The activity dispersion along the catheter can be estimated and corrected, typically by monoexponential deconvolution [18, 19] or step function calibration [20], but this was not implemented yet for the prototype device presented here.
For consistent hardness measurements, four precautions must be observed: (i) proper tip-area function calibration, (ii) using sharp indenters, (iii) performing nanoindentation measurements with minimal thermal drift and with drift correction, (iv) using smooth samples, and (v) measuring the full hardness maximum penetration curve.
In our study, the type of responsivity function (calibration curve) was tested and the exponential function was fitted to the measured calibration curves.
Hence, some other methods accompanying the acquisition of autocalibration signals (ACS) near the central k-line were developed for the sensitivity function calibration, such as AUTO-SMASH [ 120] and VD-AUTO-SMASH [ 121].
Preoptimized scan functions and calibration functions for different types of targeted analysis were stored on the tablet computer.
The active stand protocol included the use of the automatic physiocal function (physiologic calibration that calibrates the finger arterial size at which finger cuff air pressure equals finger arterial blood pressure).
For the comparison, the calibration functions provided by the manufacturers are applied for each sensor type.
Calibration functions established from data sets of a first goat were validated with data from a second goat fitted with the same harness type.
Table 2 Correlation coefficients (R2) and slopes [counts s-1 (μg g-1 -1] g-1 -1]calibratiof functhens obtained for linear regression analysis of LA-Icalibrationfunctionsed cobtainedn tablets (n = 7).
However, the calibration functions provided by instrument manufacturers are generally developed under laboratory conditions, and their accuracy for field applications is rarely investigated, in particular over long time periods and in comparison with other sensors types.
