-12-01), d'Autry
patent: 4501163 (1985-02-01), MacDermott et al.
patent: 4671123 (1987-06-01), Magnussen, Jr. et al.
patent: 4672857 (1987-06-01), MacDermott

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