TS 293

TS 293 is a withdrawn Turkish standard prepared for the International System of Units (SI), specifically for the fundamental quantities and base units. It addresses the common metrological language behind measurement: how physical quantities are named, how the core SI units are organised, and how consistent unit expression supports communication across engineering, science, and trade.

What fundamental quantities and base units mean

In general technical terms, fundamental quantities are the primary measurement categories on which derived quantities are built, such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity. Base units are the standard reference units for those categories. The SI framework matters because it gives different disciplines a shared structure for measurement, calculation, and comparison, reducing ambiguity when values move between documents, laboratories, and equipment specifications.

What this listing represents

• This record represents the Turkish standard for SI fundamental quantities and base units.
• The status is withdrawn, so it functions as a historical standard rather than a current active edition.
• The title note indicates that TS 294, TS 295, TS 296, and TS 297 were later prepared in place of this single standard, showing a subsequent division of the subject matter.