Engineering Metrology Intro – Selection of Instruments
Posted by mechlook info on August 9th, 2011 11:53 PM | No Comment
The important characteristics to be considered in selection of an instrument are its measuring range, accuracy and precision. Usually accuracy is poor at the lower end of scale which should be avoided. In such a situation, where accurate measurement is ...
Engineering Metrology Intro – Measuring Instruments
Posted by mechlook info on August 9th, 2011 11:52 PM | No Comment
Measuring Instruments are measuring devices that transform the measured quantity or a related quantity into an indication or information.
Measuring instruments can either indicate directly the value of the measured quantity or only indicate its equality to a known measure of ...
Engineering Metrology Intro – Physical Measurements
Posted by mechlook info on August 9th, 2011 10:57 PM | No Comment
A physical measurement could be defined as the act of deriving quantitative iuformation about a physical object or action by ccmpariscn with a reference. It will be noted from this definition that there are three important elements of a measurement, ...
Engineering Metrology Intro – Need of Inspection
Posted by mechlook info on August 9th, 2011 10:47 PM | No Comment
In order to determine the fitness of anything made, man has always used inspection. But industrial inspection is of recent origin and-has scientific approach behind it. It came into being because of mass production which involved interchangeability of parts. In ...
Engineering Metrology Introduction
Posted by mechlook info on August 9th, 2011 10:26 PM | No Comment
l'l. What is Metrology
It is well-known saying that the knowledge about anything is complete only when it can be expressed in numbers and something is known about it. Thus for every kind of quantity measured, there must be a unit ...