Opal DT-8862, Manual

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instrument and replace with a new 9-Volt battery and place the
battery cover back.
6 . NOTES:
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How it Works
Infrared thermometers measure the surface temperature of an
object. The unit’s optics sense emitted, reflected, and
transmitted energy, which is collected and focused onto a
detector. The unit’s electronics translate the information into a
temperature reading, which is display on the unit. In units with
a laser, the laser is used for aiming purposes only.
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Field of View
Make sure that the target is larger than the unit’s spot size.
The smaller the target, the closer you should be to it. When
accuracy is critical, make sure the target is at least twice as
large as the spot size.
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Distance & Spot Size
As the distance (D) from the object increases, the spot size (S)
of the area measured by the unit becomes larger. See: Fig: 1 .
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Locating a hot Spot
To find a hot spot aim the thermometer outside the area of
interest, then scan across with an up and down motion until
you locate hot spot.
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Reminders
①
Not recommended for use in measuring shiny or polished
metal surfaces ( stainless steel, aluminum, etc.).See
Emissivity
②
The unit cannot measure through transparent surfaces such as
glass. It will measure the surface temperature of the glass
instead.
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