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| News |
15.04.2013
Accurate weighing of products within screw conveyors
Hense Wägetechnik GmbH, Brilon, Germany, points out that flow meter systems like weigh feeders, impact scales and others can be used to measure free flowing solids. However, very fine powders like white lime, lime hydrate and cement can cause problems with caking and dust emission. Fine powders are often conveyed via screw conveyor. If screw conveyors are wired with the correct weighing components, they can be used for material transport and mass flow measurement simultanously.
For precise weighing it is essential, that the inlet and the outlet of the screw conveyor are decoupled. The speed of the conveyor must be measure and controlled to achieve a nearly constant material level inside the screw. New evaluation electronics can detect the speed of the conveyor and multiplies this with the net material weight.
The display shows the actual flow rate, the total flow and a historical graph of the flow rate. The system is available with English, German, Russian and Turkish user language. Soft keys allow an easy and flexible operation - also with customised application software. Selectable in- and outputs for speed sensors, batching, counting and tare functions are available. At present the electronics can work with RS 232,RS 485, Modbus, Profibus and Ethernet.
www.hense-waegetechnik.de
Hense Wägetechnik has optimised screw conveyor weighing
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