Are you ready for characteristics of the stress load cell


1. Linearity (Nonlinearity)

It is understood to be the ratio of the uppermost level of deviation value and expenditure value of full scale, between the actual characteristic curve and the best straight fitting brand.

2. Hysteresis

It is defined as a difference of input- expenditure between loading and unloading by simply every test cycle. In other words, loading from 0 to help 10kg and unloading from 20kg to 10 kg, the input could be the same, but there will always be a slight different output to create hysteresis.

3. Repeatability

It is synonymous with the degree of inconsistency of every measurement when the sensor detected because of the same physical condition, and that is also called stability. Normally, under same input issue, through multiple continuous sizes, then take the optimum random error as repeatability. The degree of repeatability is related to many random factors and is just like the cause of hysteresis. It is usually measured by experimental approach.


4. Creep

It is defined as the deformation degree increases into the future when the material is actually under full scale loading (external load remains unchanged). It can be shown in the sensor as the percentage change of it is output.


5. Sensitivity:

For a linear sensor, its empathy is its static feature, is the slope in the line.


6. Resolution

Resolution could be the ability of the sensor to perceive the smallest change to be assessed. It is the minimum measured value on the value to cause a change inside value indicated. It need to be separated from the understanding coefficient (sensitivity coefficient -- describes the ratio of productivity to input). In concept, the sensor's resolution is infinite, but there is often a limit to how many bits we can accurately see in the display instrument or acquire equipment

Such as:

Launching is from 0. 01233N in order to 0. 01235 N may be a small changes (or actually smaller), so we have output vary from sensor, but for display equipment i will only show to a number of digits, if it is the change of output voltage from 0. 0000x V for you to 0. 0000 y V (or perhaps smaller), the reading or showcase machine probably can’t read a great change. So resolution and finely-detailed are two concepts which should not be confused.

8. Drift

It is understood to be external interference, output value changed by input which is undesirable or unnecessary. Drift comprises zero - point float and sensitivity drift. Zero drift or sensitivity drift can be divided into time drift and temperature drift. Time drift is defined beneath specified conditions. The zero or sensitivity changes slowly into the future. Temperature drift is your zero drift or sensitivity drift the result of changes in ambient heat.

For temperature drift, we are able to compensate it by making process, such as using thermal insulation material because sensor housing, or deciding on a strain gauge by using self-temperature compensation, or using a material with lower temps coefficient as sensor way of measuring element.
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