In an effort to combat these elements of heat exchange, make sure the radiation sources aren't set up against fans, ceiling vents or other gaps that can cause heat loss. Additionally, consider allowing the infrared thermometer time to reach room temperature. This should take a minimum of 15 minutes, during which you can set up the testing site with the specific calibration equipment.
Transfer standards: To test for accuracy you must start with an accurate tool. You will need a control probe or another highly calibrated IR gun that has been calibrated to a higher standard — ideally having been sent to and verified by a national independent lab.
Thermal radiation source: These units are typically referred to as black bodies and are defined by an approximately zero reflected ambient radiation. Whether you're using the flat plate or IR cavity model it's important to note the size of the radiation source, as that will come in handy when you're calculating the distance between your tool and the radiation. If you're using more than one black-body unit, make sure they don't face each other, as this could pass radiated energy back and forth and impede the reading.
Additionally, it's paramount that these units not be placed in the vicinity of air drafts caused by HVAC systems or similar ventilation sources, as well as other instruments that could emit radiation and throw off results. If airflow continues to be a problem, a diffuser may be necessary. Partition: To undermine any additional radiation sources outside of the target that may be emitting heat a partition can be used to limit how much the optics of an IR thermometer can be impacted and better ensure an accurate reading.
If a thermal radiation source is unavailable or out of the budget, an IR comparator cup can be a simple and inexpensive alternative to a black body. Additionally, if either of the alternatives aren't available, a properly made ice bath can be used. While measuring the boiling point with an infrared thermometer may be problematic due to other factors like condensation as well as variables in air pressure and elevation, the surface of a properly made ice bath is a solid 0 Celsius.
Mounting device: This tool allows you to get a stable measurement setup while maintaining alignment and measuring distance. Consider using a tripod, fixture or hand.
Distance measuring device: The distance to spot size ratio that you must maintain can be determined with a tape measure or measuring rod. The reality is that your device is only as accurate as its last calibration, and the calibration is only as accurate as the equipment used in the process.
Infrared thermometer calibration requires several specialized instruments, each of which must be professionally calibrated for a high degree of accuracy.
For more information on Transcat's infrared thermometer calibration capabilities, please use our Live Chat system, which is located on the right side of the page, fill out our Request a Quote form, contact us , or call Transcat directly at Infrared Thermometer Calibration Services.
Request a Quote. What's Involved in an Infrared Thermometer Calibration? With regards to emissivity, Yes, we need to determine the actual emissivity and calculate any corrections during the actual calibration. Hallo, Thank you for that. But the user will get an second measurement calibration point. For me would be the most important point what Eric wrote: the IR thermometer measures the surface temperature — nothing more, nothing less. Even from skin. Take care! VBR — Andy. That is great! I did not try this one yet but as long as you have performed the validation condition that you just mention, it is a good way to expand your verification points using water which is also readily available.
Thanks for sharing. I am interested in your electrical equipment calibration. Could you give me a quotation for the training? Thank you. Edwin C. Thank you for your interest. I will let you know. You are very professional in your field and I just joined this field. So can you help me. Best regards, Ivs Canada. Welcome to the field of Metrology. Thank you for visiting my site. Can you tell me what help do you need? This site uses Akismet to reduce spam. Learn how your comment data is processed.
Temperature Calibration. Note: If you hold your infrared thermometer too far from the surface of the ice bath or hold it at an angle, your measurement will include the sides of the glass or container or even the table it is resting on and give you an inaccurate reading.
Step 7: Taking extra care to ensure that the "field of view" the size and shape of surface area being measured is well inside the sides of the glass or container, press the button on your infrared thermometer to take a measurement.
If you perform the test correctly, and your infrared thermometer is properly calibrated, it should read within your unit's stated accuracy specification of Infrared thermometers cannot typically be calibrated at home, but they are known for their low drift.
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