Fluke 63 - How the Thermometers Work; Basic Operation; Temperature Measurement Procedure; Locating Hot;Cold Spots

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Infrared Thermometers
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Reflected energy
Emitted
Energy
Transmitted energy
Target
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Figure 3. How the Thermometer Works
Operating the Thermometer
Temperature Measurement
To measure temperature, point the unit at an object and pull the
trigger. Be sure to consider distance-to-spot size ratio and field of
view. The laser is used for aiming only.
Locating a Hot or Cold Spot
To find a hot or cold spot, aim the thermometer outside the desired
area. Then, slowly scan across the area with an up and down
motion until you locate the hot or cold spot. See Figure 4.