By Grainger Editorial Staff 9/14/23
Preventive maintenance is a proactive maintenance approach involving inspecting and servicing equipment regularly to help prevent breakdowns by catching problems early on. While closely related, predictive maintenance is a more advanced approach using data and analysis, rather than a preset maintenance schedule to predict when equipment will likely fail. Facility managers and technicians can use thermal imaging inspections in both types of maintenance programs to help address common building and equipment issues. Learn more about how thermal imaging cameras work and can help identify potential problems before they become costly issues.
Thermal imaging uses infrared radiation to create images of temperature differences in a space. Colors are assigned based on the temperature differences the imaging measures, offering a contactless way to access critical components that are too difficult to access for traditional temperature measurements.
From HVAC systems to building envelope inspections, thermal imaging can help detect problems in all types of equipment, including:
Overheating electrical components and loose connections can lead to electrical failures and pose fire hazards. Thermal imaging cameras can identify these issues by detecting abnormal temperature variations, enabling technicians to take action quickly.
Malfunctioning HVAC components, like motors, fans and compressors, can affect energy efficiency and comfort. Using thermal imaging cameras, technicians can quickly pinpoint potential problems, like poor insulation or blocked air vents, allowing for timely repairs and preventing major disruptions. Thermal imaging inspections can also help isolate cold and warm air infiltration issues so that energy efficiency improvements can be made.
According to Reliable Plant, heat is often an early warning sign of equipment damage or failure, making it important to monitor. Thermal imaging cameras can help identify temperature abnormalities in mechanical equipment like pumps, motors and bearings.
Thermal cameras play a critical role in preventive and predictive maintenance by helping identify subtle temperature variations that may indicate early-stage equipment issues.
With regular thermal inspections, technicians can:
Using thermal imaging for predictive maintenance offers a non-invasive way to inspect critical systems and components, potentially saving time and resources, and helping ensure the longevity of important building systems.
Q: What’s the difference between thermal and infrared imaging?
A: While thermal and infrared imaging are often used interchangeably, there are some key differences between the two. According to Optics Mag, the main difference is that thermal imaging creates images based on the heat emitted by objects, while infrared imaging uses all light wavelengths of infrared radiation to capture images. Thermal imaging cameras can help detect temperature abnormalities across large areas or identify hot spots in electrical systems or equipment. Infrared cameras and thermometers can precisely measure the temperature of specific points on an object.
Q: How often should thermal imaging be done?
A: The frequency of thermal imaging inspections will vary depending on the type of equipment and the environment in which it operates. However, it’s generally recommended to conduct thermal imaging inspections at least once a year. For example, updates in 2023 to NFPA 70B made the inspection of all electrical equipment every 12 months mandatory, and equipment meeting Equipment Condition 3 must have a thermographic inspection at least every six months.
Q: What are some important considerations when choosing a thermal imaging camera?
A: How you will be using the camera, the temperature range you need to measure, whether you need to be connected and whether you have to report out on your findings are four of the important factors to consider when choosing a thermal imaging camera.
Q: What type of training is required to operate infrared or thermal imaging cameras?
A: Operating an infrared camera requires specialized training due to its complexity and advanced capabilities compared to point and shoot thermal imaging cameras or thermometers. Training and certification programs focus on thermography principles, how to accurately interpret thermal images and using proper measurement techniques and settings to ensure reliable results. Professionals learn how to adjust camera settings, interpret color codes and account for factors that can affect measurements.
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The information contained in this article is intended for general information purposes only and is based on information available as of the initial date of publication. No representation is made that the information or references are complete or remain current. This article is not a substitute for review of current applicable government regulations, industry standards, or other standards specific to your business and/or activities and should not be construed as legal advice or opinion. Readers with specific questions should refer to the applicable standards or consult with an attorney.