What is the difference between the durability and stability of electronic belt scales?

Electronic belt scales are metrological instruments used in industry for continuous dynamic weighing of bulk materials. As metrological instruments, the primary factor for evaluating their quality is the weighing accuracy of electronic belt scales. However, the use of electronic belt scales is influenced by many factors, including internal factors and external environmental factors, which all affect the performance and usage of the belt scales. The durability and stability of belt scales during use are also important factors for evaluating their quality.

Many people do not understand the difference between the durability and stability of belt scales, and even think they refer to the service life of the belt scales. This is actually not the case. Today, Guonuo Technology will briefly analyze the durability and stability of belt scales to help you more comprehensively judge the quality of electronic belt scales.

1.Durability of Electronic Belt Scales

The durability of belt scales, as officially defined, refers to the ability of the scale to maintain its performance characteristics within its usage cycle, as stated in R76 "Non-automatic Weighing Instruments" and R50 "Continuous Totalizing Automatic Weighing Instruments (Belt Scales)". In simpler terms, the durability of a belt scale refers to its ability to maintain its performance characteristics, such as weighing accuracy, stable electronic components, and no mechanical wear, within the specified usage cycle. The durability of belt scales encompasses two aspects: one is the usage cycle of the scale, with a longer cycle indicating better performance; the other is the consistent performance of the scale within the cycle. Therefore, durability is not solely about the service life of the belt scale.

It should be noted that R76 points out that durability errors may be caused by mechanical wear, damage, or aging of electronic components. This also shows that the quality and performance of the mechanical parts of the belt scale determine its durability.

2.Stability of Belt Scales

The stability of belt scales includes measurement range stability and long-term stability.

·Measurement Range Stability: According to international recommendations such as R76, R51, and R61, measurement range stability refers to the ability of the scale to maintain the difference between the indication at maximum load and the zero indication within a specified range throughout its usage cycle. Simply put, it is the stability and accuracy of the belt scale's weighing.

·Long-term Stability: The long-term stability of a belt scale refers to the ability of the scale, after a specified verification period and without any adjustments, to still meet the performance indicators for in-service checks. In simpler terms, the electronic belt scale is tested on-site before being put into use. After a cycle of use, it is tested again without any adjustments, and its metrological performance indicators still meet the requirements for in-service checks.

After the above analysis and comparison, it is clear that the durability and stability of belt scales have both differences and connections. They are similar in that they both relate to the scale's ability to maintain consistent performance, including weighing accuracy and partial load performance. The difference lies in the evaluation conditions they involve: durability relates to the entire service life of the belt scale, while stability reflects the performance within a certain usage cycle under specified conditions.

The assessment timing for durability and stability also differs: durability is mainly considered during the design and finalization process of the belt scale, while stability is primarily evaluated during actual use.

Finally, the scopes of durability and stability are also different. Stability is more focused on the scale's weighing capabilities, i.e., measurement stability, while durability covers a broader range, including not only metrological performance but also anti-interference performance.

The durability and stability of electronic belt scales are both criteria for judging their quality. Only by comprehensively considering both can one fully understand the quality of the belt scale itself and its performance after being put into use.