All other science fields. “Metrology” is the science of measurement related to measurement systems and units.
The main purpose of Metrology is to base all measurements on independent units. For this purpose, the system adopted for all scientific studies; It is the International System of Units (SI) based on seven basic units: “Meter, Kilogram, Second, Ampere, Kelvin, Mole and Candela”. The function of Metrology Laboratories is to realize these basic units and units derived from them in a way that can be used as a reference for measurements in every field and can be used practically easily.
Metrology creates the infrastructure of the measurement, standardization, control and quality system in a Country, ensuring the formation of a comprehensive system for the determination of product features and quality control for quality security.
Metrology Areas What is it?
“Legal Metrology”, another field of Metrology, includes Scientific and Technical conditions, as well as ensuring the accuracy and unit unity of measurements within the scope of Legal, Administrative and Organizational principles within the country.
Metrology; It has an important place in raising the standard of living of a country, protecting the environment and consumers, ensuring the safety of people, scientific and technical research and many other issues. It was accepted at the 11th (CGPM) “Conference on Measures and Weights”.
(SI) INTERNATIONAL SYSTEM OF UNITS
International System of Units (Systeme International d’Unites), accepted at the 11th (CGPM) “Conference on Measures and Weights” held in 1960
International System of Units; It was accepted by the members of the Countries included in the “International Meter Convention” with the development of the metric system after many centuries of confusion in the world’s unit systems.
International Units The System consists of Seven Basic Units and the derived and complementary units obtained from these units. Derived Units are obtained by multiplying or dividing the basic units.
Our Country (SI) has accepted the International System of Units as it is, and after the last changes, it was published in the Official Gazette dated 07 December 1990 and numbered 20718. has been published.
Basic Units used in the field of Legal Metrology in Türkiye are shown below.
(SI) INTERNATIONAL SYSTEM OF UNITS
| BASIC SIZES | BASIC UNITS | |
| NAME | SYMBOL[[[KOBSEP00000012 ]]]Length | |
| Length | Meters | m |
| K mass | Kilogram | kg |
| Increase moment | Second | s |
| Electricity Current | Ampere | A |
| Thermo-Dynamic Temperature | Kelvin | K |
| Material Amount | Mole | mole |
| Light Intensity | Candela | cd |
(SI) DEFINITION OF BASIC UNITS
Meter (m) :1 Meter is the length of the path traveled by light in vacuum in 1/299 792 458 s.
Kilogram (kg) :1 kilogram is equal to the mass of the International kilogram prototype.
Second (s) :1 second C s133 is the period of 9 192 631 770 periods of the radiation that occurs during the transition between two super-thin levels in the base energy of the atom.
Ampere (A) :1 Ampere is a negligible small section in space, 1 m away from each other. It is the intensity of the current that creates a force of 2.10
2.10 since it passes through two parallel linear conductors-7newtons as it passes through two parallel linear conductors.
Kelvin (K) :1 Kelvin is the thermodynamic temperature of the triple point of water at 273.16.
Mole : 1 Mole is equal to the amount of a system containing elements of matter structure equal to the number of atoms contained in 0.012 kilograms of the C12 element.
Candela (cd) : Candela, basic measurement of light intensity.
WHAT IS MEASUREMENT?
Measurement: A comparison, or the quantitative determination of a quantity.
FINDING THE MEASUREMENT VALUE
Every measuring instrument, G We can regard it as a converter that evaluates the measurement quantity quantitatively, that is, finds its numerical value (G) and gives the result in a way that can be used in many ways.
MEASURING ERROR (e)
(e) (Xö) with its measured value (Xd) is called.
This error is ………. e = PROTOTYPEö-Xd
UNIT OF MASS KILOGRAM
The unit of mass is kilogram and is defined as the mass of the International Kilogram Prototype in BIPM.
INTERNATIONAL KILOGRAM PROTOTYPE
Diameter :39 mm
Height :39 mm
Composition : 90% Platinum, 10% Iridium
Density It is a cylinder with a mass of 21.5 g/cm3.
All Member States of the Meter Convention have been given a copy of the International kilogram prototype, called the National Prototype.
Unlike other known units, the kilogram is not defined in relation to any of the physical constants and is an object whose mass is considered constant.
The expected conclusion here is that the mass unit will never be transmitted more accurately in BIPM than the comparisons made with the International Prototype.
The Number of the National Kilogram Prototype belonging to Türkiye is 54.