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Abstract
This paper describes the development of a total automation and cheap data acquisition system for a high temperature Calvet calorimeter or an isoperibolic calorimeter with a Commodore 3032 microcomputer. The system has been developed successfully to drive a two-phase stepper motor, to provide programmed control of a 181 Keithley nanovoltmeter and to calculate the total heat effect. The calorimetric precision for dissolution of 3 d transition metals in liquid aluminium at 1000 K is about +0.1%.
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