<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The use of the thermostatic metal bath is becoming more and more extensive and the requirements for its precision and reliability are also increasing. To meet the needs of the metal bath calibration, a 12-channel thermostatic metal bath temperature field calibration system based on a four-wire PT100 has been designed. The system design includes a front-end temperature measurement component, which consists of a four-wire PT100 and a thermostatic block, and a signal processing component, which consists of a bidirectional constant current source excitation unit, a signal conditioning unit and a high-precision acquisition unit. The STM32f407 is used as the main control chip, and the analog channel selector is used for 12-channel selection. The constant current source is used for signal excitation, the proportional method is used to measure the PT100 resistance, and an acquisition circuit with a high-precision 32-bit ADS1263 analog-to-digital converter is used to amplify, filter and convert the analog signal. After piecewise linear fitting and system calibration, the temperature measurement accuracy can reach 0.4 mK, which meets the calibration requirements of the thermostatic metal bath.</p>
</abstract>

The use of the thermostatic metal bath is becoming more and more extensive and the requirements for its precision and reliability are also increasing. To meet the needs of the metal bath calibration, a 12-channel thermostatic metal bath temperature field calibration system based on a four-wire PT100 has been designed. The system design includes a front-end temperature measurement component, which consists of a four-wire PT100 and a thermostatic block, and a signal processing component, which consists of a bidirectional constant current source excitation unit, a signal conditioning unit and a high-precision acquisition unit. The STM32f407 is used as the main control chip, and the analog channel selector is used for 12-channel selection. The constant current source is used for signal excitation, the proportional method is used to measure the PT100 resistance, and an acquisition circuit with a high-precision 32-bit ADS1263 analog-to-digital converter is used to amplify, filter and convert the analog signal. After piecewise linear fitting and system calibration, the temperature measurement accuracy can reach 0.4 mK, which meets the calibration requirements of the thermostatic metal bath.

Design of Calibration System for Multi-Channel Thermostatic Metal Bath

Instrument Science and Technology, Department of Automation

Nanjing University of Aeronautics and Astronautics

Xinjiang University, Xinjiang University Boduo Campus

University of Chinese Academy of Sciences

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Design of Calibration System for Multi-Channel Thermostatic Metal Bath"}

The use of the thermostatic metal bath is becoming more and more extensive and the requirements for its precision and reliability are also increasing. To meet...

Design of Calibration System for Multi-Channel Thermostatic Metal Bath

Online veröffentlicht: 07. März 2024

Seitenbereich: 27 - 35

Eingereicht: 28. Aug. 2023

Akzeptiert: 08. Jan. 2024

DOI: https://doi.org/10.2478/msr-2024-0004

Schlüsselwörter
thermostatic metal bath, high-precision temperature measurement, PT100, multi-channel temperature measurement

© 2024 Hua Zhuo et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Design of Calibration System for Multi-Channel Thermostatic Metal Bath

Online veröffentlicht: 07. März 2024

Seitenbereich: 27 - 35

Eingereicht: 28. Aug. 2023

Akzeptiert: 08. Jan. 2024

DOI: https://doi.org/10.2478/msr-2024-0004

Schlüsselwörterthermostatic metal bath, high-precision temperature measurement, PT100, multi-channel temperature measurement

© 2024 Hua Zhuo et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Schlüsselwörter
thermostatic metal bath, high-precision temperature measurement, PT100, multi-channel temperature measurement