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It can be generalized that no electronic component or instrument is perfectly accurate; all have some error and inaccuracy.
It is very difficult to define the true value. There is always some different, either small or large, between the measured value and the true value of the unknown quantity.
Error may be expressed either as absolute or percentage of error:
Absolute error, e = | ππ β ππ |
% πππππ = | (ππ β ππ)/ ππ | Γ 100
Where- ππ: expected value; ππ: measured value
Relative accuracy
> Relative accuracy, A = 1 - | Yn- Xn / Yn |
%Accuracy, a = 100% - % Error = A x 100
Precision
> Precision, P= 1 β | Xn β Μxn / Μxn |
where;
Xn: value of the nth measurement
Μxn : average set of measurement
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