Mesurement Standards & Uncertainity

Standards developed for laboratories and workshops are derivate from fundamental standards.

• Primary Standards

• Secondary Standards

• Tertiary Standards

• Working Standards

The advantages of this are: accuracy in performing manufacturing operations, reduce inspection, an ensure quality products by reducing errors in measurement.

• Primary Standards

• Secondary Standards

• Calibration

• Status of Calibration

These are made in the instruments, if possible, to minimize the error in the reading indicated by the instrument.

• · Cleaning the instrument

• · Determination of error

• · Minor Changes

• · Next calibration date

This step is to determine the error in the instrument by various methods.

• · Cleaning the instrument

• · Determination of error

• · Next calibration date

• · Minor Changes

It is an expression of the fact for a given result of measurement there is not one value but infinite number of values dispersed about the result with varying degree of credibility.

• Uncertainty

• Reporting Result

• Executive Summary

• Progress Report

The report highlight only the key features of the work such as what was done and what was conclude

• · Uncertainty

• · Reporting Result

• · Executive Summary

• · Progress Report

It is just that one of possibly several interim reports describing the current status of an ongoing project, which will eventually incorporated in a fully report.

• · Uncertainty

• · Reporting Result

• · Executive Summary

• · Progress Report

A measure of consistency or repeatability of measurement.

• Precision

• Resolution

• Sensitivity

• Error

It is a maximum allowable error in the measurement

• · Tolerance

• · Linearity

• · True Value

• · Stability

It is the largest range of values of measured variable to which the instrument do not respond

• · Dead Zone

• · Reproducibility

• · Tolerance

• · Drift