optris optris PI 640 G7, Operator'S Manual

Page: 83 / 96

Emissivity 83 -
8.3 Characteristic emissivity
In case none of the methods mentioned above help to determine the emissivity you may use the emissivity
table ►
Appendix A and Appendix B . These are average values, only. The actual emissivity of a material
depends on the following factors:

temperature

measuring angle

geometry of the surface

thickness of the material

constitution of the surface (polished, oxidized, rough, sandblast)

spectral range of the measurement

transmissivity (e.g. with thin films)
Figure 51: Adjustment of the emissivity in the software PIX Connect (menu
Tools/ Configuration/ Device
)