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July
2017 |
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| Three New Videos for Your Viewing Pleasure | |
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Based on feedback from our customers, we've created a few new videos to help with several tasks. But first a word on our video series: We currently have 112,000 views on our 45 YouTube videos, some with over 10,000 views each. Visit our video home page here: https://www.youtube.com/user/ramehart. Click on "Subscribe" to be notified of new videos when they are released. We currently have 100 subscribers. The most asked question is: where is the sound? There are three main reasons why we prefer to use captions and on-screen callouts: First, many of our customers do not speak English as their primary language. They have repeatedly requested on-screen text over voice. Second, it's easier to pause and work through the task at hand - especially if you are watching the video on the same PC that you are running your instrument on. And third, many PCs don't have sound or speakers setup. Recently we've added the following three new videos: 1. Improving Surface Tension Measurements using DROPimage In the April edition of this newsletter1, we outlined a number of tips and tricks for improving surface tension measurements. Based on positive feedback and at the request of our customers, we've incorporated these tips and tricks in a new video which is now online and available for your viewing pleasure.
2. Dynamic Surface Tension We determine that surface tension decreases as temperature increases by running a dynamic surface tension experiment. Using an Environmental Chamber with DROPimage Advanced software on a Model 500 ramé-hart goniometer we raise the temperature of a pendant drop from about 50° to over 180° during a five minute span. We then graph the surface tension as a function of time and temperature as well as the change in drop volume. We determine that surface tension is more dependant on temperature than it is on drop volume.
3. How to Measure Contact Angle on Saved Images This video walks through the steps involved in capturing an image, saving it, and then later opening it and using it to take a measurement. This technique allows the user to change the method and other options without going through the steps of dispensing a new drop. It can also be used to verify data that was previously collected.
1 Visit the April 2007 Newsletter here: http://www.ramehart.com/newsletters/2017-04_news.htm. |
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| We Take Requests | |
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Most of the videos we make are at the
request of our customers. If you would like to suggest an idea for a
video that we don't already have, please do
contact us and let us know. We will add it to the video wish
list. Many thanks for watching our videos and we appreciate your
continued business. |
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Regards,
Carl Clegg |
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