Siemens SITRANS WW300 Kullanım Talimatları Kılavuzu - Sayfa 10
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Operation
Weighfeeders
Weighfeeders weigh bulk material while it is conveyed. An accurate rate of flow and
totalized weight measurement is received without interrupting the flow of material in
process. A weighfeeder can also control the rate of flow of the conveyed product.
In-motion weighing requires accurate transmission of the product load to strain gauge
load cells. The resulting voltage signal corresponding to weight is transmitted to the
integrator and becomes one of the two inputs required for integration.
Unlike static weighing, in-motion weighing integration requires a second input: a pulse
signal proportional to the speed of the conveyor belt. Each belt speed sensor pulse
represents a fixed distance of travel.
Since the force measured by the load cell is represented as weight per unit length, it can
be multiplied by the distance of belt travel (one speed sensor pulse) to provide product
weight for that segment of the belt (lbs/ft x ft = lbs, or kg/m x m = kg).
Enclosed
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SITRANS WW300 - OPERATING INSTRUCTIONS
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