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A Review of Temperature Measurement of Fire Driven Flow Using Thermocouple - Measurement Bias  

Kim, Sung-Chan (경일대학교 소방방재학부)
Publication Information
Fire Science and Engineering / v.24, no.6, 2010 , pp. 98-103 More about this Journal
Abstract
A series of fire experiments have been performed to examine the measurement bias of the bare bead thermocouple widely used in fire testing and analyze the measurement bias of bare bead thermocouple comparing with the measured temperature using the aspirated thermocouple. The measured temperature of the bare bead thermocouple was lower than that of the aspirated thermocouple in the hot upper layer while it showed opposite trends in the upper layer. Also, the bare bead thermocouple showed higher measurement bias in the lower layer rather than upper layer in the compartment fire. The maximum relative percentage error of the bare bead thermocouple against the aspirated thermocouple reached 250% in the present study. The present study points out the need of correction process of the measured temperature by bare bead thermocouple for improving the reliability of the fire tests.
Keywords
Thermocouple; Temperature measurement; Measurement error; Fire test;
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