IN AIRCRAFT TESTING, it has been difficult to accurately determine small differential temperatures in mediums such as engine oils and aircraft fuels which may vary in temperature over several hundred degrees. A method of measuring this temperature with an electronic circuit utilising platinum probes is presented which is capable of measuring temperature differentials as low as 2.5°C. This method utilises two platinum element probes connected in series driven by a constant current generator. An electronic circuit holds the mid-point of the probes at virtual ground minimising common mode voltages across the probes. A differential amplifier provides an output proportional to the differential temperature. The mis-matching and non-linearity of the platinum sensors is compensated. Voltage sensed across one probe provides an output proportional to the temperature of the medium.


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    Title :

    Differential temperature measurements in engine fluids


    Contributors:


    Publication date :

    1973-06-01


    Size :

    3 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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