Surface Tension Measurements with the program SCA20

AI Thread Summary
The discussion revolves around the OCA15plus tensiometer and the confusion regarding the three red lines displayed in the SCA20 program during surface tension analysis using the pendant drop method. Users seek clarification on how to position these lines in relation to the drop image. The manual provides guidance on the upper boundary line, which should be set near the end of the dosing needle, and the secondary bounding line, which defines the area from which the drop is analyzed. However, the manual lacks detailed explanations about the third line, prompting users to inquire if additional resources or manuals exist that might clarify its purpose. There is a call for assistance in understanding the positioning and significance of all three lines for accurate analysis.
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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?
 
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Do you have a manual? Or have you tried to locate one?

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Borek said:
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.
 
Perhaps meaning of these lines is explained somewhere earlier?
 

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