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Peristaltic pump-based low range pressure sensor calibration system.

K B Vinayakumar1, G Naveen Kumar1, M M Nayak2

  • 1Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 5600012, India.

The Review of Scientific Instruments
|December 3, 2015
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This study developed an automatic system using a peristaltic pump for calibrating low-range pressure sensors. The portable, low-power system accurately adjusts and maintains pressure, offering a reliable alternative for sensor calibration.

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Area of Science:

  • Instrumentation and Measurement
  • Mechanical Engineering
  • Chemical Engineering

Background:

  • Peristaltic pumps are commonly used for liquid handling in chemical and biological applications.
  • Accurate calibration of low-range pressure sensors is crucial for various industrial and scientific applications.

Purpose of the Study:

  • To develop and evaluate an automatic pressurization system for calibrating millibar-range pressure sensors.
  • To utilize an in-house developed peristaltic pump for generating positive and negative pressures.

Main Methods:

  • Development of an automatic pressurization system incorporating a peristaltic pump, master pressure sensor, and control electronics.
  • Implementation of a closed-loop control system to manage pressure leaks within the calibration chamber.
  • Performance evaluation through step response and steady-state error analysis.

Main Results:

  • The developed system demonstrated portability, low power consumption, and freedom from oil contamination.
  • The system effectively generated and controlled both positive and negative pressures within the millibar range.
  • Satisfactory calibration results were achieved when testing an unknown diaphragm-based pressure sensor.

Conclusions:

  • The automatic peristaltic pump-based system provides a viable, efficient, and portable solution for low-range pressure sensor calibration.
  • The system's closed-loop control ensures accurate pressure adjustments and leak compensation.
  • This technology offers advantages over existing pressure calibration systems in terms of power consumption and contamination.