Subject code: me6504 Subject name

Loading Error: 
results from the change of the measurement instrument when it is being used.
Effect of support.
Dirt.

---

ME6504 Metrology and Measurements
Dept. of Mechanical Engg., VTHT.
9
Errors in Measurement
Measurements Errors
Other Sources of Errors

Errors due to Vibrations.

Metallurgical Effects.

Contact Point Penetration.

Errors due to Deflection.

Errors due to Looseness.

Errors due to Wear in Gauges.

Errors due to Location.

Errors due to Poor Contact.

Errors due to Impression of Measuring Stylus.

---

ME6504 Metrology and Measurements
Dept. of Mechanical Engg., VTHT.
10
Errors in Measurement
Accuracy and Precision
Accuracy
is the agreement between a 
measured value and the true value. 
Precision
also called reproducibility or 
repeatability, the degree to which 
further measurements or calculations 
show the same or similar results.
•
Instrument precision
is usually associated with the number of digits
displayed on the output, i.e., its
resolution
.
•
Accuracy indicates proximity to the true value, precision to the
repeatability or reproducibility of the measurement.

---

ME6504 Metrology and Measurements
Dept. of Mechanical Engg., VTHT.
11