Electronic balance

Details Electronic balance Electronic balance

1990-07-12

1991-10-22

Raevis, Robert

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01G 700

Patent

active

050584227

ABSTRACT:
Method and apparatus for calibrating the sensitivity and linearity of the weighing means of an electronic balance, wherein a sensitivity calibration is automatically conducted when the ambient temperature has changed a first predetermined amount or a predetermined period of time has passed since the previous calibration was conducted, and when a sensitivity calibration is conducted, it is checked whether or not the temperature change has exceeded a second predetermined amount greater than the first predetermined amount, and only when the temperature change has exceeded the second predetermined amount since the previous linearity calibration was conducted, a linearity calibration is conducted along with the sensitivity calibration.

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patent: 3976150 (1976-08-01), Wilson et al.
patent: 4457386 (1984-07-01), Schett et al.
patent: 4535854 (1985-08-01), Gard et al.
patent: 4535857 (1985-08-01), Haze
patent: 4660662 (1987-04-01), Katz
patent: 4703815 (1987-11-01), Hirano et al.
patent: 4909338 (1990-03-01), Vitunic et al.
patent: 4932486 (1990-06-01), Komoto et al.
patent: 4932487 (1990-06-01), Melcher et al.

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