Introduction
Measurement of temperature is an important task in a large number of physical processes. A transducer in a device which converts the temperature information into an electrical signal, usually voltage, for an automated processing. A very wide variety of temperature transducers are commonly available which differ from each other with regards to there:
a) Range of operation
b) Sensitivity and linearity
c) Accuracy, Stability and Repeatability
d) Speed of response
The present experiments has been designed to study the input-output characteristics of some common transducers like, thermistors (PTC and NTC), thermocouple, semiconductor sensors and may be extended to also study the temperature coefficients of resistances.
The main requirements for an experiment of this nature are,
a) A precisely controlled from oven with a temperature display which is fast
b) An adjustable gain instrumentation amplifier which may be used to amplify the different levels of signals from transducers
c) Interfacing circuits suitable for the transducers used
Experiments
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