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2015-07-07
User Manual SONO-VARIO Standard/Xtrem
4.3. Nonlinear calibration curves
SONO probes can also work with non-linear calibration curves with polynomials up to 5th grade.
Therefore it is necessary to calibrate with 4…8 different calibration points. To calculate nonlinear
coefficients for polynomials up to 5th grade, an EXCEL software tool from IMKO can be used (on
request). It is also possible to use any mathematical program like MATLAB for finding a best possible
nonlinear calibration curve with suitable coefficient parameters m0 to m5 which can be entered into the
probe with help of SONO-CONFIG.
The following diagram shows a sample calculation for a linear calibration curve with the coefficients
m0 and m1 for a specific material.
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