One of the easiest, and often safest, types of electrical apparatus to inspect are oil-filled transformer cooling [...]
This time we’re finishing up our discussion of thermal diffusivity before moving on to further discussion of thermodynamics. Hopefully taking these topics a step at a time is doing its job and will allow you to absorb the knowledge more easily, and hold onto it longer.
In The Snell Group’s Level I course, we see several [...]
We’re partly through our discussion of thermal diffusivity in our series on basic thermodynamics for the field thermographer. It is not our intent to have the reader become an expert in heat transfer theory. But it is important to understand the variables that effect thermal diffusivity and how this concept impacts the thermal world we [...]
The punch line to the old joke, “How do you get to Carnegie Hall?” is three simple words, “Practice, practice, practice.” The same would hold true if there was a thermographic equivalent to Carnegie Hall. You’d get there with practice … lots of it!
Some folks who come to Level I infrared training, however, express that [...]
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The choices in the infrared camera market extend beyond just camera features like resolution, Bluetooth capability and storage card size. These days the market of infrared camera accessories is a separate category in its own right. Additional lenses are among the most popular choices for addition to your basic thermal imaging camera platform, but does [...]
Last week I talked about how to move yourself and your imager into the best position to get good thermal data. Another big part of being successful is understanding and following professional thermography standards. Like a good time-tested recipe, these help us get high quality, consistent results.
As I’ve said before, I’ve made plenty of mistakes [...]
We’ve spent the past several weeks discussing heat transfer. Radiation is a special mode of transfer because that is the mode by which energy is transferred from surfaces to our imagers.
All of what we see in the thermal image is nearly always based on the amount of radiation emitted from or reflected by the surface. [...]
As we continue the discussion about convective heat transfer, it is useful to define two types of convection, natural and forced. When quantities of fluids are moved in either way, we also use the term “bulk energy transfer” because it is really the movement of the fluid itself, and the energy inherent in it, that [...]