Weighing, as the name suggests, is used to control the air handling and weighing weighing equipment. The crane is lifting and driving the common name. An electronic balance weighing is installed on the crane, is a kind of non-standard scales, usually used in some iron and steel plant, metallurgical factory.
In some iron and steel metallurgy factory, because sometimes because the temperature is too high or the crane lifting height is not enough, the electronic balance can not be used, especially in the special occasions of large tonnage hoisting, large tonnage of electronic steelyard cost increases and more safety is also reduced, lifting height and high temperature limit, the use of hook scale is limited, but it must be measured on the weight lifting work, it is the case, the strength of the individual and the weighing apparatus factory crane factory jointly developed a scale crane (crane scale). But because of the impact process and sensor performance making, weighing (running scale) usually accuracy is not too high, probably at about 0.5%--1%. Therefore, in accordance with national standards, in accordance with the standard three level scale can be used for industrial and commercial use and scales, crane scales (crane scale) can only be classified as grade four scales, so under normal circumstances, weighing (Driving Scale) just for internal settlement or process control. The crane (driving) due to many restrictions, such as space, installation difficulty, safety and other factors, weighing (running scale) installation of a variety of methods, such as fixed pulley type, small car, rail, which according to the needs of the circumstances.