Surface Tension Measurements with the program SCA20

[ally_g]

I start working with the OCA15plus tensiometer and I don't know what the three red lines that appear in the program SCA20 means and how should I position them in the image of the drop on an analysis of surface tension by pendant drop method, for example.

Can anyone help me?

 

[Borek]

Do you have a manual? Or have you tried to locate one?

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[ally_g]

Do you have a manual? Or have you tried to locate one?

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buffer calculator, concentration calculator
pH calculator, stoichiometry calculator

Yes, I do. But the manual just explain about two lines and nothing about the third.
According to the manual, you have to set the upper boundary line near the end of the dosing needle, and the secondary bounding line defines the area from which drop is taken.
But this information is not explainable enough.

 

[Borek]

Perhaps meaning of these lines is explained somewhere earlier?

 

[LudusRex]

I am familiar with the use of the OCA15plus tensiometer and the program SCA20 for surface tension measurements. The three red lines that appear in the program SCA20 are likely reference lines used to measure the contact angle of the drop on the surface. The contact angle is an important parameter in the analysis of surface tension by pendant drop method as it can provide information about the surface properties of the liquid and the solid surface it is in contact with.

To properly position the red lines in the image of the drop, you should first make sure that the drop is well-focused and centered in the image. Then, adjust the red lines so that they intersect at the three-phase contact point where the liquid, air, and solid surface meet. This will give an accurate measurement of the contact angle.

If you are still unsure about how to use the program or interpret the results, I recommend consulting the user manual or reaching out to the manufacturer for assistance. It is important to have a thorough understanding of the equipment and software being used in order to obtain accurate and reliable data in your experiments.