system can be defined as a black box which is used for makingmeasurements. It
has the input as the quantity being measured and the output as a
measured value of that quantity.
Elements of Measurement Systems:
system consists of the following three elements.
a) Sensor b) Signal
conditioner c) Display
A sensor consists of transducer
whose function is to convert the one form of energy into electrical form of
energy. A sensor is a sensing element of measurement system that converts the
input quantity being measured into an output signal which is related to the
Sensor – Thermocouple
Output – E.M.F
A signal conditioner receives
signal from the sensor and manipulates it into a suitable condition for
display. The signal conditioner performs filtering, amplification or other
signal conditioning on the sensor output.
measurement – Single
Conditioner function (Amplifier)
Input – Small
E.M.F value (From sensor)
Output – Big
E.M.F Value (Amplified).
system displays the data (output) from the signal conditioner by analog or
digital. A digital system is a temporary store such as recorder.
L.E.D (or) Number
on scale by
Input – Conditioned Signal (from signal conditioner)
Output – Value of the quantity (Temperature)