Distance And Measuring Spot Size; Emission Factor - Trotec TP6 Manuel D'utilisation

To deactivate this, press the laser On/Off button
The laser symbol goes out.
For measurements in the darkness the background illumina-
tion can be activated and deactivated with the background il-
lumination button .

8. Distance and measuring spot size

(Distance-to-spot-ratio D:S)
To achieve accurate measuring results the target must be
larger than the measuring spot of the infrared thermometer.
The determined temperature is the average temperature of
the measured surface. The smaller the target the shorter the
distance from the infrared thermometer must be. The exact
measuring spot size can be taken from the diagram
This is also printed on the instrument. For accurate measure-
ments, the target must be at least twice as big as the meas-
uring spot. The focal point of the TP8 is 914 mm.

9. Emission factor

The emission factor is a value used to describe the energy ra-
diation characteristic of a material. The higher this value, the
higher the capacity of the material to emit its own thermal ra-
diation, without the influence of reflections.
again.
Metal surfaces or glossy materials have a low emission fac-
tor and therefore give inaccurate measured values. Please
take this into account when using the infrared ther-
mometer.
For compensation the surface of glossy parts can be cov-
ered by matt adhesive tape or matt-black paint. The instru-
ment cannot measure through transparent surfaces such as
glass. Instead it measures the surface temperature of the
glass.
Many organic materials and surfaces have an emission fac-
tor of approx. 0.95. A table showing the emission fac-
tors of various materials can be found in chapter 14.
The infrared thermometer has a function (see chapter 10)
.
which enables adjustment of the emission factor
within a range from 0.10 to 1.00 µm so that exact measure-
ments can be obtained for various materials.
Operating manual – English
B 06