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User Manual for the Thermographic System VarioCAM

9 Operation

The thermographic camera VarioCAM

of the atmosphere onto the measured result can be neglected in this range in most measurements –

transmissivity is defined to be 1.00. Only in measurements over longer distances (from approx. 100 m) and/or

through additional window materials, gases and fog, transmissivity decreases and the path temperature,

transmissivity and distance should be determined and entered.

With the parameter distance, a preset value is generated depending on the current focussing, which

only serves as rough orientation. The input of a distance has no effect on the focus adjustment!

Menu item "Material table"

Fig. 105

Menu "Measure" - "Material table.."

The menu item "Material table.." opens a dialogue (see Fig. 106) listing emission values of various

materials. The appropriate material can be selected here. Afterwards the emissivity for the selected

material is preset.

Tables regarding emission properties provide only rough orientation for the properties of the

respective materials, since the emission properties depend on the actual nature of the surface

(roughness, contamination, oxidisation...), on the angle to the surface normal, on the spectral range

and surface temperature and, therefore, might strongly fluctuate!

9.6.4

Menu "Settings"

Fig. 107

Menu "Settings"

Fig. 107 shows the menu Settings. It includes all functions for setting the hardware of the VarioCAM

User Manual

hr head

hr head works in the wavelength range from 7.5 to 14 µm. The impact

Fig. 106

Dialogue "Material table"

hr.

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