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A weigh system design in engineering refers to a mechanism or setup that accurately measures and manages the weight or mass of objects in various applications. The design can vary significantly depending on the specific requirements and industry, but here is a short description of the key components and considerations typically involved.

The trend in weigh scales towards higher accuracy and lower cost has produced an increased demand for high-performance analog signal processing at low cost. The scope of this requirement is not obvious; most weigh scales output the final weight value at a resolution of 1:3,000 or 1:10,000, which is easily met (apparently) by a 12-bit to 14-bit ADC (analog-to-digital converter). However, a closer examination of weigh scales shows that meeting the resolution requirement is not that easily accomplished; in fact, the ADC accuracy needs to be much higher. In this article, we discuss some of the system specifications of weigh scales and deal with considerations for designing and building a weigh-scale system. The main areas considered are peak-to-peak-noise resolution, A/D-converter dynamic range, gain drift, and filtering. We compare measured data from a real load cell to inputs from astable voltage reference, using a weigh-scale reference design as an evaluation board.

The most important parameters to consider when designing a weigh-scale system are internal count, ADC dynamic range, noise-free resolution, update rate, system gain, and gain-error drift. The system must be designed to be ratio metric, hence independent of supply voltage—We thoroughly take care of all these parameters while designing our systems.