UNCERTAINTY EVALUATION OF THERMOCOUPLE MEASUREMENT SYSTEM IN VACUUM THERMAL TEST
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Abstract
Thermocouple measurement system is widely used in vacuum thermal test.Temperature measurement system cannot be calibrated,because it uses a large number of thermocouple,and the temperature result is affected by temperature field changes of built-in referenced device.Uncertainty analysis and evaluation of thermocouple measurement system is given,according to the principle and the computational formula.Through experimentation with RTD(Resistance Temperature Detector),uncertainty evaluation of thermocouple measurement system is confirmed.
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