The indicated value
is the value obtained with and displayed by the
measuring instrument; it reflects the instrument’s inherent losses and
inaccuracies. Indicated values always contain errors when compared to
true or effective values. They also vary intrinsically from one
measurement to another; their differences depend on a multitude of
considerations. Comparing how closely an indicated value agrees with
the effective value under a defined set of measurement conditions lets
you judge the measurement’s quality (Figure-8).
Figure- 8. Indicated value
The effective value is what we want to know, and the goal of
measurement is to have the indicated value to be as close as possible
to the effective value.
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