SIZE OF SOURCE EFFECT OF A TRANSFER REFERENCE THERMOMETER SUITABLE FOR INTERNATIONAL COMPARISONS NEAR TO ROOM TEMPERATURE
Yong Shim Yoo, Bong-Hak Kim, Chul-Woung Park, Dong-Hoon Lee, Seung-Nam Park
Abstract:
We measured the size-of-source-effect (SSE) of a transfer reference thermometer (TRT) for the low-temperature mode with the spectral range from 8 µm to 14 µm by using the direct method. The measurements were carried out for various blackbody temperatures from 10 °C to 300 °C. The size of source changed from 10 mm to 80 mm in diameter. Taking the radiation from the masked area of the aperture plate and its surroundings into account, we observed that the SSE curves measured at various temperatures overlaps well. The SSE functions show a two-step saturation behaviour unusually. Excluding the data obtained near the room temperature, the values of the SSE functions agrees within 0.05 %.
Keywords:
radiation thermometry, size of source effect, international comparison
Download:
IMEKO-WC-2009-TC12-233.pdf
DOI:
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Event details
Event name:
XIX IMEKO World Congress
Title:

Fundamental and Applied Metrology

Place:
Lisbon, PORTUGAL
Time:
06 September 2009 - 11 September 2009
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