Two years ago we started a video vlog showing some everyday ways to use the infrared technology. Thought we would revive that video series here and begin some new ones. Here is the Utterly Awesome Vlog that kicked it all off. A little story about using the infrared cameras to see a pile begin to self combust. A good way for those maintaining refuse facilities from having fires that could become a big problem. Hope you enjoy it and get something out of it. Let us know what you think!
The hotel provided an amazing lunch again while our instructor graded our tests. We were able to connect and network with others before people started to head out, but some of us stayed to hear the results and go through the test to see what we missed.
The moment of truth was here...
I PASSED! I PASSED! We got our tests back and I found that I had missed 4 questions. I was pretty happy with the results because we couldn't miss more then 15. I felt pretty good about it and was happy to find that a lot of what I learned stuck with me. We went through the questions we had and then wrapped up the course.
I had a really good time and I really appreciated the knowledge of our instructor and everyone else that was in the room. I learned a lot from the material, but also from the experiences of those around me. I had a great time and I feel way more confident with infrared thermography then I did before I went. It was time to get back home and use what I learned.
Travel back to Nebraska seemed like it took forever… but doesn’t it always happen like that? You always want to be home after a long time away and there isn’t much that is sweeter than sleeping in your own bed. The trip was smooth and I got to see some lighting below from up above the clouds, which is one of the coolest things to experience. I had a great time and learned a lot. I am ready to get out and start using what I learned at the training. All I have to do now is get my field assignment in and then I am officially a level 1 Thermographer!
Don’t fret though...Just because my training days are over, doesn’t mean I want to stop learning or helping you learn. I am still on the journey of becoming a thermal warrior, so don’t go away too soon. The thermal journey is a constant learning process and I hope you want to stay and learn with me and share your experiences so we all can benefit from each other’s backgrounds, experiences, and knowledge!
See you next time…
Sorry I missed posting last week! I have been out in the field gaining a lot of experience lately. It has been great!
Anyways, last time we talked in depth about concepts that are really important to understand when learning about thermography. Today I am just going to talk a little about what happened on the last day of infrared training. The day started out like every other morning that week... got some breakfast and drank a LOT of coffee. The weather wasn’t the best, so I left a little earlier to make sure I didn’t get stuck on a bad road. Snow wasn’t exactly what I wanted to see, but… DENVER.
The morning started off by looking through different mechanical and building applications. I will probably write a full blog post about applications another time, just because I think they are very interesting and worth looking into more closely. Plus, knowing these different applications can help you determine what kind of infrared scans you need/could be doing.
We also went over what we had to do for our field assignment. This is something that is required of you to become certified as a Level 1 thermographer. It has to consist of a quality infrared image and it must have a full report attached to it. There is a checklist of things that must be submitted on the report, but I will let you find out more when you sign up to become certified! (PS-have I mentioned we offer this class? Our President is a level 3 thermographer and can instruct you to become a certified thermographer!) The field assignment sounds kind of daunting at first, but after the week of training it gets less scary. Before I could even get going on my field assignment though...
The time had come for us to take our test and show what we had really learned. Most of us were ready to take the test to get it over with because the information was fresh in our minds.The test was 40 multiple choice questions that contained anything and everything from the material we learned from the week. I felt like the questions got harder as the test went on, but I may have just been fading from lack of caffeine...too hard to tell.
I handed the test in and awaited my fate. My stomach was grumbling and lunch awaited us after we finished. Although I wanted to know my test score as soon as possible, I had to wait until after lunch to discover the results. Stay tuned for next week to hear how my test went and to see if I traveled back to Nebraska with a passing grade or not…
To be continued…
Did you know that hot always flows towards cold? Knowing this can be of huge help to a thermographer. A flow of thermal energy will occur when there is a difference in temperature between two objects. Heat transfer is a big deal in the infrared thermography world, and we talked a lot about it today. We, as professionals in the thermal imaging world, must understand how this works in order to accurately analyze what is going on in an image. We also must understand the difference between convection, conduction, and radiation and the concept of heat capacity. To the left is an image that can help you visualize the difference between some of these concepts.
Conduction- The transfer of heat energy through a material (solid, liquid, or gas) by the motion of adjacent atoms and molecules.
Below, the heat from the burner to the pan is an example of conduction. Also, the walls of a home that are insulated or not insulated show up in an infrared camera because of conduction.
Convection- Heat transfer due to bulk movement of a fluid.
Below, the bluish streaks below the window you see under the window is caused by convection. We also have seen convection occurring when balloons are let go at a football game and are carried aloft as a result of warm air rising.
Radiation-The process of transferring energy by electromagnetic waves. No medium required!
- Heat is transferred by emission & absorption
- Both objects emit and absorb radiation
- Radiation occurs from all object above 0 degrees Kelvin (That’s really cold!!)
On the right, heat is being emitted by the coals of the grill and radiating to us and any food that would be held over them. This is also how the sun heats us and the earth.
The hard thing here is to remember that even cold things emit and absorb infrared radiation. It isn’t just only the warm stuff that we see when using the infrared camera as shown by the images taken from a freezer shown below.
Heat Capacity is the ability to store heat. Objects with high thermal capacity react slower to temperature changes, meaning they require more energy to change their temperature. Water has a pretty high thermal capacitance, and knowing this can help us with a few things. Watching a target when it is heating or cooling may offer diagnostic clues. For instance, with water being of high thermal capacitance, it tends to be easy to see when their are leaking problems on a roof. After a long day in the sun, water that is on the roof soaks up the sun (called solar loading) and keeps that energy longer. When an IR inspection is done, the water shows up easier on a scan because it does not cool down as quickly as its surroundings. You can point out where the water is as long as the temperatures allow for it...which may mean you have to go inspect in the middle of the night!
The rest of the day we talked about using infrared for electrical applications, but I will talk more about these in a later blog post. We ended the class with more labs and practice with our cameras. We had time to ask questions and get familiar with everything that we were taught. We also went through a study guide for the test that was coming up on us very quickly! Oh..did I mention I didn't miss any on the quiz? Woo!
This was the last full day of training. In class on the last day, we go over a few more applications and then review for the test. This week has flown by! I cannot believe how much stuff we have gone through. Here is to getting a good grade on the test! Cheers!
P.S.- Come back next week and hear how my last day went!
First of all, before I dig into what happened in class the third day, I wanted to tell you how amazing the hotel that hosted this training has been treating us. They not only serve us amazing snacks and coffee (and other lesser beverages) all day long, they also do whatever they can for us when needed. The Denver Renaissance Hotel did a fantastic job! Anyways, I just wanted to mention them because I appreciate great customer service!
Back to the good stuff.
Today was all about heat transfer and how that plays a role in infrared thermography. The morning hours were full of learning about conduction, convection, and radiation.We also talked about electrical applications for infrared thermography (which I will cover in a future blog post.) We were crunched for time yesterday during labs, so instead of spending all day in the book and hearing lectures, we were given 3 hours to play with our cameras and put into practice what we learned from the morning and what we have learned the last few days. Having 3 hours seems like a long time, but when you are trying to learn how to effectively use your camera, the time flies. We made sure we knew how to set our parameters correctly to get the best thermal image possible. Parameters such as emissivity, temperature, distance, ambient temperature, and more. There is a lot to the basic setup and although I did not explain much about the process, which we learned on day 1, it is extremely important to have the correct information in the camera settings before taking an infrared image. There is a lot to this process, so I will leave it up to you to get yourself to a training course to learn more about all of these features! Having these basic skills will make a huge difference in the long run.
I still need to figure out how to explain some of these things to you, so next week I will talk more in detail what I learned from today...I will skim over some of the tougher concepts using different images to help explain them as best as I can. Before next week, however, I recommend watching the video below to get you thinking more about infrared thermography.
Hang in there, thermal warriors!