ERRORS


Errors in Measurement :

Error = Measured Value – True Value

E= V– Vt

1. Absolute Error :

01-errors in measurement-absolute error-greater accuracy and precision


            True absolute error :

= Result of measurement – True Value

            Apparent Absolute error :

= Result of measurement – Arithmetic Value

2. 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.

01-relative error-percentage relative error-absolute error

Causes of Errors :

1. Calibration Error:

These are caused due to the variation in the calibrated scale from it’s normal value.

01-error-calibration test-calibration of gauges-calibrate a instrument by a standard gauge-Panametrics-NDT_Calibration_Test_Blocks

2. Environmental Error :

These are caused due to humidity condition,Temperature and altitude.

3. Assembly Error:

i. Displaced Scale (incorrect Fitting)

ii. Non –uniform division of the scale.

iii. Due to bent /distorted pointer.

01-parallex error-eye fault defect by human-bias error

4. Random Error:

Naturally Occurred

No specific reasons

5. Systematic errors (or) Bias errors:

These are caused due to repeated readings.

01-errors-types of error-systematic error-random error-bias error

6. Chaotic errors :

These are caused due to vibrations,noises and shocks.

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6 Comments on “ERRORS”


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