Span adjusting system of electronic weighing apparatus

Details Span adjusting system of electronic weighing apparatus Span adjusting system of electronic weighing apparatus

1984-07-06

1985-10-08

Miller, Jr., George H.

Weighing scales

Computer

Electrical

177 50, 177164, 364567, 364571, G01G 2322, G01G 1952, G01G 2314, G01L 2500

Patent

active

045454450

ABSTRACT:
There is provided a system for adjusting the span of an electronic scale having a double-integrating A/D converter for converting a weight signal into a digital signal. The double-integrating A/D converter has a software-implemented timer for controlling a primary integrating time. The operation time of the software-implemented timer is adjusted linearly or in steps so that a digital value at the time a weight is placed on the scalepan of the scale will correspond to the weight. The adjustment of the operation time of the software-implemented timer is utilized to adjust the differences between gravitational accelerations corresponding to different weights in geographical areas on the earth.

REFERENCES:
patent: 4080657 (1978-03-01), Caldicott et al.
patent: 4310893 (1982-01-01), Loshbough
patent: 4316518 (1982-02-01), Jonath
patent: 4417631 (1983-11-01), Johnson

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