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What is Metrology? Metrology is the science of measurement. It includes units of measurement and their standards, measuring instruments and their field of application, and all theoretical and practical aspects relating to measurement. What does it mean to take a measurement? It means that for a physical quantity we assign a certain number followed by the unit. The number expresses the ratio of the measured quantity to a certain standard and the unit is the name for the standard. Over the years, human beings have used many systems of units and many standards for physical and chemical measurements. Is there a difference between metrology and meteorology? Yes, there is. What is the difference between metrology and meteorology? Metrology is the science of measurement. Meteorology is the science of the atmosphere. What standards of measurement should you know in 2012? Customary measurements Metric measurements (the metric system has evolved from the International System of Units) FPS are linked to customary system. CGS and MKS are linked to the metric system. FPS, CGS, and MKS were in use before 1960. You should know customary and metric system of measurement. What do you understand by base units of measurement? A set of fundamental units for physical quantities from which every other unit can be generated. What are examples of base units of measurement? Length, mass, time, electrical current, thermodynamic temperature, luminous intensity, amount of substance. What is a derived unit of measurement? A unit of measurement that is determined by combining two or more measurements. What are examples of derived units of measurement? There are more than 75 derived units of measurement. What are the methods of measurement? 1. Direct comparison 2. Indirect comparison 3. Comparative method 4. Coincidence method 5. Fundamental method 6. Contact method 7. Transposition method 8. Complementary method 9. Deflection method 10. Others. What are various instruments of measurement? There are hundreds of instruments of measurement. Questions you need to answer What standard of measurement do you follow? Where is that standard displayed publicly? Do you follow the customary or metric system of measurement, or both? |
| Alphabetical Listing |
| Analogue and Digital Systems |
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Astronomical Unit http://www.qrg.northwestern.edu/projects/vss/docs/Navigation/subzoom-nav.html |
| Base units |
| Class Vocabulary |
| Derived units and dimensions |
| Digital Metrology |
| Electrical measurements |
| Electronics |
| Engineers |
| General Analytical Metrology |
| History of measurement |
| List of materials properties |
| List of electronics topics |
| Methods of Measurements |
| Measuring instruments |
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Measurement Conversion |
| Measurement Practice Questions |
| Mechatronics |
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Measurement Systems
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| Physics multiple choice(Measurement and State of matter) |
| Useful links |
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Units and their ranges in Chemistry
http://www.chem1.com/acad/webtext/pre/mm1.html |
| Metrology is classified in three main fields: |
| Is there a difference between “the metric system” and SI? |
| Tools required for electronics |
| Terms in Engineering Measurements |
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What is distance? How many square feet in a square meter? What was the volume (in cubic centimeters) for this large block of steel? What was the mass in grams for the large block? What is the density of the steel used in this project? |