CIRCUIT DE COMMANDE D'UN ANALYSEUR THERMOMETRIQUE POUR EFFECTUER UNE MESURE INDEPENDANTE DE LA TEMPERATURE DE L'ENVIRONNEMENT, DE SOLUTIONS DE REACTIFS, D'UNE SOLUTION A CONTROLER ET DE SA CAPACITE CALORIFIQUE

摘要

The invention relates to a circuit arrangement for measuring temperature differences or temperature variations, which contains temperature measuring units (2), a differential current circuit (3), a memory unit (4) and a display unit (9), and a sensor (1) is fed to a comparator (7) via one of the temperature measuring units (2) and the differential current circuit (3), the memory unit (4) and an arithmetic unit (5), which is also connected to a transmitter unit (6), the comparator (7) being fed to a process control unit (8); an output of the differential current circuit (3) is connected to the comparator (7), and the common point of the temperature measuring unit (2) and of the differential current circuit (3) is connected to a subtracting unit (12) and thus to the arithmetic unit (5), the subtracting unit being connected to a temperature measuring unit of another measuring head. The circuit arrangement according to the invention enables the measurement of reaction heat, and of the composition etc. of various liquids, and ensures measurement results that are independent of ambient temperature and of the temperature and thermal capacity of the liquids applied. <IMAGE>