CAppendix: Determining an Unknown Emissivity

Method 3

1.Use this method to measure objects at temperatures below 500°F (260°C).

2.Place a large piece of masking tape on the object (or at least a sample of the object material). Allow time for the masking tape to reach the object temperature.

3.Set the emissivity of the thermometer to 0.95. Use the thermometer to measure and record the temperature of the masking tape - Area Ain Figure C-1. Make sure that the area of the object covered

with masking tape fills the FOV of the thermometer.

Area “A”

Target

Area “B”

Target

Figure C-1. Determining Emissivity

4.Aim the thermometer at Area Bas shown in Figure C-1 Make sure that Area Bis as close as possible to Area A.

5.Adjust the emissivity of the thermometer until the temperature reading equals the temperature found in Step 3.

C-2

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Omega Speaker Systems OS550-BB Series, OS550 Series manual With masking tape fills the FOV of the thermometer

OS550-BB Series, OS550 Series specifications

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