| dc.description.abstract | A microprocessor-based system for automating the Therma 1
Absorption Calorimeter has been developed. The system is
based on the Z-80 microprocessor and runs at a speed of
2MHz.
It features an in-built Read Only Memory (ROM) for storing
the monitor program and a Random Access Memory (RAM) for
storing the captured data. The system is successfully
interfaced to the Calorimeter, controlling the opening and
closing of the shutter window and sampling data from four
different material plate.
Sample plates of steel, copper, aluminium and brass
materials, both paint-coated and uncoated are prepared and
data of the variation of temperature with time of the
plate sampled using the system. The sampled data is
uploaded to a fully developed system using a data upload
port developed to support communication between the system
and a microcomputer via an In-Circuit-Emulator.
The data is subjected to calibration equations using a
Micro-soft MSWORKS software. The temperature/time
distribution curves are obtained, from which the thermal
absorption coefficients of the black coating material on
the sample plates are derived. | en |
