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The red line shown in the image is the baseline, which denotes the level of the solid or liquid surface for
Contact angle and Meniscus experiments and the tip of the needle for Pendant drop experiments.
Automatic baseline has been chosen to be the default setting; however some surfaces (e.g. very rough
surfaces) may demand to set the base line manually, when the Use automatic baseline need to be
disabled from the Data Analysis. The Test autobaseline button displays where the auto baseline will
place itself. Use this to verify that the baseline is set correctly. The Allow tilt option allows raising or
lowering the right or left side of the baseline. The baseline can be straightened by double clicking the
baseline.
If all the data points are analyzed with the same settings, the Analyze all option can be used from the
Data Analysis window. Any group of data points can be also chosen for the analysis by clicking on a row
which highlights the selected data point(s). In this case, select the experiments which you prefer to
analyze and then choose the preferred Data Analysis settings, after which you can select Analyze
selected as shown in Figure 5.2. Undesirable data points can be hidden by right clicking the mouse and
choosing Hide selected rows. The hidden data points can be returned from Show hidden rows.
Fitting can be stopped at any time by clicking Stop from the Data analysis window.
The quality of the curve fitting performed may be inspected visually during the fitting. A turquoise line is
superimposed on the image and the calculated values will be shown in the image. The turquoise line
represents the fitted curve and the green line the fitted baseline. If this line does not display an
acceptable convergence with the actual profile it is possible to change the fitting parameters, repeat the
fitting.
Figure 5.2.
Curve fitting and data analysis options can be set also manually from the Data Analysis
window for chosen data points.
Содержание Theta
Страница 1: ...Theta User manual OneAttension Optical Tensiometer Revision 1 0...
Страница 3: ...6 3 Theory of surface free energy 65 7 TECHNICAL SPECIFICATIONS 70 8 CONTACT INFORMATION 71...
Страница 41: ...38 Figure 4 15 Device controls and recipe sheet parameters for multiliquid dispenser...
Страница 54: ...51 Figure 4 30 Analysis tab of the PD 200 experiment Figure 4 31 Calculated results...