This article describes the characteristics of the load cell sensor.
The load cell is an important part of the electronic scale. The quality of the sensor largely determines the performance of the electronic scale. So how do we judge the quality of the load cell?
1. Electronic scale safety limit load and limit overload:
The maximum axial load that can be applied to the load cell, at this time, the load cell performance characteristics will not produce a sexual drift that exceeds the specified value. When the work exceeds this value, the sensor will be damaged.
2. Load cell measurement range:
The range of the measured mass, and the measurement result will not exceed the maximum allowable error within this range.
3. Electronic scale weighing sensor division value:
The size of one part of the measuring range i of the weighing sensor after being divided equally
4. Graduation value for weighing sensor verification:
In order to accurately classify, the weighing sensor’s indexing value expressed in mass units is used in the load cell test.
5. Load cell output:
The measured mass is measurable obtained by the conversion of the load cell.
6. The smallest verification division value of the weighing sensor of the electronic scale:
The smallest verification division value that the measuring range of the load cell can be indexed.
7. Non-linearity:
Characterizes the degree of the corresponding relationship between the output voltage signal of the sensor and the load, specifically the deviation of the process calibration curve of the load cell from the theoretical straight line.
8. Excitation voltage:
The normal voltage required by the sensor to work, generally 5~10v.
9. Insulation resistance:
The insulation resistance is equivalent to a resistance equivalent to that connected in series between the sensor bridge and the ground, specifically the resistance between the elastic beam of the load cell and the strain gauge
10. Sensitivity:
The ratio of the output increment to the applied load increment. When the sensors of different manufacturers are used together, the consistency of sensitivity must be paid attention to.
11. Creep:
Under constant conditions where the load remains unchanged and all environmental conditions and other variables remain unchanged, the full load output of the load cell changes with time. Correspondingly, there are creep recovery parameters.
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