Errors in Measurement :
Error = Measured Value – True Value
Em = Vm – Vt
- Absolute Error :
True absolute error :
= Result of measurement – True Value
Apparent Absolute error :
= Result of measurement – Arithmetic Value
- Relative error :
It is defined as the results of the absolute error and the value of comparison used for 450
calculation of that absolute error.
Causes of Errors :
- Calibration Error:
These are caused due to the variation in the calibrated scale from it’s normal value.
- Environmental Error :
These are caused due to humidity condition,Temperature and altitude.
- Assembly Error:
i. Displaced Scale (incorrect Fitting)
ii. Non –uniform division of the scale.
iii. Due to bent /distorted pointer.
- Random Error:
Naturally Occurred
No specific reasons
- Systematic errors (or) Bias errors:
These are caused due to repeated readings.
- Chaotic errors :
These are caused due to vibrations,noises and shocks.
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