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Operating Instruction for Thermal Imager
5-5.Focus
• To adjust focus, clockwise or Anti-clockwise rotates the IR Lens.
• When target comes into focus, it shows a sharper image.
• When the target moves out of focus, the thermal image becomes blurry.
Note: Correct focus is important in all imaging applications. Correct focus makes sure that the infrared energy is
correctly directed onto the pixels of the detector. Without the correct focus, the thermal image can be blurry and
the radiometric data will be inaccurate. Out-of-focus infrared images are frequently unusable or of little value.
5-6.Shutter
• The thermal image of the Thermal Imager becomes blurry, when the Thermal Imager no correcting after some
minutes or the Thermal Imager changes target.
• To get fine thermal image, the Thermal Imager need to correct.
• The Thermal Imager has two mode for correcting, Manual and Auto mode.
• In Manual Mode, long press the down arrow button, the Thermal Imager will correct.
• In Auto Mode, the Thermal Imager can correct automatically while The thermal image of the Thermal Imager
becomes blurry.
5-7.Temperature Measurement
• All objects radiate infrared energy.
• The quantity of energy radiated is base on the actual surface temperature and the surface emissivity of the object.
• The Thermal Imager senses the infrared energy from the surface of the object and uses this data to calculate an
estimated temperature value.
• Many common objects and materials such as painted metal, wood, water, skin, and cloth are very good at radiating
energy and it is easy to get relatively accurate measurements.
• For surfaces that are good at radiating energy (high emissivity), the emissivity factor is >0.90.
• This simplification does not work on shiny surfaces or unpainted metals as they have an emissivity of <0.6, These
materials are not good at radiating energy and are classified as low emissivity.
• To more accurately measure materials with a low emissivity, an emissivity correction is necessary.
• Adjustment to the emissivity setting will usually allow the Thermal Imager to calculate a more accurate estimate
of the actual temperature.
• More information please see Emissivity Adjustment to get the most accurate temperature measurements.
Focus to get
clear image
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