What are the performance indicators of electronic belt scales?

The accuracy and ability to maintain accuracy of electronic belt scales during the measurement process are closely related to their technical performance. Guonuo Technology will briefly share the technical performance indicators of belt scales.

1. Accuracy

Measurement accuracy represents the accuracy level that can be achieved during the normal measurement process of a belt scale. It is one of the important indicators for accurately measuring the dynamic measurement performance of electronic belt scales. It reflects the measurement error level of the belt scale within the normal working flow range and is an important basis for online measurement assessment of belt scales.

2. Stability

Measurement stability is one of the important parameters characterizing the nonlinear error of electronic belt scales and is a comprehensive indicator reflecting the quality of the belt scale's instrumentation measurement performance.

3. Reliability

Reliability reflects the hard indicators of the performance and quality of a belt scale's circuit structure and even the entire weighing system.

4. On-site environment and operating conditions

The normal operating conditions of electronic belt scales include:

①Accessibility for all devices (hardware) of the instrument circuit;

②Normal operation of the instrument's working control program (software);

③A good operating environment (including temperature, humidity, power supply voltage, electromagnetic interference, vibration, feeding conditions, and the operating status of the measuring belt, etc.).

5. Temperature and humidity in the instrument room

For the normal operation of electronic belt scales, there are requirements for temperature and humidity. Practice has shown that excessively high ambient temperatures are detrimental to the normal operation of belt scales. In mild cases, it can increase the zero drift of the instrument, and in severe cases, it can cause the instrument's working control program to malfunction, resulting in abnormal display or damage to the instrument, causing measurement interruption.

6. Vibration

The stability of electronic belt scales largely depends on the working condition of the scale frame. When large mechanical equipment is started, it generates significant vibration, and the scale frame is subjected to this vibration, causing zero shift and directly affecting measurement stability. Therefore, the installation site of the belt scale should be far from vibration sources.

7. Electromagnetic Interference

The normal operation of the instrument's working program is one of the necessary conditions to ensure the normal operation of the electronic belt scale system. Strong electromagnetic interference can disrupt the instrument's working control program, causing the instrument to malfunction. Therefore, the instrument room and instrument cables should be laid as far away as possible from three-phase AC power sources and high-power electromagnetic equipment.

8. Power Supply and Voltage

Belt scales do not have excessive requirements for power supply voltage. They can operate normally as long as the provided AC voltage is within the range of 220V±10% and 50Hz±1Hz.

9. Process Feed

The process feed conditions must ensure that the given flow rate is between (25%~85%) F·S. Overload or underload will affect measurement accuracy.

10. Belt Bouncing and Running Off-Center

Currently, belt conveyor systems commonly experience issues such as belt running off-center, bouncing, and increased belt tension, which affect the normal measurement of electronic belt scales to varying degrees.

①Bouncing: The bouncing and jumping of the measuring belt mainly have a significant impact on the instrument's sampling signal. In severe cases, it can trigger step alarms or even cause the instrument to stop measuring.

②Running off-center: Belt running off-center mainly affects the stability of the instrument's zero point. Severe running off-center can change the force situation of the load cell, causing the instrument's set tare value to deviate and resulting in zero point deviation.

In summary, the on-site environment is closely related to the measurement error of electronic belt scales, and the situation is complex; many unfavorable on-site factors can change the operation of the belt scales, leading to poor measurement stability and production impacts.