Development of educational model of power compensated differential scanning calorimeter (PC-DSC)
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ORIGINAL RESEARCH
Development of educational model of power compensated differential scanning calorimeter (PC-DSC) R. Parthasarathy1 • E. Prabhu2 • K. Venkatramanan3
•
T. Gnanasekaran1
Received: 30 October 2020 / Accepted: 11 November 2020 Ó CSI Publications 2020
Abstract We have developed an educational model of power compensated differential scanning calorimeter with a few modifications for the science students of academic institutions. In order to demonstrate the instrumentation and analytical aspects involved in the system, all the building blocks are constructed using local industry and are explained in detail. A few deviations from the conventional model have been attempted without compromising the basic calorimetric concept. This is done with a due consideration for cost factor and also to keep the openness in the development. The paper discusses the calibration procedure of the modified system to arrive at the on-set temperature and enthalpy of the samples. We are able to measure the onset temperature within ±1.18 °C and the enthalpy values using this proto version with an error 5%. Keywords Calorimetry Enthalpy Platinum heater RTD VFC based ADC
1 Introduction Today, it has become increasingly important to incorporate modern analytical techniques and instrumentation into curriculum of the science students to provide more handson learning environment. Differential scanning & K. Venkatramanan [email protected] 1
SJCAR, SCSVMV Deemed University, Kanchipuram, India
2
Materials and Metal Fuel Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
3
Department of Physics, SCSVMV Deemed University, Kanchipuram, India
calorimeters (DSC) are rugged, easy to use instrumental method for studying the phase and structural changes and for measuring the temperature and enthalpy changes in these processes. The market cost of the commercial instrument of such DSCs is around Rs. 50 lakhs. These instruments generally are built around proprietary sensors, hybrid hardware electronics, embedded software and packaging. A lot of sophistication and proprietary features are incorporated into the system for the sake of ease of operation and also for protecting their intellectual copyright. But because of very nature of these features, the corrective maintenance of such instruments also become very expensive and beyond a certain period of time, it is not possible. So these instruments are mainly addressed to research institutes and industries. The huge cost and greater proprietary would prevent the use of such instruments in academic institutions, for regular teaching and learning purposes with hands-on experiments. Keeping in-line with the mission to develop low cost educational model of analytical instruments, the research centre [SJCAR] of Sri Chandrasekharendra Saraswathi Viswa Maha Vidyalaya, (SCSVMV, Kanchipuram), has successfully demonstrated the development of the power compensated differential scanning calorimeter (PC-DSC) instrument and heat flux differential scanning calorimeter (H
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