Electronic balance with calibrating device

Details Electronic balance with calibrating device Electronic balance with calibrating device

1990-10-19

1993-03-02

Lall, Parshotam S.

Boots, shoes, and leggings

177 50, 364556, 36457101, G01G 1952

Patent

active

051915430

ABSTRACT:
An electronic balance with a measured value receiver, a digital signal processing unit, a display unit and a calibrating device controlled by the digital signal processing unit (18) for placing on and lifting off a calibrating weight by use of a motor that the digital signal processing unit allows the calibrating weight to be continuously placed on and lifted off again and calculates the average value and the standard deviation from the individual measured values. Then compares the calculated standard deviation continuously with a set value stored in the digital signal processing unit and stops the placing on and the lifting off of the calibrating weight and calculates the calibrating factor from the calculated average value and stores the factor as soon as the calculated standard deviation is smaller than the set value and that the digital signal processing unit also stops the placing on the lifting off of the calibrating weight after a set maximum time if the calculated standard deviation is not smaller than the set value and does not store a new calibrating factor in this instance.

REFERENCES:
patent: 4660663 (1987-04-01), Amacher et al.
patent: 4723613 (1988-02-01), Garlen et al.

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