Stochastic two-bit on-line temperature measurement with RTD Pt-100 sensor operating in a nonlinear mode
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The paper proposes a method and device for on-line temperature measurement with Pt-100 sensor operating in a nonlinear mode. The sensor measures the temperature in range of 00C to 2000C, whereas the measured data are processed by applying a two-bit stochastic digital measurement method. The proposal is theoretically analyzed and tested experimentally. It is shown that the accuracy of the method depends on the accuracy of the sensor. At a sampling frequency of 1 MHz, the maximum accuracy is reached in 17.5 sec. and is equal to 0.015% of full scale (FS). On the other hand, when the measurement time interval is 0.1 sec. (the shortest measurement interval), the accuracy is equal to 0.1% of FS. Therefore, the proposed device can be used for both calibration and measurement purposes.
Keywords:temperature measurement / Pt-100 sensors / two-bit stochastic digital measurement / calibration
Source:24th IMEKO TC4 International Symposium, 22nd International Workshop on ADC and DAC Modelling and Testing : IMEKO TC-4 2020, Palermo, Italy, September 14-16, 2020, 2020
- International Measurement Confederation
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200175 (Institute of Technical Sciences of SASA, Belgrade) (RS-200175)