TESTO 0560 8681, Instruction Manual

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6 Performing the measurement
26
Material (material temperature) Emissivity
Steel, oxidised (200 °C) 0.79
Clay, burnt (70 °C) 0.91
Transformer paint (70 °C) 0.94
Brick, mortar, plaster (20 °C) 0.93
Reflected temperature information:
Using this offset factor, the reflection is calculated out based on the low
emissivity, and the accuracy of the temperature measurement with infrared
measuring instruments is improved. In most cases, the reflected temperature is
identical to the ambient air temperature. Only when objects with strong
emissions at much lower temperatures (such as cloudless skies during outdoor
readings) or much higher temperatures (such as ovens or machines) are in
proximity to the object being measured should the radiation temperature of
these sources be determined and used. The reflected temperature has little
effect on objects with high emissivity.
@ Further information can be found in the Pocket Guide.
6.5.1 Selecting the emissivity
1 - Select the Emissivity function.
2 - Move the joystick up/down to select the required substance or
material (with fixed emissivity).
3
- Select ✔ and press OK .
6.5.2 Customizing the emissivity
1 - Select the Emissivity function.
2 - Move the joystick up/down until User defined is selected.
- Move the joystick to the right until E is selected.
- Manually set value.
3
- Select ✔ and press OK .
6.5.3 Setting RTC
1 - Select the Emissivity function.
2 - Move the joystick to the right until RTC is selected.