InfraTec VarioCAM User Manual page 58

The ambient temperature is the temperature which the thermographic system detects via the more or less
reflecting object to be measured. This temperature is not necessarily equal to the temperature of the
thermographic system itself or that of its immediate environment.
A reduction of the emissivity below 1.00 will result in an effect of the ambient temperature onto the
measured result. Therefore, it must be determined and entered in such a case at any rate.
Example: A low ambient temperature (e.g. cold night sky) makes a reflecting measuring object (e.g.
windows in a house) appear colder to the thermographic system than it actually is. In the thermal image,
windows (of lesser heat insulation) may at first sight appear colder – allegedly better heat-insulated – than
the better insulated facçade.
Fig. 99 Menu "Measure" - "Path temperature.."
Fig. 101 Menu "Measure" - "Transmissivity.."
Fig. 103 Menu "Measure" - "Distance.."
36
User Manual for the Thermographic System VarioCAM
Fig. 100
Fig. 102
Fig. 104
© InfraTec GmbH 2015
Dialogue "Path temperature"
Dialogue "Transmissivity"
Dialogue "Distance"
®
hr head
9 Operation
User Manual