© PCE Instruments
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4.6
Emissivity
4.6.1
Desscription of the emissivity
Every object with a temperature above absolute zero emits thermal radiation. The emissivity is
the indicator of how much thermal radiation this object emits in contrast to an ideal thermal
radiator, the black body. The emissivity is therefore always between 0 ... 1 (0 ... 100 %). For many
applications, it is sufficient to measure with the standard value of 0.95. For a correct temperature
measurement, however, it is essential to take the correct emissivity of the surface to be measured
into account.
4.6.2
Set emissivity
You can change the emissivity via the submenu
“Emissivity”.
Press the MENU key. The current function is highlighted in blue.
The selection can be changed with the navigation keys UP or DOWN.
Confirm the selection of the "Emissivity" function with the RIGHT navigation key.
A list of the selectable emissivities appears.
•
Matt (0.95)
•
Semi-matt (0.85)
•
Semi-glossy (0.60)
•
Glossy (0.30)
•
Custom
Set the value to match the surface of the depicted object.
- Press UP / DOWN to select the desired emissivity.
- Confirm with SELECT. The selection is marked with a small circle.
- If you select "Custom", the field will turn grey and you can enter values from 0.01 to 1.00.
- Press RIGHT or LEFT to change the digit position.
- Press UP or DOWN to change the digit value.
- Confirm with ENTER.
- Press LEFT or ENTER to return to the menu list.
- Press MENU to enter measuring mode.
The current emissivity is now used in measuring mode. The emissivity is displayed at the top of
the display, for example e = 0.95.
