Metrology - Introduction to metrology

Has to ensure the adequate function of measurement instruments used in industry as well as production and testing process.

• · Scientific Metrology

• · Industrial Metrology

• · Legal Metrology

• · Fundamental Metrology

It is concern with the accuracy of measurements where these have influence on the transparency of economical transactions, and health and safety.

• · Scientific Metrology

• · Industrial Metrology

• · Legal Metrology

• · Fundamental Metrology

It is necessary to check all material, products and component parts at various stages during manufacturing, assembly, packing and installation on customer´s environment.

• · Need of Inspection

• · Calibration

• · Precision

• · Industrial Metrology

It is the susceptibility of a measurement device to have its indicators converted into meaningful numbers.

• · Readability

• · Precision

• · Inspection

• · Error

It is the relationship between values of quantities indicated by a measuring instrument and the corresponding value realized by standards.

• · Calibration

• · Precision

• · Expectation

• · Range

It is the degree to which the measured value of the quality characteristics agrees with the true value.

• · Precision

• · Accuracy

• · Testing

• · Standardization

It is called fundamental method and it is based on the measurement of the base quantities used to define a particular quantity.

• · Absolute Method

• · Comparison Method

• · Substitution Method

• · Coincidence Method

The value of the quantity to be measure is obtained directly without any calculation.

• · Direct Method

• · Indirect Method

• · Absolute Method

• · Comparison Method

Select the factors that affects the accuracy of measuring instruments:

• · Environmental conditions

• · Calibration

• · Inspector

• Standardization

It is the result of incapability of the system to response reliably to time-varying measurement.

• · Dynamic Error

• · Static Error

• · Relative Error

• · Absolute Error