Chapter 14. Digital Modernization of Thermoanalytical Instrumentation
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1989 The American Ceramic Society, Inc.
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
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1989
Print ISBN: 9780470374832
Online ISBN: 9780470310526
- thermoanalytical instrumentation;
- monochrome monitor;
- heat leakage;
- data storage
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.