are used for the continuous registration of the overall weight of a furnace. By means of tareing of the empty furnace, the exact filling quantity, or after tapping the quantity removed and the remaining contents, can be accurately determined and recorded. As a rule, this is carried out with the aid of pressure measuring units with wire strain gauges. There are both round measuring cells, and for heavy loads measuring beams, which offer the advantage of 100% fixing of the furnace. In the case of round measuring cells, the furnace has a mobile mount- ing, and is only secured against tipping by means of a lifting lock. The scale graduations are 2 kg for small furnaces, and 5 or 10 kg for larger furnaces. The use of furnace scales is essential for processor-controlled systems.
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