attension Theta, Руководство пользователя

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5. Analysis
5.1 Curve fitting and data analysis
The curve fitting and data analysis is done in Analysis tab after the images have been recorded in the
experiment tab. In curve fitting the profile of the drop is converted into a curve from which surface
tension and/or contact angle can be calculated.
After recording the images in the experiment tab, disable the Live analysis and move to the Analysis tab
by clicking the Analysis button in up right corner.
Choose your experiment results by clicking the preferred experiment row. Different kinds of filter options
locate in the upper part of the Analysis tab, such as experiment name and type, date and time, and user
name. These may help to find the preferred experiment. When the experiment results are opened first
time, the
software states ―Images have not been analyzed. Analyze right away with default settings?‖
(Figure 5.1). By clicking Yes, the software will automatically curve fit and analyze the results according to
the default settings shown in Drop Analysis window.
Figure 5.1. OneAttension software enables automated curve fitting and data analysis if preferred.
If the default settings are not preferred for your sample, the settings can be adjusted from the Data
Analysis window below the drop image. Curve fitting method can be chosen from the Data Analysis drop
down menu.
The Young-Laplace has been chosen to be the default setting and it can be used for all experiments,
Bashforth / Adams is just for Pendant drop experiments and Circle and Polynominal are just for Contact
Angle experiments.
Flip Y function needs to enabled when the hooked needle has been used to flip the image in data
analysis upside down. However, the image will not be flipped visually in the Analysis tab.
In case the sample surface is curved, the Use circular baseline needs to be enabled.