Authors : Chukwuemeka, S. N.; Jinanwa, E. A.; Anigbogu, C.C.

Volume/Issue : Volume 11 - 2026, Issue 6 - June

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Google Scholar : https://tinyurl.com/5u5af79c

Scribd : https://tinyurl.com/bdzk4ks7

DOI : https://doi.org/10.38124/ijisrt/26jun996

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Abstract : Accurate instrumentation is essential for maintaining efficient and reliable industrial process control. However, the performance of transmitters and valve positioners can deteriorate over time due to wear, environmental influences, and signal drift. This study evaluates the effect of calibration on the accuracy of industrial transmitters and the operational reliability of valve positioners. Calibration was performed using traceable reference standards, and instrument performance was assessed based on measurement error, repeatability, linearity, hysteresis, and valve positioning accuracy.

Keywords : Calibration, Transmitters, Valve Positioners, Process Control, Measurement Accuracy, Industrial Systems, Automation.

References :

1. ANSI/ISA. (2024). Test Procedure for Control Valve Response Measurement from Step Inputs (ISA 75.25.01-2024). International Society of Automation.
2. Bolton, William. (2021). Instrumentation and control systems (3rd ed.). Newnes.
3. Bequette, B. Wayne. (2020). Process control: Modeling, design, and simulation (2nd ed.). Prentice Hall.
4. Fraden, Jacob. (2016). Handbook of modern sensors: Physics, designs, and applications (5th ed.). Springer.
5. IEC. (2024). Industrial-process measurement and control standards for calibration and instrumentation systems. International Electrotechnical Commission.
6. IEC. (2024). IEC 62522: Calibration of tunable laser sources. International Electrotechnical Commission.
7. ISA. (2024). Instrumentation calibration and maintenance practices in process control systems. International Society of Automation.
8. International Society of Automation. (2024). Calibration: Instrument calibration principles and applications. ISA Publications.
9. International Organization for Standardization. (2017). ISO 10012: Measurement management systems—Requirements for measurement processes and measuring equipment. ISO.
10. International Organization for Standardization. (2018). ISO/IEC 17025: General requirements for the competence of testing and calibration laboratories. ISO.
11. MDPI Sensors. (2024). Pressure sensor calibration and measurement accuracy studies. Sensors Journal, 24(2), 629.
12. National Institute of Standards and Technology. (2023). Guidelines for evaluating and expressing measurement uncertainty. NIST.
13. Seborg, Dale E.., Edgar, Thomas F.., Mellichamp, Duncan A.., & Doyle, Francis J.. (2017). Process dynamics and control (4th ed.). Wiley.