PC based data acquisition system for resistivity13; and TEP studies at high pressures

Shubha, V and Ramesh, TG (1994) PC based data acquisition system for resistivity13; and TEP studies at high pressures. In: Proceeding of the National Conference on High Pressure Science and Technology, 10-11 Oct 1994, Bangalore, India.

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    In this paper we describe the development of a PC based data acquisition system for high resolution measurement of resistivity and absolute thermopower (TEP) of conducting solids at high pressures. The main feature of this sys-13; tem is the software PID control of temperature with stabilities of the order of f 0.02xB0;C in the truly hydrostatic teflon thermopower cell (temperature range13; O-3W0C) and f 0.loC in the quasi-hydrostatic high pressure -high temperature ceIl(temperature range O-lOOOxB0;C). A significant increase in the signal to noise ratio has been achieved by adopting real time digital filtering of the data.Linear rate of heating of the sample which is software selectable makes this system useful for other studies such as high pressure DTA.

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: Acquisition system;Thermopower cell;Resistivity; Quasi-hydrostatic high pressure
    Subjects: PHYSICS > Physics(General)
    Division/Department: Materials Science Division, Materials Science Division
    Depositing User: M/S ICAST NAL
    Date Deposited: 22 Jul 2008
    Last Modified: 17 Jun 2010 13:56
    URI: http://nal-ir.nal.res.in/id/eprint/4905

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