Page 85 - CITS - Electronic Mechanic - TT - 2024
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ELECTRONICS MECHANIC - CITS




           Range : The transducer can give good result within its specified range, so select transducer as per the operating
           range.
           Sensitivity : The transducer should be more sensitive to produce the output or sensitivity should be as per
           requirement.
           Environmental compatibility : The transducer should maintain input and output characteristic for the selected
           environmental condition.
           Loading effect: The transducer’s input impedance should be high and output impedance should be low to avoid
           loading effect.
           Errors : The error produced by the transducer should be low as possible

















           Transducer Characteristics
           The characteristics of the transducer are given below that are determined by examining the output response of
           a transducer to a variety of input signals. The method of computational and standard statistical can be applied to
           the test data.
           1  Accuracy: It is defined as the closeness which the reading approaches an accepted standard value or ideal
              value or true value, of the variable being measured.
           2  Noise: All transducers have some random noise in their output. So the small signals are largely affected by
              noise in comparison to larger signals.
           3  Linearity: The output of the transducer should be linearity proportional to the input quantity under measurement.
              It should have linear input-output characteristics.
           4  Sensitivity: The  electrical  transducer  is  defined  as  the  electrical  output  obtained  per  unit  in  the  physical
              parameter of the input quantity called sensitivity of the transducer.
           5  Hysteresis: This property wherein a transducer output is dependent not only on the present input but also on
              the previous inputs.
           6  Size: The transducer should have the smallest possible size and shape with minimal weight and volume. This
              will make the measurement system very compact.
           7  Repeatability: A transducer ability to produce identical output upon stimulation by the same input in termed
              as repeatability.
           8  Speed: It is rapidity with which the transducer responds to changes in the measured quantity. The speed of
              the response of the transducer should be as high as practicable.
           9  Ruggedness: The transducer should be mechanically rugged to withstand overloads. it should have overload
              protection.
           10 High output: The Transducer should give reasonably high output signal so that it can be easily processed
              and measured. The output must be much larger than noise. Nowadays digital output is preferred in many
              applications.
           11 Dynamic range: For a transducer, the operating range should be wide so that it can be used over a wide
              range of measurement conditions.
           Sensor & IOT
           A sensor is a device that detects the change in the environment and responds to some output on the other
           system. A sensor converts a physical phenomenon into a measurable analog voltage (or sometimes a digital
           signal) converted into a human-readable display or transmitted for reading or further processing.


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                                    CITS : E & H - Electronics Mechanic - Lesson 43 - 47
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