Calibratable electromagnetically compensating balance

Details Calibratable electromagnetically compensating balance Calibratable electromagnetically compensating balance

1977-01-12

1979-05-29

Swisher, S. Clement

Measuring and testing

Instrument proving or calibrating

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

177210EM, G01G 2300

Patent

active

041563611

ABSTRACT:
A calibratable electromagnetically compensating precision balance having a weighing and taring device, in the form of a pan support, is provided with a parallel guide. The output from the balance is fed to an analog-digital converter which has its output coupled, via a minicomputer (calculator), to a display. A reference weight is provided for the balance. The reference weight is externally switchable for its weight determination, i.e., from outside the housing of the balance. A lifting mechanism is provided to lift the pan from the support. A method for compensating the parameters of the above-described calibratable electromechanical balance which can influence sensitivity and accuracy, involves determining and recording the actual value (M) of reference weight, under the prevailing operating conditions using the balance. Forming a quotient from the actual measured value (M) and the set (given) value (m) of the reference weight, the quotient being expressed in the form of a factor (F). Thereafter, multiplying the corresponding measured value of material to be weighed by the correction factor (F) before displaying the value. The correction factor is stored in a memory operatively associated with the minicomputer.

REFERENCES:
patent: 2832535 (1958-04-01), Sherman
patent: 2974518 (1961-03-01), Jones
patent: 3738439 (1973-06-01), Herbert
patent: 3786883 (1974-01-01), Kunz
patent: 3889540 (1975-06-01), Widmer
patent: 3976150 (1976-08-01), Wilson et al.

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