Data processing: measuring – calibrating – or testing – Calibration or correction system – Weight
Patent
1996-11-27
1998-11-03
Trammell, James P.
Data processing: measuring, calibrating, or testing
Calibration or correction system
Weight
364567, 36457101, 364557, 36457105, 177 2513, G01C 2500
Patent
active
058324178
ABSTRACT:
The present weight scale performs automated self calibration by periodically initiating a measurement operation to determine the zero offset from a true weight reading due the weight scale's intrinsic weight. The weight scale's intrinsic weight will vary due to changes in environmental conditions such as temperature and humidity, which impact the behavior of the internal electronics that perform the weight measurement operations. The automated self calibration is provided by a counter circuit, clocked by a low power oscillator, that periodically initiates the weight scale's electronics to undertake a weight measurement of the tare weight value of the scale. The tare weight value is stored in memory until replaced by a subsequent tare weight value calculation. During a weight measurement operation the gross weight measurement is deducted by the tare weight value stored in memory to arrive at a net weight representing a user's true weight.
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Germanton Damon
Orbine Stephen A.
Petrucelli Steven P.
Measurement Specialties Inc.
Trammell James P.
Vo Hien
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