What information should be clarified before selecting an electronic belt scale?

An electronic belt scale is a dynamically continuous weighing instrument, primarily composed of a weighing bridge, load cells, speed sensors, and instrumentation components. The belt scale's weighing bridge is installed on the conveyor frame. When material passes through, the weighing rollers detect the weight of the material on the conveyor belt and, through levers, act on the load cells to produce a voltage signal proportional to the belt load. The speed sensor is directly connected to a large-diameter speed-measuring roller, providing a series of pulses, with each pulse representing a unit of belt movement; the pulse frequency is proportional to the belt speed. The weighing instrument receives signals from the load cells and speed sensors, calculates the instantaneous flow rate and accumulated weight through integration, and displays these values separately.

Due to the high efficiency of electronic belt scales, they can be used for weighing in almost any setting with a conveyor belt, without the need to stop the belt. Applications include mining, electricity, metallurgy, chemicals, building materials, environmental protection, grain, and other industries that handle bulk materials.

The performance and accuracy of a belt scale during operation are influenced by its components, inherent quality, performance, as well as environmental and operational factors. Therefore, users should select an electronic belt scale based on their specific needs and after clarifying certain factors.

1. Clarify the Material: Belt scales are suitable for measuring bulk materials and do not have absolute restrictions on material density, granularity, or volume. However, they do have requirements for moisture content and viscosity; materials with high moisture or viscosity should be avoided as they can stick to the belt, leading to repeated weighing and inaccurate measurements.

2. Clarify the Belt Width: The width of the belt scale frame should match the width of the conveyor belt; otherwise, it cannot be installed and used.

3. Clarify the Accuracy: This includes both the required accuracy and the accuracy of the belt scale itself. The belt scale's accuracy should meet the user's needs, rather than blindly pursuing high accuracy or low prices. Different types of belt scales have different accuracies. They are categorized into trade settlement and non-trade settlement types, with trade settlement requiring high accuracy and non-trade settlement sufficient with standard accuracy. Typically, the accuracy should be stable within 0.5% to 3%.

4. Clarify the Belt Angle: The belt angle is related to measurement accuracy, and different belt scale structures can accommodate different conveyor angles.

5. Clarify the Material Flow Rate: The range of the belt scale's sensors is related to the material flow rate. If the flow rate during use significantly exceeds the sensor's range, it may cause overloading or sensor damage. Therefore, it is essential to determine the maximum and minimum flow rates for the belt scale under operating conditions.

6. Clarify if the Feed Rate is Constant: Some users not only require weighing but also need to control the feed rate. In such cases, a feeder or a belt scale with dosing capabilities should be selected.

7. Clarify the Conveyor Motor's Operating Status: Determine if the conveyor motor operates at a fixed frequency or a variable frequency, as this will help determine whether a speed sensor is needed.

8. Clarify Other Parameters: Before finalizing the belt scale selection, communicate detailed parameters with the end-user. Guonuo Xinke will thoroughly discuss these parameters with users. With extensive experience in electronic belt scale applications, Guonuo's pre-sales team can recommend and develop reasonable and suitable belt scale solutions for users.