Distance & Spot Size - Amprobe IR-450 Mode D'emploi

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Make sure that the target is larger than the unit's spot
size. The smaller the target, the closer you should be
to it. The minimum measurement area is 3.75cm (1.5in)
diameter.
Press the key, and the unit will show the
temperature of the target surface. Then release the
key, and the LCD will hold the reading for 10 seconds.
Press the key for 3 seconds, the unit will turn into
the IR temperature continuous measurement mode.
°F / °C Temperature Selection
Press the Test button and the Flashlight button for
2 seconds at the same time for switching between
Fahrenheit and Celsius.
Distance and Spot Size
As the distance (D) from the object increases, the spot
size (S) of the area measured by the unit becomes larger.
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