Getting Started With Infrared Imaging
The first thing most people get wrong about thermography is assuming the camera tells you the absolute temperature of something. It doesn't. It measures infrared radiation and calculates a temperature based on several assumptions you have to set manually. If those assumptions are wrong, your numbers are wrong, and there is no software correction that will fix that afterward. Thermography Training Level 1 is the entry-level certification that teaches you how to operate an infrared camera and produce useable images, but it does not teach you how to diagnose complex systems or interpret results across varying environmental conditions. That comes later. The training itself covers basic camera operation, understanding emissivity, setting reference targets, and producing a reportable image with proper documentation.
Thermography Training Level 1
Most Level 1 courses run between one and two days depending on the provider and the curriculum requirements of ISO 9712 or ASNT standards. You learn how to navigate your camera menu, how to select the right temperature range, how to adjust focus (most cameras have a minimum focus distance that people routinely ignore), and how to capture an image that includes enough visual context to be useful later. Here is what the actual process looks like when you are out in the field. You start by identifying the component you are inspecting and noting its material. That matters because different materials emit infrared radiation at different rates. Polished aluminum has an emissivity around 0.05. Anodized aluminum jumps to about 0.75. Painted steel sits near 0.90. If you are measuring a painted electrical conduit and your camera is set to 0.95, your reading could be off by several degrees. That might not seem like much until you are trying to decide whether a connection is within tolerance or trending toward failure.
I once spent an afternoon inspecting a distribution panel where the breaker lugs were showing temperature anomalies. The readings looked elevated but borderline. I switched to using a piece of electrical tape as a reference patch on the busbar next to the lug, which gave me a more accurate emissivity baseline. The corrected reading was eight degrees higher than my initial measurement. That pushed the finding from questionable into clearly requiring follow-up. I still kick myself for not doing that first. So the practical workflow goes like this: approach the target, visually inspect the surface condition, apply a temporary emissivity reference if possible, set your camera to manual mode for temperature range, focus manually at the correct distance, capture the image, and document everything. Document what the camera settings were, what the ambient conditions were, and what surface treatment you used. Three months from now when you are trying to compare this image to a follow-up scan, you will be grateful you did. There are a few things that Level 1 training doesn't emphasize enough.
Get the Full Details
First, reflected temperature is often more important than ambient temperature. The camera allows you to enter a reflected temperature value, and if you skip this or guess wrong, you introduce error. The best way to handle this is with a mirrored sphere or a sheet of aluminum foil shaped into a ball. You hold it in front of the target, point the camera at the reflection, and read the temperature the camera reports. That is your reflected temperature. It takes about thirty seconds and eliminates one of the biggest sources of measurement error. Second, the distance between you and the target changes the apparent temperature reading if you are not accounting for atmospheric absorption. This matters more at longer distances. Beyond ten meters, especially in humid conditions, the air itself absorbs infrared radiation. For most building diagnostics and electrical inspections, this is negligible. For industrial applications where you are working at twenty or thirty meters, it becomes a real factor. The main limitation of Level 1 thermography is that you are trained to capture and flag anomalies, not to diagnose them. You will learn to identify that something is hotter than it should be, but you will not learn why. That requires Level 2 training and substantial hands-on experience. You should also understand that thermography has blind spots. It cannot see through glass, which means you cannot use an infrared camera to check the temperature inside a sealed electrical enclosure through the window. It cannot penetrate most building materials, so you will not find hidden water damage through drywall with reasonable confidence without extensive training and the right conditions. It is surface-level detection only.
If you are working in environments where emissivity is unknown and cannot be estimated, consider combining thermography with contact thermometry. A thermocouple or resistance temperature device will give you a ground truth reading that you can use to calibrate your infrared expectations for that specific material and surface condition. When you are ready to find a course, look for providers accredited under ISO/IEC 17024 or affiliated with recognized bodies like the American Society for Nondestructive Testing. Check whether the curriculum covers both electrical and building diagnostics, since some programs specialize in one area. The training manual materials are sometimes available as PDFs from certifying organizations if you want to preview the content before enrolling.
