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Static characteristics of measurement system

Updated: Category: Education
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about brief idea on measurement


1. Static :The characteristics involved in the measurement of quantities that are either constant or slowly varying with time to define a set of criteria that gives meaningful description is called as static characteristics

2. The main static characteristics are:

Accuracy: it is defined as closeness with which an instrument reading approaches true value of quantity being measured.

Precision: it is measure of the degree of agreement within group of measurement.
This is ratio of the magnitude of output signal or response to input signals being measured.

It is degree of closeness with which a given value may be repeatedly measured.

It is undesirable quality in industrial instruments as it is rarely apparent & cannot be easily compensated for

Static errors:
It is defined as difference between the measured value & true value of the quantity

Dead zone:
It is defined as the largest change of input quantity for which there is no output of instrument

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