Structure Of Emission Thermometer; Emissivity; Specials Attentions - Minipa MT-360 Manual De Instrucciones

6.3 Structure of Emission Thermometer

Infrared radiation that has been emitted from the ob-
ject is focused upon an infrared radiation sensor,
via an optical system. This includes a lens that is
transparent to infrared radiation. And 5.3µm cut off
filter. The output signal from infrared radiation sen-
sor is input to an electronic circuit along with the
output signal from a standard temperature sensor
(Thermopile).

6.4 Emissivity

All objects emit invisible infrared energy. The amount
of energy emitted is proportional to the object's tem-
perature and its ability to emit IR energy. This ability,
called emissivity, is based upon the material that the
object is made of and its surface finish. Emissivity
values range from 0.10 for a very reflective object
to 1.00 for a black body. Therefore the value of the
emissivity must be adjusted in the instrument ac-
cording to the object to be measured.

6.5 Specials Attentions

• If the surface to the measured is covered by frost
or other material, clean it to expose the surface.
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