mru 500GD, Руководство пользователя

Страница: 30 / 52

User manual 500GD
30 / 52
MRU GmbH, D-74172 Neckarsulm
Configuring measurement
For settings that can be made on the basic unit

See also chapter 4.4.Make settings on the basic unit, Page 15.
In the following, only sensor-specific settings are described.
Setting emissivity
Measuring objects emit infrared radiation.
The interchangeable sensor IR400 detects the infrared radiation emitted
and calculates the temperature from it.
The emissivity describes the ability to of a body to release infrared en-
ergy into its environment. The emissivity is given on a scale between 0
and 1. A black body is considered an ideal radiant heater and thus has
an emissivity of 1. High emissivities between 0.8 and 1.0 are found in
many non-ferrous metals with low reflective surfaces such as wood,
stone and concrete and are well suited for IR measurement.
However, metals, especially those with polished or shiny surfaces, can
have an emissivity of 0.1 and are poorly suited for IR measurement.
Set the corresponding emissivity before the measurement.
Otherwise, there may be large deviations in the measurement.
Emissivity of important materials:
Material emissivity ε
Aluminium 0,02 – 0,31 (oxidized)
Concrete 0,93
Iron 0,13 – 0,85 (corroded)
Tiles 0,93
Glass 0,94
Rubber 0,94
Wood 0,94
Copper 0,03-0,76 (oxidized)
Plastics (PE, PP, PVC) 0,94
Brass (oxidized) 0,61
Black lacquer (matt) 0,97
Clay burned 0,91
Brick, Mortar, Plaster, Gypsum 0,9-0,95
The emissivities given here serve as a rough orientation and may vary
greatly depending on the variation of the material (e. g. not oxidized to
oxidized). Research the emission levels relevant to you, e. g. on the
Internet or in the relevant specialist literature.