Due to the effect of the use and the environment and device aging of belt weigher,the accuracy may change.According to state regulations require periodic testing measurement technology.Without verification or exceed the effective date of belt weigher can not be used.

Belt weigher is specifically designed for continuous measurement of bulk materials.It is based on the principle of leverage,mounted the lever device below the continuously running belt,the lever bearing surface is several roller device to meet the measurement error at the time of the belt through the belt and reduce the friction caused by the bearing surface.Meanwhile metering section also get rid of the traditional weights equipment , and use weighing sensor to measure which is made use of strain gauges.

When the materials on the belt go through the bearing surface of lever device,the bearing surface would produce a certain pressure,the pressure is transmitted through the lever device to the weighing sensor,and the control means sensing the weight of the load pressure sensor signal amplification processing,display with digital.And can be displayed on an external digital signal artificially controlled to measure the amount of people feed belt weigher by automatically changing the actual requirements of the speed of the belt,for a given amount of feed track so as to form a belt material for a long time,slower,faster feed rate is low,when there is no material fastest and slowest to stop even when the overload control characteristics.But when there is no material above the belt is not the fastest unlimited fast,belt motor drive belt can not be directly run.Therefore,a different volume of feed materials,will use a different mechanism to control the fastest deceleration belt,change gear ratio also changes the scope of a full-scale measurement of different materials.