How does a belt scale work?

Conveyor belt scales weigh the material and determine the rate at which material travels on a conveyor belt over a specific period of time. Once the static weight is measured, the integrator incorporates the weight with the speed at which the belt is rotating to calculate the rate of mass per time.

What is belt scale?

A belt scale is used to continuously measure and report flow rates and totalized amounts of materials being transported on a conveyor belt. The weight of the material transported is determined by weighing the belt load and measuring the belt speed.

What is a conveyor scale?

Description. A conveyor scale allows products to be weighed in-motion, without having to be pulled off and weighed on a bench scale. This greatly reduces processing time for sorting, labeling, checkweighing, and more.

How do you calculate the TPH of a belt conveyor?

CAPACITY (TPH) = . 03 x Belt Speed (FPM) x material weight (lb. per cu. ft.)

What is a weigh feeder?

Weigh feeder is a closed-loop control system, which controls the flow of material very accurately using controller and different instruments. This system accepts an external command from process computers like SCADA, HMI, DCS etc.

What is Tare calibration?

Taring a scale is telling the scale to start a new measurement from whatever the current weigh point is. Zeroing a scale tells the scale that nothing is on it and to reset to zero. Calibrating a scale refreshes the scale’s accuracy by measuring against a known weight.

What is a Weightometer?

An appliance for the continuous weighing of coal or other material in transit on a belt conveyor. See Also: weighing-in-motion system. Ref: Nelson.

What is belt capacity?

The load that a belt conveyor is able to carry, depending upon the area of cross section of load on belt and the speed of the belt.

What is angle of surcharge?

The Angle of Surcharge (As) is the angle the material makes with the horizontal when the material is bumped or moving, such as on a moving conveyor belt . It is often the maximum incline of the conveyor . The Angle of Surcharge is normally 5° to 15° less than the Angle of Repose .

How does a weigh belt feeder work?

Weigh belt feeders operate by continuously weighing a moving bed of material on its short conveyor, and controlling belt speed to result in the desired flow rate at discharge. Therefore, weigh belt feeders can achieve high rates while remaining compact. Open frame models are typically used in food applications.

belt scale installation The principle of operation of an electromechanical belt scale is to measure the belt loading and belt speed and then compute the throughput rate, normally in tons/hour. This information is then used to control the feed rate of a process and/or reflect the throughput rate of a particular section of the plant.

How do you calibrate a conveyor belt scale?

Conveyor belt scales are normally calibrated in three steps: 1. Determine the speed pulse count over a multiple number of belt revolutions. 2. Establish the average belt zero over the same number of completed belt revolutions.

What is the accuracy of Schenck Process belt scales?

Schenck Process belt scales have accuracies as precise as +/- 0.25 percent. processes work.

How is the belt scale interfaced with the plant monitoring system?

Interfacing the belt scale to the plant monitoring and control system is available through standard 24 V d.c. pulse and 4 – 20 mA current outputs. Various serial communications options are also available.