When 2503 (1960) International Organization for Standardization (ISO) has defined a scientific and technology measurement system, the same system worldwide. Also known as the international unit and the unit of measurement in the SI system of units, this
. SI unit system Foundation is used to measure the base quantity unit 7:
m (Meter: m) is the unit used to measure the length
kilograms (kilogramme: kg) is the unit used to measure the mass
seconds (Second: s) is the unit used to measure time
ampere, (Ampere: A) is the unit used to measure electricity
. Kelvin (Kelvin: K) is a unit used to measure heat
. La khaende (cd: Candela) is the unit used to measure the intensity of the lighting
. MOL (Mole: mol) is the unit used to measure the quantity of the substance
.In addition, there is a standard unit of measure. The tools used to measure, it is very important as well. That is, it must be a standard measuring instruments. The values measured at all times there must be precision. The value of those measures, it is just an estimate obtained from the appropriate measures only.
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