Accuracy Table - Greenlee THH-500 Manual De Instrucciones

Emissivity
Emissivity is the ability of an object to emit infrared energy. Most objects or surfaces have an
emissivity value of about 0.95. This is the preset emissivity value of the THH-500.
Some objects, such as polished or shiny metallic surfaces, may have much lower emissivity.
Using a temperature sensor to measure the temperature of such objects will produce
inaccurate results.
To determine the effect of emissivity on the measurement, cover the surface with masking tape
or flat black paint. (Be sure to use tape or paint that can withstand the anticipated temperature.
The emissivity of both these materials is about 0.95. Allow time for the tape or paint to reach
the temperature of the material underneath. Measure the covered area and a nearby area. The
readings should be about the same. If they are not, emissivity may affect your measurements.
Temperature readings will be inaccurate on highly reflective objects. Follow masking
procedures.
Failure to observe this precaution can result in injury or property damage.
Accuracy

Accuracy Table

Degrees Celsius
100 to 260
25 to 100
–1 to 25
–18 to –1
10
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Degrees Fahrenheit
212 to 500
77 to 212
30 to 77
0 to 30
Accuracy
±2%
±2 °C (±3 °F)
±3 °C (±5 °F)
±4 °C (±7 °F)