Correct Answer - Option 1 : Error
Error: The deviation of the measured value from the true value (or) actual value is called error.
Error (E) = Am – At
Am = Measured value
At = True value
This is also called as the Absolute Error.
Important:
Relative Static Error: The ratio of absolute error to the true value is called relative static error.
\(R.S.E = \frac{{\left| {{A_m} - {A_t}} \right|}}{{{A_t}}} \times 100\)
Limiting Error: The maximum allowable error in the measurement is specified in terms of true value, is known as limiting error. It will give a range of errors. It is always with respect to true value, so it is a variable error.
Guaranteed Accuracy Error: The allowable error in measurement is specified in terms of full-scale value is known as a guaranteed accuracy error. It is a variable error seen by the instrument since it is with respect to full-scale value.
