Name: optris Xi 80
Brand: optris
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9.2 Determination of unknown emissivity

► First determine the actual temperature of the measuring object with a thermocouple or contact sensor.

Second, measure the temperature with the infrared thermometer and modify the emissivity until the

displayed result corresponds to the actual temperature.

► If you monitor temperatures of up to 380 °C you may place a special plastic sticker (emissivity dots –

Part No.: ACLSED) onto the measuring object, which covers it completely.

Figure 52: Plastic sticker at metal surface

Set the emissivity to 0.95 and take the temperature of the sticker. Afterwards, determine the temperature

of the adjacent area on the measuring object and adjust the emissivity according to the value of the

temperature of the sticker.

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