DROPimage
CA is our entry-level software solution. This program ships standard
with our
Model 190 CA Goniometer and can be
upgraded to DROPimage Standard or Advanced for more demanding
applications. The two primary tools in DROPimage CA are the Contact
Angle Tool and the Calibration Command as outlined below. Additional
menus are available for: options, saving and opening images, data
export, video setup, zooming, and baseline setup. DROPimage CA uses the
same algorithms, video control, and methodology employed in the more
advanced versions of DROPimage, but lacks the surface energy and surface
tension tools.
DROPimage CA Calibration Video below:
DROPimage CA Measurement Video below:
Contact
Angle Tool
The
Contact Angle Tool characterizes the behavior of a liquid on a
solid. When a liquid is placed in contact with a solid surface, the
bare surface of the solid absorbs the vapor of the liquid until the
volatility of the absorbed material is equal to that of the liquid.
When equilibrium is established, there is a liquid-solid interface
between the two phases. The tangent angle between solid and liquid
is known as the contact angle.
Calibration
Command
When
the instrument is shipped, the system is fully calibrated. However,
if the lens assembly is readjusted to any degree or any change is
made to the magnification system, the instrument is no longer
calibrated. The Calibration command uses a ball with a precise
diameter to calibrate the magnification of the camera, resulting in
100% accurate readings. The calibration can then be verified at any
time using a calibration check utility. All ramé-hart systems ship
with a proprietary calibration tool.
The
video below shows how the Right Line option in DROPimage can be used
to measure advancing and receding contact angles manually using a
Model 190 with DROPimage CA software.
For additional
information on Model 190 and additional videos, visit
this page.
