Sistem Besaran Internasional

Sistem Besaran Internasional (bahasa Inggris: International System of Quantities; ISQ) adalah suatu kelompok besaran dan persamaan yang berkaitan dengan sesuatu yang mendeskripsikan fisika dan alam, seperti yang digunakan dalam ilmu pengetahuan modern, yang disahkan oleh Organisasi Standardisasi Internasional (ISO) pada tahun 2009.^[1] Sistem ini mendasari Sistem Satuan Internasional (SI) yang menjadi lebih umum, di mana sistem tersebut tidak memerinci satuan ukur yang disarankan untuk setiap besaran. Istilah tersebut digunakan oleh Konferensi Umum untuk Ukuran dan Timbangan (CGPM) dan beberapa badan standardisasi seperti Organisasi Standardisasi Internasional (ISO) dan Komisi Elektronteknik Internasional (IEC) untuk merujuk pada sistem ini, khususnya yang mengacu pada sistem yang konsisten dengan SI. Standar ISO yang menjelaskan tentang ISQ, yang dikeluarkan pada tahun 2009, adalah ISO/IEC 80000, yang menggantikan standar sebelumnya ISO 31 dan ISO 1000 yang diterbitkan pada tahun 1992.

ISQ adalah sistem yang didefinisikan secara tidak lengkap.^[2]^[3] ISO dan IEC telah bekerja sama dalam merumuskan penggunaan dari bagian-bagian sistem tersebut dengan memberikan informasi dan definisi tentang besaran, sistem besaran, satuan, simbol besaran dan satuan, serta sistem satuan yang jelas, dengan referensi tertentu pada ISQ. Standar ISO/IEC 80000 mendefinisikan besaran fisika yang dinyatakan dengan satuan SI^[4] dan juga mencakup banyak besaran lainnya yang digunakan dalam ilmu pengetahuan dan teknologi modern.^[5]

^ ISO 80000-1:2009, The system of quantities, including the relations among them the quantities used as the basis of the units of the SI, is named the International System of Quantities, denoted 'ISQ', in all languages. [...] It should be realized, however, that ISQ is simply a convenient notation to assign to the essentially infinite and continually evolving and expanding system of quantities and equations on which all of modern science and technology rests. ISQ is a shorthand notation for the 'system of quantities on which the SI is based', which was the phrase used for this system in ISO 31.
^ The International System of Units (SI) (PDF) (edisi ke-8th), 2006, hlm. 104, diakses tanggal 2020-08-02, The system of quantities, including the equations relating the quantities, to be used with the SI, is in fact just the quantities and equations of physics that are familiar to all scientists, technologists, and engineers. They are listed in many textbooks and in many references, but any such list can only be a selection of the possible quantities and equations, which is without limit.
^ The International System of Units (PDF) (edisi ke-9th), BIPM, 2019, hlm. 125, diakses tanggal 2020-08-02, The system of quantities underlying the SI and the equations relating them are based on the present description of nature and are familiar to all scientists, technologists and engineers.
^ "1.16" (PDF). International vocabulary of metrology – Basic and general concepts and associated terms (VIM) (edisi ke-3rd). International Bureau of Weights and Measures (BIPM):Joint Committee for Guides in Metrology. 2012. Diakses tanggal 28 March 2015.
^ ISO 80000-1 Quantities and units. Part 1: General (edisi ke-1st). Switzerland: ISO (the International Organization for Standardization). 2009-11-15. hlm. vi. Diakses tanggal 23 May 2015.

[1] ISO 80000-1:2009, The system of quantities, including the relations among them the quantities used as the basis of the units of the SI, is named the International System of Quantities, denoted 'ISQ', in all languages. [...] It should be realized, however, that ISQ is simply a convenient notation to assign to the essentially infinite and continually evolving and expanding system of quantities and equations on which all of modern science and technology rests. ISQ is a shorthand notation for the 'system of quantities on which the SI is based', which was the phrase used for this system in ISO 31.

[2] The International System of Units (SI) (PDF) (edisi ke-8th), 2006, hlm. 104, diakses tanggal 2020-08-02, The system of quantities, including the equations relating the quantities, to be used with the SI, is in fact just the quantities and equations of physics that are familiar to all scientists, technologists, and engineers. They are listed in many textbooks and in many references, but any such list can only be a selection of the possible quantities and equations, which is without limit.

[3] The International System of Units (PDF) (edisi ke-9th), BIPM, 2019, hlm. 125, diakses tanggal 2020-08-02, The system of quantities underlying the SI and the equations relating them are based on the present description of nature and are familiar to all scientists, technologists and engineers.

[4] "1.16" (PDF). International vocabulary of metrology – Basic and general concepts and associated terms (VIM) (edisi ke-3rd). International Bureau of Weights and Measures (BIPM):Joint Committee for Guides in Metrology. 2012. Diakses tanggal 28 March 2015.

[5] ISO 80000-1 Quantities and units. Part 1: General (edisi ke-1st). Switzerland: ISO (the International Organization for Standardization). 2009-11-15. hlm. vi. Diakses tanggal 23 May 2015.

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