The inclusion of different calibration functions, such as linear and polynomial, in the Automatic Shear Testing Machine (NG-Shear DGEN) offers substantial advantages for precision and versatility in testing. These calibration options allow the machine to be finely tuned to match the specific characteristics of the material being tested, ensuring that the force and displacement measurements are accurate and reliable.

Linear calibration is ideal for materials and test conditions that exhibit a direct relationship between applied force and the resultant displacement. This provides simplicity and ease of use for standard testing scenarios. On the other hand, polynomial calibration can accommodate more complex relationships, where the material response may not be linear across the range of applied forces. This is particularly useful for advanced geotechnical testing where soil behavior under shear stress may exhibit non-linear characteristics due to varying moisture content, particle size distribution, or other factors.

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