Chapter 14. Digital Modernization of Thermoanalytical Instrumentation

  1. John B. Wachtman Jr.
  1. Robert F. Speyer

Published Online: 26 MAR 2008

DOI: 10.1002/9780470310526.ch14

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 10, Issue 1/2

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 10, Issue 1/2

How to Cite

Speyer, R. F. (1989) Digital Modernization of Thermoanalytical Instrumentation, in Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 10, Issue 1/2 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310526.ch14

Author Information

  1. New York State College of Ceramics at Alfred University Alfred, NY 14802 Innovative Thermal Systems, Inc. Almond, NY 14804

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780470374832

Online ISBN: 9780470310526

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Keywords:

  • thermoanalytical instrumentation;
  • monochrome monitor;
  • heat leakage;
  • thermocouple;
  • data storage

Summary

Differential Thermal Analyzers, Thermogravimetric Analyzers, and DUatometers were reconfigured, removing the mechanical furnace control and chart recorders in favor of a digital system. An appended PID control logic was written into personal computer software which, via a D/A converter and interfacing electronics, sent power instructions to the furnace power pack. Sample temperature as well as differential temperature, mass, or length changes were calculated and recorded from millivolt signals read from the instruments, using a 15 1/2 bit AID microprocessor. Collected data was manipulated and plotted using software written in house, including temperature location, peak area integration, continuous derivative, baseline tilt, glass transition temperature, non-linear regression data smoothing, and hardcopy generation.