Performance indicators of weighing systems

Weighing performance

The performance of a weighing system can be measured by the following indicators:

linear

lagging

Repeatability

creep

Linearity: Indicates the degree of consistency between the actual output of the system and the theoretical straight line. As shown in the figure, when linear errors occur, the output of the system is correct at no load and full load, but the input-output points between these two points are inconsistent with the ideal state. Linear error is the maximum difference between the theoretical straight line and the actual output curve.

Lag: Refers to the degree to which the input-output curve of the system does not coincide during loading and unloading processes.

Repeatability: Refers to the degree of inconsistency in the system's output for several consecutive weighing of the same weight during the loading or unloading process. Usually expressed as the percentage of the total output that is the difference between the minimum output and the maximum output of the system under the same loading condition.

Creep: Refers to the characteristic of a system bearing a constant weight at a certain temperature, and the output changes over time due to mechanical deformation of the elastic material of the sensor.