title: Peristaltic pump-based low range pressure sensor calibration system.
abstract: Peristaltic pumps were normally used to pump liquids in several chemical and biological applications. In the present study, a peristaltic pump was used to pressurize the chamber (positive as well negative pressures) using atmospheric air. In the present paper, we discuss the development and performance study of an automatic pressurization system to calibrate low range (millibar) pressure sensors. The system includes a peristaltic pump, calibrated pressure sensor (master sensor), pressure chamber, and the control electronics. An in-house developed peristaltic pump was used to pressurize the chamber. A closed loop control system has been developed to detect and adjust the pressure leaks in the chamber. The complete system has been integrated into a portable product. The system performance has been studied for a step response and steady state errors. The system is portable, free from oil contaminants, and consumes less power compared to existing pressure calibration systems. The veracity of the system was verified by calibrating an unknown diaphragm based pressure sensor and the results obtained were satisfactory.
authors.affiliation: Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 5600012, India.
authors.forename: K B
authors.initials: KB
authors.lastname: Vinayakumar
authors.affiliation: Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 5600012, India.
authors.forename: G
authors.initials: G
authors.lastname: Naveen Kumar
authors.affiliation: Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 5600012, India.
authors.forename: M M
authors.initials: MM
authors.lastname: Nayak
authors.affiliation: Department of Electronic Systems Engineering, Indian Institute of Science, Bangalore 5600012, India.
authors.forename: N S
authors.initials: NS
authors.lastname: Dinesh
authors.affiliation: Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 5600012, India.
authors.forename: K
authors.initials: K
authors.lastname: Rajanna