Static Sensitivity of measurements | Definition | Example | Explanation
Static Sensitivity of measurements | Definition | Example | Explanation
Definition of Sensitivity :
Sensitivity of an instrument is defined as the ratio of its magnitude of the response and the magnitude of thequantity being measured.
Explanation of Sensitivity Curve:
1)Sensitivity is represnted by the slope of the calibration curve.
2) With a linear calibration curve, the sensitivity is constant.
3) If calibration curve is non-linear then static sensitivity is not constant and must be specified in terms of the input value.
For example of Sensitivity :
The operation of a resistance thermometer depends upon a change in resistance (output) to change in temperature (Input) and. as such its sensitivity will have units of ohm/° C.
― Sensitivity of an instrunLent system is usually required to be as high as possible because then it becomes easier
to take the measurement.
― Let the dififerent elements comprising a measurement systemhave static sensitivities of K1, K2, KS, K4... Etc.
―When these elements-are connected in series or cascadthen the overall sensitivity is worked out from the following relations.
― The above relation is based upon the assumption that on variation occurs in the values of individual sensitivities K1 K2 K3 K4... Etc. Due to loading effects.
― When the input to and output from the measurement system used with electronic equipment have the same. Forms, the term gain is used rather than sensitivity.
― Likewise an increase in displacement with the optical and mechanical instrument is described by the term amplification.
― Further when the input or outputs signal is changing with time, the term transfer function or transfer operator is used rather
than sensitivity, gain or amplification
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