Standard (metrology)

The International Prototype Kilogram (IPK) is an artifact standard or prototype that is defined to be exactly one kilogram mass.

A set of gauge blocks are used as a working standard to check the calibration of measurement tools such as micrometers.

In metrology (the science of measurement), a standard (or etalon) is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity. Standards are the fundamental reference for a system of weights and measures, against which all other measuring devices are compared. Historical standards for length, volume, and mass were defined by many different authorities, which resulted in confusion and inaccuracy of measurements. Modern measurements are defined in relationship to internationally-standardized reference objects, which are used under carefully controlled laboratory conditions to define the units of length, mass, electrical potential, and other physical quantities.

单词	International reference standard
释义	International reference standard 英语百科 Standard (metrology) In metrology (the science of measurement), a standard (or etalon) is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity. Standards are the fundamental reference for a system of weights and measures, against which all other measuring devices are compared. Historical standards for length, volume, and mass were defined by many different authorities, which resulted in confusion and inaccuracy of measurements. Modern measurements are defined in relationship to internationally-standardized reference objects, which are used under carefully controlled laboratory conditions to define the units of length, mass, electrical potential, and other physical quantities.
随便看	primary derivative的意思 primary dermal leishmaniasis的意思 primary desiccation syndrome的意思 primary design的意思 primary design criteria的意思 primary design stage的意思 primary design variable的意思 primary desperrsion的意思 primary detachment的意思 primary detachment of choroid的意思 primary detachment of retina的意思 primary detecting element的意思 primary detector的意思 primary deuteron的意思 Primary deviance的意思 primary deviation的意思 primary device的意思 primary diabetes mellitus的意思 primary diagnosis的意思 primary dictionary的意思 primary dietary deficiency的意思 primary difference的意思 Primary diffuse atrophy的意思 primary diffuse interstitial pulmonary fibrosis的意思 primary digestion的意思

International reference standard

Standard (metrology)