6 Using the product
29
Material (material temperature) Emissivity
Steel, oxidised (200 °C) 0.79
Clay, burnt (70 °C) 0.91
Transformer paint (70 °C) 0.94
Brick, mortar, plaster (20 °C) 0.93
Reflected temperature
Using this offset factor, the reflection is calculated out due to the
low emissivity and the accuracy of the temperature
measurement with infrared instruments is improved. In most
cases, the reflected temperature is identical to the ambient air
temperature. Only when objects with strong emissions with
much higher temperatures (such as ovens or machines) are in
the proximity of the object being measured should the radiation
temperature of theses heat sources be determined and used
(e.g. using a globe thermometer). The reflected temperature
has only little effect on objects with high emissivity.
Set emissivity/reflected temperature
You can choose between a user-defined emissivity and 8
materials with recorded emissivities.
The reflected temperature can be set individually.
The designation of the materials in the selection list is
configured during commissioning of the thermal imager
in the language selected by the user. A translation does
not occur in the event of subsequent changeover of the
language in the instrument.
Using the PC software, other materials can be imported
into the instrument from an existing list. The language
for the materials here depends on the operating system
language of the PC.
1. [OK] | Emissivity… | [OK].
- The Emissivity dialogue is opened.
2. Move Joystick up/down to select the desired material.
- The selected material is highlighted orange (
). The
corresponding emissivity is shown to the right next to the
material.
3. Move Joystick to the right to switch to the setting of the
emissivity (only available when selecting User defined) or
to Reflected temp..
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