Omega Speaker Systems OS523E User Manual download pdf (Page 77)

Appendix: Determining an Unknown Emissivity

C-2

Method 3

1. Use this method to measure objects at temperatures below 260°C

(500°F).

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

‘A’ in Figure C-1. Make sure that the area of the object covered

with masking tape fills the FOV of the thermometer.

Figure C-1. Determining Emissivity

4. Aim the thermometer at Area ‘B’ as shown in Figure C-1 Make

sure that Area ‘B’ is 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.

Area 'A'

Target

Area 'B'

Target

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Omega Speaker Systems OS523E User Manual Page 77