Emissivity - Fluke TiX870 User Manual

No. Description
c
Environment Temperature
d
Humidity
e
Distance
f
Optical Transmittance
g
Base Temperature

Emissivity

Emissivity refers to the ratio of the energy radiated by the object under measurement to the energy
radiated by a black body at the same temperature and wavelength, and it is between 0 and 1.
All objects radiate infrared energy. The actual surface temperature and emissivity of the target affects
the quantity of energy radiated. The Imager senses the infrared energy from the surface of the target
and uses the data to calculate an estimated temperature value. Many common materials such as
wood, water, skin, cloth, and painted surfaces, including metal, radiate energy well and have a high
emissivity factor of ≥90 % (or 0.90). The Imager can accurately measure the temperature of targets
with high emissivity.
Shiny surfaces or unpainted metals do not radiate energy well and have a low emissivity factor of
<0.60. Adjust the emissivity settings for the Imager to accurately measure targets with low emissivity.
To prevent personal injury, see emissivity information for actual temperatures.
Reflective objects result in the temperature reading to be lower than it actually
is. These objects pose a burn hazard.
The Imager emissivity settings include Full-Screen Emissivity Correction and Area Emissivity
Correction. For Area Emissivity Correction settings, see
Table 10. Correction Parameters (cont)
 Warning
ROI Operation.
Thermal Imagers
System Menu
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